CN105988198A - Image capturing lens assembly, image capturing device and electronic device - Google Patents

Abstract

The invention discloses an image capturing lens assembly, an image capturing device and an electronic device. The image capturing lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element with refractive power has an object-side surface and an image-side surface which are aspheric. The fourth lens element with negative refractive power has an object-side surface and an image-side surface which are both aspheric. The fifth lens element with negative refractive power has a concave object-side surface, and both object-side and image-side surfaces thereof are aspheric. When the specific conditions are satisfied, the volume of the image capturing lens assembly can be effectively controlled, so that the carrying convenience is improved. The invention also discloses an image taking device with the image taking lens group and an electronic device with the image taking device.

Description

Image pickup lens group, image pickup device and electronic device

technical field

The present invention relates to an image capturing lens group and an image capturing device, and in particular to a miniaturized image capturing lens group and an image capturing device applied to an electronic device.

Background technique

In recent years, with the rise of electronic products with photographic functions, the demand for optical systems has increased day by day. The photosensitive element of the general optical system is nothing more than two types of photosensitive coupling device (Charge Coupled Device, CCD) or complementary metal oxide semiconductor device (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), and with the improvement of semiconductor process technology, making The pixel size of the photosensitive element is shrinking, and the optical system is gradually developing into the high-pixel field, so the requirements for image quality are also increasing.

Traditionally, optical systems mounted on electronic products mostly use four-element or five-element lens structures. However, due to the prevalence of high-standard mobile devices such as smart phones (Smart Phone) and tablet computers (Tablet PC), the optical system is driven by the pixel With the rapid increase in imaging quality, known optical systems will not be able to meet higher-level photography systems.

Take the five-element optical system of Telephoto as an example. It is mostly equipped with a spherical glass lens. However, this configuration not only makes the lens too bulky and difficult to carry, but also the high unit price of the product also discourages consumers. , so the known optical systems can no longer meet the current photographic needs of general consumers in pursuit of convenience and versatility.

Contents of the invention

The invention provides an imaging lens group, an imaging device and an electronic device. The first lens of the imaging lens group has a positive refractive power, which can concentrate the overall light gathering ability of the imaging lens group at its object side end, thereby The volume of the imaging lens group can be effectively controlled to improve the convenience of carrying. In addition, both the fourth lens and the fifth lens of the imaging lens group have negative refractive power, so that the principal point (PrincipalPoint) of the imaging lens group can be kept away from its image-side end, and the rear of the imaging lens group can be effectively controlled. The focal length is conducive to maintaining miniaturization.

According to the present invention, there is provided an imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side. The first lens has positive refractive power, and its object-side surface is convex. The second lens has refractive power. The third lens has refractive power, and its object-side surface and image-side surface are both aspherical. The fourth lens has negative refractive power, and its object-side surface and image-side surface are both aspherical. The fifth lens has negative refractive power, its object-side surface is concave, and its object-side and image-side surfaces are both aspherical. The total number of lenses with refractive power in the imaging lens group is five. The focal length of the imaging lens group is f, the focal length of the first lens is f1, the focal length of the fourth lens is f4, the radius of curvature of the object-side surface of the first lens is R1, the curvature radius of the image-side surface of the first lens is R2, and the The thickness of a lens on the optical axis is CT1, which satisfies the following conditions:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5;

-1.0<f1/f4<0; and

3.4<f/R1.

According to the present invention, there is also provided an imaging device, comprising the aforementioned imaging lens group and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on the imaging surface of the imaging lens group.

According to the present invention, a kind of imaging device is further provided, comprising the aforementioned imaging lens group, prism and electronic photosensitive element, wherein the prism is arranged on the optical path between the subject and the imaging surface of the imaging lens group, and the electronic photosensitive element is arranged on the imaging surface of the imaging lens group.

According to the present invention, there is further provided an electronic device, including the aforementioned image capturing device.

According to the present invention, there is also provided an imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side. The first lens has positive refractive power, and its object-side surface is convex. The second lens has refractive power. The third lens has refractive power, and its object-side surface and image-side surface are both aspherical. The fourth lens has negative refractive power, its image-side surface is concave, and both its object-side and image-side surfaces are aspherical. The fifth lens has negative refractive power, and its object-side surface and image-side surface are both aspherical. The total number of lenses with refractive power in the imaging lens group is five, the focal length of the imaging lens group is f, the focal length of the first lens is f1, the focal length of the fourth lens is f4, and the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, and the thickness of the first lens on the optical axis is CT1, which satisfies the following conditions:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5;

-1.0<f1/f4<0; and

3.4<f/R1.

When (f/R1)-(f/R2)+((f×CT1)/(R1×R2)) satisfies the above conditions, the balance between the surface shape and thickness of the imaging lens group as a whole and the first lens can be balanced at the same time relationship, so that the first lens can exert its maximum effect, and then control the shooting range, so as to achieve the best quality of long-distance shooting.

When f1/f4 meets the above conditions, the deflection of light at the object side of the imaging lens group can be enhanced, and the lens magnification can be increased in a limited space, so that the same image range can receive more light.

When f/R1 satisfies the above conditions, the shooting range can be effectively controlled, so that the imaging quality of partial images has a higher resolution.

Description of drawings

FIG. 1 shows a schematic diagram of an imaging device according to a first embodiment of the present invention;

Figure 2 is the spherical aberration, astigmatism and distortion curves of the first embodiment in order from left to right;

3 shows a schematic diagram of an imaging device according to a second embodiment of the present invention;

Fig. 4 is the spherical aberration, astigmatism and distortion curves of the second embodiment in order from left to right;

5 shows a schematic diagram of an imaging device according to a third embodiment of the present invention;

Fig. 6 is the spherical aberration, astigmatism and distortion curves of the third embodiment in sequence from left to right;

7 is a schematic diagram of an imaging device according to a fourth embodiment of the present invention;

Fig. 8 is the spherical aberration, astigmatism and distortion curves of the fourth embodiment in order from left to right;

9 is a schematic diagram of an imaging device according to a fifth embodiment of the present invention;

Fig. 10 is the spherical aberration, astigmatism and distortion curves of the fifth embodiment in sequence from left to right;

11 is a schematic diagram of an imaging device according to a sixth embodiment of the present invention;

Figure 12 is the spherical aberration, astigmatism and distortion curves of the sixth embodiment in sequence from left to right;

13 is a schematic diagram of an imaging device according to a seventh embodiment of the present invention;

Figure 14 is the spherical aberration, astigmatism and distortion curves of the seventh embodiment in order from left to right;

15 is a schematic diagram of an imaging device according to an eighth embodiment of the present invention;

Fig. 16 is the spherical aberration, astigmatism and distortion curves of the eighth embodiment in order from left to right;

17 is a schematic diagram of an imaging device according to a ninth embodiment of the present invention;

Fig. 18 is the spherical aberration, astigmatism and distortion curves of the ninth embodiment in order from left to right;

19 is a schematic diagram of an imaging device according to a tenth embodiment of the present invention;

Fig. 20 is the spherical aberration, astigmatism and distortion curves of the tenth embodiment in order from left to right;

21 is a schematic diagram of an imaging device according to an eleventh embodiment of the present invention;

Fig. 22 is the spherical aberration, astigmatism and distortion curves of the eleventh embodiment in order from left to right;

23 is a schematic diagram of an imaging device according to a twelfth embodiment of the present invention;

Fig. 24 is the spherical aberration, astigmatism and distortion curves of the twelfth embodiment in sequence from left to right;

25 is a schematic diagram of an imaging device according to a thirteenth embodiment of the present invention;

Fig. 26 is the spherical aberration, astigmatism and distortion curves of the thirteenth embodiment in sequence from left to right;

Fig. 27 is a schematic diagram showing the arrangement relationship between the imaging lens group, the subject and its imaging surface according to the first embodiment in Fig. 1;

Fig. 28 is a schematic diagram showing another arrangement relationship between the imaging lens group, the prism, the subject and its imaging surface according to the first embodiment in Fig. 1;

FIG. 29 is a schematic diagram of an electronic device according to a fourteenth embodiment of the present invention;

FIG. 30 is a schematic diagram of an electronic device according to a fifteenth embodiment of the present invention; and

FIG. 31 is a schematic diagram of an electronic device according to a sixteenth embodiment of the present invention.

【Symbol Description】

Electronics: 10, 20, 30

Image taking device: 11, 21, 31

Aperture: 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300

Aperture: 1001

First lens: 110, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110, 1210, 1310

Object side surface: 111, 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1111, 1211, 1311

Image side surface: 112, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112, 1212, 1312

Second lens: 120, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1220, 1320

Object side surface: 121, 221, 321, 421, 521, 621, 721, 821, 921, 1021, 1121, 1221, 1321

Image side surface: 122, 222, 322, 422, 522, 622, 722, 822, 922, 1022, 1122, 1222, 1322

Third lens: 130, 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330

Object side surface: 131, 231, 331, 431, 531, 631, 731, 831, 931, 1031, 1131, 1231, 1331

Image side surface: 132, 232, 332, 432, 532, 632, 732, 832, 932, 1032, 1132, 1232, 1332

Fourth lens: 140, 240, 340, 440, 540, 640, 740, 840, 940, 1040, 1140, 1240, 1340

Object side surface: 141, 241, 341, 441, 541, 641, 741, 841, 941, 1041, 1141, 1241, 1341

Image side surface: 142, 242, 342, 442, 542, 642, 742, 842, 942, 1042, 1142, 1242, 1342

Fifth lens: 150, 250, 350, 450, 550, 650, 750, 850, 950, 1050, 1150, 1250, 1350

Object side surface: 151, 251, 351, 451, 551, 651, 751, 851, 951, 1051, 1151, 1251, 1351

Image side surface: 152, 252, 352, 452, 552, 652, 752, 852, 952, 1052, 1152, 1252, 1352

Infrared filter elements: 160, 260, 360, 460, 560, 660, 760, 860, 960, 1060, 1160, 1260, 1360

Imaging surface: 170, 270, 370, 470, 570, 670, 770, 870, 970, 1070, 1170, 1270, 1370

Electronic photosensitive element: 180, 280, 380, 480, 580, 680, 780, 880, 980, 1080, 1180, 1280, 1380

O: subject

L: Capture lens group

P: Prism

f: the focal length of the imaging lens group

Fno: the aperture value of the imaging lens group

HFOV: half of the maximum angle of view in the imaging lens group

N1: Refractive index of the first lens

N2: Refractive index of the second lens

N3: Refractive index of the third lens

N4: Refractive index of the fourth lens

N5: Refractive index of the fifth lens

Nmax: the largest of N1, N2, N3, N4 and N5

V4: Dispersion coefficient of the fourth lens

V5: Dispersion coefficient of the fifth lens

T12: the distance between the first lens and the second lens on the optical axis

T23: the distance between the second lens and the third lens on the optical axis

T34: the distance between the third lens and the fourth lens on the optical axis

T45: the distance between the fourth lens and the fifth lens on the optical axis

R1: radius of curvature of the object-side surface of the first lens

R2: Radius of curvature of the image-side surface of the first lens

R8: Radius of curvature of the image-side surface of the fourth lens

R9: radius of curvature of the object-side surface of the fifth lens

f1: focal length of the first lens

f4: focal length of the fourth lens

f5: focal length of the fifth lens

f12: composite focal length of the first lens and the second lens

f45: composite focal length of the fourth lens and the fifth lens

CT1: the thickness of the first lens on the optical axis

SD: the distance from the aperture to the image side surface of the fifth lens on the optical axis

TD: the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens

ImgH: The maximum image height of the imaging lens group

EPD: Entrance pupil diameter of the imaging lens group

TL: the distance from the object-side surface of the first lens to the imaging plane on the optical axis

detailed description

Provided is an imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side, wherein the total number of lenses with refractive power in the imaging lens group is five piece.

In the first lens, the second lens, the third lens, the fourth lens and the fifth lens of the imaging lens group mentioned in the previous paragraph, any two adjacent lenses have an air gap on the optical axis, that is to say, The imaging lens group has five single non-cemented lenses. Because the manufacturing process of cemented lenses is more complicated than that of non-cemented lenses, especially the bonding surface of the two lenses must have a high-precision curved surface in order to achieve high adhesion when the two lenses are bonded, and during the bonding process, it is also possible Poor adhesion due to misalignment affects the overall optical imaging quality. Therefore, in the imaging lens set of the present invention, there is an air space between any two adjacent lenses with refractive power, which can effectively solve the problems caused by cemented lenses.

The first lens has a positive refractive power, its object-side surface is convex, and its image-side surface can be convex, so that the light-gathering ability of the entire imaging lens group can be concentrated on its object-side end, and image capturing can be effectively controlled. The volume of the lens group improves the convenience of carrying.

The second lens may have a negative refractive power. Thereby, the aberration of the imaging lens group can be corrected to improve the imaging quality.

The third lens may have positive refractive power, and its image-side surface may be convex. Thereby, the distribution of the positive refractive power of the imaging lens group can be balanced and the sensitivity thereof can be reduced.

The fourth lens has negative refractive power, its object-side surface can be concave, and its image-side surface can be concave. In this way, the principal point of the imaging lens group can be kept away from its image side end, and the back focus of the imaging lens group can be effectively controlled, which is conducive to maintaining miniaturization, and can strengthen the correction of the aberration of the imaging lens group to improve Image quality.

The fifth lens has negative refractive power, its object-side surface can be concave, and its image-side surface can be convex. In this way, the principal point of the imaging lens group can be kept away from its image side, and the back focus of the imaging lens group can be effectively controlled, which is conducive to maintaining miniaturization, and can correct the astigmatism of the imaging lens group to improve imaging quality.

The focal length of the imaging lens group is f, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, and the thickness of the first lens on the optical axis is CT1, which satisfy the following conditions: 3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5. In this way, the relationship between the entire imaging lens group and the surface shape and thickness of the first lens can be balanced at the same time, so that the first lens can exert its maximum effect, and then the shooting range can be controlled to achieve the best remote shooting quality. Preferably, it can satisfy the following condition: 3.7<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<6.0.

The focal length of the first lens is f1, and the focal length of the fourth lens is f4, which satisfy the following condition: −1.0<f1/f4<0. In this way, the light deflection degree at the object side end of the imaging lens group can be enhanced, and the lens magnification can be increased in a limited space, so that the same image range can receive more light.

The focal length of the imaging lens group is f, and the curvature radius of the object-side surface of the first lens is R1, which satisfies the following condition: 3.4<f/R1. In this way, the shooting range can be effectively controlled, so that the imaging quality of partial images has a higher resolution.

The imaging lens group may further include an aperture, and the aperture may be disposed between the first lens and the third lens. The distance from the aperture to the image-side surface of the fifth lens on the optical axis is SD, and the distance from the object-side surface of the first lens to the image-side surface of the fifth lens on the optical axis is TD, which can meet the following conditions: 0.65<SD/TD <1.0. Thereby, it is beneficial for the imaging lens group to achieve a balance between the telecentric characteristic and the wide field of view characteristic. Preferably, it can satisfy the following condition: 0.65<SD/TD<0.87.

The radius of curvature of the image-side surface of the fourth lens is R8, and the curvature radius of the object-side surface of the fifth lens is R9, which can satisfy the following condition: -0.1<(R8+R9)/(R8-R9). In this way, the air gap between the fourth lens and the fifth lens can be controlled, and then the light deflection between the fourth lens and the fifth lens can be adjusted to balance the converging ability of near-axis and off-axis beams.

The radius of curvature of the object-side surface of the first lens is R1, and the curvature radius of the image-side surface of the first lens is R2, which can satisfy the following condition: -1.5<(R1+R2)/(R1-R2)<0. Thereby, it is beneficial to reduce spherical aberration and astigmatism to improve imaging quality, and it can control the shooting range to achieve the best quality of remote shooting.

The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, N1, N2, N3 The largest of , N4 and N5 is Nmax, which can satisfy the following conditions: 1.50<Nmax<1.70. In this way, proper refractive index configuration can reduce chromatic aberration and help improve imaging quality.

At least one lens among the first lens, the second lens, the third lens, the fourth lens and the fifth lens may have positive refractive power, and the dispersion coefficient of the lens with positive refractive power is less than 30. Thereby, the distribution of the positive refractive power of the imaging lens group can be balanced, its sensitivity can be reduced, and its chromatic aberration can be corrected.

The distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34 , the distance between the fourth lens and the fifth lens on the optical axis is T45, and T45 may be greater than T12, T23 and T34. In this way, the imaging lens group has enough space to relax the optical path, and at the same time helps to increase the imaging height.

The focal length of the imaging lens group is f, and the maximum image height of the imaging lens group is ImgH (that is, half of the diagonal length of the effective sensing area of the electronic photosensitive element), which can meet the following conditions: 2.3<f/ImgH< 6.0. Thereby, the volume of the imaging lens group can be effectively controlled, the miniaturization of the imaging lens group can be maintained, and the convenience of portability can be improved.

The entrance pupil diameter of the imaging lens group is EPD, and the maximum image height of the imaging lens group is ImgH, which can satisfy the following conditions: 0.7<EPD/ImgH<2.0. In this way, the amount of light entering the imaging lens group can be increased to obtain a higher resolution capability.

At least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens may include at least one inflection point. In this way, it is helpful to correct the aberration of the off-axis field of view to improve the quality of peripheral images.

The focal length of the imaging lens group is f, and the distance on the optical axis from the object-side surface of the first lens to the imaging surface is TL, which can satisfy the following conditions: 0.75<TL/f<1.0. In this way, the spatial configuration of the lens can be effectively controlled, and the ability of distant view shooting can be improved.

The distance on the optical axis from the object-side surface of the first lens to the imaging plane is TL, which can satisfy the following condition: TL<7.5 mm. Thereby, it is beneficial to maintain the miniaturization of the imaging lens group.

Among the refractive powers of the first lens, the second lens, the third lens, the fourth lens and the fifth lens, the refractive power of the first lens may be the strongest. (The strength and weakness of the inflection force are the results of the relative comparison of the net value of the inflection force. A strong inflection force means a larger net value, and a weak inflection force means a smaller net value). Thereby, the converging ability of the first lens can be enhanced, and the total length of the imaging lens group can be shortened.

The focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, which may satisfy the following condition: 0<f4/f5. Thereby, the principal point of the imaging lens group can be kept away from its image-side end, and the back focus of the imaging lens group can be effectively controlled, which is beneficial to maintaining miniaturization.

The distance between the third lens and the fourth lens on the optical axis is T34, and the distance between the fourth lens and the fifth lens on the optical axis is T45, which can satisfy the following condition: T34/T45<1.2. In this way, the matching between the third lens and the fourth lens can be helped to reduce aberrations interactively, and at the same time, there is enough balance space between the third lens and the fourth lens.

The distance on the optical axis from the object-side surface of the first lens to the imaging plane is TL, and the maximum image height of the imaging lens group is ImgH, which can satisfy the following conditions: 2.0<TL/ImgH<3.5. Thereby, the total length of the imaging lens group can be effectively shortened to maintain its miniaturization.

The dispersion coefficient of the fourth lens is V4, and the dispersion coefficient of the fifth lens is V5, which can satisfy the following condition: 90<V4+V5<130. Thereby, it is helpful to correct the chromatic aberration of the imaging lens group.

Half of the maximum viewing angle in the imaging lens group is HFOV, which can satisfy the following condition: 0.3<tan(2×HFOV)<1.1. Thereby, an appropriate viewing angle and imaging range can be obtained, and the influence of stray light can be reduced.

The combined focal length of the first lens and the second lens is f12, and the combined focal length of the fourth lens and the fifth lens is f45, which can satisfy the following condition: -2.0<f12/f45<0. In this way, it is helpful to form a telescopic optical system with front positive and rear negative, so that the telephoto can be clearly imaged.

In the imaging lens set provided by the present invention, the material of the lens can be plastic or glass. When the material of the lens is plastic, the production cost can be effectively reduced. In addition, when the material of the lens is glass, the degree of freedom in the configuration of the refractive power of the imaging lens group can be increased. In addition, the object-side surface and the image-side surface of the imaging lens group can be aspherical (ASP), and the aspheric surface can be easily made into a shape other than a spherical surface, and more control variables can be obtained to reduce aberrations and reduce lens size. Therefore, the total length of the imaging lens group of the present invention can be effectively reduced.

Furthermore, in the imaging lens group provided by the present invention, if the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the concave position is not defined , it means that the lens surface is concave at the near optical axis. In the imaging lens set provided by the present invention, if the lens has positive refractive power or negative refractive power, or the focal length of the lens, it refers to the refractive power or focal length of the lens near the optical axis.

The imaging surface of the imaging lens group of the present invention can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive element.

In addition, in the imaging lens group of the present invention, at least one diaphragm can be provided according to requirements to reduce stray light and improve image quality.

In the imaging lens group of the present invention, the aperture configuration can be a front aperture or a middle aperture, wherein the front aperture means that the aperture is set between the subject and the first lens, and the middle aperture means that the aperture is set on the first lens and the imaging surface. If the aperture is a front aperture, it can make the exit pupil (Exit Pupil) of the imaging lens group and the imaging surface have a longer distance, so that it has a telecentric (Telecentric) effect, and can increase the CCD or CMOS reception of the electronic photosensitive element The efficiency of the image; if it is a central aperture, it will help expand the field of view of the system, so that the imaging lens group has the advantage of a wide-angle lens.

The imaging lens group of the present invention can be applied to the optical system of moving focusing according to the requirements, and has the characteristics of excellent aberration correction and good imaging quality. The present invention can also be applied in various aspects to electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing developing devices, and wearable products. device.

The present invention provides an image capturing device, comprising the aforementioned image capturing lens group and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on the imaging surface of the image capturing lens group. With the positive refractive power of the first lens, the overall light gathering capability of the imaging lens group can be concentrated on the object side end, thereby effectively controlling the volume of the imaging lens group to improve portability. In addition, both the fourth lens and the fifth lens of the image-taking lens group have negative refractive power, so that the principal point (Principal Point) of the image-taking lens group can be kept away from its image-side end, and the image-taking lens group can be effectively controlled. The back focal length is conducive to maintaining miniaturization. Preferably, the imaging device may further include a barrel (Barrel Member), a support device (Holder Member) or a combination thereof.

The imaging device may further include a prism, which is arranged on the optical path between the subject and the imaging surface of the imaging lens group, which may be arranged between the subject and the imaging lens group (as shown in Figure 28), It can also be arranged in the imaging lens group (not shown in the figure) or between the imaging lens group and the imaging surface (not shown in the figure). In this way, the optical path of the incident light can be diverted according to actual needs, the height of the imaging lens group required to be arranged can be reduced, and the miniaturization of the imaging device or the electronic device mounted thereon can be further promoted.

The present invention provides an electronic device, including the aforementioned image capturing device. In this way, while taking advantage of the advantages of miniaturization, it can provide a better perspective photography effect and improve the imaging quality. Preferably, the electronic device may further include a control unit (Control Unit), a display unit (Display), a storage unit (Storage Unit), a random access memory (RAM) or a combination thereof.

According to the above implementation manners, specific embodiments are proposed below and described in detail with reference to the accompanying drawings.

<First embodiment>

Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 shows a schematic diagram of an imaging device according to the first embodiment of the present invention, and FIG. 2 shows the spherical aberration, astigmatism and distortion of the first embodiment in order from left to right Graph. As can be seen from FIG. 1 , the imaging device of the first embodiment includes an imaging lens group (not otherwise labeled) and an electronic photosensitive element 180 . The imaging lens group includes a first lens 110, an aperture 100, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, an infrared filter element 160 and an imaging lens in sequence from the object side to the image side. surface 170, and the electronic photosensitive element 180 is arranged on the imaging surface 170 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (110-150), and the first lens 110, the second lens 120, Among the third lens 130 , the fourth lens 140 and the fifth lens 150 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 110 has positive refractive power and is made of plastic material. The object-side surface 111 is convex, and the image-side surface 112 is convex, both of which are aspherical. In addition, the object-side surface 111 of the first lens has at least one inflection point.

The second lens 120 has negative refractive power and is made of plastic material. The object-side surface 121 is concave, and the image-side surface 122 is concave, both of which are aspherical. In addition, the object-side surface 121 of the second lens has at least one inflection point.

The third lens 130 has positive refractive power and is made of plastic material. The object-side surface 131 is concave, and the image-side surface 132 is convex, both of which are aspherical. In addition, both the object-side surface 131 and the image-side surface 132 of the third lens have at least one inflection point.

The fourth lens 140 has negative refractive power and is made of plastic material. The object-side surface 141 is concave, and the image-side surface 142 is concave, both of which are aspherical. In addition, the image-side surface 142 of the fourth lens has at least one inflection point.

The fifth lens 150 has negative refractive power and is made of plastic material. The object-side surface 151 is concave, and the image-side surface 152 is convex, both of which are aspherical.

In addition, among the refractive powers of the first lens 110 , the second lens 120 , the third lens 130 , the fourth lens 140 and the fifth lens 150 , the refractive power of the first lens 110 is the strongest.

The infrared filtering element 160 is made of glass, and is disposed between the fifth lens 150 and the imaging surface 170 without affecting the focal length of the imaging lens group.

The curve equations of the aspheric surfaces of the above-mentioned lenses are expressed as follows:

$\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sqrt</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Y</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Ai</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

in:

X: The point on the aspheric surface whose distance from the optical axis is Y, and its relative distance from the intersection point tangent to the aspheric optical axis;

Y: The vertical distance between the point on the aspheric curve and the optical axis;

R: radius of curvature;

k: cone coefficient; and

Ai: i-th order aspheric coefficient.

In the imaging lens group of the first embodiment, the focal length of the imaging lens group is f, the aperture value (f-number) of the imaging lens group is Fno, half of the maximum viewing angle in the imaging lens group is HFOV, and its numerical value is as follows : f = 6.07mm; Fno = 2.95; and HFOV = 18.5 degrees.

In the imaging lens group of the first embodiment, the refractive index of the first lens 110 is N1, the refractive index of the second lens 120 is N2, the refractive index of the third lens 130 is N3, and the refractive index of the fourth lens 140 is N4 , the refractive index of the fifth lens is N5, and the largest of N1, N2, N3, N4 and N5 is Nmax, which satisfies the following condition: Nmax=1.639.

In the imaging lens group of the first embodiment, the dispersion coefficient of the fourth lens 140 is V4, and the dispersion coefficient of the fifth lens 150 is V5, which satisfy the following condition: V4+V5=111.8.

In the imaging lens group of the first embodiment, the distance between the third lens 130 and the fourth lens 140 on the optical axis is T34, and the distance between the fourth lens 140 and the fifth lens on the optical axis is T45, which satisfies The following condition: T34/T45 = 0.21.

In the imaging lens group of the first embodiment, the focal length of the imaging lens group is f, and the curvature radius of the object-side surface 111 of the first lens is R1, which satisfies the following condition: f/R1=4.10.

In the imaging lens group of the first embodiment, the radius of curvature of the object-side surface 111 of the first lens is R1, the radius of curvature of the image-side surface 112 of the first lens is R2, and the radius of curvature of the image-side surface 142 of the fourth lens is R8. The radius of curvature of the fifth lens object-side surface 151 is R9, which satisfies the following conditions: (R1+R2)/(R1-R2)=-0.58; and (R8+R9)/(R8-R9)=0.22.

In the imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, and the composite focal length of the first lens 110 and the second lens 120 is f12, the composite focal length of the fourth lens 140 and the fifth lens 150 is f45, which satisfies the following conditions: f1/f4=-0.56; f4/f5=0.08; and f12/f45-1.19.

In the imaging lens group of the first embodiment, the focal length of the imaging lens group is f, the radius of curvature of the first lens object side surface 111 is R1, the curvature radius of the first lens image side surface 112 is R2, and the first lens 110 The thickness on the optical axis is CT1, which satisfies the following condition: (f/R1)−(f/R2)+((f×CT1)/(R1×R2))=4.40.

In the imaging lens group of the first embodiment, half of the maximum viewing angle in the imaging lens group is HFOV, which satisfies the following condition: tan(2×HFOV)=0.75.

In the image-taking lens group of the first embodiment, the distance from the aperture 100 to the image-side surface 152 of the fifth lens on the optical axis is SD, and the distance from the object-side surface 111 of the first lens to the image-side surface 152 of the fifth lens on the optical axis is SD. The distance is TD, which satisfies the following condition: SD/TD=0.76.

In the imaging lens group of the first embodiment, the focal length of the imaging lens group is f, the maximum image height of the imaging lens group is ImgH, and the entrance pupil diameter of the imaging lens group is EPD, which satisfies the following conditions: f/ImgH = 2.89; and EPD/ImgH = 0.98.

In the imaging lens group of the first embodiment, the distance on the optical axis from the first lens object side surface 111 to the imaging surface 170 is TL, the focal length of the imaging lens group is f, and the maximum image height of the imaging lens group is ImgH , which satisfies the following conditions: TL=5.89; TL/f=0.97; and TL/ImgH=2.81.

Then refer to Table 1 and Table 2 below.

Table 1 shows the detailed structural data of the first embodiment in FIG. 1 , where the units of the radius of curvature, thickness and focal length are mm, and surfaces 0-14 represent surfaces from the object side to the image side in sequence. Table 2 shows the aspheric surface data in the first embodiment, wherein k represents the cone coefficient in the aspheric curve equation, and A4-A14 represent the 4th-14th order aspheric coefficients of each surface. In addition, the tables of the following embodiments are schematic diagrams and aberration curve diagrams corresponding to the respective embodiments, and the definitions of the data in the tables are the same as those in Table 1 and Table 2 of the first embodiment, and will not be repeated here.

In addition, it can be seen from Table 1 above that in the first embodiment, the third lens 130 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be known from the above Table 1 that in the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis is T12, and the distance between the second lens 120 and the third lens 130 on the optical axis is T12. is T23, the distance between the third lens 130 and the fourth lens 140 on the optical axis is T34, and the distance between the fourth lens 140 and the fifth lens 150 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34.

Please refer to FIG. 27 , which is a schematic diagram illustrating the arrangement relationship between the imaging lens group L, the object O and its imaging surface 170 according to the first embodiment of FIG. 1 . It can be seen from FIG. 27 that the incident light is incident on the imaging lens group L in a straight line from the subject O, and forms an image on the imaging surface 170 thereof.

Referring again to FIG. 28 , it is a schematic diagram illustrating another arrangement relationship between the imaging lens group L, the prism P, the object O and its imaging surface 170 according to the first embodiment in FIG. 1 . It can be seen from FIG. 28 that the imaging device may further include a prism P disposed on the optical path between the subject O and the imaging surface 170 of the imaging lens group L. As shown in FIG. The arrangement of the prism P can divert the optical path of the incident light, reduce the height of the imaging lens group L, and promote the miniaturization of the imaging device or the electronic device mounted thereon.

The following embodiments can all be configured as shown in FIG. 27 or FIG. 28 , so no further description is given.

<Second Embodiment>

Please refer to FIG. 3 and FIG. 4, wherein FIG. 3 shows a schematic diagram of an imaging device according to the second embodiment of the present invention, and FIG. 4 shows the spherical aberration, astigmatism and distortion of the second embodiment in sequence from left to right Graph. As can be seen from FIG. 2 , the image capturing device of the second embodiment includes an image capturing lens group (not labeled separately) and an electronic photosensitive element 280 . The imaging lens group includes a first lens 210, an aperture 200, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, an infrared filter element 260 and an imaging lens in sequence from the object side to the image side. surface 270, and the electronic photosensitive element 280 is arranged on the imaging surface 270 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (210-250), and the first lens 210, the second lens 220, Among the third lens 230 , the fourth lens 240 and the fifth lens 250 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 210 has positive refractive power and is made of plastic material. The object-side surface 211 is convex, and the image-side surface 212 is convex, both of which are aspherical. In addition, the object-side surface 211 of the first lens has at least one inflection point.

The second lens 220 has negative refractive power and is made of plastic material. The object-side surface 221 is concave, and the image-side surface 222 is concave, both of which are aspherical. In addition, the object-side surface 221 of the second lens has at least one inflection point.

The third lens 230 has a positive refractive power and is made of plastic material. The object-side surface 231 is convex, and the image-side surface 232 is convex, both of which are aspherical. In addition, the object-side surface 231 of the third lens has at least one inflection point.

The fourth lens 240 has negative refractive power and is made of plastic material. The object-side surface 241 is concave, and the image-side surface 242 is concave, both of which are aspherical.

The fifth lens 250 has negative refractive power and is made of plastic material. The object-side surface 251 is concave, and the image-side surface 252 is convex, both of which are aspherical. In addition, the object-side surface 251 of the fifth lens has at least one inflection point.

In addition, among the refractive powers of the first lens 210 , the second lens 220 , the third lens 230 , the fourth lens 240 and the fifth lens 250 , the refractive power of the first lens 210 is the strongest.

The infrared filter element 260 is made of glass, and is disposed between the fifth lens 250 and the imaging surface 270 without affecting the focal length of the imaging lens group.

Then refer to Table 3 and Table 4 below.

In the second embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 3 and Table 4, the following data can be deduced:

In addition, it can be seen from Table 3 above that in the second embodiment, the third lens 230 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be known from Table 3 above that in the second embodiment, the distance between the first lens 210 and the second lens 220 on the optical axis is T12, and the distance between the second lens 220 and the third lens 230 on the optical axis is is T23, the distance between the third lens 230 and the fourth lens 240 on the optical axis is T34, and the distance between the fourth lens 240 and the fifth lens 250 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34.

<Third embodiment>

Please refer to FIG. 5 and FIG. 6, wherein FIG. 5 shows a schematic diagram of an imaging device according to the third embodiment of the present invention, and FIG. 6 shows the spherical aberration, astigmatism and distortion of the third embodiment in sequence from left to right Graph. It can be seen from FIG. 5 that the image capturing device of the third embodiment includes an image capturing lens group (not another number) and an electronic photosensitive element 380 . The imaging lens group includes a first lens 310, an aperture 300, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, an infrared filter element 360, and an imaging lens in sequence from the object side to the image side. surface 370, and the electronic photosensitive element 380 is arranged on the imaging surface 370 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (310-350), and the first lens 310, the second lens 320, Among the third lens 330 , the fourth lens 340 and the fifth lens 350 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 310 has positive refractive power and is made of plastic material. The object-side surface 311 is convex, and the image-side surface 312 is convex, both of which are aspherical. In addition, the object-side surface 311 of the first lens has at least one inflection point.

The second lens 320 has negative refractive power and is made of plastic material. The object-side surface 321 is concave, and the image-side surface 322 is concave, both of which are aspherical. In addition, the object-side surface 321 of the second lens has at least one inflection point.

The third lens 330 has positive refractive power and is made of plastic material. The object-side surface 331 is concave, and the image-side surface 332 is convex, both of which are aspherical. In addition, the object-side surface 331 of the third lens has at least one inflection point.

The fourth lens 340 has negative refractive power and is made of plastic material. The object-side surface 341 is concave, and the image-side surface 342 is concave, both of which are aspherical.

The fifth lens 350 has negative refractive power and is made of plastic material. The object-side surface 351 is concave, and the image-side surface 352 is convex, both of which are aspherical. In addition, the object-side surface 351 of the fifth lens has at least one inflection point.

In addition, among the refractive powers of the first lens 310 , the second lens 320 , the third lens 330 , the fourth lens 340 and the fifth lens 350 , the refractive power of the first lens 310 is the strongest.

The infrared filter element 360 is made of glass, and is disposed between the fifth lens 350 and the imaging surface 370 without affecting the focal length of the imaging lens group.

Then refer to Table 5 and Table 6 below.

In the third embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 5 and Table 6, the following data can be deduced:

In addition, it can be seen from Table 5 above that in the third embodiment, the third lens 330 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be known from Table 5 above that in the third embodiment, the distance between the first lens 310 and the second lens 320 on the optical axis is T12, and the distance between the second lens 320 and the third lens 330 on the optical axis is T23, the distance between the third lens 330 and the fourth lens 340 on the optical axis is T34, and the distance between the fourth lens 340 and the fifth lens 350 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34.

<Fourth Embodiment>

Please refer to FIG. 7 and FIG. 8, wherein FIG. 7 shows a schematic diagram of an imaging device according to the fourth embodiment of the present invention, and FIG. 8 shows the spherical aberration, astigmatism and distortion of the fourth embodiment in sequence from left to right Graph. It can be seen from FIG. 7 that the image capturing device of the fourth embodiment includes an image capturing lens group (not another number) and an electronic photosensitive element 480 . The imaging lens group includes a first lens 410, an aperture 400, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, an infrared filter element 460, and an imaging lens in sequence from the object side to the image side. surface 470, and the electronic photosensitive element 480 is arranged on the imaging surface 470 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (410-450), and the first lens 410, the second lens 420, Among the third lens 430 , the fourth lens 440 and the fifth lens 450 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 410 has positive refractive power and is made of plastic material. The object-side surface 411 is convex, and the image-side surface 412 is convex, both of which are aspherical. In addition, the object-side surface 411 of the first lens has at least one inflection point.

The second lens 420 has negative refractive power and is made of plastic material. The object-side surface 421 is concave, and the image-side surface 422 is concave, both of which are aspherical. In addition, the object-side surface 421 of the second lens has at least one inflection point.

The third lens 430 has positive refractive power and is made of plastic material. The object-side surface 431 is concave, and the image-side surface 432 is convex, both of which are aspherical. In addition, both the object-side surface 431 and the image-side surface 432 of the third lens have at least one inflection point.

The fourth lens 440 has a negative refractive power and is made of plastic material. The object-side surface 441 is concave, and the image-side surface 442 is convex, both of which are aspherical. In addition, the image-side surface 442 of the fourth lens has at least one inflection point.

The fifth lens 450 has negative refractive power and is made of plastic material. The object-side surface 451 is concave, and the image-side surface 452 is concave, both of which are aspherical. In addition, the image-side surface 452 of the fifth lens has at least one inflection point.

In addition, among the refractive powers of the first lens 410 , the second lens 420 , the third lens 430 , the fourth lens 440 and the fifth lens 450 , the refractive power of the first lens 410 is the strongest.

The infrared filter element 460 is made of glass, and is disposed between the fifth lens 450 and the imaging surface 470 without affecting the focal length of the imaging lens group.

Then refer to Table 7 and Table 8 below.

In the fourth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 7 and Table 8, the following data can be deduced:

In addition, it can be seen from Table 7 above that in the fourth embodiment, the third lens 430 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be seen from Table 7 above that in the fourth embodiment, the distance between the first lens 410 and the second lens 420 on the optical axis is T12, and the distance between the second lens 420 and the third lens 430 on the optical axis is T23, the distance between the third lens 430 and the fourth lens 440 on the optical axis is T34, and the distance between the fourth lens 440 and the fifth lens 450 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34.

<Fifth Embodiment>

Please refer to FIG. 9 and FIG. 10, wherein FIG. 9 shows a schematic diagram of an imaging device according to a fifth embodiment of the present invention, and FIG. 10 shows the spherical aberration, astigmatism and distortion of the fifth embodiment in sequence from left to right Graph. As can be seen from FIG. 9 , the imaging device of the fifth embodiment includes an imaging lens group (not labeled separately) and an electronic photosensitive element 580 . The imaging lens group includes a first lens 510, an aperture 500, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, an infrared filter element 560 and an imaging lens in sequence from the object side to the image side. surface 570, and the electronic photosensitive element 580 is arranged on the imaging surface 570 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (510-550), and the first lens 510, the second lens 520, Among the third lens 530 , the fourth lens 540 and the fifth lens 550 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 510 has positive refractive power and is made of plastic material. The object-side surface 511 is convex, and the image-side surface 512 is convex, both of which are aspherical. In addition, the object-side surface 511 of the first lens has at least one inflection point.

The second lens 520 has negative refractive power and is made of plastic material. The object-side surface 521 is concave, and the image-side surface 522 is concave, both of which are aspherical. In addition, the object-side surface 521 of the second lens has at least one inflection point.

The third lens 530 has negative refractive power and is made of plastic material. The object-side surface 531 is concave, and the image-side surface 532 is convex, both of which are aspherical. In addition, the image-side surface 532 of the third lens has at least one inflection point.

The fourth lens 540 has negative refractive power and is made of plastic material. The object-side surface 541 is concave, and the image-side surface 542 is convex, both of which are aspherical. In addition, both the object-side surface 541 and the image-side surface 542 of the fourth lens have at least one inflection point.

The fifth lens 550 has negative refractive power and is made of plastic material. The object-side surface 551 is concave, and the image-side surface 552 is concave, both of which are aspherical. In addition, the image-side surface 552 of the fifth lens has at least one inflection point.

In addition, among the refractive powers of the first lens 510 , the second lens 520 , the third lens 530 , the fourth lens 540 and the fifth lens 550 , the refractive power of the first lens 510 is the strongest.

The infrared filter element 560 is made of glass, and is disposed between the fifth lens 550 and the imaging surface 570 without affecting the focal length of the imaging lens group.

Then refer to Table 9 and Table 10 below.

In the fifth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 9 and Table 10, the following data can be deduced:

Furthermore, it can be seen from Table 9 above that in the fifth embodiment, the distance between the first lens 510 and the second lens 520 on the optical axis is T12, and the distance between the second lens 520 and the third lens 530 on the optical axis is T12. T23, the distance between the third lens 530 and the fourth lens 540 on the optical axis is T34, and the distance between the fourth lens 540 and the fifth lens 550 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34.

<Sixth Embodiment>

Please refer to Figure 11 and Figure 12, wherein Figure 11 shows a schematic diagram of an imaging device according to the sixth embodiment of the present invention, and Figure 12 shows the spherical aberration, astigmatism and distortion of the sixth embodiment in sequence from left to right Graph. It can be seen from FIG. 11 that the image capturing device of the sixth embodiment includes an image capturing lens group (not another number) and an electronic photosensitive element 680 . The imaging lens group includes the first lens 610, the second lens 620, the aperture 600, the third lens 630, the fourth lens 640, the fifth lens 650, the infrared filter element 660 and the imaging lens in order from the object side to the image side. surface 670, and the electronic photosensitive element 680 is arranged on the imaging surface 670 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (610-650), and the first lens 610, the second lens 620, Among the third lens 630 , the fourth lens 640 and the fifth lens 650 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 610 has positive refractive power and is made of plastic material. The object-side surface 611 is convex, and the image-side surface 612 is convex, both of which are aspherical. In addition, the object-side surface 611 of the first lens has at least one inflection point.

The second lens 620 has negative refractive power and is made of plastic material. The object-side surface 621 is concave, and the image-side surface 622 is concave, both of which are aspherical. In addition, both the object-side surface 621 and the image-side surface 622 of the second lens have at least one inflection point.

The third lens 630 has negative refractive power and is made of plastic material. The object-side surface 631 is concave, and the image-side surface 632 is convex, both of which are aspherical. In addition, the image-side surface 632 of the third lens has at least one inflection point.

The fourth lens 640 has negative refractive power and is made of plastic material. The object-side surface 641 is concave, and the image-side surface 642 is concave, both of which are aspherical.

The fifth lens 650 has negative refractive power and is made of plastic material. The object-side surface 651 is concave, and the image-side surface 652 is convex, both of which are aspherical.

In addition, among the refractive powers of the first lens 610 , the second lens 620 , the third lens 630 , the fourth lens 640 and the fifth lens 650 , the refractive power of the first lens 610 is the strongest.

The infrared filter element 660 is made of glass, and it is disposed between the fifth lens 650 and the imaging surface 670 and does not affect the focal length of the imaging lens group.

Then refer to Table 11 and Table 12 below.

In the sixth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 11 and Table 12, the following data can be calculated:

Moreover, it can be known from the above Table 11 that in the sixth embodiment, the distance between the first lens 610 and the second lens 620 on the optical axis is T12, and the distance between the second lens 620 and the third lens 630 on the optical axis is The distance is T23, the distance between the third lens 630 and the fourth lens 640 on the optical axis is T34, the distance between the fourth lens 640 and the fifth lens 650 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34 .

<Seventh Embodiment>

Please refer to FIG. 13 and FIG. 14, wherein FIG. 13 shows a schematic diagram of an imaging device according to the seventh embodiment of the present invention, and FIG. 14 shows the spherical aberration, astigmatism and distortion of the seventh embodiment in sequence from left to right Graph. As can be seen from FIG. 13 , the imaging device of the seventh embodiment includes an imaging lens group (not otherwise labeled) and an electronic photosensitive element 780 . The imaging lens group includes the first lens 710, the second lens 720, the aperture 700, the third lens 730, the fourth lens 740, the fifth lens 750, the infrared filter element 760 and the imaging lens in order from the object side to the image side. surface 770, and the electronic photosensitive element 780 is arranged on the imaging surface 770 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (710-750), and the first lens 710, the second lens 720, Among the third lens 730 , the fourth lens 740 and the fifth lens 750 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 710 has positive refractive power and is made of plastic material. The object-side surface 711 is convex, and the image-side surface 712 is convex, both of which are aspherical. In addition, the object-side surface 711 of the first lens has at least one inflection point.

The second lens 720 has positive refractive power and is made of plastic material. The object-side surface 721 is concave, and the image-side surface 722 is convex, both of which are aspherical. In addition, both the object-side surface 721 and the image-side surface 722 of the second lens have at least one inflection point.

The third lens 730 has negative refractive power and is made of plastic material. The object-side surface 731 is concave, and the image-side surface 732 is convex, both of which are aspherical. In addition, the image-side surface 732 of the third lens has at least one inflection point.

The fourth lens 740 has negative refractive power and is made of plastic material. The object-side surface 741 is convex, and the image-side surface 742 is concave, both of which are aspherical. In addition, the object-side surface 741 of the fourth lens has at least one inflection point.

The fifth lens 750 has negative refractive power and is made of plastic material. The object-side surface 751 is concave, and the image-side surface 752 is convex, both of which are aspherical. In addition, the object-side surface 751 of the fifth lens has at least one inflection point.

In addition, among the refractive powers of the first lens 710 , the second lens 720 , the third lens 730 , the fourth lens 740 and the fifth lens 750 , the refractive power of the first lens 710 is the strongest.

The infrared filter element 760 is made of glass, and it is disposed between the fifth lens 750 and the imaging surface 770 and does not affect the focal length of the imaging lens group.

Then refer to Table 13 and Table 14 below.

In the seventh embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 13 and Table 14, the following data can be calculated:

In addition, it can be seen from Table 13 above that in the seventh embodiment, the second lens 720 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be known from Table 13 above that in the seventh embodiment, the distance between the first lens 710 and the second lens 720 on the optical axis is T12, and the distance between the second lens 720 and the third lens 730 on the optical axis is The distance is T23, the distance between the third lens 730 and the fourth lens 740 on the optical axis is T34, the distance between the fourth lens 740 and the fifth lens 750 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34 .

<Eighth embodiment>

Please refer to FIG. 15 and FIG. 16, wherein FIG. 15 shows a schematic diagram of an imaging device according to the eighth embodiment of the present invention, and FIG. 16 shows the spherical aberration, astigmatism and distortion of the eighth embodiment in order from left to right Graph. It can be seen from FIG. 15 that the image capturing device of the eighth embodiment includes an image capturing lens group (not another number) and an electronic photosensitive element 880 . The imaging lens group includes a first lens 810, an aperture 800, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, an infrared filter element 860 and an imaging lens in sequence from the object side to the image side. surface 870, and the electronic photosensitive element 880 is arranged on the imaging surface 870 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (810-850), and the first lens 810, the second lens 820, Among the third lens 830 , the fourth lens 840 and the fifth lens 850 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 810 has positive refractive power and is made of plastic material. The object-side surface 811 is convex, and the image-side surface 812 is convex, both of which are aspherical. In addition, the object-side surface 811 of the first lens has at least one inflection point.

The second lens 820 has negative refractive power and is made of plastic material. The object-side surface 821 is concave, and the image-side surface 822 is concave, both of which are aspherical. In addition, the object-side surface 821 of the second lens has at least one inflection point.

The third lens 830 has a positive refractive power and is made of plastic material. The object-side surface 831 is convex, and the image-side surface 832 is concave, both of which are aspherical. In addition, the image-side surface 832 of the third lens has at least one inflection point.

The fourth lens 840 has negative refractive power and is made of plastic material. The object-side surface 841 is concave, and the image-side surface 842 is convex, both of which are aspherical. In addition, both the object-side surface 841 and the image-side surface 842 of the fourth lens have at least one inflection point.

The fifth lens 850 has negative refractive power and is made of plastic material. The object-side surface 851 is concave, and the image-side surface 852 is concave, both of which are aspherical. In addition, both the object-side surface 851 and the image-side surface 852 of the fifth lens have at least one inflection point.

In addition, among the refractive powers of the first lens 810 , the second lens 820 , the third lens 830 , the fourth lens 840 and the fifth lens 850 , the refractive power of the first lens 810 is the strongest.

The infrared filter element 860 is made of glass, and it is disposed between the fifth lens 850 and the imaging surface 870 without affecting the focal length of the imaging lens group.

Then refer to Table 15 and Table 16 below.

In the eighth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 15 and Table 16, the following data can be calculated:

In addition, it can be seen from Table 15 above that in the eighth embodiment, the third lens 830 has positive refractive power and its dispersion coefficient is less than 30.

<Ninth Embodiment>

Please refer to FIG. 17 and FIG. 18 , wherein FIG. 17 shows a schematic diagram of an imaging device according to the ninth embodiment of the present invention, and FIG. 18 shows the spherical aberration, astigmatism and distortion of the ninth embodiment in sequence from left to right Graph. As can be seen from FIG. 17 , the image capturing device of the ninth embodiment includes an image capturing lens group (not otherwise labeled) and an electronic photosensitive element 980 . The imaging lens group includes a first lens 910, an aperture 900, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, an infrared filter element 960 and an imaging lens in sequence from the object side to the image side. surface 970, and the electronic photosensitive element 980 is arranged on the imaging surface 970 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (910-950), and the first lens 910, the second lens 920, Among the third lens 930 , the fourth lens 940 and the fifth lens 950 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 910 has a positive refractive power and is made of plastic material. The object-side surface 911 is convex, and the image-side surface 912 is convex, both of which are aspherical. In addition, the object-side surface 911 of the first lens has at least one inflection point.

The second lens 920 has negative refractive power and is made of plastic material. The object-side surface 921 is concave, and the image-side surface 922 is concave, both of which are aspherical. In addition, the object-side surface 921 of the second lens has at least one inflection point.

The third lens 930 has positive refractive power and is made of plastic material. The object-side surface 931 is convex, and the image-side surface 932 is convex, both of which are aspherical. In addition, both the object-side surface 931 and the image-side surface 932 of the third lens have at least one inflection point.

The fourth lens 940 has negative refractive power and is made of plastic material. The object-side surface 941 is concave, and the image-side surface 942 is concave, both of which are aspherical. In addition, the object-side surface 941 of the fourth lens has at least one inflection point.

The fifth lens 950 has negative refractive power and is made of plastic material. The object-side surface 951 is concave, and the image-side surface 952 is convex, both of which are aspherical. In addition, both the object-side surface 951 and the image-side surface 952 of the fifth lens have at least one inflection point.

In addition, among the refractive powers of the first lens 910 , the second lens 920 , the third lens 930 , the fourth lens 940 and the fifth lens 950 , the refractive power of the first lens 910 is the strongest.

The infrared filter element 960 is made of glass, and it is disposed between the fifth lens 950 and the imaging surface 970 and does not affect the focal length of the imaging lens group.

Then refer to Table 17 and Table 18 below.

In the ninth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 17 and Table 18, the following data can be calculated:

In addition, it can be known from the above Table 17 that in the ninth embodiment, the third lens 930 has a positive refractive power and its dispersion coefficient is less than 30.

Moreover, it can be seen from the above Table 17 that in the ninth embodiment, the distance between the first lens 910 and the second lens 920 on the optical axis is T12, and the distance between the second lens 920 and the third lens 930 on the optical axis is The distance is T23, the distance between the third lens 930 and the fourth lens 940 on the optical axis is T34, the distance between the fourth lens 940 and the fifth lens 950 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34 .

<Tenth Embodiment>

Please refer to Fig. 19 and Fig. 20, wherein Fig. 19 shows a schematic diagram of an imaging device according to the tenth embodiment of the present invention, and Fig. 20 shows the spherical aberration, astigmatism and distortion of the tenth embodiment in order from left to right Graph. As can be seen from FIG. 19 , the imaging device of the tenth embodiment includes an imaging lens group (not labeled separately) and an electronic photosensitive element 1080 . The imaging lens group includes a first lens 1010, an aperture 1000, a second lens 1020, a third lens 1030, a diaphragm 1001, a fourth lens 1040, a fifth lens 1050, and an infrared filter from the object side to the image side. element 1060 and imaging surface 1070, and the electronic photosensitive element 1080 is arranged on the imaging surface 1070 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (1010-1050), and the first lens 1010, the second lens Among the second lens 1020 , the third lens 1030 , the fourth lens 1040 and the fifth lens 1050 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 1010 has positive refractive power and is made of plastic material. The object-side surface 1011 is convex, and the image-side surface 1012 is convex, both of which are aspherical. In addition, the object-side surface 1011 of the first lens has at least one inflection point.

The second lens 1020 has negative refractive power and is made of plastic material. The object-side surface 1021 is concave, and the image-side surface 1022 is concave, both of which are aspherical. In addition, the object-side surface 1021 of the second lens has at least one inflection point.

The third lens 1030 has positive refractive power and is made of plastic material. The object-side surface 1031 is convex, and the image-side surface 1032 is convex, both of which are aspherical. In addition, the image-side surface 1032 of the third lens has at least one inflection point.

The fourth lens 1040 has negative refractive power and is made of plastic material. The object-side surface 1041 is concave, and the image-side surface 1042 is concave, both of which are aspherical. In addition, the image-side surface 1042 of the fourth lens has at least one inflection point.

The fifth lens 1050 has negative refractive power and is made of plastic material. The object-side surface 1051 is concave, and the image-side surface 1052 is concave, both of which are aspherical. In addition, both the object-side surface 1051 and the image-side surface 1052 of the fifth lens have at least one inflection point.

In addition, among the refractive powers of the first lens 1010 , the second lens 1020 , the third lens 1030 , the fourth lens 1040 and the fifth lens 1050 , the refractive power of the first lens 1010 is the strongest.

The infrared filtering element 1060 is made of glass, and is disposed between the fifth lens 1050 and the imaging surface 1070, and does not affect the focal length of the imaging lens group.

Then refer to Table 19 and Table 20 below.

In the tenth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 19 and Table 20, the following data can be calculated:

In addition, it can be seen from Table 19 above that in the tenth embodiment, the third lens 1030 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be known from the above Table 19 that in the tenth embodiment, the distance between the first lens 1010 and the second lens 1020 on the optical axis is T12, and the distance between the second lens 1020 and the third lens 1030 on the optical axis is The distance is T23, the distance between the third lens 1030 and the fourth lens 1040 on the optical axis is T34, the distance between the fourth lens 1040 and the fifth lens 1050 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34 .

<Eleventh embodiment>

Please refer to Figure 21 and Figure 22, wherein Figure 21 shows a schematic diagram of an imaging device according to the eleventh embodiment of the present invention, and Figure 22 shows the spherical aberration and astigmatism of the eleventh embodiment in order from left to right and distorted graphs. As can be seen from FIG. 21 , the imaging device of the eleventh embodiment includes an imaging lens group (not labeled separately) and an electronic photosensitive element 1180 . The imaging lens group includes a first lens 1110, an aperture 1100, a second lens 1120, a third lens 1130, a fourth lens 1140, a fifth lens 1150, an infrared filter element 1160 and an imaging lens in sequence from the object side to the image side. surface 1170, and the electronic photosensitive element 1180 is arranged on the imaging surface 1170 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (1110-1150), and the first lens 1110, the second lens 1120, Among the third lens 1130 , the fourth lens 1140 and the fifth lens 1150 , any two adjacent lenses have an air space on the optical axis.

The first lens 1110 has a positive refractive power and is made of plastic material. The object-side surface 1111 is convex, and the image-side surface 1112 is concave, both of which are aspherical. In addition, both the object-side surface 1111 and the image-side surface 1112 of the first lens have at least one inflection point.

The second lens 1120 has a negative refractive power and is made of plastic material. The object-side surface 1121 is convex, and the image-side surface 1122 is concave, both of which are aspherical.

The third lens 1130 has positive refractive power and is made of plastic material. The object-side surface 1131 is concave, and the image-side surface 1132 is convex, both of which are aspherical. In addition, the object-side surface 1131 of the third lens has at least one inflection point.

The fourth lens 1140 has negative refractive power and is made of plastic material. The object-side surface 1141 is concave, and the image-side surface 1142 is concave, both of which are aspherical. In addition, the image-side surface 1142 of the fourth lens has at least one inflection point.

The fifth lens 1150 has negative refractive power and is made of plastic material. The object-side surface 1151 is concave, and the image-side surface 1152 is convex, both of which are aspherical.

In addition, among the refractive powers of the first lens 1110 , the second lens 1120 , the third lens 1130 , the fourth lens 1140 and the fifth lens 1150 , the refractive power of the first lens 1110 is the strongest.

The infrared filter element 1160 is made of glass, and is disposed between the fifth lens 1150 and the imaging surface 1170 without affecting the focal length of the imaging lens group.

Then refer to the following Table 21 and Table 22.

In the eleventh embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Combined with Table 21 and Table 22, the following data can be calculated:

In addition, it can be known from the above Table 21 that in the eleventh embodiment, the third lens 1130 has positive refractive power and its dispersion coefficient is less than 30.

Furthermore, it can be known from the above Table 21 that in the eleventh embodiment, the distance between the first lens 1110 and the second lens 1120 on the optical axis is T12, and the second lens 1120 and the third lens 1130 are on the optical axis The distance between the third lens 1130 and the fourth lens 1140 on the optical axis is T34, the distance between the fourth lens 1140 and the fifth lens 1150 on the optical axis is T45, wherein T45 is greater than T12, T23 and T34.

<Twelfth embodiment>

Please refer to FIG. 23 and FIG. 24, wherein FIG. 23 shows a schematic diagram of an imaging device according to the twelfth embodiment of the present invention, and FIG. 24 shows the spherical aberration and astigmatism of the twelfth embodiment from left to right. and distorted graphs. As can be seen from FIG. 23 , the imaging device of the twelfth embodiment includes an imaging lens group (not otherwise labeled) and an electronic photosensitive element 1280 . The imaging lens group includes a first lens 1210, an aperture 1200, a second lens 1220, a third lens 1230, a fourth lens 1240, a fifth lens 1250, an infrared filter element 1260 and an imaging lens in sequence from the object side to the image side. surface 1270, and the electronic photosensitive element 1280 is arranged on the imaging surface 1270 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (1210-1250), and the first lens 1210, the second lens 1220, Among the third lens 1230 , the fourth lens 1240 and the fifth lens 1250 , any two adjacent lenses have an air space on the optical axis.

The first lens 1210 has positive refractive power and is made of plastic material. The object-side surface 1211 is convex, and the image-side surface 1212 is concave, both of which are aspherical. In addition, both the object-side surface 1211 and the image-side surface 1212 of the first lens have at least one inflection point.

The second lens 1220 has negative refractive power and is made of plastic material. The object-side surface 1221 is convex, and the image-side surface 1222 is concave, both of which are aspherical.

The third lens 1230 has negative refractive power and is made of plastic material. The object-side surface 1231 is convex, and the image-side surface 1232 is concave, both of which are aspherical. In addition, both the object-side surface 1231 and the image-side surface 1232 of the third lens have at least one inflection point.

The fourth lens 1240 has negative refractive power and is made of plastic material. The object-side surface 1241 is concave, and the image-side surface 1242 is concave, both of which are aspherical. In addition, both the object-side surface 1241 and the image-side surface 1242 of the fourth lens have at least one inflection point.

The fifth lens 1250 has negative refractive power and is made of plastic material. The object-side surface 1251 is concave, and the image-side surface 1252 is convex, both of which are aspherical.

In addition, among the refractive powers of the first lens 1210 , the second lens 1220 , the third lens 1230 , the fourth lens 1240 and the fifth lens 1250 , the refractive power of the first lens 1210 is the strongest.

The infrared filter element 1260 is made of glass, and is disposed between the fifth lens 1250 and the imaging surface 1270, and does not affect the focal length of the imaging lens group.

Then refer to Table 23 and Table 24 below.

In the twelfth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Combined with Table 23 and Table 24, the following data can be calculated:

Furthermore, it can be seen from the above Table 23 that in the twelfth embodiment, the distance between the first lens 1210 and the second lens 1220 on the optical axis is T12, and the second lens 1220 and the third lens 1230 are on the optical axis The distance between the third lens 1230 and the fourth lens 1240 on the optical axis is T34, the distance between the fourth lens 1240 and the fifth lens 1250 on the optical axis is T45, wherein T45 is greater than T12 and T23 and T34.

<Thirteenth embodiment>

Please refer to Figure 25 and Figure 26, wherein Figure 25 shows a schematic diagram of an imaging device according to the thirteenth embodiment of the present invention, and Figure 26 shows the spherical aberration and astigmatism of the thirteenth embodiment from left to right and distorted graphs. As can be seen from FIG. 25 , the imaging device of the thirteenth embodiment includes an imaging lens group (not another number) and an electronic photosensitive element 1380 . The imaging lens group sequentially includes an aperture 1300, a first lens 1310, a second lens 1320, a third lens 1330, a fourth lens 1340, a fifth lens 1350, an infrared filter element 1360 and an imaging lens from the object side to the image side. surface 1370, and the electronic photosensitive element 1380 is arranged on the imaging surface 1370 of the imaging lens group, wherein the total number of lenses with refractive power in the imaging lens group is five pieces (1310-1350), and the first lens 1310, the second lens 1320, Among the third lens 1330 , the fourth lens 1340 and the fifth lens 1350 , there is an air space between any two adjacent lenses on the optical axis.

The first lens 1310 has positive refractive power and is made of plastic material. The object-side surface 1311 is convex, and the image-side surface 1312 is convex, both of which are aspherical.

The second lens 1320 has negative refractive power and is made of plastic material. The object-side surface 1321 is concave, and the image-side surface 1322 is concave, both of which are aspherical. In addition, the object-side surface 1321 of the second lens has at least one inflection point.

The third lens 1330 has positive refractive power and is made of plastic material. The object-side surface 1331 is concave, and the image-side surface 1332 is convex, both of which are aspherical. In addition, the object-side surface 1331 of the third lens has at least one inflection point.

The fourth lens 1340 has negative refractive power and is made of plastic material. The object-side surface 1341 is concave, and the image-side surface 1342 is convex, both of which are aspherical. In addition, the image-side surface 1342 of the fourth lens has at least one inflection point.

The fifth lens 1350 has negative refractive power and is made of plastic material. The object-side surface 1351 is concave, and the image-side surface 1352 is convex, both of which are aspherical. In addition, the image-side surface 1352 of the fifth lens has at least one inflection point.

In addition, among the refractive powers of the first lens 1310 , the second lens 1320 , the third lens 1330 , the fourth lens 1340 and the fifth lens 1350 , the refractive power of the first lens 1310 is the strongest.

The infrared filtering element 1360 is made of glass, and is disposed between the fifth lens 1350 and the imaging surface 1370 without affecting the focal length of the imaging lens group.

Then refer to the following Table 25 and Table 26.

In the thirteenth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 25 and Table 26, the following data can be calculated:

In addition, it can be known from the above Table 25 that in the thirteenth embodiment, the third lens 1330 has a positive refractive power, and its dispersion coefficient is less than 30.

Furthermore, it can be seen from the above Table 25 that in the thirteenth embodiment, the distance between the first lens 1310 and the second lens 1320 on the optical axis is T12, and the second lens 1320 and the third lens 1330 are on the optical axis The distance between the third lens 1330 and the fourth lens 1340 on the optical axis is T34, the distance between the fourth lens 1340 and the fifth lens 1350 on the optical axis is T45, wherein T45 is greater than T12 and T23 and T34.

<Fourteenth embodiment>

Please refer to FIG. 29 , which is a schematic diagram illustrating an electronic device 10 according to a fourteenth embodiment of the present invention. The electronic device 10 of the fourteenth embodiment is a smart phone. The electronic device 10 includes an imaging device 11, and the imaging device 11 includes an imaging lens group (not shown) and an electronic photosensitive element (not shown) according to the present invention. , wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens group, and the imaging device 11 may further include a prism (not shown in the figure).

<Fifteenth embodiment>

Please refer to FIG. 30 , which is a schematic diagram illustrating an electronic device 20 according to a fifteenth embodiment of the present invention. The electronic device 20 of the fifteenth embodiment is a tablet computer. The electronic device 20 includes an imaging device 21, and the imaging device 21 includes an imaging lens group (not shown) and an electronic photosensitive element (not shown) according to the present invention. , wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens group, and the imaging device 21 may further include a prism (not shown in the figure).

<Sixteenth embodiment>

Please refer to FIG. 31 , which is a schematic diagram illustrating an electronic device 30 according to a sixteenth embodiment of the present invention. The electronic device 30 of the sixteenth embodiment is a head-mounted display (Head-mounted display, HMD). The electronic device 30 includes an imaging device 31, and the imaging device 31 includes an imaging lens group according to the present invention (not disclosed in the figure). ) and an electronic photosensitive element (not shown in the figure), wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens group, and the image capturing device 31 may further include a prism (not shown in the figure).

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be based on the scope defined by the appended claims.

Claims (30)

1. a sampling image lens group, it is characterised in that sequentially comprised to image side by thing side:

One first lens, have positive refracting power, and its thing side surface is convex surface；

One second lens, have refracting power；

One the 3rd lens, have refracting power, and its thing side surface and surface, image side are all aspheric surface；

One the 4th lens, have negative refracting power, and its thing side surface and surface, image side are all aspheric surface；And

One the 5th lens, have negative refracting power, and its thing side surface is concave surface, its thing side surface and surface, image side It is all aspheric surface；

Wherein, it is five that this sampling image lens group has the lens sum of refracting power, the focal length of this sampling image lens group For f, the focal length of these the first lens is f1, and the focal length of the 4th lens is f4, this first lens thing side surface Radius of curvature be R1, the radius of curvature on this surface, the first lens image side is R2, and these first lens are in optical axis On thickness be CT1, it meets following condition:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5；

-1.0<f1/f4<0；And

3.4<f/R1。

Sampling image lens group the most according to claim 1, it is characterised in that these second lens have negative Refracting power.

Sampling image lens group the most according to claim 2, it is characterised in that the 3rd lens just have Refracting power.

Sampling image lens group the most according to claim 2, it is characterised in that the 3rd lens image side table Face is convex surface.

Sampling image lens group the most according to claim 1, it is characterised in that also comprise:

One aperture, wherein to the 5th surface, lens image side, the distance on optical axis is SD to this aperture, and this is years old The one lens thing side surface to the 5th surface, lens image side distance on optical axis is TD, and it meets following bar Part:

0.65<SD/TD<1.0。

Sampling image lens group the most according to claim 5, it is characterised in that this aperture be arranged at this Between one lens and the 3rd lens, this aperture to the 5th surface, lens image side distance on optical axis is SD, To the 5th surface, lens image side, the distance on optical axis is TD to this first lens thing side surface, under it meets Row condition:

0.65<SD/TD<0.87。

Sampling image lens group the most according to claim 5, it is characterised in that the 4th lens thing side table Face is concave surface.

Sampling image lens group the most according to claim 5, it is characterised in that the 5th lens image side table Face is convex surface.

Sampling image lens group the most according to claim 1, it is characterised in that the 4th lens image side table The radius of curvature in face is R8, and the radius of curvature of the 5th lens thing side surface is R9, and it meets following condition:

-0.1<(R8+R9)/(R8-R9)。

Sampling image lens group the most according to claim 1, it is characterised in that this first lens thing side table The radius of curvature in face is R1, and the radius of curvature on this surface, the first lens image side is R2, and it meets following condition:

-1.5<(R1+R2)/(R1-R2)<0。

11. sampling image lens groups according to claim 1, it is characterised in that the refraction of these the first lens Rate is N1, and the refractive index of these the second lens is N2, and the refractive index of the 3rd lens is N3, and the 4th is saturating The refractive index of mirror is N4, and the refractive index of the 5th lens is N5, in N1, N2, N3, N4 and N5 Big person is Nmax, and it meets following condition:

1.50<Nmax<1.70。

12. sampling image lens groups according to claim 1, it is characterised in that these first lens, this Two lens, the 3rd lens, the 4th lens have positive refracting power with at least one lens in the 5th lens, And this has the abbe number of positive refracting power lens less than 30.

13. sampling image lens groups according to claim 1, it is characterised in that these first lens with this Two lens spacing distance on optical axis is T12, these second lens and the 3rd lens interval on optical axis Distance is T23, and the 3rd lens and the 4th lens spacing distance on optical axis are T34, and the 4th is saturating Mirror and the 5th lens spacing distance on optical axis are T45, and T45 is more than T12, T23 and T34.

14. sampling image lens groups according to claim 1, it is characterised in that Jiao of this sampling image lens group Away from for f, the maximum image height of this sampling image lens group is ImgH, and it meets following condition:

2.3<f/ImgH<6.0。

15. sampling image lens groups according to claim 1, it is characterised in that entering of this sampling image lens group Penetrating a diameter of EPD of pupil, the maximum image height of this sampling image lens group is ImgH, and it meets following condition:

0.7<EPD/ImgH<2.0。

16. sampling image lens groups according to claim 1, it is characterised in that these first lens, this Two lens, the 3rd lens, the 4th lens comprise at least one contrary flexure with at least one lens in the 5th lens Point, the focal length of this sampling image lens group is f, this first lens thing side surface a to imaging surface on optical axis away from From for TL, it meets following condition:

0.75<TL/f<1.0。

17. sampling image lens groups according to claim 1, it is characterised in that these first lens to this Five lens all has an airspace between wantonly two adjacent lens on optical axis, this first lens thing side surface Being TL to imaging surface distance on optical axis, it meets following condition:

TL<7.5mm。

18. 1 kinds of image-taking devices, it is characterised in that comprise:

Sampling image lens group as claimed in claim 1；And

One sense electronics optical element, it is arranged at an imaging surface of this sampling image lens group.

19. 1 kinds of image-taking devices, it is characterised in that comprise:

Sampling image lens group as claimed in claim 1；

One prism, it is arranged in the light path between an object and an imaging surface of this sampling image lens group； And

One sense electronics optical element, it is arranged at this imaging surface of this sampling image lens group.

20. 1 kinds of electronic installations, it is characterised in that comprise:

Image-taking device as claimed in claim 18.

21. 1 kinds of sampling image lens groups, it is characterised in that sequentially comprised to image side by thing side:

One first lens, have positive refracting power, and its thing side surface is convex surface；

One second lens, have refracting power；

One the 3rd lens, have refracting power, and its thing side surface and surface, image side are all aspheric surface；

One the 4th lens, have negative refracting power, and its surface, image side is concave surface, its thing side surface and surface, image side It is all aspheric surface；And

One the 5th lens, have negative refracting power, and its thing side surface and surface, image side are all aspheric surface；

Wherein, it is five that this sampling image lens group has the lens sum of refracting power, the focal length of this sampling image lens group For f, the focal length of these the first lens is f1, and the focal length of the 4th lens is f4, this first lens thing side surface Radius of curvature be R1, the radius of curvature on this surface, the first lens image side is R2, and these first lens are in optical axis On thickness be CT1, it meets following condition:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5；

-1.0<f1/f4<0；And

3.4<f/R1。

22. sampling image lens groups according to claim 21, it is characterised in that this first lens image side Surface is convex surface, and these second lens have negative refracting power.

23. sampling image lens groups according to claim 21, it is characterised in that these first lens are to being somebody's turn to do 5th lens all have between wantonly two adjacent lens on optical axis an airspace, and these first lens, should In the refracting power of the second lens, the 3rd lens, the 4th lens and the 5th lens, these the first lens Refracting power is the strongest.

24. sampling image lens groups according to claim 21, it is characterised in that this sampling image lens group The a diameter of EPD of entrance pupil, the maximum image height of this sampling image lens group is ImgH, and the focal length of the 4th lens is F4, the focal length of the 5th lens is f5, and it meets following condition:

0.7<EPD/ImgH<2.0；And

0<f4/f5。

25. sampling image lens groups according to claim 21, it is characterised in that this sampling image lens group Focal length is f, and the radius of curvature of this first lens thing side surface is R1, the curvature on this surface, the first lens image side Radius is R2, and this first lens thickness on optical axis is CT1, and it meets following condition:

3.7<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<6.0。

26. sampling image lens groups according to claim 21, it is characterised in that the 3rd lens with should 4th lens spacing distance on optical axis is T34, between the 4th lens and the 5th lens are on optical axis Spacing from for T45, it meets following condition:

T34/T45<1.2。

27. sampling image lens groups according to claim 21, it is characterised in that these first lens, should Second lens, the 3rd lens, the 4th lens and the 5th lens are all plastic cement material, and this is first saturating Mirror thing side surface is TL to imaging surface distance on optical axis, and the maximum image height of this sampling image lens group is ImgH, it meets following condition:

2.0<TL/ImgH<3.5。

28. sampling image lens groups according to claim 21, it is characterised in that the color of the 4th lens Scattered coefficient is V4, and the abbe number of the 5th lens is V5, and it meets following condition:

90<V4+V5<130。

29. sampling image lens groups according to claim 21, it is characterised in that in this sampling image lens group The half at maximum visual angle is HFOV, and it meets following condition:

0.3<tan(2×HFOV)<1.1。

30. sampling image lens groups according to claim 21, it is characterised in that these first lens with should The synthesis focal length of the second lens is f12, and the 4th lens are f45 with the synthesis focal length of the 5th lens, its Meet following condition:

-2.0<f12/f45<0。