WO2014203675A1 - Système optique d'imagerie à œil à facettes et dispositif d'imagerie à œil à facettes - Google Patents

Système optique d'imagerie à œil à facettes et dispositif d'imagerie à œil à facettes Download PDF

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Publication number
WO2014203675A1
WO2014203675A1 PCT/JP2014/063541 JP2014063541W WO2014203675A1 WO 2014203675 A1 WO2014203675 A1 WO 2014203675A1 JP 2014063541 W JP2014063541 W JP 2014063541W WO 2014203675 A1 WO2014203675 A1 WO 2014203675A1
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Prior art keywords
lens
imaging optical
eye imaging
optical system
compound
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English (en)
Japanese (ja)
Inventor
潤 太田
一生 松井
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Konica Minolta Inc
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Konica Minolta Inc
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/40—Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled
    • H04N25/41—Extracting pixel data from a plurality of image sensors simultaneously picking up an image, e.g. for increasing the field of view by combining the outputs of a plurality of sensors

Definitions

  • the present invention relates to a compound eye imaging apparatus that forms an object image using a lens array composed of a plurality of lenses and a compound eye imaging optical system used therefor.
  • imaging devices have been mounted on thin smartphones, etc., but there has been a great demand for thin imaging optical systems, and so far it has been manufactured to reduce overall length and increase error sensitivity associated with optical design. This has been addressed by improving accuracy.
  • further thinning ultra-thinning
  • the imaging area is divided and one set of optical systems (single-eye imaging optical system) is arranged in each imaging area, so that the optical total length is significantly larger than before.
  • a compound-eye imaging device In such a compound-eye imaging device, the same subject is photographed by a plurality of single-eye imaging optical systems, and a plurality of low-resolution images output from the imaging device are synthesized by image processing, thereby outputting one high-resolution image.
  • a so-called super-resolution technique can be used, whereby a high-resolution image can be obtained while realizing a significantly lower profile than that of an existing optical system.
  • Such a compound-eye imaging optical system has a small imaging area in which one single-lens imaging optical system forms an object image and has a low number of pixels, but each single-lens imaging optical system has a smaller number of pixels than conventional imaging optical systems.
  • High optical performance is required.
  • Patent Document 1 discloses a compound-eye imaging optical system having a plurality of individual lenses that differ for each wavelength component of a subject.
  • the compound-eye imaging optical system described in Patent Document 1 is composed of one lens array, even if a single lens is designed for each wavelength component, aberration correction is performed with a single lens. Is insufficient, and it is difficult to achieve the required optical performance.
  • the single-eye imaging optical system is formed from a plurality of lenses stacked in the optical axis direction
  • the degree of freedom of aberration correction increases and it becomes easy to form a high-quality image.
  • forming the compound-eye imaging optical system by arranging them in the direction perpendicular to the optical axis increases the labor of assembly. Therefore, by laminating a lens array in which a plurality of lenses (single-lens lenses) are integrally formed in the optical axis direction, a plurality of single-eye imaging optical systems composed of the laminated single-lens lenses are formed at a time. There is an attempt to do.
  • a lens array in which a plurality of single-lens lenses are formed integrally has the advantage that the performance variation of each lens in the lens array can be reduced, and the number of incorporation and formation can be reduced to reduce the cost.
  • the compound-eye imaging optical system is composed of two or more lens arrays.
  • tilting and warping of the lens array is one problem. This problem will be described.
  • subject light beams LB1, LB2, and LB3 are incident on the single-eye imaging optical systems IL1, IL2, and IL3 of the compound-eye imaging optical system having the first lens array LA1 and the second lens array LA2, respectively.
  • the imaging plane I becomes the focus position as indicated by the dotted line for the subject lights LB1, LB2, and LB3.
  • Each of the subject images is appropriately formed.
  • the first lens array LA1 is used as a reference and the second lens array LA2 is displaced from the reference position. That is, when the second lens array LA2 is translated from the dotted line to the position indicated by the solid line, the focus position is shifted as indicated by the solid line, but if the relative position between the compound-eye imaging optical system and the imaging surface I is displaced and adjusted, Since all the focus positions are on the imaging surface I, there are few problems.
  • Patent Document 2 discloses a compound-eye imaging optical system unit in which a plurality of lens arrays are stacked.
  • a compound-eye imaging optical system unit in which a plurality of lens arrays are stacked.
  • the present invention has been made in view of such problems, and in a compound eye imaging optical system having an ultra-low profile and high image quality, the lens interval is different for each single-eye imaging optical system due to the tilt and warp of the lens array. Even if there is a change, it is possible to suppress deterioration in the image quality of the reconstructed image due to variations in the amount of change in image plane position between single-eye imaging optical systems, and a compound eye image pickup optical system that has a small amount of change in image plane position relative to lens spacing changes. And it aims at providing the compound eye imaging device using the same.
  • a compound eye imaging optical system reflecting one aspect of the present invention is a compound eye imaging optical system that forms a plurality of object images on an imaging surface of an imaging element.
  • the compound-eye imaging optical system includes, in order from the object side, a first lens array and a second lens array group having at least one lens array, and each lens array is formed by integrally forming a plurality of individual lenses.
  • a plurality of single-lens imaging optical systems are formed by laminating the single-lens lenses of the first lens array and the second lens array group in the optical axis direction, and a plurality of object images are formed by the plurality of single-eye imaging optical systems.
  • f Total focal length (mm) of the single-eye imaging optical system
  • f2 Focal length of the second lens group (if the second lens array group consists of a single lens array, this is the focal length of the single lens of the lens array, and the second lens array group In the case of two or more lens arrays, it means the combined focal length of two or more single-lens lenses stacked in the optical axis direction in each lens array) (mm) The focal length is calculated at the design center wavelength of each single-eye imaging optical system.
  • the present inventor has studied an optical system in which the amount of change in focus position (the amount of change in image plane position) with respect to the change in lens interval is small.
  • the distance between the axes of the first single-lens lens L1 having a focal length of f1 and the second single-eye lens L2 having a focal length of f2 is defined as d.
  • the focus position is considered as a distance fB from the final lens surface to the focal position, counting in order from the object side.
  • the distance between the axes of the first eye lens L1 and the second eye lens L2 is changed by t as shown in FIG. Even if the change in the distance between the axes occurs, the change amount d (fB) / dt of fB with respect to t may be small in order to suppress the change amount of the focus position.
  • d (fB) / dt changes in a parabolic shape with respect to f2 and has an extreme value, so that the value of d (fB) / dt can be kept small within a certain f2 range. That is, it can be seen that the amount of change in fB can be suppressed even if t changes.
  • FIG. 3 is a graph plotting the value of equation (10) with f / f2 on the horizontal axis and d (fB) / dt on the vertical axis. It is ideal to set d (fB) / dt to 0, but it is not always necessary to set it to 0, and an image that is practically inconspicuous can be obtained by suppressing it to ⁇ 2.0 or more. At this time, the range of f / f2 is ⁇ 0.6 to 2.
  • this compound-eye imaging optical system by changing the focal length of the second single-lens lens group so as to satisfy the conditional expression (1), the imaging plane position variation with respect to the lens interval change of each single-eye imaging optical system is reduced. It is possible to reduce the size, and the performance variation between the single-eye imaging optical systems can be reduced. More specifically, when the value of the conditional expression (1) is less than the upper limit value and the second lens unit has a positive refractive power (f / f2> 0), imaging with respect to a change in the lens interval is performed. Surface position variation can be suppressed, and a reconstructed image with good image quality can be obtained.
  • conditional expression (1) exceeds the lower limit, when the second lens unit has a negative refractive power (f / f2 ⁇ 0), the image plane position variation with respect to the change in the lens interval is reduced. Therefore, a reconstructed image with good image quality can be obtained.
  • This compound-eye imaging device has the above-described compound-eye imaging optical system.
  • the image quality of the reconstructed image is deteriorated due to variation in the image plane position change amount between the single-lens imaging optical systems. It is possible to provide a compound-eye imaging optical system in which the amount of change in the image plane position relative to the lens interval change is small, and a compound-eye imaging device using the same.
  • (A)-(d) is a figure for demonstrating the example of deformation
  • (A) (b) is a figure which shows the relationship of the focal distance of a single lens. It is a graph which shows the value of Formula (10) by taking f / f2 on a horizontal axis and taking d (fB) / dt on a vertical axis
  • FIG. 3 is a cross-sectional view of a pair of single-lens lenses (single-eye imaging optical system) stacked in the optical axis direction in the compound-eye imaging system of Example 1;
  • FIG. 4 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 2.
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 2.
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 2.
  • FIG. 6 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 3.
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 3.
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 3.
  • FIG. 10 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 3 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 10 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 10 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 4;
  • FIG. 6 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 10 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 5.
  • FIG. 6 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 12 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 6.
  • FIG. 6 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 6 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • FIG. 10 is a cross-sectional view of a pair of single-lens single-lens imaging optical systems stacked in the optical axis direction in the compound-eye imaging system of Example 7.
  • FIG. 10 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • the compound-eye imaging optical system is an optical system in which a plurality of lens systems are arranged in an array with respect to one imaging device, and each lens system is different from a super-resolution type in which each lens system images the same subject. It is usually divided into a visual field division type for imaging a visual field.
  • a multi-eye imaging optical system according to a super-resolution type that combines a plurality of low-resolution images of the same subject by image processing and outputs one high-resolution image will be described.
  • FIG. 4 schematically shows the imaging apparatus according to the present embodiment.
  • the imaging device DU includes an imaging unit LU, an image processing unit 1, a calculation unit 2, a memory 3, and the like.
  • the imaging unit LU includes one imaging element SR and a compound-eye imaging optical system LH that forms a plurality of images of the same subject on the imaging element SR.
  • the image sensor SR for example, a solid-state image sensor such as a CCD (Charged Coupled Device) type image sensor or a CMOS (Complementary Metal Oxide Semiconductor) type image sensor having a plurality of pixels is used.
  • CCD Charged Device
  • CMOS Complementary Metal Oxide Semiconductor
  • the compound-eye imaging optical system LH is provided on the light-receiving surface SS that is the photoelectric conversion unit of the imaging element SR so that an optical image of the subject is formed, the optical image formed by the compound-eye imaging optical system LH is Then, it is converted into an electrical signal by the image sensor SR.
  • FIG. 5 is an enlarged cross-sectional view of the compound eye imaging optical system LH of FIG.
  • the compound-eye imaging optical system LH includes a first lens array LA1 and a second lens array LA2 in order from the object side. Each lens array is a so-called wafer lens.
  • the first lens array LA1 is formed by forming a plurality of first object side lens portions L1a on the object side of one first parallel plate PP1 and forming a plurality of first image side lens portions L1b on the image side by molding. Yes.
  • the first object-side lens portion L1a, the first parallel plate PP1, and the first image-side lens portion L1b constitute a first single-lens lens IL1.
  • a plurality of second object side lens portions L2a are formed on the object side of one second parallel flat plate PP2, and a plurality of second image side lens portions L2b are formed on the image side by molding. is doing.
  • the second object-side lens portion L2a, the second parallel plate PP2, and the second image-side lens portion L2b constitute a second single-eye lens group IL2.
  • the first eye lens IL1 and the second eye lens group IL2 stacked in the optical axis direction constitute a single eye imaging optical system.
  • the number of single lenses is made equal to the number of object images (referred to as single images) formed on the imaging surface SS of the image sensor SR. That is, the light rays that have passed through the single-lens lenses stacked in the optical axis direction form one image on the imaging surface SS.
  • S is an aperture stop formed around the first object side lens portion L1a
  • F is a parallel plate assuming an optical low-pass filter, an IR cut filter, a seal glass of a solid-state image sensor, and the like.
  • At least one of the first lens array LA1 and the second lens array LA2 may be integrally molded. Further, the single lens in one lens array may be designed for at least three different wavelength distributions and have different optical characteristics. Further, the single lens in one lens array may be combined with a plurality of color filters having transmittances corresponding to a plurality of different wavelength distributions.
  • the single-eye composite image ML is compressed by the calculation unit 2 and stored in the memory 3.
  • the first monocular lens that is the monocular lens of the first lens array has a positive refractive power.
  • the first single-lens lens have positive refractive power, the total length of the single-eye imaging optical system can be shortened.
  • the first single-eye lens satisfies the following conditional expression. 0.7 ⁇ f1 / f ⁇ 1.5 (2)
  • f1 Focal length of the first single-lens lens (mm)
  • the focal length of the first single-lens lens can be made closer to the focal length of the entire single-lens imaging optical system, and the focal length of the second single-lens lens group can be increased. It is possible to further increase the performance variation suppressing effect between the single-eye imaging optical systems with respect to the change in the interval. Moreover, shortening the overall length can be expected by reducing the focal length of the first single-lens lens. Specifically, when the value of conditional expression (2) is less than the upper limit value, the focal length of the first single-lens lens is reduced, the principal point is advanced, and the optical total length can be shortened. In addition, the angle of view can be widened by reducing the focal length of the first lens. On the other hand, when the value of conditional expression (2) exceeds the lower limit value, the focal length of the second eye lens increases, and fluctuations in the image plane position due to changes in the lens interval can be suppressed. A configuration image can be obtained.
  • the object side surface of the first single-lens lens which is the single-lens of the first lens array has a convex surface on the object side. Since the object side surface of the first monocular lens has a convex surface on the object side, the total length of the monocular imaging optical system can be shortened.
  • the first single-eye lens satisfies the following conditional expression. -5.0 ⁇ g1 ⁇ -0.5 (3)
  • R1 Curvature radius of object side surface of the first single-lens lens (mm)
  • R2 radius of curvature of the image side surface of the first single-lens lens (mm)
  • conditional expression (3) the optical performance of the compound-eye imaging optical system can be improved, and the moldability of the first lens array can be improved.
  • conditional expression (3) is less than the upper limit value, spherical aberration of the first single-eye lens can be suppressed, and a reconstructed image with good image quality can be obtained. Further, the principal point can be advanced to shorten the optical total length of the single-eye imaging optical system.
  • conditional expression (3) exceeds the lower limit value, the curvature of the first single-lens lens does not become too large, and the incidence of coma and the like can be reduced by reducing the light incident angle on the lens surface. Can be suppressed.
  • liquidity of resin can be ensured and a molding precision can be improved by not making curvature too large.
  • the peripheral portion of the surface closest to the image side in the second single-eye lens group has a convex shape on the image side. Since the periphery of the final surface of the second binocular lens group has a convex surface shape on the image side, the light emission angle at a high image height is reduced, and the telecentricity with respect to the imaging surface is improved. There is an effect of suppressing ray intrusion (crosstalk) into the eye imaging area.
  • d2 the distance (mm) between the image side surface of the first single-lens lens, which is the single-lens lens of the first lens array, and the most object-side surface of the second single-lens group
  • conditional expression (4) when the value of conditional expression (4) is below the upper limit value, the principal point can be advanced and the optical total length of the single-eye imaging optical system can be shortened. On the other hand, when the value of conditional expression (4) exceeds the lower limit value, the degree of freedom of the optical surface shape can be improved and the aberration correction capability can be increased by securing a certain distance between the single lenses. Desirably, the following conditional expression is satisfied. 0.1 ⁇ d2 / f ⁇ 0.19 (4 ′)
  • the focal length f2 of the second single-lens lens group in each single-eye imaging optical system satisfies the conditional expression (1).
  • the difference in the focal length f2 of the second single-lens lens group in each single-eye imaging optical system designed in common for all wavelength ranges is zero in design.
  • conditional expression (5) the difference in the focal length f2 of the second single-lens lens group between the single-eye imaging optical systems becomes small regardless of the specifications, and the lens interval With respect to the change, it is possible to suppress variation in the image plane position variation for each single-lens imaging optical system, and a reconstructed image with good image quality can be obtained.
  • conditional expression is satisfied. 0 ⁇ ⁇ (f / f2) max ⁇ 0.05
  • the focal lengths at the respective reference wavelengths of the single-eye imaging optical systems designed for three different wavelength distributions ⁇ ( ⁇ ), ⁇ ( ⁇ ), and ⁇ ( ⁇ ) are f ⁇ , f ⁇ , and f ⁇ . If the focal lengths of the second lens unit are f2 ⁇ , f2 ⁇ , and f2 ⁇ , then
  • S is a surface number
  • the surface on which the aspheric coefficient is described is a surface having an aspheric shape
  • the aspheric shape has the vertex of the surface as the origin and the Z axis in the optical axis direction.
  • the height in the direction perpendicular to the optical axis is represented by the following “Equation 1”.
  • z sag amount of a plane parallel to the optical axis h: height in a direction perpendicular to the optical axis
  • R radius of curvature
  • k conic coefficient (conical constant)
  • a i i-th order aspheric coefficient
  • Example 1 shows lens data of Example 1.
  • the design center wavelength of Example 1 is 546.1 nm.
  • a power of 10 for example, 2.5 ⁇ 10 ⁇ 02
  • E for example, 2.5E-02
  • FIG. 6 is a cross-sectional view of the single-eye imaging optical system of Example 1.
  • IL1 is a first monocular lens having a convex surface on the object side and having positive refractive power
  • IL2 is a second monocular lens group.
  • the peripheral portion of the surface closest to the image side of the second unit lens group IL2 has a convex surface shape on the image side.
  • FIG. 7 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism / field curvature (b), distortion aberration (c)).
  • the solid line represents the ray of wavelength 656 nm
  • the dotted line represents the ray of wavelength 546 nm
  • the alternate long and short dash line represents the amount of spherical aberration with respect to the ray of wavelength 405 nm.
  • the solid line represents the sagittal direction
  • the dotted line represents the meridional direction (the same applies hereinafter).
  • Example 2 Lens data of Example 2 are shown in Tables 2A to 2C.
  • 8 to 10 are sectional views of the single-eye imaging optical system according to the second embodiment.
  • the first lens array and the second lens array are integrally formed (the same applies to the third, fourth, fifth, and seventh embodiments), and the single-eye imaging optical system is designed for each wavelength.
  • the single-eye imaging optical system shown in Table 2A and FIG. 8 is an example in which the optimum design is performed for the red region, and the design center wavelength is 622.0 nm.
  • the single-eye imaging optical system shown in Table 2B and FIG. 9 is an example in which the optimum design is performed for the green region, and the design center wavelength is 544.0 nm.
  • the single-eye imaging optical system shown in Table 2C and FIG. 10 is an example in which the optimum design is performed for the blue region, and the design center wavelength is 458.0 nm.
  • These single-eye imaging optical systems can be formed as a set of three and used together with a corresponding color filter to form one object image.
  • IL1 is a first monocular lens having a convex surface on the object side and having positive refractive power
  • IL2 is a second monocular lens group.
  • the peripheral portion of the surface closest to the image side of the second unit lens group IL2 has a convex surface shape on the image side.
  • FIGS. 11 to 13 are aberration diagrams (spherical aberration (a), astigmatism / field curvature (b), distortion aberration (c)) respectively corresponding to the single-eye imaging optical systems of FIGS.
  • Example 3 Lens data of Example 3 are shown in Tables 3A to 3C.
  • 14 to 16 are sectional views of the single-eye imaging optical system according to the third embodiment.
  • the first lens array and the second lens array are integrally formed, and the single-eye imaging optical system is designed for each wavelength.
  • the single-eye imaging optics shown in Table 3A and FIG. The system is an example in which the optimum design is performed for the red region, and the design center wavelength is 622.0 nm.
  • the single-eye imaging optical system shown in Table 3B and FIG. 15 is an example in which the optimum design is performed for the green region, and the design center wavelength is 544.0 nm. Further, the single-eye imaging optical system shown in Table 3C and FIG.
  • FIGS. 17 to 19 are aberration diagrams (spherical aberration (a), astigmatism / field curvature (b), distortion aberration (c)) corresponding to the single-eye imaging optical systems of FIGS. 14 to 16, respectively.
  • Example 4 shows lens data of Example 4.
  • the design center wavelength of Example 4 is 530.0 nm.
  • FIG. 20 is a cross-sectional view of the single-eye imaging optical system of Example 4.
  • IL1 is a first monocular lens having a convex surface on the object side and having positive refractive power
  • IL2 is a second monocular lens
  • IL3 is a third monocular lens.
  • IL2 and IL3 constitute a second monocular lens group.
  • the peripheral portion of the surface closest to the image side of the third eye lens IL3 has a convex shape on the image side.
  • FIG. 21 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • the solid line represents the light beam having a wavelength of 570 nm
  • the dotted line represents the light beam having a wavelength of 530 nm
  • the alternate long and short dash line represents the amount of spherical aberration with respect to the light beam having a wavelength of 490 nm.
  • FIG. 22 is a cross-sectional view of the single-eye imaging optical system of Example 5.
  • IL1 is a first monocular lens having a convex surface on the object side and having positive refractive power
  • IL2 is a second monocular lens group.
  • the peripheral portion of the surface closest to the image side of the second unit lens group IL2 has a convex surface shape on the image side.
  • I denotes an imaging surface
  • F denotes a parallel plate assuming an optical low-pass filter, an IR cut filter, a seal glass of a solid-state imaging device, or the like.
  • Example 23 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • the solid line represents the ray of wavelength 656 nm
  • the dotted line represents the ray of wavelength 546 nm
  • the alternate long and short dash line represents the amount of spherical aberration with respect to the ray of wavelength 405 nm.
  • FIG. 24 is a cross-sectional view of the single-eye imaging optical system of Example 6.
  • IL1 is a first monocular lens having a convex surface on the object side and having positive refractive power
  • IL2 is a second monocular lens group.
  • the peripheral portion of the surface closest to the image side of the second unit lens group IL2 has a convex surface shape on the image side.
  • I denotes an imaging surface
  • F denotes a parallel plate assuming an optical low-pass filter, an IR cut filter, a seal glass of a solid-state imaging device, or the like.
  • Example 6 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • the solid line represents the ray of wavelength 656 nm
  • the dotted line represents the ray of wavelength 546 nm
  • the alternate long and short dash line represents the amount of spherical aberration with respect to the ray of wavelength 405 nm.
  • Example 7 shows lens data of Example 7.
  • the design center wavelength of Example 7 is 546.1 nm.
  • FIG. 26 is a cross-sectional view of the single-eye imaging optical system of Example 7.
  • IL1 is a first monocular lens having a convex surface on the object side and having positive refractive power
  • IL2 is a second monocular lens group.
  • I denotes an imaging surface
  • F denotes a parallel plate assuming an optical low-pass filter, an IR cut filter, a seal glass of a solid-state imaging device, or the like.
  • FIG. 27 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism / field curvature (b), distortion (c)).
  • the solid line represents the ray of wavelength 656 nm
  • the dotted line represents the ray of wavelength 546 nm
  • the alternate long and short dash line represents the amount of spherical aberration with respect to the ray of wavelength 405 nm.
  • Table 8 shows the values of each example corresponding to each conditional expression.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

Cette invention concerne un système optique d'imagerie à œil à facettes, et un dispositif d'imagerie à œil à facettes l'utilisant, système selon lequel la somme de modifications des positions des plans d'imagerie en fonction des modifications de l'écartement de lentilles est faible. Autrement dit, même si une inclinaison ou déformation d'une matrice de lentilles entraîne une modification de l'écartement de lentilles pour chaque système optique d'imagerie unitaire, la dégradation de la qualité de l'image reconstruite due à la variation de la somme de changements de positions des plans d'imagerie des systèmes optiques d'imagerie unitaires respectifs est minimisée. Ce système optique d'imagerie à œil à facettes, qui forme une pluralité d'images d'objets, satisfait à la condition (1) selon laquelle f représente la longueur focale globale des systèmes optiques d'imagerie unitaires en millimètres et f2 représente la longueur focale d'un second groupe de lentilles unitaires en millimètres. (1) −0,6 < f/f2 < 1,5
PCT/JP2014/063541 2013-06-17 2014-05-22 Système optique d'imagerie à œil à facettes et dispositif d'imagerie à œil à facettes Ceased WO2014203675A1 (fr)

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JP2015522686A JPWO2014203675A1 (ja) 2013-06-17 2014-05-22 複眼撮像光学系及び複眼撮像装置

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JP2013-126471 2013-06-17
JP2013126471 2013-06-17

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005176117A (ja) * 2003-12-12 2005-06-30 Canon Inc 撮像装置
JP2007293176A (ja) * 2006-04-27 2007-11-08 Konica Minolta Opto Inc 撮像レンズ、撮像装置及び該撮像装置を備えた携帯端末
JP2007329714A (ja) * 2006-06-08 2007-12-20 Funai Electric Co Ltd 複眼撮像装置
JP2008083398A (ja) * 2006-09-27 2008-04-10 Olympus Corp 複眼光学系及びそれを用いた光学装置
JP2009098492A (ja) * 2007-10-18 2009-05-07 Konica Minolta Opto Inc 撮像レンズ、撮像装置およびデジタル機器
JP2009103896A (ja) * 2007-10-23 2009-05-14 Komatsulite Mfg Co Ltd 撮像レンズ
JP2009103897A (ja) * 2007-10-23 2009-05-14 Komatsulite Mfg Co Ltd 撮像レンズ
JP2009128883A (ja) * 2007-11-28 2009-06-11 Enplas Corp 撮像レンズ
WO2012165281A1 (fr) * 2011-06-01 2012-12-06 コニカミノルタアドバンストレイヤー株式会社 Unité d'œil composé

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005176117A (ja) * 2003-12-12 2005-06-30 Canon Inc 撮像装置
JP2007293176A (ja) * 2006-04-27 2007-11-08 Konica Minolta Opto Inc 撮像レンズ、撮像装置及び該撮像装置を備えた携帯端末
JP2007329714A (ja) * 2006-06-08 2007-12-20 Funai Electric Co Ltd 複眼撮像装置
JP2008083398A (ja) * 2006-09-27 2008-04-10 Olympus Corp 複眼光学系及びそれを用いた光学装置
JP2009098492A (ja) * 2007-10-18 2009-05-07 Konica Minolta Opto Inc 撮像レンズ、撮像装置およびデジタル機器
JP2009103896A (ja) * 2007-10-23 2009-05-14 Komatsulite Mfg Co Ltd 撮像レンズ
JP2009103897A (ja) * 2007-10-23 2009-05-14 Komatsulite Mfg Co Ltd 撮像レンズ
JP2009128883A (ja) * 2007-11-28 2009-06-11 Enplas Corp 撮像レンズ
WO2012165281A1 (fr) * 2011-06-01 2012-12-06 コニカミノルタアドバンストレイヤー株式会社 Unité d'œil composé

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