CN106646830A - Automobile super-wide-angle small prime lens - Google Patents
Automobile super-wide-angle small prime lens Download PDFInfo
- Publication number
- CN106646830A CN106646830A CN201710054148.7A CN201710054148A CN106646830A CN 106646830 A CN106646830 A CN 106646830A CN 201710054148 A CN201710054148 A CN 201710054148A CN 106646830 A CN106646830 A CN 106646830A
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- Prior art keywords
- lens
- focal length
- automobile
- tight shot
- alpha
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- 239000011521 glass Substances 0.000 claims abstract description 32
- 229920003023 plastic Polymers 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 239000000571 coke Substances 0.000 claims description 12
- 210000005056 cell body Anatomy 0.000 claims description 8
- 230000000007 visual effect Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention belongs to the technical field of optical devices and in particular relates to an automobile super-wide-angle small prime lens. The automobile super-wide-angle small prime lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object space to an image space, wherein the first lens is a convex-concave negative focal power glass spherical lens, the second lens is a concave-convex positive focal power plastic aspherical lens, the third lens is a biconvex positive focal power plastic aspherical lens, the fourth lens is a biconcave negative focal power plastic aspherical lens, the fifth lens is a biconvex positive focal power plastic aspherical lens. Compared with the prior art, the automobile super-wide-angle small prime lens adopts a structure of one glass spherical lens and four plastic aspherical lens, gives fully play to the advantages that the glass lens is easy to process and the plastic lens is low in cost and has super-short focal length of 1.8mm and maximum view field angle of 160 degrees, small volume, overall length less than 14mm, high performance cost ratio and a good market prospect.
Description
Technical field
The invention belongs to field of optical device technology, more particularly to a kind of small-sized tight shot of automobile-used ultra-wide angle.
Background technology
With social economy, science and technology develop rapidly, automobile-used video system become more popular with it is high-end.Chip is more
New to regenerate, the various aspects of performance of automobile-used camera lens includes the angle of visual field, clear aperature, pixel, image planes size etc. also in optimization, wherein surpassing
Wide-angle tight shot is one of the camera lens for accounting for demand significant proportion, is characterized in that focal length is short, and the angle of visual field is big, and the scope of monitoring is very
Extensively.
But, the focal length of ultra-wide angle tight shot of the prior art is longer, relatively costly, the angle of visual field is less, volume ratio
Larger, cost performance can not meet the market demand.
In view of this, it is necessory to provide a kind of automobile-used ultra-wide angle small-sized tight shot, it adopts a piece of glass lens and 4
The optical texture of piece plastic lens, gives full play to the advantage of glass lens glass lens low cost easy to process, possesses ultrashort Jiao
Away from 1.8mm, 160 degree of maximum field of view angle, compact, overall length is less than 14mm, and cost performance is high, good market prospects.
The content of the invention
It is an object of the invention to：For the deficiencies in the prior art, and provide a kind of automobile-used ultra-wide angle small-sized tight shot,
It adopts the optical texture of a piece of glass lens and 4 plastic lens, give full play to glass lens glass lens easy to process into
This low advantage, possesses ultrashort focal length 1.8mm, and 160 degree of maximum field of view angle, compact, overall length is less than 14mm, cost performance
Height, good market prospects.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
The small-sized tight shot of automobile-used ultra-wide angle, including the first lens, the second lens being arranged in order from the object side to the image side,
Three lens, the 4th lens and the 5th lens, first lens be convex-concave negative power glass spherical lens, second lens
For concavo-convex positive light coke plastic aspheric lens, the 3rd lens are biconvex positive light coke plastic aspheric lens, described the
Four lens are concave-concave negative power plastic aspheric lens, and the 5th lens are biconvex positive light coke plastic aspheric lens；
Jiao of first lens, second lens, the 3rd lens, the 4th lens and the 5th lens
Meet following condition away from the ratio of the focal length of whole camera lens：
2.0 ＜ | f1/f | ＜ 3.0；
6.0 ＜ | f2/f | ＜ 9.0；
1.0 ＜ | f3/f | ＜ 2.0；
0.6 ＜ | f4/f | ＜ 1.2；
1.0 ＜ | f5/f | ＜ 2.0；
Wherein, f is the focal length of whole camera lens；F1 is the focal length of first lens, and f2 is the focal length of second lens,
F3 is the focal length of the 3rd lens；F4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens.
A kind of as the small-sized tight shot of automobile-used ultra-wide angle of the invention improves, first lens and second lens
Directly breasting, second lens are with the 3rd lens by spacer ring close-fitting, and the 3rd lens are logical with the 4th lens
Soma close-fittings are crossed, the 4th lens pass through soma close-fittings with the 5th lens.
A kind of as the small-sized tight shot of automobile-used ultra-wide angle of the invention improves, the focal length of the whole camera lens of the tight shot
F meets following condition：1.8mm≤f≤3.0mm.
A kind of as the small-sized tight shot of automobile-used ultra-wide angle of the invention improves, and angle of visual field FOV of the tight shot expires
The following condition of foot：120°≤FOV≤180°.
A kind of as the small-sized tight shot of automobile-used ultra-wide angle of the invention improves, and the aperture FNO of the tight shot meets
Following condition：FNO≥2.0.
A kind of as the small-sized tight shot of automobile-used ultra-wide angle of the invention improves, and optics overall length TTL of the camera lens meets
Following condition：13mm≤TTL≤20mm.
A kind of as the small-sized tight shot of automobile-used ultra-wide angle of the invention improves, second lens, the 3rd lens,
The aspherical lens of the 4th lens and the 5th lens meet below equation：
Wherein：Z be it is aspherical along optical axis direction height for r position when, away from aspheric vertex of surface apart from rise.C=
1/R, R represent the radius of curvature at Mian Xing centers, and k represents circular cone coefficient, parameter a1、a2、a3、a4、a5、a6、a7、a8For high order aspheric
Face coefficient.
Relative to prior art, the present invention has the advantage that：
First, second lens of the present invention, the 3rd lens, the 4th lens and the 5th lens employ glass lens, accomplish
Low cost and high-performance, the cost of glass lens is far below glass spheric glass, so reduce cost；Again due to the present invention
The second lens, the 3rd lens, the 4th lens and the 5th lens employ aspherical lens, compare traditional spheric glass and carry
High performance.
Second, the present invention adds the structure of 4 plastic aspherical element eyeglasses using 1 glass spheric glass, gives full play to glass
Eyeglass is easy to process, the advantage of glass lens low cost, possesses ultrashort focal length 1.8mm, 160 degree of maximum field of view angle, small volume
Ingeniously, overall length is less than 14mm, and cost performance is high, good market prospects.
3rd, the present invention has under visible light two mega pixels, and by the combination of reasonable employment glass plastic macropore is realized
Footpath F2.0, image quality is good, and clear bright monitored picture can be also realized under night low-light (level).Simultaneously the present invention is by closing
Reason optimization, possesses temperature compensation function, can reach to be used under -30～+80 degree environment and not run Jiao, it is adaptable to driving recording,
The equipment such as motion photography, home security.
Description of the drawings
Fig. 1 is the optical texture schematic diagram of the present invention.
Specific embodiment
The present invention and its advantage are described in further detail below with reference to specific embodiment, but, this
Bright specific embodiment is not limited thereto.
As shown in figure 1, the small-sized tight shot of automobile-used ultra-wide angle that the present invention is provided, including being arranged in order from the object side to the image side
The first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4 and the 5th lens 5, the first lens 1 are convex-concave negative power
Glass spherical lens, the second lens 2 are concavo-convex positive light coke plastic aspheric lens, and the 3rd lens 3 are the modeling of biconvex positive light coke
Material non-spherical lens, the 4th lens 4 are concave-concave negative power plastic aspheric lens, and the 5th lens 5 are the modeling of biconvex positive light coke
Material non-spherical lens；
The focal length and whole camera lens of the first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4 and the 5th lens 5
The ratio of focal length meets following condition：
2.0 ＜ | f1/f | ＜ 3.0；
6.0 ＜ | f2/f | ＜ 9.0；
1.0 ＜ | f3/f | ＜ 2.0；
0.6 ＜ | f4/f | ＜ 1.2；
1.0 ＜ | f5/f | ＜ 2.0；
Wherein, f is the focal length of whole camera lens；F1 is the focal length of the first lens 1, and f2 is the focal length of the second lens 2, and f3 is
The focal length of three lens 3；F4 is the focal length of the 4th lens 4；F5 is the focal length of the 5th lens 5.So can just reach miniaturization, height
The purpose of performance.
First lens 1 and the direct breasting of the second lens 2, the second lens 2 and the 3rd lens 3 are by spacer ring close-fitting, and the 3rd is saturating
The lens 4 of mirror 3 and the 4th pass through soma close-fittings by soma close-fittings, the 4th lens 4 and the 5th lens 5.
The focal length f of the whole camera lens of tight shot meets following condition：1.8mm≤f≤3.0mm.
Angle of visual field FOV of tight shot meets following condition：120°≤FOV≤180°.
The aperture FNO of tight shot meets following condition：FNO≥2.0.
Optics overall length TTL of camera lens meets following condition：13mm≤TTL≤20mm.
The aspherical lens of the second lens 2, the 3rd lens 3, the 4th lens 4 and the 5th lens 5 meet below equation：
Wherein：Z be it is aspherical along optical axis direction height for r position when, away from aspheric vertex of surface apart from rise.C=
1/R, R represent the radius of curvature at Mian Xing centers, and k represents circular cone coefficient, parameter a1、a2、a3、a4、a5、a6、a7、a8For high order aspheric
Face coefficient.
Embodiment 1
A kind of small-sized tight shot of automobile-used ultra-wide angle is present embodiments provided, including for being arranged in order from the object side to the image side
One lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4 and the 5th lens 5, the first lens 1 are convex-concave negative power glass
Spherical lens, the second lens 2 are concavo-convex positive light coke plastic aspheric lens, and the 3rd lens 3 are that biconvex positive light coke plastics are non-
Spherical lens, the 4th lens 4 are concave-concave negative power plastic aspheric lens, and the 5th lens 5 are that biconvex positive light coke plastics are non-
Spherical lens.
First lens 1 and the direct breasting of the second lens 2, the second lens 2 and the 3rd lens 3 are by spacer ring close-fitting, and the 3rd is saturating
The lens 4 of mirror 3 and the 4th pass through soma close-fittings by soma close-fittings, the 4th lens 4 and the 5th lens 5.
In the present embodiment, the focal length f=1.8mm of tight shot, aperture FNO=2.4, angle of visual field FOV=170 °, optics is total
Long TTL=13.5mm；The chip that pixel separation is 2.2 μm can be supported, edge relative illumination is 50%, the radius of curvature of each lens
R, center thickness d and refractive index nd refer to table 1：
Table 1：The physical parameter of each lens
In table 1, face sequence number 1 and 2 corresponds to respectively the face towards object space and the face towards image space of the first lens 1；Face sequence number 3
The face towards object space and the face towards image space for corresponding to the second lens 2 respectively with 4；Face sequence number 5 and 6 corresponds to respectively the 3rd lens 3
The face towards object space and the face towards image space；Face sequence number 7 and 8 corresponds to respectively the face towards object space and the direction of the 4th lens 4
The face of image space；Face sequence number 9 and 10 corresponds to respectively the face towards object space and the face towards image space of the 5th lens 5.
The face that " * " is indicated in table 1 is aspherical, and aspherical lens meet equation below：
Wherein：Z be it is aspherical along optical axis direction height for r position when, away from aspheric vertex of surface apart from rise.C=
1/R, R represent the radius of curvature at Mian Xing centers, and k represents circular cone coefficient, parameter a1、a2、a3、a4、a5、a6、a7、a8For high order aspheric
Face coefficient.
Table 2：The aspherical parameter on the surface of the 3rd, 4,5,6,7,8,9 and 10.
In a word, the present invention has the advantage that：
First, second lens 2 of the present invention, the 3rd lens 3, the 4th lens 4 and the 5th lens 5 employ glass lens,
Accomplish low cost and high-performance, the cost of glass lens is far below glass spheric glass, so reduce cost；Again due to this
The second lens 2, the 3rd lens 3, the 4th lens 4 and the 5th lens 5 invented employ aspherical lens, compare traditional ball
Face eyeglass improves performance.
Second, the present invention adds the structure of 4 plastic aspherical element eyeglasses using 1 glass spheric glass, gives full play to glass
Eyeglass is easy to process, the advantage of glass lens low cost, possesses ultrashort focal length 1.8mm, 160 degree of maximum field of view angle, small volume
Ingeniously, overall length is less than 14mm, and cost performance is high, good market prospects.
3rd, the present invention has under visible light two mega pixels, and by the combination of reasonable employment glass plastic macropore is realized
Footpath F2.0, image quality is good, and clear bright monitored picture can be also realized under night low-light (level).Simultaneously the present invention is by closing
Reason optimization, possesses temperature compensation function, can reach to be used under -30～+80 degree environment and not run Jiao, it is adaptable to driving recording,
The equipment such as motion photography, home security.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out appropriate change and modification.Therefore, specific embodiment disclosed and described above is the invention is not limited in, to this
Some modifications and changes of invention should also be as falling into the scope of the claims of the present invention.Although additionally, this specification
Used in some specific terms, but these terms are merely for convenience of description, do not constitute any restriction to the present invention.
Claims (7)
1. the small-sized tight shot of automobile-used ultra-wide angle, it is characterised in that：Including the first lens being arranged in order from the object side to the image side,
Two lens, the 3rd lens, the 4th lens and the 5th lens, first lens be convex-concave negative power glass spherical lens, institute
It is concavo-convex positive light coke plastic aspheric lens to state the second lens, and the 3rd lens are that biconvex positive light coke plastic aspherical element is saturating
Mirror, the 4th lens are concave-concave negative power plastic aspheric lens, and the 5th lens are that biconvex positive light coke plastics are non-
Spherical lens；
The focal length of first lens, second lens, the 3rd lens, the 4th lens and the 5th lens with
The ratio of the focal length of whole camera lens meets following condition：
2.0 ＜ | f1/f | ＜ 3.0；
6.0 ＜ | f2/f | ＜ 9.0；
1.0 ＜ | f3/f | ＜ 2.0；
0.6 ＜ | f4/f | ＜ 1.2；
1.0 ＜ | f5/f | ＜ 2.0；
Wherein, f is the focal length of whole camera lens；F1 is the focal length of first lens, and f2 is the focal length of second lens, and f3 is
The focal length of the 3rd lens；F4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens.
2. the small-sized tight shot of automobile-used ultra-wide angle according to claim 1, it is characterised in that：First lens with it is described
The direct breasting of second lens, second lens and the 3rd lens by spacer ring close-fitting, the 3rd lens and described the
Four lens pass through soma close-fittings by soma close-fittings, the 4th lens with the 5th lens.
3. the small-sized tight shot of automobile-used ultra-wide angle according to claim 1, it is characterised in that：The whole mirror of the tight shot
The focal length f of head meets following condition：1.8mm≤f≤3.0mm.
4. the small-sized tight shot of automobile-used ultra-wide angle according to claim 1, it is characterised in that：The visual field of the tight shot
Angle FOV meets following condition：120°≤FOV≤180°.
5. the small-sized tight shot of automobile-used ultra-wide angle according to claim 1, it is characterised in that：The aperture of the tight shot
FNO meets following condition：FNO≥2.0.
6. the small-sized tight shot of automobile-used ultra-wide angle according to claim 1, it is characterised in that：The optics overall length of the camera lens
TTL meets following condition：13mm≤TTL≤20mm.
7. the small-sized tight shot of automobile-used ultra-wide angle according to claim 1, it is characterised in that：It is second lens, described
The aspherical lens of the 3rd lens, the 4th lens and the 5th lens meet below equation：
Wherein：Z be it is aspherical along optical axis direction height for r position when, away from aspheric vertex of surface apart from rise.C=1/R, R
The radius of curvature at Mian Xing centers is represented, k represents circular cone coefficient, parameter a1、a2、a3、a4、a5、a6、a7、a8For high order aspheric surface system
Number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054148.7A CN106646830A (en) | 2017-01-22 | 2017-01-22 | Automobile super-wide-angle small prime lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054148.7A CN106646830A (en) | 2017-01-22 | 2017-01-22 | Automobile super-wide-angle small prime lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106646830A true CN106646830A (en) | 2017-05-10 |
Family
ID=58841193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710054148.7A Pending CN106646830A (en) | 2017-01-22 | 2017-01-22 | Automobile super-wide-angle small prime lens |
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| Country | Link |
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| CN (1) | CN106646830A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269252A (en) * | 2020-11-18 | 2021-01-26 | 协益电子（苏州）有限公司 | Ultra-wide angle prime lens |
| CN112859299A (en) * | 2021-03-19 | 2021-05-28 | 舜宇光学(中山)有限公司 | Fixed focus lens |
| CN115390221A (en) * | 2022-08-26 | 2022-11-25 | 东莞市宇瞳汽车视觉有限公司 | Fixed-focus lens and vehicle-mounted camera |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213816A (en) * | 2010-04-02 | 2011-10-12 | 大立光电股份有限公司 | Optical photographic lens |
| CN104914553A (en) * | 2014-03-12 | 2015-09-16 | 富士胶片株式会社 | Imaging lens and imaging apparatus |
| CN206788444U (en) * | 2017-01-22 | 2017-12-22 | 东莞市宇瞳光学科技股份有限公司 | Super wide-angle compact fixed-focus lens for vehicles |
-
2017
- 2017-01-22 CN CN201710054148.7A patent/CN106646830A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213816A (en) * | 2010-04-02 | 2011-10-12 | 大立光电股份有限公司 | Optical photographic lens |
| CN104914553A (en) * | 2014-03-12 | 2015-09-16 | 富士胶片株式会社 | Imaging lens and imaging apparatus |
| CN206788444U (en) * | 2017-01-22 | 2017-12-22 | 东莞市宇瞳光学科技股份有限公司 | Super wide-angle compact fixed-focus lens for vehicles |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269252A (en) * | 2020-11-18 | 2021-01-26 | 协益电子（苏州）有限公司 | Ultra-wide angle prime lens |
| CN112859299A (en) * | 2021-03-19 | 2021-05-28 | 舜宇光学(中山)有限公司 | Fixed focus lens |
| CN112859299B (en) * | 2021-03-19 | 2025-07-15 | 舜宇光学(中山)有限公司 | Fixed focal length lens |
| CN115390221A (en) * | 2022-08-26 | 2022-11-25 | 东莞市宇瞳汽车视觉有限公司 | Fixed-focus lens and vehicle-mounted camera |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Pinguang Inventor after: Liu Guanlu Inventor after: He Jianwei Inventor after: Mao Caiying Inventor before: Liu Guanlu |
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| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
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| RJ01 | Rejection of invention patent application after publication |