CN205404939U - On -vehicle camera lens of low distortion of high definition wide angle - Google Patents
On -vehicle camera lens of low distortion of high definition wide angle Download PDFInfo
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- CN205404939U CN205404939U CN201620158537.5U CN201620158537U CN205404939U CN 205404939 U CN205404939 U CN 205404939U CN 201620158537 U CN201620158537 U CN 201620158537U CN 205404939 U CN205404939 U CN 205404939U
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- lens
- lens element
- angle
- high definition
- vehicle
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Abstract
The utility model discloses an on -vehicle camera lens of low distortion of high definition wide angle, include the lens element, the 2nd lens element, diaphragm component, the 3rd lens element, fourth lens element and the 5th lens element that follow the object space and begin to establish in proper order, wherein: a lens element is for having negative focal power and being the falcate lens to object space one side evagination, the 2nd lens element is for having negative focal power and being the falcate lens to object space one side evagination, the biconvex type lens of the 3rd lens element for having positive focal power, the biconvex type lens of fourth lens element for having positive focal power, the 5th lens element is for having negative focal power and being the falcate lens to image space one side evagination. Adopting 5 lenses, effectively rectify the aberration among the optical system, reach the angle of vision of gratifying optical characteristic and 146 degrees, does TV only distort 13%, the camera lens overall length is that TTL is 20.9 mm to satisfy the special application requirement of on -vehicle camera lens.
Description
Technical field
The utility model relates to a kind of on-vehicle lens, particularly relates to a kind of low distortion on-vehicle lens of high definition wide-angle.
Background technology
Along with camera lens and the development of electronic technology, camera lens is the most no longer merely confined in camera system.Except traditional
Vehicle-mounted shooting, camera lens also begins under other various video acquisition environment.The shooting to surrounding environment of the such as monitoring system,
Various vehicle fittings include the passenger vehicle in automobile, lorry, motorcycle etc., in order to ensure driver's peace when carrying out reverse action
Quan Xing, it is to avoid cause damage with car, people or other object collision, therefore install at vehicle rear and be originally served only for camera
Wide-angle lens, by this camera lens picked-up external object picture, allowed by line transmission be sitting in driver's cabin driver viewing
Judge, it is ensured that the safety between vehicle and other object.But the wide-angle lens of in-vehicle camera at present, general employing 6 or 6
Above glass lens composition, this wide-angle lens not only heavier-weight, relatively costly, and after the angle of visual field is more than 90 °, distortion
Will be very serious, to this end, the wide-angle lens of a lot of optics enterprise development uses aspherical technology, with alleviate weight, cost and
Reducing distortion amount, but owing to this camera lens manufacturing cost is high, and have certain technology barriers, Glass aspheric technology to supply at home
Answer chain immature.In view of this, for how searching out one, can to obtain large aperture in spherical glass design basis super wide
The lens technology means at angle are just particularly important.
Summary of the invention
The utility model proposes the high definition on-vehicle lens of a kind of ultra-wide angle, low distortion, large aperture.
For realizing above-mentioned relating to, the utility model uses with following technical proposals:
A kind of low distortion on-vehicle lens of high definition wide-angle, it is characterised in that include that start from thing side to set gradually first is saturating
Mirror element, the second lens element, aperture member, the 3rd lens element, the 4th lens element and the 5th lens element；Wherein:
Described first lens element is to have negative focal power and in the falcate eyeglass to side, thing side evagination；
Described second lens element is to have negative focal power and in the falcate eyeglass to side, thing side evagination；
Described 3rd lens element is the biconvex eyeglass with positive focal power；
Described 4th lens element is the biconvex eyeglass with positive focal power；
Described 5th lens element is to have negative focal power and in the falcate eyeglass to image space side evagination.
Further, described first lens element meets following condition formula:
Nd >=1.54, Vd >=54, wherein Nd represents the d optical index of the first lens element material, and Vd represents the first lens
The d light Abbe constant of element material.
Further, described second lens element meets following condition formula:
Nd >=1.50, Vd >=54, wherein Nd represents the d optical index of the second lens element material, and Vd represents the second lens
The d light Abbe constant of element material.
Further, described first lens element and the second lens element meet following condition formula:
2.4 >=F2/F1 >=1.6, wherein F1 represents the focal length value of the first lens element, and F2 represents Jiao of the second lens element
Away from value.
Further, described 3rd lens element and the 4th lens element meet following condition formula:
1.5 >=F3/F4 >=1, wherein F3 represents the focal length value of the 3rd lens element, and F4 represents the focal length of the 4th lens element
Value.
Further, described 3rd lens element meets following condition formula:
2 >=F3/F >=1, wherein F3 represents the focal length value of the 3rd lens element, and F represents the described low distortion on-vehicle of high definition wide-angle
The whole focal length value of camera lens.
Preferably, described high definition wide-angle total angle of visual field ω of low distortion on-vehicle lens meets following formula: 2 ω=120 ~ 160 °.
Wherein, the first lens element thing side side outermost point of the described low distortion on-vehicle lens of high definition wide-angle to meet to the distance of imaging surface
Following formula: TTL >=20.5 mm.
Preferably, described first lens element, the second lens element, the 3rd lens element, the 4th lens element and the 5th
Lens element is glass lens element.
The beneficial effects of the utility model are: use five eyeglasses, can the effective aberration in correcting optical system, reach
Gratifying optical characteristics and wider total angle of visual field, TV distortion only-13%, there is longer camera lens overall length i.e. TTL simultaneously
More than 20.5mm, and have resistance to 120 degree of high temperature, with the special applications requirement of satisfied driving.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the utility model embodiment, below will be to the utility model embodiment
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to root
Other accompanying drawing is obtained according to the content of the utility model embodiment and these accompanying drawings.
Fig. 1 is structural representation of the present utility model (thing side is in left-most position, and image space is in right-most position).
Fig. 2 is imaging process schematic diagram of the present utility model.
Fig. 3 is chromatic curve figure of the present utility model.
Fig. 4 is astigmatism curve map of the present utility model.
Fig. 5 is distortion curve figure of the present utility model.
Fig. 6 is MTF curve figure of the present utility model.
In figure: 1-the first lens element, 2-the second lens element, 3-aperture member, 4-the 3rd lens element, 5-the 4th is saturating
Mirror element, 6-the 5th lens element.
Detailed description of the invention
For making the utility model solve the technical problem that, the technical scheme that uses and the technique effect reached clearer,
Below in conjunction with accompanying drawing, the technical scheme of the utility model embodiment is described in further detail, it is clear that described reality
Executing example is only a part of embodiment of the utility model rather than whole embodiments.Based on the embodiment in the utility model,
The every other embodiment that those skilled in the art are obtained under not making creative work premise, broadly falls into this practicality new
The scope of type protection.
Refer to Fig. 1, it is the structural representation of the utility model a kind of high definition low distortion on-vehicle lens of wide-angle, such as Fig. 1
Shown in, it is specifically for use in vehicle-mounted video capture device of Denging.Camera lens includes the first lens element starting to set gradually from thing side
1, the second lens element 2, aperture member the 3, the 3rd lens element the 4, the 4th lens element 5 and the 5th lens element 6；Wherein:
Described first lens element 1 is to have negative focal power and in the falcate eyeglass to side, thing side evagination；
Described second lens element 2 is to have negative focal power and in the falcate eyeglass to side, thing side evagination；
Described 3rd lens element 4 is the biconvex eyeglass with positive focal power；
Described 4th lens element 5 is the biconvex eyeglass with positive focal power；
Described 5th lens element 6 is to have negative focal power and in the falcate eyeglass to image space side evagination
Preferably, described first lens element 1 meets following condition formula:
Nd >=1.54, Vd >=54,
Wherein Nd represents the d optical index of the first lens element 1 material, Vd represent the first lens element 1 material d light Ah
Shellfish constant.
The utility model the first lens element 1 uses refractive index Nd >=1.54, and the high index of refraction of Abbe constant Vd >=54 is low
Chromatic dispersion material, can effectively import the light of more than 140 ° of angles of visual field and reduce the bore of first eyeglass, to avoid volume excessive.
Wherein, described second lens element 2 meets following condition formula:
Nd >=1.50, Vd >=54,
Wherein Nd represents the d optical index of the second lens element 2 material, Vd represent the second lens element 2 material d light Ah
Shellfish constant.
Second lens element 2 uses refractive index Nd >=1.50, the high index of refraction height chromatic dispersion material of Abbe constant Vd >=54.
Preferably, described first lens element 1 and the second lens element 2 meet following condition formula:
2.4 >=F2/F1 >=1.6,
Wherein F1 represents the focal length value of the first lens element 1, and F2 represents the focal length value of the second lens element 2.
First lens element 1 and focal length value formula to be met 2.4 >=F2/F1 >=1.6 of the second lens element 2.
Preferably, described 3rd lens element 4 and the 4th lens element 5 meet following condition formula:
1.5 >=F3/F4 >=1,
Wherein F3 represents the focal length value of the 3rd lens element 4, and F4 represents the focal length value of the 4th lens element 5.
Wherein, described 3rd lens element 4 meets following condition formula:
2 >=F3/F >=1,
Wherein F3 represents the focal length value of the 3rd lens element 4, and F represents the entirety of the described low distortion on-vehicle lens of high definition wide-angle
Focal length value.
When the whole focal length value of on-vehicle lens is F, and the 3rd lens element 4 focal length is F3, must meet condition 2 >=F3/F >=
1, the TTL length of this condition major control camera lens.
Wherein, described high definition wide-angle total angle of visual field ω of low distortion on-vehicle lens meets following formula: 2 ω=120 ~ 160 °.
Wherein, the first lens element 1 thing side side outermost point of the described low distortion on-vehicle lens of high definition wide-angle is to imaging surface
Distance to meet following formula: TTL >=20.5 mm.
Wherein, described first lens element the 1, second lens element 2, the 3rd lens element 4, the 4th lens element 5 and
Four lens elements 6 are glass lens element.
First lens element 1 of on-vehicle lens uses glass lens, can effectively protect on-vehicle lens in use to prevent
Scraping scrape along opposing rugged environment change impact, the 3rd lens element 4 uses high-dispersion glass eyeglass, can effective compensation optical system
The aberration of system, can the effective aberration in correcting optical system, with minimum number of lenses reach gratifying optical characteristics with
Wider total angle of visual field.The shell of camera lens uses full metal jacket, can effectively protect the internal structure of camera lens.
In the implementation case, the whole focal length value of this on-vehicle lens is F, and f-number is F/NO, the angle of visual field be 2 ω=
146 °, camera lens overall length TTL is more than 20.5mm, and by side, thing side, by each minute surface number consecutively, the first lens element 1
Curvature mirror radius is R1, R2, and the curvature mirror radius of the second lens element 2 is R3, R4, and diaphragm face is R5, the 3rd lens cells
The curvature mirror radius of part 4 is R6, R7, and the curvature mirror radius of the 4th lens element 5 is R8, R9, the mirror of the 5th lens element 6
Curvature radius is R10, R11, and the minute surface of colour filter IR is R12, R13,
The utility model F=3.05mm, F/NO=2. 0,2 ω=146 ° (1/2.7 " OV2710 imager chip), TTL=
20.9mm±0.3mm
The utility model optical system parameter table is shown in Table 1:
Table 1
| Face sequence number | Radius of curvature r | Center thickness d | Refractive index Nd | Abbe constant Vd |
| OBJ | Infinity | Infinity | ||
| 1 | 21 | 0.61 | 1.6 | 60 |
| 2 | 2.7 | 2.7 | ||
| 3 | 16 | 3 | 1.58 | 60 |
| 4 | 3.5 | 0.8 | ||
| STO | Infinity | 0.1 | ||
| 6 | 6 | 4.45 | 1.7 | 42 |
| 7 | -6 | 0.11 | ||
| 8 | 11.60 | 2.95 | 1.6 | 60 |
| 9 | -3 | 0.5 | 1.86 | 19 |
| 10 | -8 | 0.20 | ||
| 11 | Infinity | 1 | 1.5 | 64 |
| 12 | Infinity | 4.5 | ||
| 13 | Infinity |
Fig. 2 is the imaging process schematic diagram corresponding to the present embodiment, and Fig. 3 to Fig. 6 is optical corresponding to the present embodiment
Energy curve map, wherein Fig. 3 is chromatic curve figure (also can be spherical aberration curve map), the wavelength of the F commonly used, d. C tri-coloured light come
Representing, unit is mm.Fig. 4 is astigmatism curve map, the wavelength of the F commonly used, d. C tri-coloured light represent, unit is nm.Fig. 5
For distortion curve figure, representing the distortion sizes values in the case of the different angle of visual field, unit is %.Fig. 6 is MTF curve figure, represents one
The comprehensive solution of individual optical system is as level.As seen from the figure, this on-vehicle lens by various optical aberration correctings to be enough to practicality level.
During actual optical performance test, optical specification is:
1. die size and specification: 1/2.7 " For OV2710
2. optical focal length: 3.05mm
3. f-number: 2.0
4. burnt after optics: 5.62mm
5. burnt after machinery: 4.51mm
6. optics overall length: 20.9mm ± 0.3mm
7. optical angle: 152 ° (MAX) (for OV2710 D146 °/H121 °)
8. distortion :-13%(For OV 2710)
9. thread size: M12*P0.5-6g
10. eyeglass composition: 5G+IR
11. colour filter filters are long: T=50%@650 ± 10nm.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to this reality
By novel thought, the most all will change, this specification content should not be construed as
To restriction of the present utility model.
Claims (9)
1. the low distortion on-vehicle lens of high definition wide-angle, it is characterised in that include the first lens starting to set gradually from thing side
Element, the second lens element, aperture member, the 3rd lens element, the 4th lens element and the 5th lens element；Wherein:
Described first lens element is to have negative focal power and in the falcate eyeglass to side, thing side evagination；
Described second lens element is to have negative focal power and in the falcate eyeglass to side, thing side evagination；
Described 3rd lens element is the biconvex eyeglass with positive focal power；
Described 4th lens element is the biconvex eyeglass with positive focal power；
Described 5th lens element is to have negative focal power and in the falcate eyeglass to image space side evagination.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described first lens cells
Part meets following condition formula:
Nd >=1.54, Vd >=54,
Wherein Nd represents the d optical index of the first lens element material, and Vd represents that the d light Abbe of the first lens element material is normal
Number.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described second lens cells
Part meets following condition formula:
Nd >=1.50, Vd >=54,
Wherein Nd represents the d optical index of the second lens element material, and Vd represents that the d light Abbe of the second lens element material is normal
Number.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described first lens cells
Part and the second lens element meet following condition formula:
2.4 >=F2/F1 >=1.6,
Wherein F1 represents the focal length value of the first lens element, and F2 represents the focal length value of the second lens element.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described 3rd lens cells
Part and the 4th lens element meet following condition formula:
1.5 >=F3/F4 >=1,
Wherein F3 represents the focal length value of the 3rd lens element, and F4 represents the focal length value of the 4th lens element.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described 3rd lens cells
Part meets following condition formula:
2 >=F3/F >=1,
Wherein F3 represents the focal length value of the 3rd lens element, and F represents the whole focal length of the described low distortion on-vehicle lens of high definition wide-angle
Value.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described high definition wide-angle is low
Total angle of visual field ω of distortion on-vehicle lens meets following formula: 2 ω=120 ~ 160 °.
A kind of low distortion on-vehicle lens of high definition wide-angle the most according to claim 1, it is characterised in that described high definition wide-angle is low
First lens element thing side side outermost point of distortion on-vehicle lens to the distance of imaging surface to meet following formula: TTL >=20.5
mm。
9. according to a kind of low distortion on-vehicle lens of high definition wide-angle described in any one of claim 1 ~ 8, it is characterised in that described
One lens element, the second lens element, the 3rd lens element, the 4th lens element and the 5th lens element are glass lens unit
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620158537.5U CN205404939U (en) | 2016-03-02 | 2016-03-02 | On -vehicle camera lens of low distortion of high definition wide angle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620158537.5U CN205404939U (en) | 2016-03-02 | 2016-03-02 | On -vehicle camera lens of low distortion of high definition wide angle |
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| Publication Number | Publication Date |
|---|---|
| CN205404939U true CN205404939U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620158537.5U Expired - Fee Related CN205404939U (en) | 2016-03-02 | 2016-03-02 | On -vehicle camera lens of low distortion of high definition wide angle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065144A (en) * | 2017-06-21 | 2017-08-18 | 华勤通讯技术有限公司 | Wide-angle lens |
| CN111090168A (en) * | 2018-10-24 | 2020-05-01 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN113534419A (en) * | 2021-09-15 | 2021-10-22 | 宁波永新光学股份有限公司 | Clear on-vehicle optical imaging lens of superelevation |
-
2016
- 2016-03-02 CN CN201620158537.5U patent/CN205404939U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065144A (en) * | 2017-06-21 | 2017-08-18 | 华勤通讯技术有限公司 | Wide-angle lens |
| CN107065144B (en) * | 2017-06-21 | 2023-04-14 | 华勤技术股份有限公司 | Wide-angle lens |
| CN111090168A (en) * | 2018-10-24 | 2020-05-01 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN111090168B (en) * | 2018-10-24 | 2022-02-15 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN113534419A (en) * | 2021-09-15 | 2021-10-22 | 宁波永新光学股份有限公司 | Clear on-vehicle optical imaging lens of superelevation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20200302 |