CN101587231A - Megapixels large aperture vehicle front view lens - Google Patents
Megapixels large aperture vehicle front view lens Download PDFInfo
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- CN101587231A CN101587231A CNA2009100997048A CN200910099704A CN101587231A CN 101587231 A CN101587231 A CN 101587231A CN A2009100997048 A CNA2009100997048 A CN A2009100997048A CN 200910099704 A CN200910099704 A CN 200910099704A CN 101587231 A CN101587231 A CN 101587231A
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Abstract
A kind of Megapixels large aperture vehicle front view lens comprises from object space beginning to be provided with successively: the rear lens group that has front lens group, the diaphragm of negative focal power and have positive focal power.Described front lens group is made up of first lens and second lens with positive light coke with negative power; Described rear lens group is made up of three the 3rd, the 5th, the 6th lens and the 4th lens with negative power with positive light coke.Use the present invention, can realize big relative aperture, high imaging definition and less eyeglass external diameter, help controlling the length overall of whole optical system, the various aberrations of effective correcting optical system, reach the above high definition requirement of mega pixel, be specially adapted to take into account day and night or monitoring and in-vehicle camera system that lighting condition is relatively poor.
Description
Technical field
The present invention relates to a kind of vehicle-mounted front view lens system, be particularly suitable for taking into account day and night or the monitoring that lighting condition is relatively poor and the Megapixels large aperture vehicle front view lens of in-vehicle camera system.
Background technology
Auto industry is developed to active safety gradually by passive security (as air bag) at present, vehicle-mounted front view lens is because the specific (special) requirements of installing and using, the front end bore of requirement camera lens can not be greater than rear end (depending on nearly image aspect puts), require the logical luminous energy power of camera lens strong, can adapt to the extraneous complex environment brightness conditions that changes, require camera lens that higher sharpness is arranged, can effectively discern the identification information in road trajectory and roadside, to satisfy the specific (special) requirements of active safety function, therefore, develop and a kind ofly adaptively have the vehicle-mounted forward sight of active safety function or a kind of high-performance optics camera lens of side-looking camera is the task of top priority.
Summary of the invention
Technical matters to be solved by this invention is to overcome above-mentioned technical deficiency and a kind of large aperture, high-resolution, the satisfactory high performance vehicle-mounted front view lens of physical dimension is provided, with reach the logical luminous energy power of camera lens strong, can adapt to external world's variation complex environment brightness conditions, effectively discern the identification information in road trajectory and roadside.
Technical matters of the present invention solves by following technical proposals:
A kind of Megapixels large aperture vehicle front view lens begins to be provided with successively front lens group, diaphragm and rear lens group from object space, it is characterized in that:
Described front lens group has negative focal power, and rear lens group has positive focal power;
Described its first lens of front lens group with negative focal power are the eyeglass with negative power of concave-concave, and second lens are the eyeglass with positive light coke of biconvex;
Described rear lens group with positive focal power is made up of four lens units, wherein the 3rd lens and the 6th lens are the eyeglass with positive light coke of biconvex, the 4th lens are the eyeglass with negative power of concave-concave, and the 5th lens are to have the positive bent moon eyeglass of the concave surface of positive light coke towards object space.
Described front lens group satisfies the following conditions formula:
-5 〉=F
Before/ F 〉=-78
F wherein
BeforeThe combined focal length value of expression front lens group, F represents whole group of focal length value of the optical system of described camera lens.
Described rear lens group satisfies the following conditions formula:
3.0 〉=F
After/ F 〉=1.0
F wherein
AfterThe combined focal length value of expression rear lens group, F represents whole group of focal length value of the optical system of described camera lens.
Described first lens element satisfies the following conditions formula:
Nd≤1.65，Vd≥55
Wherein Nd represents the d optical index of the first lens element material, and Vd represents the d light Abbe constant of the first lens element material.
Described first lens element satisfies the following conditions formula:
-0.9≥F
1/F≥-3.6
Wherein F1 represents the focal length value of first lens unit, and F represents whole group of focal length value of the optical system of described camera lens.
Described optical lens f-number will satisfy following formula: FNO≤1.8.
The optical length of described optical lens satisfies following condition:
5.0≥TTL/F≥2.5
Wherein, TTL represents the distance of the first lens object space side outermost point of described optical lens to the imaging focal plane, and F represents whole group of focal length value of the optical system of described camera lens.
The total field angle of described optical lens will satisfy following formula: 80 ° 〉=2 ω 〉=40 °.
Described first～the 6th lens all adopt glass material, and the material of second～the 6th lens is the glass material of high refraction.
Compared with prior art, lens configuration of the present invention can realize object lens of large relative aperture, high imaging definition and less eyeglass external diameter, on material selection, all adopt glass material, except that first lens, the glass material of the height refraction that all the other five lens use, help controlling the length overall TTL of whole optical system like this, the various aberrations of effective correcting optical system, reach the above high definition requirement of mega pixel, be specially adapted to require to take into account day and night or monitoring and in-vehicle camera system that lighting condition is relatively poor.
Description of drawings
Fig. 1 is a structural representation of the present invention.(object space is in left-most position, is in right-most position as the side)
Fig. 2 is chromatic curve figure of the present invention.
Fig. 3 is an astigmatism curve map of the present invention
Fig. 4 is distortion curve figure of the present invention.
Fig. 5 is a MTF curve map of the present invention.
Embodiment
Below with reference to accompanying drawing embodiments of the invention are described in detail again.
Megapixels large aperture vehicle front view lens, as shown in Figure 1, this optical lens begins to be provided with successively front lens group, diaphragm r5, rear lens group, color filter GF, imaging surface IMA from object space.
Described front lens group has negative focal power, is made up of the first lens L1 of the concave-concave eyeglass with negative power and the second eyeglass L2 with biconvex eyeglass of positive light coke.
Described rear lens group has positive focal power, is made up of four lens units, and focal power puts in order to positive and negative, just, just, and promptly prismatic glasses L3 and the 6th lens L6 are the eyeglass with positive light coke of biconvex; The 4th eyeglass L4 is the concave-concave eyeglass with negative power, and the 5th eyeglass L5 has the positive bent moon eyeglass of positive light coke concave surface towards object space.
In addition, the formula-5 〉=F that satisfies condition of described forward and backward lens group
Before/ F 〉=-78,3.0 〉=F
After/ F 〉=1.0.The focal power allocation proportion of the forward and backward lens of so reasonable control group, one side helps controlling the incident ray height of front lens group, can not be greater than the requirement of rear end with the front end bore that meets camera lens; Can reduce chief ray shooting angle on the other hand, to improve the relative brightness of optical system through rear lens group.
The material of first lens element formula Nd≤1.65 that satisfy condition, Vd 〉=55, divergence of beam is excessive behind the light process biconcave lens that lower refractive index can be avoided being come by object space, and the light that less material dispersion performance can effectively reduce three primary colors R, G, B separates, and promptly produces aberration.
The focal length of the first lens element formula-0.9 〉=F that satisfies condition
1/ F 〉=-3.6 make the outside dimension of first lens and aberration distribution obtain a balance preferably.
The diaphragm of camera lens is between described front lens group and rear lens group, because of having only 2 eyeglasses, front lens group forms, then lens group is made up of 4 eyeglasses, make the stop position of total system relatively near the object space end like this, can effectively control the external diameter size of front lens group on the one hand; Can reduce the FNO value (promptly improving relative aperture) of system on the other hand, to reach the large aperture requirement of FNO≤1.8.
Six lens of described camera lens all adopt glass material, and except that the material of first lens, the glass material of the height refraction that all the other five lens all use, help controlling the length overall TTL of whole optical system like this, simultaneously, the effective various aberrations of correcting optical system are to reach the high definition requirement more than the mega pixel.
Fig. 2 to Fig. 5 is the optical performance curve figure corresponding to case study on implementation, and wherein Fig. 2 is chromatic curve figure (also can be the spherical aberration curve map), represents that by F, d commonly used, the wavelength of C three coloured light unit is mm.Fig. 3 is the astigmatism curve map, represents that by F, d commonly used, the wavelength of C three coloured light unit is mm.Fig. 4 is distortion curve figure, represents the distortion sizes values under the different field angle situations, and unit is %.Fig. 5 is the MTF curve map, has represented the picture level of comprehensively separating of an optical system.
In the implementation case, the whole focal length value of this optical lens is F, f-number is FNO, field angle is 2 ω=60 °, camera lens length overall TTL=18.7mm, and begin by the object space side, with each minute surface number consecutively, the minute surface of the first eyeglass L1 is r1, r2, and the minute surface of the second eyeglass L2 is r3, r4, the diaphragm face is r5, the minute surface of prismatic glasses L3 is r6, r7, and the minute surface of the 4th eyeglass L4 is r8, r9, and the minute surface of the 5th eyeglass L5 is r10, r11, the minute surface of the 6th eyeglass L6 is r12, r13, and the minute surface of color filter GF is r14, r15.
F＝4.45mm，FNO＝1.5，2ω＝60°，TTL＝18.7mm
The optical parametric such as the table 1 of present embodiment:
Table 1
| The face sequence number | Radius-of-curvature r | Center thickness d | Refractive index Nd | Abbe |
| 1 | 12.06 | 0.7 | 1.51680 | 64.16 |
| 2 | 3.83 | 0.9 | ||
| 3 | 30.7 | 5.07 | 1.80400 | 46.57 |
| 4 | -9 | 0.1 | ||
| 5 | infinity | 0.07 | ||
| 6 | 5.96 | 2.38 | 1.72916 | 54.68 |
| 7 | -9.3 | 0.75 | ||
| 8 | 6.28 | 0.7 | 1.84666 | 23.82 |
| 9 | -6.28 | 0.67 | ||
| 10 | -17.16 | 1.32 | 1.80400 | 46.57 |
| 11 | -5.56 | 0.1 | ||
| 12 | 8.7 | 1.48 | 1.72916 | 54.68 |
| 13 | -29.38 | 0.6 | ||
| 14 | infinity | 0.55 | 1.51680 | 64.16 |
| 15 | infinity | |||
| IMA | infinity |
。
Claims (9)
1, a kind of Megapixels large aperture vehicle front view lens begins to be provided with successively front lens group, diaphragm and rear lens group from object space, it is characterized in that:
Described front lens group has negative focal power, and rear lens group has positive focal power;
Described its first lens of front lens group with negative focal power are the eyeglass with negative power of concave-concave, and second lens are the eyeglass with positive light coke of biconvex;
Described rear lens group with positive focal power is made up of four lens units, wherein the 3rd lens and the 6th lens are the eyeglass with positive light coke of biconvex, the 4th lens are the eyeglass with negative power of concave-concave, and the 5th lens are to have the positive bent moon eyeglass of the concave surface of positive light coke towards object space.
2, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that described front lens group satisfies the following conditions formula:
-5 〉=F
Before/ F 〉=-78
F wherein
BeforeThe combined focal length value of expression front lens group, F represents whole group of focal length value of the optical system of described camera lens.
3, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that described rear lens group satisfies the following conditions formula:
3.0 〉=F
After/ F 〉=1.0
F wherein
AfterThe combined focal length value of expression rear lens group, F represents whole group of focal length value of the optical system of described camera lens.
4, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that described first lens element satisfies the following conditions formula:
Nd≤1.65，Vd≥55
Wherein Nd represents the d optical index of the first lens element material, and Vd represents the d light Abbe constant of the first lens element material.
5, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that described first lens element satisfies the following conditions formula:
-0.9≥F
1/F≥-3.6
Wherein F1 represents the focal length value of first lens unit, and F represents whole group of focal length value of the optical system of described camera lens.
6, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that described optical lens f-number will satisfy following formula: FNO≤1.8.
7, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that the optical length of described optical lens satisfies following condition:
5.0≥TTL/F≥2.5
Wherein, TTL represents the distance of the first lens object space side outermost point of described optical lens to the imaging focal plane, and F represents whole group of focal length value of the optical system of described camera lens.
8, Megapixels large aperture vehicle front view lens as claimed in claim 1 is characterized in that the total field angle of described optical lens will satisfy following formula: 80 ° 〉=2 ω 〉=40 °.
9,, it is characterized in that described first～the 6th lens all adopt glass material, and the material of second～the 6th lens is the glass material of high refraction as each described Megapixels large aperture vehicle front view lens of claim 1～8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910099704 CN101587231B (en) | 2009-06-09 | 2009-06-09 | Megapixels large aperture vehicle front view lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910099704 CN101587231B (en) | 2009-06-09 | 2009-06-09 | Megapixels large aperture vehicle front view lens |
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| CN101587231A true CN101587231A (en) | 2009-11-25 |
| CN101587231B CN101587231B (en) | 2011-02-02 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103713380A (en) * | 2012-10-02 | 2014-04-09 | 大立光电股份有限公司 | Image System Lens Group |
| CN104360458A (en) * | 2014-12-01 | 2015-02-18 | 东莞市奥普特自动化科技有限公司 | Lens combined structure and machine vision camera with structure |
| CN106443974A (en) * | 2016-12-16 | 2017-02-22 | 福建福光光电科技有限公司 | F6mm all-pass day and night full-color high-definition fixed-focus lens |
| JP2018049188A (en) * | 2016-09-23 | 2018-03-29 | 富士フイルム株式会社 | Image capturing lens and image capturing device |
| CN108594402A (en) * | 2018-07-13 | 2018-09-28 | 协益电子（苏州）有限公司 | On-vehicle lens |
| CN109445067A (en) * | 2018-11-23 | 2019-03-08 | 江西联创电子有限公司 | Optical imaging lens and imaging device |
| WO2023116241A1 (en) * | 2021-12-22 | 2023-06-29 | 江西联创电子有限公司 | Optical imaging lens and imaging device |
Family Cites Families (4)
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| JPH10104509A (en) * | 1996-09-30 | 1998-04-24 | Matsushita Electric Ind Co Ltd | Wide angle lens group |
| JP5015657B2 (en) * | 2007-05-18 | 2012-08-29 | 富士フイルム株式会社 | Image pickup lens and image pickup apparatus including the image pickup lens |
| CN201172399Y (en) * | 2008-01-16 | 2008-12-31 | 深圳市名商实业有限公司 | Structure of vehicle-mounted CCD camera |
| CN201434930Y (en) * | 2009-06-09 | 2010-03-31 | 宁波舜宇车载光学技术有限公司 | Megapixel large aperture vehicle-mounted forward-looking camera lens |
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| CN103713380B (en) * | 2012-10-02 | 2016-03-23 | 大立光电股份有限公司 | Image system lens group |
| CN103713380A (en) * | 2012-10-02 | 2014-04-09 | 大立光电股份有限公司 | Image System Lens Group |
| CN104360458A (en) * | 2014-12-01 | 2015-02-18 | 东莞市奥普特自动化科技有限公司 | Lens combined structure and machine vision camera with structure |
| CN107870408B (en) * | 2016-09-23 | 2021-06-11 | 天津欧菲光电有限公司 | Imaging lens and imaging device |
| JP2018049188A (en) * | 2016-09-23 | 2018-03-29 | 富士フイルム株式会社 | Image capturing lens and image capturing device |
| CN107870408A (en) * | 2016-09-23 | 2018-04-03 | 富士胶片株式会社 | Imaging len and camera device |
| CN106443974A (en) * | 2016-12-16 | 2017-02-22 | 福建福光光电科技有限公司 | F6mm all-pass day and night full-color high-definition fixed-focus lens |
| CN106443974B (en) * | 2016-12-16 | 2019-01-04 | 福建福光光电科技有限公司 | A kind of f6mm all-pass light day night full-color high-definition fixed-focus camera lens |
| CN108594402A (en) * | 2018-07-13 | 2018-09-28 | 协益电子（苏州）有限公司 | On-vehicle lens |
| CN108594402B (en) * | 2018-07-13 | 2024-04-09 | 协益电子（苏州）有限公司 | Vehicle-mounted lens |
| CN109445067A (en) * | 2018-11-23 | 2019-03-08 | 江西联创电子有限公司 | Optical imaging lens and imaging device |
| US11550124B2 (en) | 2018-11-23 | 2023-01-10 | Jiangxi Lianchuang Electronic Co., Ltd. | Camera lens including six lenses of −++−++ refractive powers, camera module and vehicle |
| WO2023116241A1 (en) * | 2021-12-22 | 2023-06-29 | 江西联创电子有限公司 | Optical imaging lens and imaging device |
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