CN204009198U - The low distortion campaign of a kind of high definition wide-angle DV camera lens - Google Patents
The low distortion campaign of a kind of high definition wide-angle DV camera lens Download PDFInfo
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- CN204009198U CN204009198U CN201420188232.XU CN201420188232U CN204009198U CN 204009198 U CN204009198 U CN 204009198U CN 201420188232 U CN201420188232 U CN 201420188232U CN 204009198 U CN204009198 U CN 204009198U
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Abstract
The utility model discloses the low distortion campaign of a kind of high definition wide-angle DV camera lens.This camera lens comprises first lens element, the second lens element, the 3rd lens element, aperture member, the 4th lens element, the 5th lens element and the 6th lens element that starts to set gradually from object space; Wherein: first lens element is to have positive focal power the protruding curved month type eyeglass to object space; The second lens element is to have positive focal power the protruding curved month type eyeglass to object space; The 3rd lens element is the biconvex eyeglass with positive focal power; The 4th lens element is the biconvex eyeglass with positive focal power; The 5th lens element is the biconvex eyeglass with positive focal power; The 6th lens element is to have negative focal power the protruding curved month type eyeglass to image space.Adopt 6 eyeglasses, reach gratifying optical characteristics, 166 °, super wide-angle diagonal angle, simultaneously TV distortion only 15%, camera lens overall length TTL approaches 22.8mm, can meet the special applications requirement of DV.
Description
Technical field
The utility model relates to a kind of DV camera lens, relates in particular to the low distortion campaign of a kind of high definition wide-angle DV camera lens.
Background technology
Along with the development of camera lens and electronic technology, camera lens is no longer merely confined in camera system.Except traditional DV takes, camera lens also starts under the various video acquisition environment for other.The for example shooting of supervisory system to surrounding environment, various vehicle fittings comprise passenger vehicle in automobile, lorry, motorcycle etc., security in order to ensure driver when carrying out reverse action, avoid causing damage with car, people or other object collision, therefore at vehicle rear, install original the wide-angle lens for camera, picture by this camera lens picked-up external object, is transmitted and watched judgement by be allowed the driver who is sitting in pilothouse by circuit, guarantees the safety between vehicle and other object.But the wide-angle lens that in-vehicle camera is used at present, the general glass mirror composition adopting more than 8 or 8, this wide-angle lens not only weight is heavier, cost is higher, and after field angle surpasses 90 °, distortion will be very serious, for this reason, the wide-angle lens of a lot of optics enterprise developments adopts aspheric surface technology, with weight reduction, cost and Reducing distortion amount, but the logical optical property of this camera lens a little less than, particularly along with the minimizing of eyeglass quantity, lens length is shorter, is not suitable for generally lens length being had the DV system of particular requirement.
Utility model content
The utility model proposes the high definition DV camera lens of a kind of super wide-angle, low distortion, low distortion.
For realizing above-mentioned relating to, the utility model adopts with following technical proposals:
The low distortion campaign of a high definition wide-angle DV camera lens, comprises the first lens element, the second lens element, the 3rd lens element, aperture member, the 4th lens element, the 5th lens element and the 6th lens element that from object space, start to set gradually; Wherein:
First lens element is to have positive focal power the protruding curved month type eyeglass to object space;
The second lens element is to have positive focal power the protruding curved month type eyeglass to object space;
The 3rd lens element is the biconvex eyeglass with positive focal power;
The 4th lens element is the biconvex eyeglass with positive focal power;
The 5th lens element is the biconvex eyeglass with positive focal power;
The 6th lens element is to have negative focal power the protruding curved month type eyeglass to image space.
Wherein, first lens element meets condition formula below:
Nd≥1.58，Vd≥60.08，
Wherein Nd represents the d optical index of first lens element material, and Vd represents the d light Abbe constant of first lens element material.
Wherein, the second lens element meets condition formula below:
Nd≥1.67，Vd≥43.95，
Wherein Nd represents the d optical index of the second lens element material, and Vd represents the d light Abbe constant of the second lens element material.
Wherein, first lens element and the second lens element meet condition formula below:
1.80≥F1/F2≥1.40，
Wherein F1 represents the focal length value of first lens element, and F2 represents the focal length value of the second lens element.
Wherein, the 3rd lens element and the 4th lens element meet condition formula below:
1.9≥F3/F4≥1.3，
Wherein F3 represents the focal length value of the 3rd lens element, and F4 represents the focal length value of the 4th lens element.
Wherein, the 5th lens element meets condition formula below:
1.85≥F5/F≥1.25，
Wherein F5 represents the focal length value of the 5th lens element, and F represents the whole focal length value of the low distortion campaign of high definition wide-angle DV camera lens.
Wherein, the total field angle ω of the low distortion campaign of high definition wide-angle DV camera lens meets following formula: 2 ω=120 ~ 170 °.
Wherein, the first lens element object space side outermost point of the low distortion campaign of high definition wide-angle DV camera lens to the distance of imaging surface will meet following formula: TTL >=22.10 mm.
Wherein, first lens element, the second lens element, the 3rd lens element, the 4th lens element, the 5th lens element and the 6th lens element are glass lens element.
The beneficial effects of the utility model are: adopt 6 eyeglasses, get final product the aberration in effective correcting optical system, reach gratifying optical characteristics and wider total field angle, 166 °, super wide-angle diagonal angle, also have low distortion simultaneously, TV distortion only 15%, camera lens overall length TTL approaches 22.8mm, the camera lens requirement of 500W pixel scale can be realized, the special applications requirement of DV can be met.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during the utility model embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to the content of the utility model embodiment and these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model (object space 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 map of the present utility model.
Embodiment
For making technical matters that the utility model solves, the technical scheme of employing and the technique effect that reaches are clearer, below in conjunction with accompanying drawing, the technical scheme of the utility model embodiment is described in further detail, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those skilled in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, it is the structural representation of the low distortion campaign of a kind of high definition wide-angle of the utility model DV camera lens, and it is applied to the video capture devices such as DV especially.As shown in Figure 1, camera lens comprises first lens element L1, the second lens element L2, the 3rd lens element L3, aperture member R7, the 4th lens element L4, the 5th lens element L5 and the 6th lens element L6 that starts to set gradually from object space; Wherein:
First lens element L1 has positive focal power the protruding curved month type eyeglass to object space;
The second lens element L2 has positive focal power the protruding curved month type eyeglass to object space;
The 3rd lens element L3 is the biconvex eyeglass with positive focal power;
The 4th lens element L4 is the biconvex eyeglass with positive focal power;
The 5th lens element L5 is the biconvex eyeglass with positive focal power;
The 6th lens element L6 has negative focal power the protruding curved month type eyeglass to image space.
Preferably, first lens element L1 meets condition formula below:
Nd≥1.58，Vd≥60.08，
Wherein Nd represents the d optical index of first lens element L1 material, and Vd represents the d light Abbe constant of first lens element L1 material.
The utility model first lens element L1 adopts refractive index Nd >=1.58, and the high-refractivity and low-dispersion material of Abbe constant Vd >=60.08 can effectively import 150 ° of more than field angle light and reduce the bore of first eyeglass, to avoid volume excessive.
Wherein, the second lens element L2 meets condition formula below:
Nd≥1.67，Vd≥43.95，
Wherein Nd represents the d optical index of the second lens element L2 material, and Vd represents the d light Abbe constant of the second lens element L2 material.
The second lens element L2 adopts refractive index Nd >=1.67, the high chromatic dispersion material of high index of refraction of Abbe constant Vd >=43.95.
Preferably, first lens element L1 and the second lens element L2 meet condition formula below:
1.80≥F1/F2≥1.40，
Wherein F1 represents the focal length value of first lens element L1, and F2 represents the focal length value of the second lens element L2.
The focal length value of first lens element L1 and the second lens element L2 will meet formula 1.80 >=F1/F2 >=1.40.
Preferably, the 3rd lens element L3 and the 4th lens element L4 meet condition formula below:
1.9≥F3/F4≥1.3，
Wherein F3 represents the focal length value of the 3rd lens element L3, and F4 represents the focal length value of the 4th lens element L4.
The focal length value of the 3rd lens element L3 and the 4th lens element L4 will meet formula 1.9 >=F3/F4 >=1.3.
Wherein, the 5th lens element L5 meets condition formula below:
1.85≥F5/F≥1.25，
Wherein F5 represents the focal length value of the 3rd lens element L5, and F represents the whole focal length value of the low distortion campaign of high definition wide-angle DV camera lens.
When the whole focal length value of DV camera lens is F, when the 5th lens element L5 focal length is F5,1.85 >=F5/F >=1.25 that must satisfy condition, the TTL length of this condition major control camera lens.
Wherein, the total field angle ω of the low distortion campaign of high definition wide-angle DV camera lens meets following formula: 2 ω=120 ~ 170 °.
Wherein, the first lens element L1 object space side outermost point of the low distortion campaign of high definition wide-angle DV camera lens to the distance of imaging surface will meet following formula: TTL >=22.10 mm.
Wherein, first lens element L1, the second lens element L2, the 3rd lens element L3, the 4th lens element L4, the 5th lens element L5 and the 6th lens element L6 are glass lens element.
The first lens element L1 of DV camera lens adopts glass mirror, can effectively protect in use scratch resistant scrape along opposing rugged environment variable effect of DV camera lens, the 3rd lens element L3 adopts high-dispersion glass eyeglass, the aberration of energy effective compensation optical system, and only use 6 sheet glass eyeglasses to replace the design of traditional 7G or 8G, can reduce eyeglass quantity and weight on the one hand, and reduce costs; The effective aberration in correcting optical system, reaches gratifying optical characteristics and wider total field angle by minimum eyeglass quantity on the other hand.166 °, super wide-angle diagonal angle also has low distortion simultaneously, TV distortion only 15%, and camera lens overall length TTL approaches 22.8mm, can realize the camera lens requirement of 500W pixel scale, can meet the special applications requirement of DV.
In the implementation case, the whole focal length value of this DV camera lens is F, f-number is F/NO, field angle is 2 ω=166 °, camera lens overall length TTL approaches 22mm, and started by object space side, by each minute surface number consecutively, the curvature mirror radius of first lens element L1 is R1, R2, the curvature mirror radius of the second lens element L2 is R3, R4, the curvature mirror radius of the 3rd lens element L3 is R5, R6, diaphragm face is R7, the curvature mirror radius of the 4th lens element L4 is R8, R9, the curvature mirror radius of the 5th lens element L5 is R10, R11, the curvature mirror radius of the 5th lens element L5 is R12, R13, the minute surface of color filter IR is R14, R15.R11 wherein and R12 overlap, and corresponding to 11 of following table, R13, R14 and R15 be 12,13 and 14 in corresponding following table successively.
The utility model F=2.80mm, F/NO=2.8,2 ω=166 °, TTL=22.80mm ± 0.3mm
The utility model optical system parameter table is in Table 1:
Table 1
Fig. 2 is the imaging process schematic diagram corresponding to the present embodiment, Fig. 3 to Fig. 6 is the optical performance curve figure corresponding to the present embodiment, and wherein Fig. 3 is chromatic curve figure (also can be spherical aberration curve map), by the F commonly using, d. C tri-look light wavelengths represent, unit is mm.Fig. 4 is astigmatism curve map, and by the F commonly using, d. C tri-look light wavelengths represent, unit is InIn.Fig. 5 is distortion curve figure, represents the distortion sizes values in different field angle situations, and unit is %.Fig. 6 is MTF curve map, has represented that the comprehensive solution of an optical system is as level.As seen from the figure, this DV camera lens by various optical aberration correctings to being enough to practical level.
In actual optical performance test process, optical specification is:
1.Sensor Size： 1/2.5″ (Φmax=8.0mm For MI5100)
2.Focal Length(EFL)： f=2.80mm
3.F/N0(Infinite)： F/N0=2.8
4.Back Focal Length： BFL=5.96mm
5.Flange Back Length： FB=4.86mm
6.TTL： TTL=22.80mm±0.3mm
7.Field of View： Diagonal = 166°
Horizontal = 130°
Vertical = 98°
8.TV Distortion： -15 %
9.Thread Size： M12*P0.5
10.Element： 6G+IR
11.IR Spec： T=50% @ 648±10nm
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (8)
1. the low distortion campaign of a high definition wide-angle DV camera lens, it is characterized in that, comprise the first lens element, the second lens element, the 3rd lens element, aperture member, the 4th lens element, the 5th lens element and the 6th lens element that from object space, start to set gradually; Wherein:
First lens element is to have positive focal power the protruding curved month type eyeglass to object space;
The second lens element is to have positive focal power the protruding curved month type eyeglass to object space;
The 3rd lens element is the biconvex eyeglass with positive focal power;
The 4th lens element is the biconvex eyeglass with positive focal power;
The 5th lens element is the biconvex eyeglass with positive focal power;
The 6th lens element is to have negative focal power the protruding curved month type eyeglass to image space;
Wherein, first lens element meets condition formula below:
Nd≥1.58，Vd≥60.08，
Wherein Nd represents the d optical index of first lens element material, and Vd represents the d light Abbe constant of first lens element material.
2. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1, it is characterized in that, the second lens element meets condition formula below:
Nd≥1.67，Vd≥43.95，
Wherein Nd represents the d optical index of the second lens element material, and Vd represents the d light Abbe constant of the second lens element material.
3. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1, it is characterized in that, first lens element and the second lens element meet condition formula below:
1.80≥F1/F2≥1.40，
Wherein F1 represents the focal length value of first lens element, and F2 represents the focal length value of the second lens element.
4. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1, it is characterized in that, the 3rd lens element and the 4th lens element meet condition formula below:
1.9≥F3/F4≥1.3，
Wherein F3 represents the focal length value of the 3rd lens element, and F4 represents the focal length value of the 4th lens element.
5. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1, it is characterized in that, the 5th lens element meets condition formula below:
1.85≥F5/F≥1.25，
Wherein F5 represents the focal length value of the 5th lens element, and F represents the whole focal length value of the low distortion campaign of high definition wide-angle DV camera lens.
6. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1, it is characterized in that, the total field angle ω of the low distortion campaign of high definition wide-angle DV camera lens meets following formula: 2 ω=120 ~ 170 °.
7. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1, it is characterized in that, the first lens element object space side outermost point of the low distortion campaign of high definition wide-angle DV camera lens to the distance of imaging surface will meet following formula: TTL >=22.10 mm.
8. according to the low distortion campaign of a kind of high definition wide-angle DV camera lens of claim 1 ~ 7 any one, it is characterized in that, first lens element, the second lens element, the 3rd lens element, the 4th lens element, the 5th lens element and the 6th lens element are glass lens element.
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| CN201420188232.XU CN204009198U (en) | 2014-04-17 | 2014-04-17 | The low distortion campaign of a kind of high definition wide-angle DV camera lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI582483B (en) * | 2015-10-12 | 2017-05-11 | 今國光學工業股份有限公司 | Six-Piece Wide-Angle Lens Module |
| CN107153249A (en) * | 2016-11-10 | 2017-09-12 | 嘉兴中润光学科技有限公司 | A kind of vehicle-mounted back vision wide-angle lens |
| CN109828348A (en) * | 2018-12-27 | 2019-05-31 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| US11782238B2 (en) | 2016-07-05 | 2023-10-10 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing apparatus and electronic device |
-
2014
- 2014-04-17 CN CN201420188232.XU patent/CN204009198U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI582483B (en) * | 2015-10-12 | 2017-05-11 | 今國光學工業股份有限公司 | Six-Piece Wide-Angle Lens Module |
| US11782238B2 (en) | 2016-07-05 | 2023-10-10 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing apparatus and electronic device |
| CN107153249A (en) * | 2016-11-10 | 2017-09-12 | 嘉兴中润光学科技有限公司 | A kind of vehicle-mounted back vision wide-angle lens |
| CN107153249B (en) * | 2016-11-10 | 2020-01-21 | 嘉兴中润光学科技有限公司 | Wide-angle lens for vehicle-mounted rear view |
| CN109828348A (en) * | 2018-12-27 | 2019-05-31 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20170417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |