CN103969797A - Aspheric high-definition front wide-angle lens - Google Patents
Aspheric high-definition front wide-angle lens Download PDFInfo
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- CN103969797A CN103969797A CN201310565430.3A CN201310565430A CN103969797A CN 103969797 A CN103969797 A CN 103969797A CN 201310565430 A CN201310565430 A CN 201310565430A CN 103969797 A CN103969797 A CN 103969797A
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- aspheric surface
- angle lens
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Abstract
The invention relates to the technical field of optical devices, in particular to an aspheric high-definition front wide-angle lens which is used for a 2-megapixel camera module of a mobile phone. The aspheric high-definition front wide-angle lens is of a structure with a front diaphragm and three aspheric plastic lenses, is in a special aspheric combination design, and accordingly has the advantages of small module size, wide field angles, high product yield, good imaging effect and low cost.
Description
Technical field
The present invention relates to field of optical device technology, relate in particular to a kind of preposition wide-angle lens of aspheric surface high definition for mobile phone 2,000,000 pixel camera head mould groups.
Background technology
After 2013 start, from smart mobile phone processor to display screen, again to camera, even to the each related accessory of mobile phone, all present the at a high speed competition situation of upgrading.Because the flagship mobile phone configuration of current each brand is all similar, therefore finding product differentiation just becomes a thing of racking one's brains.And in some nearest mobile phone new products, we seem to find that manufacturer particularly payes attention to for mobile phone front-facing camera.
At the initial stage of being born at front-facing camera, its pixel is also 100,000,300,000 such levels, and out the image quality of photo is really so tragic that one cannot bear to look at it.Especially when autodyne night, be not fuzzy be exactly noise, add the not convenience that uses post-positioned pick-up head to autodyne, auto heterodyne gang is more and more higher to the front-facing camera mobile phone cry of high pixel, makes front-facing camera become users to purchase an important parameter of machine.In order to meet consumers' demand, strive for more iron users, the mobile phone that configures high pixel front-facing camera becomes more and more urgent.Therefore, under within 2012, first many mobile phone brand factories incite somebody to action in succession, the preposition VGA lens changing of intelligent mobile phone is that (resolution specification is 1 to HD high image quality camera lens, 280x720), the 4th season in 2012 is caused apple (Apple) iPhone 5 of upsurge of panic buying in the whole world, its preposition camera lens is also the high image quality camera lens that adopts the video recording that can accomplish 720p HD.Visible, the preposition and rearmounted camera lens that simultaneously has high-quality has become development and the fashion trend of mobile phone.
Existing preposition camera lens technology, how to meet lens assembly under high-and low-temperature resistance environment in high-quality imaging effect, also possesses good processing and manufacturing ability, and further reduce the production cost of lens assembly, all become the satisfied requirement of optical lens assembly design needs to be applicable to producing in enormous quantities waiting.But existing preposition 2M product still exists pixel cell larger, modular volume is larger, and field angle is less, and product yields is low, and imaging effect is poor, the shortcoming that cost is higher.
Summary of the invention
The object of the invention is to provides a kind of aspheric surface high definition preposition wide-angle lens for the deficiencies in the prior art, has modular volume less, and the larger product yields of field angle is high, and imaging effect is good, lower-cost advantage.
For achieving the above object, the present invention is achieved through the following technical solutions.
The preposition wide-angle lens of a kind of aspheric surface high definition, it comprises the diaphragm, lenses one, lenses two, lenses three and the glass filter that are arranged in order to imaging side from object side, and it adopts diaphragm preposition, and diaphragm is positioned at face order one side of lenses one; Described lenses one, lenses two and lenses three are aspheric surface plastic lens, and the two sides of eyeglass is even aspheric surface; The aspheric surface formula of described lenses one, lenses two and lenses three is:
Wherein, z represents the Z coordinate figure of lens surface each point, and r represents the Y axial coordinate value of each point on lens surface, the inverse of the radius of curvature R that c is lens surface, and k is circular cone coefficient, α
1, α
2, α
3, α
4, α
5, α
6, α
7, α
8for high-order asphericity coefficient;
Wherein, the center of lens thickness T C of described lenses one is 0.29 ~ 0.33mm, and the center of lens thickness T C of lenses two is 0.507 ~ 0.527mm, and the center of lens thickness T C of lenses three is 0.26 ~ 0.29mm.
Preferably, the center of lens thickness T C of described lenses one, and clearance thickness A C between lenses one and lenses two, its ratio TC/AC=0.7 ~ 1.0.
Preferably, the center of lens thickness T C of described lenses three, and clearance thickness A C between lenses two and lenses three, its ratio TC/AC=2 ~ 3.
Preferably, the effective focal length f1 of described lenses one, and the effective focal length f of whole lens assembly, its ratio f1/f=1.5 ~ 1.6.
Preferably, the radius of curvature R 2 of the face order two of described lenses one, and the radius of curvature R 1 of face order one, its ratio R 2/R1=5.0 ~ 5.2.
Preferably, the material of described lenses one and lenses two is ZEONEX series, and lenses three is selected the material that refractive index is higher and dispersion is lower than ZEONEX series.
Beneficial effect of the present invention is: the preposition wide-angle lens of a kind of aspheric surface high definition of the present invention, adopt the structure of the preposition and three aspheric surface plastic lens of diaphragm, by special aspheric surface composite design, there is modular volume less, the larger product yields of field angle is high, imaging effect is good, lower-cost advantage.
Brief description of the drawings
Utilize accompanying drawing to be further detailed the present invention below, but the embodiment in accompanying drawing does not form any limitation of the invention.
Fig. 1 is structural representation of the present invention.
Fig. 2 is image formation by rays schematic diagram of the present invention.
Fig. 3 is MTF schematic diagram of the present invention.
Fig. 4 is the curvature of field of the present invention, distortion schematic diagram.
Fig. 5 is disc of confusion schematic diagram of the present invention.
Fig. 6 is relative exposure schematic diagram of the present invention.
Embodiment
Below in conjunction with concrete embodiment, the present invention will be described.
As shown in Figures 1 to 6, the preposition wide-angle lens of a kind of aspheric surface high definition, it comprises the diaphragm 6, lenses 1, lenses 22, lenses 33 and the glass filter 4 that are arranged in order from object side to imaging side 5, it adopts diaphragm 6 preposition, and diaphragm 6 is positioned at face order one 10 sides of lenses 1; Described lenses 1, lenses 22 and lenses 33 are aspheric surface plastic lens, and the two sides of eyeglass is even aspheric surface.Said lens system is in the time carrying out work, and the light coming from object space forms image at imaging plane successively after lenses 1, lenses 22, lenses 33 and glass filter 4.
With shown in Fig. 2, in the present embodiment, described lenses 1 is meniscus as shown in Figure 1, and convex surface is towards object space, and concave surface is towards image space; Described lenses 22 is concave-convex lens, and concave surface is towards object space, and convex surface is towards image space; Described lenses 33 is meniscus, and convex surface is towards object space, and concave surface is towards image space, and further, the face order 5 30 of lenses 33 presents waveform.The present invention adopts the structure of three aspheric surface plastic lens, the feature of this non-spherical lens is, continually varying from lens center to periphery curvature, the spherical lens of certain curvature is different from having from lens center to periphery, non-spherical lens has better radius-of-curvature characteristic, have advantages of to improve and distort aberration and improve astigmatic image error, can make the visual field become larger and true, therefore, adopt after non-spherical lens, can eliminate as much as possible the aberration occurring in imaging, thereby improve image quality.
In the present embodiment, the aspheric surface formula of described lenses 1, lenses 22 and lenses 33 is:
Wherein, z represents the Z coordinate figure of lens surface each point, and r represents the Y axial coordinate value of each point on lens surface, the inverse of the radius of curvature R that c is lens surface, and k is circular cone coefficient, α
1, α
2, α
3, α
4, α
5, α
6, α
7, α
8for high-order asphericity coefficient.As preferred embodiment, the front surface of described lenses 1, lenses 22 and lenses 33 and the face shape parameter of rear surface are as follows respectively, and unit is mm:
One 10 orders 2 11 of one 1 orders of lenses
c 1/ 1.12301050061081 1/5.77933603671751
k -0.5348355513811 20.82927974187
α
1 0
0
α
2 -0.05927621183887 0.3625019330408
α
3 1.037157243344 -6.376752018275
α
4 21.08247731159 85.37058307542
α
5 -346.5059508312 -569.3162839368
α
6 1429.368351038
2233.195739647
α
7 1651.537876616 -3504.578134213
α
8 -14256.63877551 -1003.307410193
3 20 orders 4 21 of 22 orders of lenses
c 1/ -1.11971566769909 1/ -0.540218348069324
k 2.618694236349 -0.4237153056021
α
1 0
0
α
2 -0.5779741840801 0.2423788206846
α
3 6.106744634073 -0.05599079433399
α
4 -79.16581747022 3.68164289308
α
5 452.9374450042 -11.96783158718
α
6 -956.9100314904
1.564507520046
α
7 715.0933009218 84.8512827075
α
8 121.7427830292 -61.78249555517
5 30 orders 6 31 of 33 orders of lenses
c 1/ 1.24444325695532 1/ 0.586891577503744
k -19.02281018649 -4.01786443781
α
1 0
0
α
2 -0.7447450251194 -0.9074055142427
α
3 -0.03531732094221 1.683625023203
α
4 4.548569708746 -1.903643771291
α
5 -9.825834525365 0.8728470618774
α
6 4.943739068056
0.2955735152371
α
7 6.835902349721 -0.4531104535668
α
8 -6.895735267678 0.1158429510333
Wherein, preferred, the material of described lenses 1 and lenses 22 is ZEONEX series, such as ZEONEX-E48R etc.The material that refractive index is higher and dispersion is lower that described lenses 33 is selected than ZEONEX series, for example Polycarb or OKP4 series all can, can effectively reduce the optics effective diameter of lenses 33, make its optics effective diameter be less than 2.5mm, realize subminiaturization thereby be conducive to whole lens assembly contour structures.
In the present embodiment, in order to reach better distortion and the chief ray shooting angle of reduction system, improve the imaging effect of whole arrangement of mirrors head, need to specifically design described lenses 1, lenses 22 and lenses 33, specific as follows: one, preferred, the center of lens thickness T C of described lenses 1 is 0.29 ~ 0.33mm, the center of lens thickness T C of lenses 22 is 0.507 ~ 0.527mm, the center of lens thickness T C of lenses 33 is 0.26 ~ 0.29mm, can effectively shorten lens optical overall length much smaller than 2.8mm.Two, preferred, the center of lens thickness T C of described lenses 1, and clearance thickness A C between lenses 1 and lenses 22, its ratio TC/AC=0.7 ~ 1.0, the TV distortion value that can be conducive to control lens group is within the scope of specification value.Three, preferred, the center of lens thickness T C of described lenses 33, and clearance thickness A C between lenses 22 and lenses 33, its ratio TC/AC=2 ~ 3, contribute to regulate the centrality of MTF curve S/T direction, be more conducive to management and control camera lens entirety picture element.Four, preferred, the effective focal length f1 of described lenses 1, and the effective focal length f of whole lens assembly, its ratio f1/f=1.5 ~ 1.6, the effective focal length f of control lens assembly, ensures that the field angle of lens assembly is greater than 80 °.Five, preferred, the radius of curvature R 2 of the face order 2 11 of described lenses 1, and the radius of curvature R 1 of face order 1, its ratio R 2/R1=5.0 ~ 5.2, the deviation of adjusting mirror sheet material refractive index actual value and theoretical value, and effectively reduce the impact of moulding process.
From accompanying drawing 1 ~ 6 and embodiment, can find out that the preposition wide-angle lens of a kind of aspheric surface high definition of the present invention has following features:
1, adopt diaphragm 6 preposition, when ensureing systematic eccentricity tilt sensitive degree, improve center view field imaging quality, reach the high definition image quality of 2,000,000 pixels.
2, use the resin material of general high-refractivity and low-dispersion on the market to replace glass, the stable and technical maturity of forming technique, has solved the processing difficulties of glass mirror and the production efficiency that causes is low and the higher problem of cost; Each face type of eyeglass is aspheric setting simultaneously, can effectively eliminate all kinds of aberrations, obtains good imaging effect.
3, camera lens overall length foreshortens in 2.8mm, and the optics effective diameter of eyeglass three is less than 2.5mm, realizes the Superminiature structure within the scope of M4-M5 thereby be conducive to whole lens assembly; Field angle reaches 80 degree, and large picture, caters to mobile lens recent development trend, meets the needs of the preposition wide-angle lens of current mobile phone market high definition.
4, the disc of confusion size of camera lens from visual field, center to 0.8 visual field is all within the twice numerical range of 1/6.5 inch of single pixel grain size of specification image sensor COMS chip, the chief ray angle of the outer visual field of axle is less than 29 °, meet the requirement of image sensor CMOS chip to light receptivity scope, make it to have the features such as imaging sharpness is high, color is clearly demarcated, and color reducibility is good.
Above content is only preferred embodiment of the present invention, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
Claims (6)
1. the preposition wide-angle lens of aspheric surface high definition, it is characterized in that: it comprises the diaphragm (6), lenses one (1), lenses two (2), lenses three (3) and the glass filter (4) that are arranged in order from object side to imaging side (5), it adopts diaphragm (6) preposition, and diaphragm (6) is positioned at face order one (10) side of lenses one (1); Described lenses one (1), lenses two (2) and lenses three (3) are aspheric surface plastic lens, and the two sides of eyeglass is even aspheric surface; The aspheric surface formula of described lenses one (1), lenses two (2) and lenses three (3) is:
Wherein, z represents the Z coordinate figure of lens surface each point, and r represents the Y axial coordinate value of each point on lens surface, the inverse of the radius of curvature R that c is lens surface, and k is circular cone coefficient, α
1, α
2, α
3, α
4, α
5, α
6, α
7, α
8for high-order asphericity coefficient;
Wherein, the center of lens thickness T C of described lenses one (1) is 0.29 ~ 0.33mm, and the center of lens thickness T C of lenses two (2) is 0.507 ~ 0.527mm, and the center of lens thickness T C of lenses three (3) is 0.26 ~ 0.29mm.
2. the preposition wide-angle lens of a kind of aspheric surface high definition according to claim 1, it is characterized in that: the center of lens thickness T C of described lenses one (1), and clearance thickness A C between lenses one (1) and lenses two (2), its ratio TC/AC=0.7 ~ 1.0.
3. the preposition wide-angle lens of a kind of aspheric surface high definition according to claim 1, it is characterized in that: the center of lens thickness T C of described lenses three (3), and clearance thickness A C between lenses two (2) and lenses three (3), its ratio TC/AC=2 ~ 3.
4. the preposition wide-angle lens of a kind of aspheric surface high definition according to claim 1, is characterized in that: the effective focal length f1 of described lenses one (1), and the effective focal length f of whole lens assembly, its ratio f1/f=1.5 ~ 1.6.
5. the preposition wide-angle lens of a kind of aspheric surface high definition according to claim 1, is characterized in that: the radius of curvature R 2 of the face order two (11) of described lenses one (1), and the radius of curvature R 1 of face order one (10), its ratio R 2/R1=5.0 ~ 5.2.
6. the preposition wide-angle lens of a kind of aspheric surface high definition according to claim 1, it is characterized in that: the material of described lenses one (1) and lenses two (2) is ZEONEX series the material that refractive index is higher and dispersion is lower that lenses three (3) is selected than ZEONEX series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310565430.3A CN103969797B (en) | 2013-11-13 | 2013-11-13 | A kind of preposition wide-angle lens of aspheric surface high definition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310565430.3A CN103969797B (en) | 2013-11-13 | 2013-11-13 | A kind of preposition wide-angle lens of aspheric surface high definition |
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| CN103969797A true CN103969797A (en) | 2014-08-06 |
| CN103969797B CN103969797B (en) | 2016-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166221A (en) * | 2014-08-29 | 2014-11-26 | 东莞市旭业光电科技有限公司 | Optical lens assembly |
| CN109196519A (en) * | 2018-08-21 | 2019-01-11 | 深圳市汇顶科技股份有限公司 | Lens system, fingerprint identification device and terminal device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828355A (en) * | 2005-03-01 | 2006-09-06 | 柯尼卡美能达精密光学株式会社 | Taking lens system |
| CN1982933A (en) * | 2005-12-16 | 2007-06-20 | 里程碑株式会社 | Imaging lens |
| US20110194013A1 (en) * | 2010-02-09 | 2011-08-11 | Largan Precision Co., Ltd. | Imaging lens system |
| US20130163098A1 (en) * | 2011-12-26 | 2013-06-27 | Chun Sheng Lee | Three-piece optical lens system |
| TWM462376U (en) * | 2013-05-10 | 2013-09-21 | Ability Opto Electronics Technology Co Ltd | Three sheets type imaging mirror head module |
| CN203616523U (en) * | 2013-11-13 | 2014-05-28 | 东莞市旭业光电科技有限公司 | Aspheric high-definition front wide angle lens |
-
2013
- 2013-11-13 CN CN201310565430.3A patent/CN103969797B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828355A (en) * | 2005-03-01 | 2006-09-06 | 柯尼卡美能达精密光学株式会社 | Taking lens system |
| CN1982933A (en) * | 2005-12-16 | 2007-06-20 | 里程碑株式会社 | Imaging lens |
| US20110194013A1 (en) * | 2010-02-09 | 2011-08-11 | Largan Precision Co., Ltd. | Imaging lens system |
| US20130163098A1 (en) * | 2011-12-26 | 2013-06-27 | Chun Sheng Lee | Three-piece optical lens system |
| TWM462376U (en) * | 2013-05-10 | 2013-09-21 | Ability Opto Electronics Technology Co Ltd | Three sheets type imaging mirror head module |
| CN203616523U (en) * | 2013-11-13 | 2014-05-28 | 东莞市旭业光电科技有限公司 | Aspheric high-definition front wide angle lens |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166221A (en) * | 2014-08-29 | 2014-11-26 | 东莞市旭业光电科技有限公司 | Optical lens assembly |
| CN109196519A (en) * | 2018-08-21 | 2019-01-11 | 深圳市汇顶科技股份有限公司 | Lens system, fingerprint identification device and terminal device |
| CN109196519B (en) * | 2018-08-21 | 2020-11-17 | 深圳市汇顶科技股份有限公司 | Lens system, fingerprint identification device and terminal equipment |
| US11366290B2 (en) | 2018-08-21 | 2022-06-21 | Shenzhen GOODIX Technology Co., Ltd. | Lens system, fingerprint identification apparatus and terminal device |
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| Publication number | Publication date |
|---|---|
| CN103969797B (en) | 2016-06-15 |
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Address after: 523000 Guangdong province Dongguan City Shipai town of Fulong Industrial Zone Second Road two Applicant after: Guangdong Xu Ye Optoelectronics Technology incorporated company Address before: 523000 Guangdong Province, Dongguan City Shipai Town Industrial Zone seven second Fulong road Dongguan xuye Photoelectric Technology Co. Ltd. Applicant before: Dongguan Xuye Photoelectric Technology Co.,Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: DONGGUAN XUYE OPTOELECTRONIC TECHNOLOGY CO., LTD. TO: GUANGDONG XUYE OPTOELECTRONICS TECHNOLOGY CO., LTD. |
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