CN104020550B - A kind of phtographic lens - Google Patents
A kind of phtographic lens Download PDFInfo
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- CN104020550B CN104020550B CN201410076135.6A CN201410076135A CN104020550B CN 104020550 B CN104020550 B CN 104020550B CN 201410076135 A CN201410076135 A CN 201410076135A CN 104020550 B CN104020550 B CN 104020550B
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- 230000000007 visual effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 230000005499 meniscus Effects 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000011982 device technology Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The present invention relates to field of optical device technology, particularly relate to a kind of phtographic lens, use that diaphragm is preposition and the structure of four aspherical plastic lens, by special aspherical Combination Design, having pixel cell less, modular volume is less, camera lens overall length is shorter, product yields is high, and imaging effect is good, lower-cost advantage.
Description
Technical field
The present invention relates to field of optical device technology, particularly relate to a kind of for mobile phone 8,000,000 pixel camera head mould group
Aspherical surface camera lens.
Background technology
After 2013 start, from smart mobile phone processor to display screen, again to camera, even related join to mobile phone is each
Part, all presents the competition situation of upgrading at a high speed.Owing to the flagship mobile phone configuration of each brand current is all similar, therefore find
Product differentiation just becomes a thing racked one's brains.And in some nearest mobile phone new products, we seem to find manufacturer
The little high pixel camera lens of modular volume is particularly paid attention to.
Annual mobile phone market is all experiencing huge change, and the new science and technology continuing to bring out also constantly improves consumer
Eye and taste, enrich constantly etc. " bright spot " of the diversification of mobile phone style, the decline of price and telecommunications service promotees jointly
Continuous prosperity and the development of mobile phone market are entered.As the manufacturer that comes into the market gets more and more, market competition be growing more intense and
Constantly making widely known of customer profile's consciousness, cell phone manufacturer, while developing technology meets functional requirement, also does one's utmost to seek mobile phone
New attraction.On mobile phone market, camera function of taking pictures has become as the main flow of mobile phone configuration and basic function, it is anticipated that
, being equipped with high-performance camera for mobile phone will become trend and attraction.With the universal and continuous upgrading of smart mobile phone, shooting
Mobile phone basic configuration is improving constantly, and imaging pixels is from 100,000 pixels the earliest, 300,000 pixels, the release of mega pixel, development
To 3,000,000 pixels, 5,000,000 pixels universal, through striding forward the even higher configuration of 8,000,000 pixels, user is for hand simultaneously
The take pictures quality requirements of image quality of machine is also just more and more higher, and good image quality of taking pictures just be unable to do without outstanding mobile phone camera configuration, can
Seeing, the phtographic lens having high-quality has become as development and the fashion trend of mobile phone.
How existing phtographic lens technology, meet lens assembly high-quality imaging effect same under high and low temperature environment
When, it is also equipped with good processing and manufacturing ability, and reduce the production cost of lens assembly further, with applicable production in enormous quantities etc.
All become the requirement that optical lens assembly design needs to meet.But, it is relatively big that existing phtographic lens there is also pixel cell, module
Volume is relatively big, and camera lens overall length is longer, and product yields is low, and imaging effect is poor, relatively costly shortcoming.
Content of the invention
Present invention aims to the deficiencies in the prior art and a kind of phtographic lens is provided, there is pixel cell relatively
Little, modular volume is less, and camera lens overall length is shorter, and product yields is high, and imaging effect is good, lower-cost advantage.
For reaching above-mentioned purpose, the present invention is achieved through the following technical solutions.
A kind of phtographic lens, it includes from object side to the diaphragm becoming image side to be arranged in order, lenses the first, lenses
2nd, lenses the 3rd, lenses four and glass filter, it uses diaphragm preposition, and diaphragm is positioned at the face sequence of lenses one
One side；Described lenses the first, lenses the 2nd, lenses three and lenses four are aspherical plastic lens, mirror
It is aspherical that the two sides of piece is even；The two sides of described lenses one is convex surface；Described lenses two is meniscus,
And convex surface facing thing side, concave surface is towards image space；Described lenses three is concave-convex lens, and concave surface is towards thing side, convex surface
Towards image space；Described lenses four is meniscus, and convex surface facing thing side, concave surface is towards image space, and lenses four
Two sides undulate；The aspherical formula of described lenses the first, lenses the 2nd, lenses three and lenses four
For:
Wherein, z represents the Z coordinate value of lens surface each point, and r represents the Y axial coordinate value of each point on lens surface, and c is
The inverse of the radius of curvature R of lens surface, k is circular cone coefficient, α1、α2、α3、α4、α5、α6、α7、α8For order aspherical coefficients；
Wherein, the lens center thickness TC of described lenses one is 0.568 ~ 0.588mm, the eyeglass of lenses two
Center thickness TC is 0.234 ~ 0.254mm, and the lens center thickness TC of lenses three is 0.611 ~ 0.631mm；Lenses
The lens center thickness TC of four is 0.399 ~ 0.419mm；This wide-angle lens optics overall length is in 3.73mm, and the angle of visual field reaches 76
Degree, axle outer visual field key light line angle is less than 31 °.
Preferably, the lens center thickness TC of described lenses one, and between lenses one and lenses two
Air gap thickness AC, its ratio TC/AC=10 ~ 14.
Preferably, the lens center thickness TC of described lenses three, and between lenses two and lenses three
Air gap thickness AC, its ratio TC/AC=0.8 ~ 1.2.
Preferably, effective focal length f1 of described lenses one, and effective focal length f of whole lens assembly, its ratio f1/
f=0.7~0.9。
Preferably, the radius of curvature R 1 of the radius of curvature R 2 of the face sequence two of described lenses one, and face sequence one, its ratio
|R2/R1|=1~5。
Preferably, the material of described lenses the first, lenses three and lenses four is ZEONEX series, lens mirror
Piece two selects the material that refractive index is higher and dispersion is lower compared to ZEONEX series.
The invention have the benefit that a kind of phtographic lens of the present invention, use diaphragm preposition and four aspherical
The structure of plastic lens, by special aspherical Combination Design, has pixel cell less, and modular volume is less, and camera lens is total
Long shorter, product yields is high, and imaging effect is good, lower-cost advantage.
Brief description
Below with accompanying drawing, the present invention is further detailed, but the embodiment in accompanying drawing is not constituted to this
Bright any restriction.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the MTF schematic diagram of the present invention.
Fig. 3 is the curvature of field of the present invention, distortion schematic diagram.
Fig. 4 is the disc of confusion schematic diagram of the present invention.
Fig. 5 is the relative illumination schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be described.
As shown in Figures 1 to 5, a kind of phtographic lens, it includes from object side to the diaphragm becoming image side 7 to be arranged in order the 6th, saturating
Mirror eyeglass 1, lenses 22, lenses 33, lenses 44 and glass filter 5, it uses diaphragm 6 preposition, light
Door screen 6 is positioned at face sequence 1 side of lenses 1；Described lenses 1, lenses 22, lenses 33 and thoroughly
Mirror eyeglass 44 is aspherical plastic lens, and it is aspherical that the two sides of eyeglass is even.Said lens system is being operated
When, the light incident from thing side sequentially passes through lenses 1, lenses 22, lenses 33, lenses 44 and
Form image at imaging plane after glass filter 5.
As shown in Figure 1 with shown in Fig. 2, in the present embodiment, the two sides of described lenses 1 is convex surface；Described
Mirror eyeglass 22 is meniscus, and convex surface facing thing side, concave surface is towards image space；Described lenses 33 is concave-convex lens,
And concave surface is towards thing side, convex surface facing image space；Described lenses 44 is meniscus, and convex surface facing thing side, concave surface
Towards image space, and the two sides of lenses 44 i.e. face sequence 7 40 and face sequence 8 41 undulate.The present invention uses four aspheric
The structure of face plastic lens, the feature of this non-spherical lens is, from lens centre to periphery curvature be continually varying, with from
Lens centre has the spherical lens of certain curvature different to periphery, and non-spherical lens has more preferably radius of curvature characteristic, has
Improve and distort aberration and the advantage improving astigmatic image error, enable to the visual field and become much larger and true, therefore, use aspherical
After mirror, the aberration occurring when imaging can be eliminated as much as possible, thus improve image quality.
In the present embodiment, the aspheric of described lenses 1, lenses 22, lenses 33 and lenses 44
Face formula is:
Wherein, z represents the Z coordinate value of lens surface each point, and r represents the Y axial coordinate value of each point on lens surface, and c is
The inverse of the radius of curvature R of lens surface, k is circular cone coefficient, α1、α2、α3、α4、α5、α6、α7、α8For order aspherical coefficients.
As preferred embodiment, the front table of described lenses 1, lenses 22, lenses 33 and lenses 44
The face shape parameter of face and rear surface is as follows respectively:
Sequence 1 face, lenses 1 face sequence 2 11
c 1/ 1.89013236862954 1/-2.82066060245822
k 4.958080615018 -54.99144064354
α1 0 0
α2 -0.2392652302323 -0.4084535542463
α3 0.3818353423229 0.2745290196626
α4 -3.878649995627 0.4031102167432
α5 12.92847138341 -1.093222700605
α6 -27.00274549421 -0.5908222317719
α7 30.01566278525 3.027429643076
α8 -15.76923362857 -2.381387939331
Sequence 3 20 face, lenses 22 face sequence 4 21
c 1/ 4.62085258199976 1/ 1.59910063708311
k 0 -3.532971822808
α1 0 0
α2 -0.1192597000349 0.04656861970775
α3 -0.1263025232362 0.05396542840633
α4 1.47882157148 -0.05359272423255
α5 -2.315774255066 0.2703628940849
α6 1.643068522862 0.5662063713431
α7 -0.445077603156 -1.385631603725
α8 -0.1233694373798 0.5930397099206
Sequence 5 30 face, lenses 33 face sequence 6 31
c 1/ -2.33746835941915 1/ -0.784342417100019
k -0.6304447105602 -5.558187105484
α1 0 0
α2 0.1866789565547 -0.4361438870441
α3 -0.5162096954987 0.7543722085547
α4 0.1609390907524 -0.9873011052872
α5 1.616840318301 0.4051927633054
α6 -3.321349720753 0.650133900419
α7 2.919547189307 -0.6910396055538
α8 -1.034259404766 0.180305381619
Sequence 7 40 face, lenses 44 face sequence 8 41
c 1/ 1.98564127111932 1/ 0.656591150272796
k -1.606733746014 -4.481133636325
α1 0 0
α2 -0.4565550903805 -0.2144643003852
α3 0.2455691948737 0.1374927411067
α4 -0.03681825299498 -0.06056708987348
α5 -0.001165464523215 0.01384788189095
α6 -0.003711436559791 -0.0004026248186707
α7 0.001902623762964 -0.0004206703126681
α8 -0.0002245178364794 0.00005456285501302
Wherein, it is preferred that the material of described lenses 1, lenses 33 and lenses 44 is ZEONEX system
Row, lenses 22 selects the material that refractive index is higher and dispersion is lower compared to ZEONEX series, can effectively reduce lens
Lens optical effective diameter, beneficially whole lens assembly contour structures realizes subminaturization.
In the present embodiment, the TV in order to preferably reduce system distorts and chief ray shooting angle, needs to described
Lenses 1, lenses 22, lenses 33 and lenses 44 specifically design, specific as follows:
First, preferred, wherein, the lens center thickness TC of described lenses 1 is 0.568 ~ 0.588mm, lens mirror
The lens center thickness TC of piece 22 is 0.234 ~ 0.254mm, the lens center thickness TC of lenses 33 is 0.611 ~
0.631mm；The lens center thickness TC of lenses 44 is 0.399 ~ 0.419mm, effectively can foreshorten to optics overall length
3.73mm it is interior.As optimum embodiment, the lens center thickness TC of described lenses 1 is 0.578mm, lens mirror
The lens center thickness TC of piece 22 is 0.244mm, and the lens center thickness TC of lenses 33 is 0.621mm；Lenses
The lens center thickness TC of 44 is 0.409mm.
2nd, preferred, the lens center thickness TC of described lenses 1, and lenses 1 and lenses 22
Between Air gap thickness AC, its ratio TC/AC=10 ~ 14, can beneficially control the TV distortion value of lens group at specification value model
In enclosing.
3rd, preferred, the lens center thickness TC of described lenses 33, and lenses 22 and lenses 33
Between Air gap thickness AC, its ratio TC/AC=0.8 ~ 1.2, contribute to regulate MTF curve S/T direction centrality, more
Be conducive to the overall picture element of management and control camera lens.
4th, preferred, effective focal length f1 of described lenses 1, and effective focal length f of whole lens assembly, its ratio
Value f1/f=0.7 ~ 0.9, effective focal length f of control lens assembly, it is ensured that the angle of visual field of lens assembly reaches 76 degree, the outer visual field of axle
Key light line angle is less than 31 °.
5th, preferred, the radius of curvature R 2 of the face sequence 2 11 of described lenses 1, and the radius of curvature of face sequence 1
R1, its ratio | R2/R1 |=1 ~ 5, the deviation of regulation eyeglass material refractive index actual value and theoretical value, and effectively reduce shaping work
The impact of skill.
From accompanying drawing 1 ~ 5 and embodiment, it can be seen that a kind of phtographic lens of the present invention has a characteristic that
1st, use diaphragm preposition, it is ensured that to improve central vision image quality while systematic eccentricity tilt sensitive is spent, reach
The image quality of 8000000 pixels；
2nd, optics overall length foreshortens in 3.73mm；The angle of visual field reaches 76 degree, and axle outer visual field key light line angle is less than 31 °, caters to
Mobile lens latest development trend, meets current mobile phone market 1/4 " needs of 8,000,000 pixel camera lenses；
3rd, FNO2.2 large aperture, increases light-inletting quantity, improves the shooting ability under low light environment；
4th, use four aspherical plastic lens, can effectively eliminate all kinds of aberration, obtain good imaging effect, make simultaneously
Replacing glass with resins for universal use material on the market, forming technique is stablized and technical maturity, solves the processing difficulties of glass lens
And the problem that the product yield that causes is low and relatively costly, there is pixel cell less, modular volume is less, and camera lens overall length is relatively
Short, product yields is high, and imaging effect is good, lower-cost advantage.
Above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention's
Thought, all will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Restriction.
Claims (1)
1. a phtographic lens, it is characterised in that: it includes from object side to the diaphragm (6) becoming image side (7) to be arranged in order, lens
Eyeglass one (1), lenses two (2), lenses three (3), lenses four (4) and glass filter (5), it uses diaphragm
(6) preposition, diaphragm (6) is positioned at face sequence one (10) side of lenses one (1)；Described lenses one (1), lenses two
(2), lenses three (3) and lenses four (4) are aspherical plastic lens, and it is aspherical that the two sides of eyeglass is even；
The two sides of described lenses one (1) is convex surface；Described lenses two (2) is meniscus, and convex surface facing thing side,
Concave surface is towards image space；Described lenses three (3) is concave-convex lens, and concave surface is towards thing side, convex surface facing image space；Described
Mirror eyeglass four (4) is meniscus, and convex surface facing thing side, concave surface towards image space, and the two sides of lenses four (4) in
Waveform；The aspherical public affairs of described lenses one (1), lenses two (2), lenses three (3) and lenses four (4)
Formula is:
Wherein, z represents the Z coordinate value of lens surface each point, and r represents the Y axial coordinate value of each point on lens surface, and c is lens
The inverse of the radius of curvature R on surface, k is circular cone coefficient, α1、α2、α3、α4、α5、α6、α7、α8For order aspherical coefficients；
Wherein, the lens center thickness TC of described lenses one (1) is 0.568 ~ 0.588mm, the mirror of lenses two (2)
Piece center thickness TC is 0.234 ~ 0.254mm, and the lens center thickness TC of lenses three (3) is 0.611 ~ 0.631mm；Lens
The lens center thickness TC of eyeglass four (4) is 0.399 ~ 0.419mm；This phtographic lens optics overall length in 3.73mm, the angle of visual field
Reaching 76 degree, axle outer visual field key light line angle is less than 31 °；
The lens center thickness TC of described lenses one (1), and the sky between lenses one (1) and lenses two (2)
Gas gap thickness AC, its ratio TC/AC=10 ~ 14；
The lens center thickness TC of described lenses three (3), and the sky between lenses two (2) and lenses three (3)
Gas gap thickness AC, its ratio TC/AC=0.8 ~ 1.2；
Effective focal length f1 of described lenses one (1), and effective focal length f of whole lens assembly, its ratio f1/f=0.7 ~
0.9；
The radius of curvature R 2 of the face sequence two (11) of described lenses one (1), and the radius of curvature R 1 of face sequence one (10), its ratio
|R2/R1|=1~5；The material of described lenses one (1), lenses three (3) and lenses four (4) is ZEONEX series,
Lenses two (2) selects the material that refractive index is higher and dispersion is lower compared to ZEONEX series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076135.6A CN104020550B (en) | 2014-03-04 | 2014-03-04 | A kind of phtographic lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076135.6A CN104020550B (en) | 2014-03-04 | 2014-03-04 | A kind of phtographic lens |
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| Publication Number | Publication Date |
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| CN104020550A CN104020550A (en) | 2014-09-03 |
| CN104020550B true CN104020550B (en) | 2016-10-05 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105259642B (en) * | 2015-11-23 | 2019-02-19 | 广东旭业光电科技股份有限公司 | Photographic lens and image acquisition equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540424A (en) * | 2010-12-14 | 2012-07-04 | 索尼公司 | Imaging lens and imaging apparatus |
| CN103513398A (en) * | 2012-06-26 | 2014-01-15 | 比亚迪股份有限公司 | Optical imaging lens |
| CN203965709U (en) * | 2014-03-04 | 2014-11-26 | 东莞市旭业光电科技有限公司 | A kind of phtographic lens |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5663367B2 (en) * | 2011-03-30 | 2015-02-04 | オリンパス株式会社 | Imaging optical system and imaging apparatus using the same |
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2014
- 2014-03-04 CN CN201410076135.6A patent/CN104020550B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540424A (en) * | 2010-12-14 | 2012-07-04 | 索尼公司 | Imaging lens and imaging apparatus |
| CN103513398A (en) * | 2012-06-26 | 2014-01-15 | 比亚迪股份有限公司 | Optical imaging lens |
| CN203965709U (en) * | 2014-03-04 | 2014-11-26 | 东莞市旭业光电科技有限公司 | A kind of phtographic lens |
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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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