CN101334513B - Optical lens component - Google Patents
Optical lens component Download PDFInfo
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- CN101334513B CN101334513B CN2007100761178A CN200710076117A CN101334513B CN 101334513 B CN101334513 B CN 101334513B CN 2007100761178 A CN2007100761178 A CN 2007100761178A CN 200710076117 A CN200710076117 A CN 200710076117A CN 101334513 B CN101334513 B CN 101334513B
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- Prior art keywords
- lens
- optical
- object space
- picture side
- optical lens
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- 230000003287 optical effect Effects 0.000 title claims abstract description 64
- 239000006185 dispersion Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 238000003384 imaging method Methods 0.000 abstract description 7
- 230000004075 alteration Effects 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 241000700608 Sagitta Species 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- WKBPZYKAUNRMKP-UHFFFAOYSA-N 1-[2-(2,4-dichlorophenyl)pentyl]1,2,4-triazole Chemical compound C=1C=C(Cl)C=C(Cl)C=1C(CCC)CN1C=NC=N1 WKBPZYKAUNRMKP-UHFFFAOYSA-N 0.000 description 1
- 206010010071 Coma Diseases 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- -1 cyclic olefin Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Abstract
The invention discloses an optical lens component, comprising a diaphragm and a lens group; the lens group comprises a first lens, a second lens and a third lens which have the same axis and are sequentially arranged from the object to the image; the diaphragm is arranged in front of the first lens and close to the object; the first lens comprises a first surface close to the object and a second surface close to the image; the second lens comprises a third surface close to the object and a fourth surface close to the image; the third lens comprises a fifth surface close to the object and a sixth surface close to the image; the first surface, the second surface, the third surface, the fourth surface, the fifth surface and the sixth surface are non-spherical surfaces; the coordinate values of all points on the non-spherical surfaces meet the non-spherical formula. By adopting the non-spherical lens with specific parameters, the optical lens component of the invention has relatively short optical total length. The optical lens component of the invention can lead the image to achieve more than 3.80mm so as to adapt to imaging chips with high pixel such as 1.30 million pixels.
Description
Technical field
The present invention relates to a kind of optical device, relate in particular to a kind of optical lens assembly.
Background technology
Along with the progress of science and technology, the camera function of mobile phone also tends to become strong greatly more, and the view data processing speed of mobile phone is constantly accelerated, and picture editing function is enriched constantly, and the image quality of mobile phone cam also steadily improves.The pixel of mobile phone cam progressively carries out the transition to present 1,300,000 from initial 300,000.But when realizing high pixel, keep mobile phone compact, the design of optical lens assembly has been brought bigger challenge.
Summary of the invention
The present invention is exactly in order to overcome above deficiency, to have proposed the relatively optical lens assembly of weak point, the adaptive higher pixel imager chip of energy of a kind of optics length overall.
Technical matters of the present invention is solved by following technical scheme:
A kind of optical lens assembly, comprise diaphragm and lens combination, described lens combination comprise coaxial and from object space to picture side arrange in turn first, two, three lens, it is preceding near object space that described diaphragm is positioned at first lens, described first lens comprise the second surface near the first surface of object space and close picture side, described second lens comprise near the 3rd surface of object space and the 4th surface of close picture side, described the 3rd lens comprise near the 5th surface of object space and the 6th surface of close picture side, described first, two, three, four, five, six surfaces are aspheric surface, and the coordinate figure of each point satisfies following formula on the described non-spherical surface:
Wherein: Z is for being starting point with each aspheric surface and optical axes crosspoint, and along the aspheric surface variable of optical axis direction, k is the quadric surface coefficient, and c is the minute surface curvature of centre, and r is perpendicular to the variable on the axle of optical axis; A1, a2, a3, a4, a5, a6 are asphericity coefficient;
The face shape parameter of described first, second and third lens is as follows:
| First surface | Second surface | |
| c | 0.554139114 | -0.411983275 |
| k | -0.3958808 | 4.398962 |
| a1 | 0.11211513 | 0.10441555 |
| a2 | -0.076080779 | -0.25600488 |
| a3 | 1.2628155 | -0.83750164 |
| First surface | Second surface | |
| a4 | -10.789536 | 4.186331 |
| a5 | 34.008107 | -13.990318 |
| a6 | -36.668686 | 18.668248 |
| The 3rd surface | The 4th surface | |
| c | -0.501278511 | -0.414795765 |
| k | 4.936042 | 3.326354 |
| a1 | -0.39690718 | -0.15760891 |
| a2 | -0.29262379 | -0.28614416 |
| a3 | -0.034445906 | 1.1403429 |
| a4 | 7.2206962 | 0.063021608 |
| a5 | -19.491563 | -0.44526251 |
| a6 | 19.640032 | -0.070888911 |
| The 5th surface | The 6th surface | |
| c | 1.018946806 | 0.950558596 |
| k | -5.842341 | -6.923165 |
| a1 | -0.048769873 | 0.031918381 |
| a2 | -0.10543709 | -0.086795308 |
| a3 | 0.057655418 | 0.014446052 |
| The 5th surface | The 6th surface | |
| a4 | -0.0063634111 | -9.0651696e-005 |
| a5 | -0.0031140928 | -0.00051296894 |
| a6 | 0.00072837649 | -2.3721355e-005 |
Technical matters of the present invention is further solved by following technical scheme:
Also comprise the optical filter that is positioned at behind the 3rd lens near picture side.
The material of described first, second and third lens is an optical plastic, and the refractive index of described first and third lens is less than the refractive index of described second lens, and the dispersion values of described first and third lens is greater than the dispersion values of described second lens.
The beneficial effect that the present invention is compared with the prior art is:
The present invention is by adopting the non-spherical lens of special parameter, makes the optics length overall of the optical lens assembly of the present invention 3.44mm that only has an appointment, and the optics length overall is shorter relatively.Optical lens assembly of the present invention can make image height reach more than the 3.80mm, and at present the diagonal angle line length of the imager chip of 1,300,000 pixels of main flow is generally 3.60mm, the imager chip that optical lens assembly of the present invention fully can the contour pixel of adaptive 1,300,000 pixels.Optical lens assembly of the present invention is by suitably choosing the face shape parameter of first, second and third lens, can effectively eliminate the primary aberration of imaging light, comprise spherical aberration, coma, astigmatism, the curvature of field and distortion, and primary aberration surplus and senior aberration be balance well, can effectively utilize the lens of lesser amt to reach higher image quality.
The material that lens adopted of optical lens assembly of the present invention is an optical plastic, with respect to glass lens can alleviate camera lens weight, reduce cost.And adopt optical plastic can avoid the processing difficulties of glass lens as the raw material of lens, and satisfied mass-produced requirement, improved production efficiency, further reduced manufacturing cost.The refractive index of optical lens assembly first and third lens of the present invention is less than the refractive index of second lens, and the dispersion values of first and third lens is greater than the dispersion values of first lens, such color difference eliminating well and shorten the optics length overall of optical lens assembly of drawing materials.
Description of drawings
Fig. 1 is the structural representation of optical lens assembly of the present invention;
Fig. 2 is the MTF figure of optical lens assembly of the present invention.
Fig. 3 is the curvature of field figure of optical lens assembly of the present invention.
Fig. 4 is the distortion figure of optical lens assembly of the present invention.
Fig. 5 is the chromaticity difference diagram of optical lens assembly of the present invention.
Fig. 6 is the relative exposure figure of optical lens assembly of the present invention.
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further details below by concrete embodiment.
As shown in Figure 1, optical lens assembly of the present invention comprises fixed aperture 1, one group of lens and glass filter 5, these group lens comprise plastics first lens 2, second lens 3 and the 3rd lens 4 coaxial and that arrange in turn to picture side from object space, this optical lens assembly is imaged on imaging surface 6, it is preceding near object space that this fixed aperture 1 is positioned at first lens 2, and this optical filter 5 is between imaging surface 6 and the 3rd lens 4.
Described first surface 21, second surface 22, the 3rd surface 31, the 4th surface 32, the 41 and the 6th surface 42, the 5th surface are the even aspheric surface, and the coordinate figure of each point all satisfies as following shape formula on this non-spherical surface:
Wherein, z is for being starting point with each aspheric surface and optical axis o intersection point, and along the aspheric surface variable of optical axis direction, i.e. minute surface depth value is because of selected lens shape is the axisymmetric eyeglass, so this aspheric surface formula is all got the even item.K is the quadric surface coefficient, i.e. the tapering of eyeglass; C is the minute surface curvature of centre, c=1/R, and wherein R is a minute surface curvature of centre radius; R is perpendicular to the variable on the axle of optical axis; A1, a2, a3, a4, a5, a6 ... be asphericity coefficient.
The face shape parameter value of above-mentioned first, second and third lens is respectively referring to table 1, table 2 and table 3.
The face shape parameter of table 1 first lens
| First surface | Second surface | |
| c | 0.554139114 | -0.411983275 |
| k | -0.3958808 | 4.398962 |
| a1 | 0.11211513 | 0.10441555 |
| a2 | -0.076080779 | -0.25600488 |
| a3 | 1.2628155 | -0.83750164 |
| a4 | -10.789536 | 4.186331 |
| a5 | 34.008107 | -13.990318 |
| a6 | -36.668686 | 18.668248 |
The face shape parameter of table 2 second lens
| The 3rd surface | The 4th surface | |
| c | -0.501278511 | -0.414795765 |
| The 3rd surface | The 4th surface | |
| k | 4.936042 | 3.326354 |
| a1 | -0.39690718 | -0.15760891 |
| a2 | -0.29262379 | -0.28614416 |
| a3 | -0.034445906 | 1.1403429 |
| a4 | 7.2206962 | 0.063021608 |
| a5 | -19.491563 | -0.44526251 |
| a6 | 19.640032 | -0.070888911 |
The face shape parameter of table 3 the 3rd lens
| The 5th surface | The 6th surface | |
| c | 1.018946806 | 0.950558596 |
| k | -5.842341 | -6.923165 |
| a1 | -0.048769873 | 0.031918381 |
| a2 | -0.10543709 | -0.086795308 |
| a3 | 0.057655418 | 0.014446052 |
| a4 | -0.0063634111 | -9.0651696e-005 |
| a5 | -0.0031140928 | -0.00051296894 |
| a6 | 0.00072837649 | -2.3721355e-005 |
The material of described first lens 2 and the 3rd lens 4 is the optical plastic with high dispersion values, low-refraction, and the material of these second lens 3 is the optical plastic of low dispersion values, high index of refraction.Drawing materials and arrange color difference eliminating well and shorten the optics length overall of camera lens like this.First lens 2 and the 3rd lens 4 preferred use cyclic olefin copolymerized macromolecule materials (Thermoplastic Olefin Polymerof Amorphous Structure, TOPAS), refractive index n 1=1.53, chromatic dispersion v1=54.Second lens, 3 preferred polycarbonate (POLYCARB) material, refractive index n 2=1.585, the chromatic dispersion v2=29.5 of using.
Above-mentioned optical filter 5 is a sheet glass, the described optical filter 5 preferred borosilicate glass material of being made by the fusion virgin material, refractive index n 4=1.5168, the chromatic dispersion v4=64.2 of using.Preferably, optical filter 5 at least one coating surface one deck IR-cut filter membranes (IR-cut Coating) come from Infrared in the object reflection ray with filtering, thereby improve image quality.
The effective focal length of optical lens assembly of the present invention is 2.728mm, back focal length is 0.6902mm, the optics length overall is 3.44mm, image height also reaches more than the 3.80mm, relative aperture is F/#=2.8, meets the requirement of the mobile phone imager chip of the 130 above pixels that the optics length overall is relatively short, energy is adaptive 1/5 inch.
For optical lens assembly of the present invention, its optical property figure sees Fig. 2,3,4,5,6.
Fig. 2 is modulation transfer function (Modulation Transfer Function the is called for short MTF) curve map of optical lens assembly, transverse axis representation space frequency among the figure, and unit: line is to every millimeter (lp/mm); The longitudinal axis is represented the numerical value of modulation transfer function (MTF), and the numerical value of described MTF is used for estimating the image quality of camera lens, and span is 0-1, and the image quality of the high more straight more expression camera lens of MTF curve is good more, and is strong more to the reducing power of true picture.As can be seen from Figure 2 the MTF curve of each visual field meridian direction (T) and sagitta of arc direction (S) direction very close to.This image quality of camera lens that is just embodying this embodiment is outstanding, it shows: camera lens is in each visual field, the imaging performance of meridian direction (T) and this both direction of sagitta of arc direction (S) has good consistance, can guarantee that camera lens can both blur-free imaging on whole imaging surface.And clear in the middle of can not occurring, ill-defined situation.
Fig. 3 is the curvature of field figure of optical lens assembly of the present invention, and the curvature of field of camera lens is less than 0.10mm as can be seen from Figure 3.Fig. 4 is the distortion synoptic diagram of optical lens assembly of the present invention, and the optical distortion of optical lens assembly of the present invention is less than 0.5% as can be seen from Figure 4.Fig. 5 is the chromaticity difference diagram of optical lens assembly of the present invention, and optical lens assembly lateral chromatic aberration of the present invention as can be seen from Figure 5 is less than 5 μ m, within the Airy disk range of size.
Fig. 6 is the relative exposure figure of optical lens assembly of the present invention.As can be seen from Figure 6, the relative exposure of optical lens assembly of the present invention shows that greater than 52% the illumination of this visual field, camera lens edge and visual field, center is even, bright and clear.Simultaneously, the maximum field of view angle of whole optical system is 67 °, the edge chief ray angle can cooperate the requirement of complementary metal oxide semiconductor (CMOS) (CMOS)/Charge Coupled Device (CCD) (Charge Coupled Device is called for short CCD) image sensor reception of main flow on the market less than 27 °.
Optical lens assembly structure of the present invention is not only applicable to the mobile phone cam module, can be applicable in other portable type camera shot equipments simultaneously, as computer camera, small-sized watch-dog etc. yet.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. optical lens assembly, comprise diaphragm and lens combination, described lens combination comprise coaxial and from object space to picture side arrange in turn first, two, three lens, it is preceding near object space that described diaphragm is positioned at first lens, described first lens comprise the second surface near the first surface of object space and close picture side, described second lens comprise near the 3rd surface of object space and the 4th surface of close picture side, described the 3rd lens comprise near the 5th surface of object space and the 6th surface of close picture side, described first, two, three, four, five, six surfaces are aspheric surface, and the coordinate figure of each point satisfies following formula on the described non-spherical surface:
Wherein: Z is for being starting point with each aspheric surface and optical axes crosspoint, and along the aspheric surface variable of optical axis direction, k is the quadric surface coefficient, and c is the minute surface curvature of centre, and r is perpendicular to the variable on the axle of optical axis; A1, a2, a3, a4, a5, a6 are asphericity coefficient;
It is characterized in that: the face shape parameter of described first, second and third lens is as follows:
2. optical lens assembly according to claim 1 is characterized in that: also comprise the optical filter that is positioned at behind the 3rd lens near picture side.
3. optical lens assembly according to claim 1 and 2, it is characterized in that: the material of described first, second and third lens is an optical plastic, the refractive index of described first and third lens is less than the refractive index of described second lens, and the dispersion values of described first and third lens is greater than the dispersion values of described second lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100761178A CN101334513B (en) | 2007-06-25 | 2007-06-25 | Optical lens component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100761178A CN101334513B (en) | 2007-06-25 | 2007-06-25 | Optical lens component |
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| Publication Number | Publication Date |
|---|---|
| CN101334513A CN101334513A (en) | 2008-12-31 |
| CN101334513B true CN101334513B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100761178A Expired - Fee Related CN101334513B (en) | 2007-06-25 | 2007-06-25 | Optical lens component |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846781B (en) * | 2009-03-27 | 2012-03-07 | 比亚迪股份有限公司 | Optical lens component |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447144A (en) * | 2002-03-25 | 2003-10-08 | 柯尼卡株式会社 | Image trapping lens, image trapper, and image trapping unit |
| CN1576939A (en) * | 2003-07-11 | 2005-02-09 | 柯尼卡美能达精密光学株式会社 | Image pick-up lens, image pick-up unit, and mobile terminal provided with this image pick-up unit |
| CN1673795A (en) * | 2004-03-27 | 2005-09-28 | 鸿富锦精密工业（深圳）有限公司 | Digital camera lens |
| CN1769940A (en) * | 2004-11-01 | 2006-05-10 | 柯尼卡美能达精密光学株式会社 | Picture-taking lens, image pick-up unit and hand-held device |
-
2007
- 2007-06-25 CN CN2007100761178A patent/CN101334513B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447144A (en) * | 2002-03-25 | 2003-10-08 | 柯尼卡株式会社 | Image trapping lens, image trapper, and image trapping unit |
| CN1576939A (en) * | 2003-07-11 | 2005-02-09 | 柯尼卡美能达精密光学株式会社 | Image pick-up lens, image pick-up unit, and mobile terminal provided with this image pick-up unit |
| CN1673795A (en) * | 2004-03-27 | 2005-09-28 | 鸿富锦精密工业（深圳）有限公司 | Digital camera lens |
| CN1769940A (en) * | 2004-11-01 | 2006-05-10 | 柯尼卡美能达精密光学株式会社 | Picture-taking lens, image pick-up unit and hand-held device |
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| CN101334513A (en) | 2008-12-31 |
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