CN101937124A - Optical lens component - Google Patents
Optical lens component Download PDFInfo
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- CN101937124A CN101937124A CN 200910108463 CN200910108463A CN101937124A CN 101937124 A CN101937124 A CN 101937124A CN 200910108463 CN200910108463 CN 200910108463 CN 200910108463 A CN200910108463 A CN 200910108463A CN 101937124 A CN101937124 A CN 101937124A
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Abstract
The invention relates to an optical device, and provides an optical lens component. The optical lens component comprises a lens assembly, wherein the lens assembly comprises a first plus power lens and a second plus power lens which are coaxial and are arranged from an object space to an image space in turn; the lens assembly meets the following conditions that: L/f is more than 1.0 and less than 1.3; f1 is more than 0; the absolute value of f/f1 is more than 0.5 and less than 0.95; f2 is more than 0; and the absolute value of f/f2 is more than 0.1 and less than 0.65, wherein f is the effective focal length of the entire optical lens component; L is the total length of an optical system; f1 is the effective focal length of the first lens; f2 is the effective focal length of the second lens; f is the effective focal length of the entire lens assembly; L is the total length of the optical system; f1 is the effective focal length of the first lens; and f2 is the effective focal length of the second lens. Two lenses are adopted by the optical lens component of the invention, the total length of the lens is shortened, object difference is corrected so as to obtain high optical performance, and the cost reduction is facilitated.
Description
Technical field
The present invention relates to optical device, be specifically related to a kind of optical lens assembly.
Background technology
In digital image-forming equipment, the optical imagery camera lens is particularly important assembly, and the picture element of camera lens has directly determined the imaging performance of digital image-forming equipment.Digital product is brought in constant renewal in and is regenerated simultaneously, develops to compact direction day by day, thereby also forces lens design constantly to pursue shorter optics length overall.In the good imaging effect that guarantees camera lens, reduce production costs as much as possible, possess good processability, adapting to industrial large quantities of volume production also all becomes required satisfied important requirement in the lens optical design.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiencies in the prior art, provides a kind of and can effectively proofread and correct various aberrations, total length, and volume is little, optical lens assembly with low cost.
A kind of optical lens assembly comprises lens combination, and described optical lens group comprises positive diopter first lens and positive diopter second lens coaxial and that be arranged in order from object space to picture side; Described first lens comprise towards the first surface of object space with towards the second surface of picture side, and described second lens comprise towards the 3rd surface of object space with towards the 4th surface of picture side.And described lens combination meets the following conditions:
1.0＜L/f＜1.3；
F1＞0, and 0.5＜| f/f1|＜0.95;
F2＞0, and 0.1＜| f/f2|＜0.65;
Wherein f is the effective focal length value of whole optical lens assembly; L is the optical system length overall; F1 is the effective focal length value of first lens; F2 is the effective focal length value of second lens; Wherein f is the effective focal length value of whole lens combination; L is the optical system length overall; F1 is the effective focal length value of first lens; F2 is the effective focal length value of second lens.
The invention has the beneficial effects as follows: the lens combination that technical solution of the present invention is just adopting, two lens that satisfy above-mentioned condition of positive diopter combination are formed, realized each aberration, carry out good rectification, shortened the length overall of camera lens simultaneously, and lens assembly of the present invention is easy to processing, helps cost and reduces.
Description of drawings
The optical assembly structure synoptic diagram of Fig. 1 optical lens assembly embodiment one of the present invention;
Optical lens MTF (optical transfer function) figure of Fig. 2 embodiment two;
The optical lens curvature of field synoptic diagram of Fig. 3 embodiment two;
The optical lens distortion synoptic diagram of Fig. 4 embodiment two;
The optical lens MTF figure of Fig. 5 embodiment three;
The optical lens curvature of field synoptic diagram of Fig. 6 embodiment three;
The optical lens distortion synoptic diagram of Fig. 7 embodiment three.
The specific embodiment mode
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment one:
As shown in Figure 1, a kind of optical lens assembly that the embodiment of the invention one provides comprises lens combination, and described lens combination comprises positive diopter first lens 2 and positive diopter second lens 3 coaxial and that be arranged in order from object space to picture side; Described first lens comprise towards the first surface of object space with towards the second surface of picture side, and described second lens comprise towards the 3rd surface of object space with towards the 4th surface of picture side.And described lens combination meets the following conditions:
1.0＜L/f＜1.3；
F1＞0, and 0.5＜| f/f1|＜0.95;
F2＞0, and 0.1＜| f/f2|＜0.65;
Wherein f is the effective focal length value of whole optical lens assembly; L is the optical system length overall; F1 is the effective focal length value of first lens; F2 is the effective focal length value of second lens; Wherein f is the effective focal length value of whole lens combination; L is the optical system length overall; F1 is the effective focal length value of first lens; F2 is the effective focal length value of second lens.
Described optical lens assembly is only just adopting, two plastic lenss of positive diopter combination, and satisfies above-mentioned condition, has shortened the length overall of camera lens, and has been easy to processing, helps cost and reduces.And the relation between lens assembly length overall and each the lens effective focal length value is limited, further shortened the length overall of camera lens.Described optical lens assembly is well corrected each aberration simultaneously, has obtained optical property preferably.
The material of described first lens 2 and second lens 3 can be that optical glass also can be optical plastic, preferred described first lens of present embodiment and second lens material are optical plastic, to satisfy the requirement of current consumer to the low cost of product, ultra-thin, ultralight.
Further, the optical lens assembly of the embodiment of the invention also comprises fixed aperture 1, be used to control the luminous flux of scioptics group, described fixed aperture 1 can be arranged at the front of first lens 2, promptly be arranged in the object space zone of front of the first surface of first lens 2, also can be arranged on the front surface of first lens 2, preferably, in the present embodiment, fixed aperture 1 is arranged at the front of first lens 2.Fixed aperture 1 is arranged at before first lens 2, can increase the application scenario of optical lens assembly.
Further, described lens combination back promptly also comes from Infrared in the object reflection ray according to the sheet glass 4 that is provided with a light transmitting surface plating infrared cut-off light filtering films (IR-cut Coating) with filtering in the zone, picture side of second lens, 3 back, improves this lens assembly image quality in the application of digital domain.Preferred described sheet glass material is BK7, and refractive index and chromatic dispersion are respectively n=1.5168, v=64.17.
Described first surface, second surface, the 3rd surface and the 4th surface are aspheric surface, and described aspheric pictograph closes following formula:
Wherein: z is for being starting point with each aspheric surface and optical axes crosspoint, the axial axial value of vertical light, and k is the quadric surface coefficient, c is the minute surface curvature of centre, c=1/R, wherein R is a minute surface curvature of centre radius, r is the minute surface centre-height; a
1, a
2, a
3, a
4, a
5, a
6Be asphericity coefficient.
By above-mentioned aspheric surface formula as can be known, have or not array parameter just can obtain numerous aspheric surface.As long as four aspheric surfaces of four groups of parameter correspondences are formed two lens mutually, satisfy the required condition of said lens group, be lens provided by the present invention.Again by two embodiment, provide two parts of parameters, below so that the technician can more clearly know advantage of the present invention.
Embodiment two:
Second embodiment provided by the present invention, on the basis of embodiment one, the correlation parameter that has further proposed optical lens assembly is as follows:
Lens parameters:
Asphericity coefficient:
In the table thickness d for this reason identity distance from next distance, the length overall L=2.05mm of this camera lens, effective focal length value f=1.63mm, the effective focal length value f1=1.95mm of first lens, the effective focal length value f2=4.09mm of second lens, f-number FNO.=2.8.
In the present embodiment, preferably, the material of first lens is refractive index＜1.55, the optical material of dispersion values＞50, and wherein preferred plastic material PC (polycarbonate), refractive index and chromatic dispersion are respectively n1=1.525, v1=56; The material of second lens is refractive index＞1.55, the optical material of dispersion values＜50, and wherein preferred plastic material, refractive index and chromatic dispersion are respectively n2=1.525, v2=56.
Fig. 2 is modulation transfer function (ModulationTransfer Function the is called for short MTF) curve map of the optical lens assembly of the embodiment of the invention two, 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, it shows: this lens assembly 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 lens assembly can both blur-free imaging on whole imaging surface, and clear, ill-defined situation in the middle of can not occurring.
Fig. 3 and Fig. 4 are respectively the curvature of field and the distortion figure of the optical lens assembly of the embodiment of the invention two, and from Fig. 3 and Fig. 4 as can be seen, the curvature of field of this optical lens assembly is less than 0.10mm, and distortion is less than 2%; Can cooperate the requirement of complementary metal oxide semiconductor (CMOS) (CMOS)/Charge Coupled Device (CCD) (Charge CoupledDevice is called for short CCD) image sensor reception of main flow on the market.
Therefore embodiment provided by the invention can guarantee suitable back focal length on the basis of shortening the camera lens length overall, can also each aberration be that non-point image difference and aberrance are well corrected especially, and obtain desirable optical property.
Embodiment three:
The 3rd embodiment provided by the present invention, on the basis of embodiment one, the correlation parameter that has further proposed optical lens assembly is as follows:
Lens parameters:
| Type | Radius-of-curvature (R) | Quadric surface coefficient (k) | Thickness (dmm) |
| First surface | 0.2840949 | ?-0.7400231 | ?0.47 |
| Second surface | 4.665631 | ?-16.42607 | ?0.27 |
| The 3rd surface | 2.405119 | ?0 | ?0.56 |
| The 4th surface | -6.923161 | ?0 | ?0.04 |
| The optical filter front surface | ?0.3 | ||
| The optical filter rear surface | ?0.43 | ||
| Image planes | ?0 | ||
| Type | Radius-of-curvature (R) | Quadric surface coefficient (k) | Thickness (dmm) |
| First surface | ?0.2840949 | ?-0.7400231 | ?0.47 |
Asphericity coefficient:
In the table thickness d for this reason identity distance from next distance, the length overall L=2.07mm of this camera lens, effective focal length value f=1.60mm, the effective focal length value f1=2.297mm of first lens, the effective focal length value f2=2.72mm of second lens.
In the present embodiment, preferably, the material of first lens is refractive index＞1.57, the optical material of dispersion values＜32, and wherein preferred plastic material polycarbonate, refractive index and chromatic dispersion are respectively n1=1.585, v1=29.5; The material of second lens is refractive index＜1.55, the optical material of dispersion values＞50, and the wherein preferred armorphous polyolefin of plastic material, refractive index and chromatic dispersion are respectively n2=1.525, v2=56.
Fig. 5 is modulation transfer function (ModulationTransfer Function the is called for short MTF) curve map of the optical lens assembly of the embodiment of the invention three, 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, it shows: this lens assembly 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 lens assembly can both blur-free imaging on whole imaging surface, and clear, ill-defined situation in the middle of can not occurring.
Fig. 6 and Fig. 7 are respectively the curvature of field and the distortion figure of the optical lens assembly of the embodiment of the invention three, and as can be seen from Figures 6 and 7, the curvature of field of this optical lens assembly is less than 0.10mm, and distortion is less than 1%; Can cooperate the requirement of complementary metal oxide semiconductor (CMOS) (CMOS)/Charge Coupled Device (CCD) (Charge CoupledDevice is called for short CCD) image sensor reception of main flow on the market.
Therefore embodiment provided by the invention can guarantee suitable back focal length on the basis of shortening the camera lens length overall, can also each aberration be that non-point image difference and aberrance are well corrected especially, and obtain desirable optical property.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. an optical lens assembly comprises lens combination, it is characterized in that: described lens combination comprises positive diopter first lens and positive diopter second lens coaxial and that be arranged in order from object space to picture side; Described first lens comprise towards the first surface of object space with towards the second surface of picture side, and described second lens comprise towards the 3rd surface of object space with towards the 4th surface of picture side.And described lens combination meets the following conditions:
1.0＜L/f＜1.3；
F1＞0, and 0.5＜| f/f1|＜0.95;
F2＞0, and 0.1＜| f/f2|＜0.65;
Wherein f is the effective focal length value of whole optical lens assembly; L is the optical system length overall; F1 is the effective focal length value of first lens; F2 is the effective focal length value of second lens; Wherein f is the effective focal length value of whole lens combination; L is the optical system length overall; F1 is the effective focal length value of first lens; F2 is the effective focal length value of second lens.
2. according to the described optical lens assembly of claim 1, it is characterized in that: also comprise fixed aperture, described fixed aperture is positioned at the first lens front.
3. according to the described optical lens assembly of claim 1, it is characterized in that: the material of described lens combination is optical plastic.
4. according to the described optical lens assembly of claim 3, it is characterized in that: the material of first lens and second lens be refractive index less than 1.55, dispersion values is greater than 50 optical plastic.
5. according to the described optical lens assembly of claim 4, it is characterized in that: the material of first lens and second lens is and is armorphous polyolefin, it is 56 that the refractive index that the refractive index of first lens and second lens is 1.525, the first lens and second lens is dispersion values;
6. according to the described optical lens assembly of claim 3, it is characterized in that: the refractive index of the material of first lens is greater than 1.57, and dispersion values is less than 32; The refractive index of the material of second lens is less than 1.55, and dispersion values is greater than 50.
7. according to the described optical lens assembly of claim 6, it is characterized in that: the material of described first lens is a polycarbonate, and refractive index and chromatic dispersion are respectively n1=1.585, v1=29.5; The material of described second lens is armorphous polyolefin, and refractive index and chromatic dispersion are respectively n2=1.525, v2=56.
8. according to the described optical lens assembly of claim 1, it is characterized in that: also comprise optical filter, described optical filter is the sheet glass that at least one light transmitting surface is coated with infrared cut-off light filtering films, and described optical filter is positioned at the back of second lens.
9. according to each described optical lens assembly of claim 1 to 7, it is characterized in that: the face pictograph on described first surface, second surface, the 3rd surface and the 4th surface closes following formula:
Wherein: z is for being starting point with each aspheric surface and optical axes crosspoint, the axial axial value of vertical light, and k is the quadric surface coefficient, c is the minute surface curvature of centre, c=1/R, wherein R is a minute surface curvature of centre radius, r is the minute surface centre-height; A1, a2, a3, a4, a5, a6 are asphericity coefficient.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910108463 CN101937124B (en) | 2009-06-30 | 2009-06-30 | Optical lens component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910108463 CN101937124B (en) | 2009-06-30 | 2009-06-30 | Optical lens component |
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| CN101937124A true CN101937124A (en) | 2011-01-05 |
| CN101937124B CN101937124B (en) | 2013-01-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016019539A1 (en) * | 2014-08-07 | 2016-02-11 | 深圳市大族激光科技股份有限公司 | Far infrared imaging lens set, objective lens and detector |
| CN114280787A (en) * | 2021-12-24 | 2022-04-05 | 上海摩软通讯技术有限公司 | Bi-pass optical system, lens module and VR equipment |
| CN114442265A (en) * | 2020-11-05 | 2022-05-06 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| US11686923B2 (en) | 2019-09-06 | 2023-06-27 | Zhejiang Sunny Optical, Co., Ltd | Imaging lenses and imaging device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3737095B2 (en) * | 2004-01-16 | 2006-01-18 | マイルストーン株式会社 | Imaging lens |
| CN100485436C (en) * | 2004-10-19 | 2009-05-06 | 恩普乐股份有限公司 | Pick-up lens |
| JP4909673B2 (en) * | 2006-08-10 | 2012-04-04 | 株式会社エンプラス | Imaging lens |
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2009
- 2009-06-30 CN CN 200910108463 patent/CN101937124B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016019539A1 (en) * | 2014-08-07 | 2016-02-11 | 深圳市大族激光科技股份有限公司 | Far infrared imaging lens set, objective lens and detector |
| CN106415351A (en) * | 2014-08-07 | 2017-02-15 | 大族激光科技产业集团股份有限公司 | Far infrared imaging lens set, objective lens and detector |
| CN106415351B (en) * | 2014-08-07 | 2018-07-03 | 大族激光科技产业集团股份有限公司 | Far infrared imagery lens group, object lens and survey meter |
| US10215971B2 (en) | 2014-08-07 | 2019-02-26 | Han's Laser Technology Industry Group Co., Ltd. | Far infrared imaging lens set, objective lens and detector |
| US11686923B2 (en) | 2019-09-06 | 2023-06-27 | Zhejiang Sunny Optical, Co., Ltd | Imaging lenses and imaging device |
| CN114442265A (en) * | 2020-11-05 | 2022-05-06 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN114280787A (en) * | 2021-12-24 | 2022-04-05 | 上海摩软通讯技术有限公司 | Bi-pass optical system, lens module and VR equipment |
| CN114280787B (en) * | 2021-12-24 | 2023-12-22 | 上海摩软通讯技术有限公司 | Bi-pass optical system, lens module and VR equipment |
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| CN101937124B (en) | 2013-01-30 |
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Effective date of registration: 20200108 Address after: 518119 1 Yanan Road, Kwai Chung street, Dapeng New District, Shenzhen, Guangdong Patentee after: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. Address before: 518118 Pingshan Road, Pingshan Town, Shenzhen, Guangdong, No. 3001, No. Patentee before: BYD Co.,Ltd. |
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Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: BYD Semiconductor Co.,Ltd. Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. |