CN101320124A - Camera-lens system - Google Patents
Camera-lens system Download PDFInfo
- Publication number
- CN101320124A CN101320124A CNA2008100682984A CN200810068298A CN101320124A CN 101320124 A CN101320124 A CN 101320124A CN A2008100682984 A CNA2008100682984 A CN A2008100682984A CN 200810068298 A CN200810068298 A CN 200810068298A CN 101320124 A CN101320124 A CN 101320124A
- Authority
- CN
- China
- Prior art keywords
- lens
- camera
- lens system
- formula
- material therefor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Lenses (AREA)
Abstract
The invention discloses a camera lens system which comprises a first biconvex lens with positive focal power, a second biconcave lens with negative focal power, a third meniscus lens with negative focal power and a convex image side, and a fourth with positive focal power and at least one aspheric surface in sequence from object space to image space. In addition, the distance TL between the object plane of the first lens and the imaging plane, the focus f of the camera lens system and the focus f1 of the first lens meet the conditional expression as follows: TL/f is more than 1.1 and less than 1.3, f1/f is more than 0.5 and less than 0.7, so that the camera lens system has advantages of higher pixel, miniaturization and low cost.
Description
Technical field
The present invention relates to a kind of camera-lens system, especially a kind of camera-lens system that is applied on the portable electronic product.
Background technology
In recent years, camera-lens system cooperates with imager chips such as CMOS, CCD, be widely used on the portable equipment, as mobile phone, digital camera, laptop computer, or the like.Along with the development in consumer demand and market, the performance of the imaging apparatus on the portable equipment improves gradually, and, require to possess high pixel simultaneously, cost is low, the advantage of miniaturization, lightness.Thereby the camera-lens system that is applied thereon then is faced with the challenge of high pixel, low cost, miniaturization, lightness.
In the past, miniaturization camera-lens system on the portable equipment generally is made up of two to three pieces of eyeglasses, but along with the raising that properties of product are required and the requirement of high pixel, the number of eyeglass can further increase, as, on August 22nd, 2007 disclosed Chinese patent CN 101021605A and camera-lens system that October in 2007, laid-open U.S. Patents US on the 30th 7289278B1 proposed, the related camera-lens system of this two patent document is all for being made up of four lens.
The pixel of the camera-lens system of being made up of four lens is improved, aspects such as relative size but are being restricted gradually, thereby, aspects such as the optical property of the camera-lens system of forming at existing four lens, manufacture craft, size, cost still have and can further optimize and improved space.
Summary of the invention
The technical matters that the present invention need solve provides a kind of high optical property, and small-sized image pickup lens combination with low cost.
According to the above-mentioned technical matters that needs solution, designed a kind of camera-lens system, its include successively from the object side to the image side lenticular first lens, the negative power of positive light coke double concave second lens, negative power be falcate the 3rd lens of convex, at least one aspheric the 4th lens of positive light coke as the side, and the formula that meets the following conditions:
1.1＜TL/f＜1.3 (1)
0.5＜f1/f＜0.7 (2)
Wherein, TL represents that from the thing side of first lens to the length of imaging surface, f represents the focal length of whole described camera-lens system, and f1 represents the focal length of first lens.
As a further improvement on the present invention, have aperture diaphragm at described first lens as the side.
As a further improvement on the present invention, the combined light focal power of the 3rd lens and the 4th lens is for just.
As a further improvement on the present invention, second lens formula that meets the following conditions:
-0.85＜f2/f＜-0.7 (3)
Wherein, f2 represents the focal length of second lens.
As a further improvement on the present invention, described first lens, second lens, the 3rd lens, the 4th lens are made material therefor and are optical plastic, and the material therefor formula that meets the following conditions:
|Vd2-Vd1|＞25 (4)
|Vd3-Vd4|＞25 (5)
Camera-lens system of the present invention is by the structure distribution of four lens, can make the face shape of lens material, lens and the optical power distribution of each lens reach optimization, therefore realize that high pixel, high performance requirement are issued to miniaturization and requirement cheaply.Especially, by first lens with positive light coke satisfy condition formula (1) and (2), can make more compact structure, help shortening the optical system length overall, to reach the miniaturization of total system.
Description of drawings
Fig. 1 is the cut-open view of the embodiment of the invention one camera-lens system;
Fig. 2 is the cut-open view of the embodiment of the invention two camera-lens systems;
Fig. 3 is the cut-open view of the embodiment of the invention three camera-lens systems;
Fig. 4 is the spherical aberration synoptic diagram of the embodiment of the invention one;
Fig. 5 is the distortion synoptic diagram of the embodiment of the invention one;
Fig. 6 is the aberration synoptic diagram of the embodiment of the invention one;
Fig. 7 is the spherical aberration synoptic diagram of the embodiment of the invention two;
Fig. 8 is the distortion synoptic diagram of the embodiment of the invention two;
Fig. 9 is that the aberration of the embodiment of the invention two is and figure;
Figure 10 is the spherical aberration synoptic diagram of the embodiment of the invention three;
Figure 11 is the distortion synoptic diagram of the embodiment of the invention three;
Figure 12 is the aberration synoptic diagram of the embodiment of the invention three.
Embodiment
The invention will be further described below in conjunction with drawings and embodiments.
As Fig. 1, Fig. 2, shown in Figure 3, camera-lens system of the present invention includes the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4 from the object side to the image side successively along optical axis Z.Each lens includes the two sides of thing side and picture side.The thing side near the side of object space, is the side of close picture side as the side promptly.The aperture diaphragm ST of optics is disposed at the rear side of the first lens L1, promptly is disposed at the picture side of the first lens L1.After the picture side of the 4th lens, also disposed cutoff filter LC, be imaging surface LS after the optical filter LC.
The first lens L1 is the thing side and be the positive lens of convex form as the side, that is, and and the biconvex lens of positive light coke.The second lens L2 is thing side and the double concave lens that are spill and negative power as the side.The 3rd lens L3 is to be the meniscus of convex as the side, and its focal power is for negative.The 4th lens L4 is that the thing side is the positive lens of convex and positive light coke.
Camera-lens system of the present invention satisfies following conditional:
1.1＜TL/f＜1.3 (1)
0.5＜f1/f＜0.7 (2)
Wherein, TL represents that from the thing side of the first lens L1 to the length of imaging surface, f represents the focal length of whole optical system, and f1 represents the focal length of first lens.
Camera-lens system of the present invention is made up of four lens, can make the face shape of lens material, lens and the optical power distribution of each lens reach optimization, therefore is issued to miniaturization and requirement cheaply in the requirement that realizes high pixel.Especially, by the first lens L1 with positive light coke satisfy condition formula (1) and (2), can make more compact structure, help shortening the optical system length overall, to reach the miniaturization of total system.The reason that this camera-lens system satisfies formula (1) and formula (2) is as follows: if the value of TL/f less than 1.1, then the aberration correction of camera lens burden can be overweight, do not satisfy the requirement of high-performance imaging system; If the value of TL/f greater than 1.3, then is unfavorable for the microminiaturization of whole lens combination.Therefore, the value of TL/f satisfies formula (1) can obtain good balance in high-performance and microminiaturization.If the value of f1/f is less than 0.5, then the focal length of first lens is too small, and is too big by the light ray bending of first lens, increased the weight of the burden of the first lens correction aberration, causes aberration excessive; If the value of f1/f is greater than 0.7, then the focal length of first lens is oversize, is unfavorable for the microminiaturization of system.Therefore, the value of f1/f satisfies formula (2), helps the microminiaturization of system.
Camera-lens system of the present invention is disposed at the rear side of the first lens L1 with aperture diaphragm ST, can weaken the tolerance susceptibility, reduces chief ray angle, cooperates with imager chip better and correcting distorted and obtain favorable imaging quality.
The combined light focal power of camera-lens system the 3rd lens L3 of the present invention and the 4th lens L4 is for just, thereby make whole camera-lens system approach symmetrical achromat lens, this has good corrective action for coaxial many aberrations, thereby realizes improving the imaging performance of product.
The focal distance f 2 of the camera-lens system second lens L2 of the present invention satisfies formula (3):
-0.85＜f2/f＜-0.7 (3)。
The reason that the second lens L2 satisfies formula (3) is as follows: if the value of f2/f is less than-0.85, the second lens L2 can bear bigger focal power, though help shortening the optics length overall of whole lens combination, but the tolerance of the position of the air of the first lens L1 and second lens L2 intermittence and aperture diaphragm ST all can diminish, and is unfavorable for the stability of producing; If the value of f2/f is greater than-0.7, the aberration correction difficulty of lens combination will become greatly, and it is big that length also must become.Therefore, the second lens L2 satisfies formula (3) and can keep the aberration variable quantity less and help whole lens combination microminiaturization.And the focal power of first lens L1 and the second lens L2 compensates each other, and this can make whole lens combination size reduce, and aberration characteristic is better.
The camera-lens system first lens L1 of the present invention, the second lens L2, the 3rd lens L3, the 4th lens L4 make material therefor and are optical plastic, the abbe number Vd1 of first lens, the abbe number Vd2 of second lens, the abbe number Vd3 of the 3rd lens, the abbe number Vd4 of the 4th lens formula that meets the following conditions:
|Vd2-Vd1|＞25 (4)
|Vd3-Vd4|＞25 (5)
Conditional above each lens material ground dispersion system satisfies can be greatly improved image quality so that axial chromatic aberration and chromatic longitudiinal aberration all obtain good correction.And material therefor is plastics, then can reduce production costs, and enhances productivity.
Below, describe according to the concrete data of each embodiment and corresponding aberration performance synoptic diagram again.
In each embodiment, " f number " (being the f-number of imaging apparatus)=2.8.The aspherical shape expression of each lens is formula (6):
Z(x)＝r
-1x
-2/(1+(1-(k+1)r
-2x
2)
1/2)+Ax
4+Bx
6+Cx
8+Dx
10+Ex
12+Fx
14+Gx
16 (6)
The aspherical shape of lens is: the direction with optical axis is the Z axle, is X-axis with the direction (short transverse) with light shaft positive cross, and the direction that enters with light is the circular cone coefficient for just with K, and A, B, C, D, E, F, G are asphericity coefficient, are the curvature of centre radius with r.
In following each form: i presentation surface numbering, r
iThe curvature of centre radius of representing the i face; D
iRepresent the distance of i face culminating point, D to i+1 face culminating point
11Be the 11st distance to imaging surface LS; Nd represents the refractive index of each eyeglass to d line (wavelength 587.6nm); Vd represents the abbe number of each eyeglass;
[embodiment one]
The master data of embodiment one camera-lens system sees Table 1 (A), table 1 (B), other related data: f=4.79, f1=2.48, f2=-3.59, TL=5.795.
Table 1 (A)
The asphericity coefficient data are as follows:
| i | A | B | C | D | E | F | G | K |
| 1 | -0.0197 | 0.0024 | -0.0001 | -0.0390 | 0.0490 | -0.0292 | 0.0013 | 0.5126 |
| 2 | 0.1030 | -0.1472 | 0.0492 | 0.0732 | -0.1073 | -0.0202 | 0.0535 | -19.7623 |
| 4 | 0.2710 | -0.3278 | 0.3098 | -0.1576 | 0.0761 | -0.1616 | 0.1663 | 26.0177 |
| 5 | 0.1464 | -0.1575 | -0.0281 | 0.5351 | -1.0909 | 0.9506 | -0.3159 | -21.5857 |
| 6 | 0.2521 | -0.4634 | 0.4755 | 0.1574 | -0.7397 | 0.6192 | -0.1912 | -0.5506 |
| 7 | -0.0215 | 0.0203 | -0.0137 | 0.0724 | -0.0386 | -0.0012 | 0.0028 | -0.4171 |
| 8 | -0.0443 | 0.0241 | -0.0053 | 0.0004 | 0.0000 | 0.0000 | 0.0000 | -10.2507 |
| 9 | -0.0800 | 0.0170 | -0.0024 | 0.0002 | 0.0000 | 0.0000 | 0.0000 | -0.7108 |
Table 1 (B)
Can draw from top data, TL/f=1.2, f1/f=0.519, f2/f=-0.749, Vd2-Vd1=26, Vd3-Vd4=26, the formula that satisfies condition (1)-(5), the combined focal length f34=19.75 of the 3rd lens and the 4th lens is also for just.
[embodiment two]
The master data of embodiment two camera-lens systems sees Table 2 (A), table 2 (B), other related data: f=4.8, f1=2.6, f2=-3.72, TL=5.83.
Table 2 (A)
The asphericity coefficient data are as follows:
| i | A | B | C | D | E | F | G | K |
| 1 | -0.0184 | 0.0076 | -0.0063 | -0.0323 | 0.0486 | -0.0288 | 0.0006 | 0.5441 |
| 2 | 0.0804 | -0.1201 | 0.0620 | 0.0378 | -0.1201 | 0.0412 | 0.0188 | -24.2159 |
| 4 | 0.1261 | -0.2007 | 0.1974 | -0.2103 | 0.1540 | -0.0940 | 0.0359 | -162.0830 |
| 5 | 0.0264 | -0.0632 | 0.0212 | -0.0049 | 0.0201 | 0.0011 | 0.0087 | 2.2822 |
| 6 | 0.2386 | -0.4191 | 0.3649 | 0.2575 | -0.7402 | 0.5533 | -0.1559 | -0.6223 |
| 7 | -0.0151 | 0.0341 | -0.0144 | 0.0698 | -0.0391 | -0.0002 | 0.0025 | 0.0254 |
| 8 | -0.0376 | 0.0231 | -0.0052 | 0.0004 | 0.0000 | 0.0000 | 0.0000 | -11.6506 |
| 9 | -0.0751 | 0.0143 | -0.0022 | 0.0002 | 0.0000 | 0.0000 | 0.0000 | -0.1766 |
Table 2 (B)
Can draw from top data, TL/f=1.22, f1/f=0.54, f2/f=-0.66, Vd2-Vd1=27, Vd3-Vd4=27, the formula that satisfies condition (1)-(5), the combined focal length of the 3rd lens and the 4th lens is f34=19.3, also for just.
[embodiment three]
The master data of embodiment three camera-lens systems sees Table 3 (A), table 3 (B), other related data: f=4.99, f1=2.57, f2=-3.6, TL=5.88.
Table 3 (A)
The asphericity coefficient data are as follows:
| i | A | B | C | D | E | F | G | K |
| 1 | -0.0237 | 0.0169 | -0.0123 | -0.0468 | 0.0550 | -0.0208 | -0.0038 | 0.4704 |
| 2 | 0.1047 | -0.1462 | 0.0480 | 0.0725 | -0.1001 | -0.0079 | 0.0350 | -20.5995 |
| 4 | 0.2706 | -0.3193 | 0.3037 | -0.1643 | 0.0978 | -0.1437 | 0.1546 | 27.5110 |
| 5 | 0.1627 | -0.1636 | 0.0204 | 0.5380 | -1.0771 | 0.9596 | -0.3243 | -2.3980 |
| 6 | 0.2873 | -0.4671 | 0.4027 | 0.1229 | -0.7183 | 0.6507 | -0.2033 | -0.7050 |
| 7 | 0.0001 | 0.0017 | 0.0007 | 0.0000 | -0.0002 | -0.0001 | 0.0000 | -0.9606 |
| 8 | -0.0455 | 0.0235 | -0.0053 | 0.0004 | 0.0000 | 0.0000 | 0.0000 | -9.3974 |
| 9 | -0.0800 | 0.0170 | -0.0024 | 0.0002 | 0.0000 | 0.0000 | 0.0000 | -0.5665 |
Table 3 (B)
Can draw from top data, TL/f=1.18, f1/f=0.515, f2/f=-0.72, Vd2-Vd1=27, Vd3-Vd4=30, the formula that satisfies condition (1)-(5), the combined focal length of the 3rd lens and the 4th lens is that f34=36.36 is also for just.
Fig. 4, Fig. 5, Fig. 6 according to data and embodiment one correspondence in above each table, Fig. 7, Fig. 8, Fig. 9 of embodiment two correspondences, the good aberration that is showed among Figure 10, Figure 11 of embodiment three correspondences, Figure 12, can draw, camera-lens system of the present invention has the advantage of high optical property, miniaturization, and with low cost.Wherein on behalf of wavelength, the C line be approximately the aberration of 656nm in each aberration diagram, and on behalf of wavelength, the D line be approximately differing of 588nm, and on behalf of wavelength, the F line be approximately the aberration of 486nm.
Above-described only is embodiments of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (5)
1, a kind of camera-lens system, it is characterized in that: described camera-lens system include successively from the object side to the image side lenticular first lens, the negative power of positive light coke double concave second lens, negative power be falcate the 3rd lens of convex, at least one aspheric the 4th lens of positive light coke as the side, and the formula that meets the following conditions:
1.1＜TL/f＜1.3 (1)
0.5＜f1/f＜0.7 (2)
Wherein, TL represents that from the thing side of first lens to the length of imaging surface, f represents the focal length of whole described camera-lens system, and f1 represents the focal length of first lens.
2, camera-lens system according to claim 1 is characterized in that: have aperture diaphragm at described first lens as the side.
3. camera-lens system according to claim 1 and 2 is characterized in that: the combined light focal power of the 3rd lens and the 4th lens is for just.
4. camera-lens system according to claim 1 and 2 is characterized in that: second lens formula :-0.85＜f2/f＜-0.7 (3) that meets the following conditions
Wherein, f2 represents the focal length of second lens.
5. camera-lens system according to claim 1 and 2 is characterized in that: described first lens, second lens, the 3rd lens, the 4th lens are made material therefor and are optical plastic, and the material therefor formula that meets the following conditions:
|Vd2-Vd1|＞25 (4)
|Vd3-Vd4|＞25 (5)
Vd1 represents the abbe number of the first lens material therefor;
Vd2 represents the abbe number of the second lens material therefor;
Vd3 represents the dispersion system of the 3rd lens material therefor;
Vd4 represents the abbe number of the 4th lens material therefor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100682984A CN101320124A (en) | 2008-07-04 | 2008-07-04 | Camera-lens system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100682984A CN101320124A (en) | 2008-07-04 | 2008-07-04 | Camera-lens system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101320124A true CN101320124A (en) | 2008-12-10 |
Family
ID=40180273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100682984A Pending CN101320124A (en) | 2008-07-04 | 2008-07-04 | Camera-lens system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101320124A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI400477B (en) * | 2009-01-09 | 2013-07-01 | Hon Hai Prec Ind Co Ltd | Imaging lens |
| CN106094164A (en) * | 2016-03-18 | 2016-11-09 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN109324392A (en) * | 2018-12-11 | 2019-02-12 | 中国科学院长春光学精密机械与物理研究所 | A kind of intermediate waves broadband infrared optical system and remote sensing optical device |
| RU2718145C1 (en) * | 2019-09-30 | 2020-03-30 | Акционерное общество "Вологодский оптико-механический завод" | Fast infrared lens |
| TWI730517B (en) * | 2019-11-29 | 2021-06-11 | 大立光電股份有限公司 | Lens system and electronic device |
| CN114002808A (en) * | 2021-10-25 | 2022-02-01 | 季华实验室 | Infrared imaging optical system |
| CN114280758A (en) * | 2021-02-07 | 2022-04-05 | 宁波舜宇车载光学技术有限公司 | Optical lens and electronic device |
| RU2806167C1 (en) * | 2023-04-19 | 2023-10-26 | Акционерное общество "Вологодский оптико-механический завод" | High-aperture infrared lens |
-
2008
- 2008-07-04 CN CNA2008100682984A patent/CN101320124A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI400477B (en) * | 2009-01-09 | 2013-07-01 | Hon Hai Prec Ind Co Ltd | Imaging lens |
| CN106094164A (en) * | 2016-03-18 | 2016-11-09 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN106094164B (en) * | 2016-03-18 | 2018-09-25 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN109324392B (en) * | 2018-12-11 | 2021-07-16 | 中国科学院长春光学精密机械与物理研究所 | Medium-short wave broadband infrared optical system and remote sensing optical equipment |
| CN109324392A (en) * | 2018-12-11 | 2019-02-12 | 中国科学院长春光学精密机械与物理研究所 | A kind of intermediate waves broadband infrared optical system and remote sensing optical device |
| RU2718145C1 (en) * | 2019-09-30 | 2020-03-30 | Акционерное общество "Вологодский оптико-механический завод" | Fast infrared lens |
| TWI730517B (en) * | 2019-11-29 | 2021-06-11 | 大立光電股份有限公司 | Lens system and electronic device |
| US11327277B2 (en) | 2019-11-29 | 2022-05-10 | Largan Precision Co., Ltd. | Lens system and electronic device |
| US11640046B2 (en) | 2019-11-29 | 2023-05-02 | Largan Precision Co., Ltd. | Lens system and electronic device |
| US11940598B2 (en) | 2019-11-29 | 2024-03-26 | Largan Precision Co., Ltd. | Lens system and electronic device |
| CN114280758A (en) * | 2021-02-07 | 2022-04-05 | 宁波舜宇车载光学技术有限公司 | Optical lens and electronic device |
| CN114002808A (en) * | 2021-10-25 | 2022-02-01 | 季华实验室 | Infrared imaging optical system |
| CN114002808B (en) * | 2021-10-25 | 2023-06-30 | 季华实验室 | Infrared imaging optical system |
| RU2806167C1 (en) * | 2023-04-19 | 2023-10-26 | Акционерное общество "Вологодский оптико-механический завод" | High-aperture infrared lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10209490B2 (en) | Optical imaging system for pickup | |
| CN106483637B (en) | Camera lens | |
| US8395852B2 (en) | Optical imaging lens assembly | |
| CN103502868B (en) | Imaging lens system and the camera head being provided with this imaging lens system | |
| CN103777310B (en) | Optical image pickup system set | |
| US7385770B2 (en) | Imaging lens system | |
| CN103676085B (en) | Image capturing lens assembly | |
| CN103135203B (en) | Imaging Optical Lens System | |
| US20140368927A1 (en) | Photographing lens assembly | |
| US20130182336A1 (en) | Image capturing system | |
| US9612423B2 (en) | Camera lens system | |
| CN102736214B (en) | Image capturing photographing lens assembly | |
| US20110058089A1 (en) | Imaging lens assembly | |
| CN203773136U (en) | Imaging lens and imaging device comprising the same | |
| CN103309020A (en) | Optical imaging lens assembly | |
| CN103529538A (en) | Image lens assembly | |
| CN104965295A (en) | Image lens system set | |
| JP2011221355A (en) | Imaging lens and imaging module | |
| JP2005284153A (en) | Imaging lens | |
| CN103837964A (en) | Image capturing lens assembly | |
| CN108351494B (en) | Imaging lens | |
| CN101320124A (en) | Camera-lens system | |
| CN102692695A (en) | Image capturing lens assembly | |
| CN102955225A (en) | Imaging lens | |
| CN102269861A (en) | Optical lens group for shooting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081210 |