CN201054036Y - Two lens type optical imaging lens - Google Patents
Two lens type optical imaging lens Download PDFInfo
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- CN201054036Y CN201054036Y CNU2006201756159U CN200620175615U CN201054036Y CN 201054036 Y CN201054036 Y CN 201054036Y CN U2006201756159 U CNU2006201756159 U CN U2006201756159U CN 200620175615 U CN200620175615 U CN 200620175615U CN 201054036 Y CN201054036 Y CN 201054036Y
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Abstract
The utility model relates to a two-lens optical taking lens which consists in sequence on a same optical axis from the object side of a first lens piece with a plus diopter, which is a crescent non-spherical lens and the convex side of which is on the object side; a second lens piece with a plus diopter, which is a crescent non-spherical lens and the convex side of which is on the image side; an infrared optical filter and an image sensor. The taking lens meets the following conditions, i.e. d is more than or equal to 0.2f and less than 1f, the absolute value of R3 is more than 0 and less than or equal to 100f, the absolute value of f2 / the absolute value of f1 is more than 0.01 and less than 3, and Vd is more than or equal to 20 and less than or equal to 85, wherein, f is the effective focal length of the taking lens (system), d is the distance between the object flank of the first lens piece and the image flank of the second lens piece, R3 is the curvature radius of the object flank of the second lens piece, f1 is the effective focal length of the first lens piece, f2 is the effective focal length of the second lens piece, and Vd is the Abbe number for the two lens pieces. In this way, the taking lens is provided with a high resolution, the length of the lens can be reduced effectively and the taking lens is facilitated to have a smaller bulk and a lower cost, thereby the applicability of the taking lens is enhanced.
Description
Technical field
The utility model is relevant a kind of two eyeglass formula optical shooting lens, mainly be camera lens at mobile lens or use CCD (the electric charge lotus root attaches together and puts) or CMOS image sensors such as (complementary metal oxide semiconductor (CMOS)s), and a kind of optical shooting lens that constitutes by two lens of design.
Background technology
Progress along with science and technology, electronic product constantly develops towards compact and multi-functional direction, and in the electronic product as: digital camera (Digital Still Camera), computer cameras (P C camera), network cameras (Network camera), mobile phone etc. possessed image-taking device (camera lens) outside, even personal digital assistance devices such as (PDA) also has the demand that adds image-taking device (camera lens); And for easy to carry with meet the demand of hommization, image-taking device not only needs to have favorable imaging quality, also need simultaneously smaller volume and lower cost, also the beginning can effectively promote the application of described image-taking device, especially be applied on the mobile phone (mobile phone), above-mentioned needs or condition are then even more important.
Because the material selectivity of traditional sphere abrading glass lens is more, and it is comparatively favourable for revising aberration, widely industry is used, but when sphere abrading glass lens were applied in the situation that burnt number (F number) is less and field angle (field angle) is bigger, the correction of aberrations such as spherical aberration and astigmatism was still relatively more difficult; And in order to improve the shortcoming of above-mentioned traditional sphere abrading glass lens, present image-taking device is existing to be used aspherical plastic lens or uses the aspheric surface molded glass lens, to obtain preferable image quality, as: the U.S. the 6th, 813, No. 095 " OPTICALIMAGEPICK-UPLENS " patent of invention, the U.S. the 6th, 031, No. 670 " WIDE-ANGLE LENS " patents of invention, or TOHKEMY 2001-183578 number (P2001-183578A) " capture LENS " etc., but the total length of existing optical image-taking device (camera lens) part is still excessive, in the lens combination as TOHKEMY P2001-183578A " capture LENS ", first of its first lens piece to second of second lens piece be more than or equal to 0.9f (d 〉=0.9f apart from d, f is the effective focal length of lens combination integral body), make sampling image lens can't have smaller size smaller or lower cost, be difficult for satisfying electronic product and make every effort to compact demand, the relative application that has also limited sampling image lens especially can't be applied on the mobile phone easily.
Summary of the invention
The utility model fundamental purpose is to be to provide a kind of two eyeglass formula optical shooting lens, comprise in regular turn by the thing side: first lens piece of a positive diopter, second lens piece of one positive diopter, one infrared filter and an image sensor, and with common optical axis arrangement formation, wherein, first, two lens pieces all are lunate aspheric surface molded glass lens, and the convex surface of first lens piece (convex surface) is in the thing side, and the convex surface of second lens piece is in the picture side, has high resolving power and can effectively dwindle two eyeglass formula optical shooting lens of camera lens total length to constitute one.Aforesaid sampling image lens meets the following conditions: 0.2f≤d＜1f, 0＜| R3|≤100f, 0.01＜| f2|/| f1|＜3, with 20≤Vd≤85; Wherein, f is sampling image lens (system) effective focal length, d is the distance of the thing side convex surface of first lens piece to the picture side convex surface of second lens piece, R3 is the radius-of-curvature of the second lens piece thing side, f1 is the effective focal length of first lens piece, f2 is the effective focal length of second lens piece, and Vd is the Abbe number (Abbe ' s number) of first lens piece and second lens piece; So that sampling image lens has high resolving power and can effectively dwindle lens length, make sampling image lens have smaller size smaller and lower cost, and promote the application of sampling image lens.
As a kind of improvement of the present utility model, the convex surface of first lens piece of described two eyeglass formula optical shooting lens and concave surface can have one side for aspheric surface, can certainly two-sidedly be aspheric surface; The convex surface of described second lens piece and concave surface can have one side for aspheric surface, can certainly two-sidedly be aspheric surface.
As another kind of improvement the of the present utility model, described sampling image lens also is provided with a preposition aperture, its aperture diaphragm is on the thing side convex surface (convex object-side surface) that is positioned at first lens piece, effectively dwindling the total length of camera lens, thereby promotes the application of sampling image lens.
Description of drawings
Fig. 1 is the optical texture synoptic diagram of the utility model one embodiment;
Fig. 2 is the light path synoptic diagram of the utility model one embodiment;
Fig. 3 is the lateral light fan figure (transverse ray fan plot) of five different visual fields (actual image height 0,0.355,0.71,1.065,1.42mm) of the utility model one embodiment;
Fig. 4 is the curvature of field (field curvature) figure of the imaging of the utility model one embodiment;
Fig. 5 is distortion (distortion) figure of the imaging of the utility model one embodiment;
Modulation transfer function (the modulation transfer function) figure that Fig. 6 is produced when being corresponding 0 to the 120LP/mm spatial frequencys in five visual fields (actual image height 0,0.355,0.71,1.065,1.42mm) of the utility model one embodiment (spatial frequency);
Fig. 7 is relative exposure (relativeillumination) figure that corresponding zero visual field, full visual field embodiment illustrated in fig. 1 is produced.
Description of reference numerals: L1-first lens piece; The 11-convex surface; The 12-concave surface; The 13-aperture diaphragm; L2-second lens piece; The 21-convex surface; The 22-concave surface; The 3-infrared filter; The 4-image sensor; The 41-sensing face.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
With reference to Fig. 1, shown in 2, it is respectively structural representation and the light path synoptic diagram of the utility model one embodiment, two eyeglass formula optical shooting lens of the present utility model (optical imaging lens), by the thing side in regular turn (in orderfrom the object side) comprise: first lens piece of a positive diopter (first lens element ofpositiverefractive power) L1, second lens piece of one positive diopter (second lens element of positiverefractive power) L2, one infrared filter (IR cut-off filter) 3, with an image sensor (imagesensing chip) 4, and arrange formation in regular turn with a common optical axis (optical axis) X, as shown in Figure 1; During capture, light is first through behind the first lens piece L1 and the second lens piece L2, is imaged on the sensing face 41 of image sensor 4 through an infrared filter 3, as shown in Figure 2 again.
The described first lens piece L1 is a lunate molded glass lens, and its convex surface 11 is at thing side (onthe object side), and convex surface (convex lens surface) 11 has at least one side to be aspheric surface with concave surface 12; The second lens piece L2 is a lunate molded glass lens, and its convex surface 21 is in picture side (on the imageside), and convex surface 21 has at least one side to be aspheric surface with concave surface 22; Sampling image lens of the present utility model again is provided with a preposition aperture, and its aperture diaphragm (aperture stop) the 13rd is positioned on the thing side convex surface 11 of the first lens piece L1 as shown in Figure 1, 2.
The utility model two eyeglass formula optical shooting lens meet the following conditions:
0.2f≤d＜1f；
0＜|R3|≤100f；
0.01＜| f2|/| f1|＜3: with
20≤Vd≤85；
Wherein, f is the lens system effective focal length, d is the distance of the convex surface 11 (thing side) of the first lens piece L1 to the convex surface 21 (as the side) of the second lens piece L2, R3 is the radius-of-curvature of the second lens piece thing side, f1 is the effective focal length of first lens piece, f2 is the effective focal length of second lens piece, with Vd be the Abbe number (Abbe ' s number) of first lens piece and second lens piece.Rely on said structure, make the utility model sampling image lens have high resolving power and can effectively dwindle lens length, make sampling image lens have smaller size smaller and lower cost, and promote the application of sampling image lens.
Exemplify a preferred embodiment below and be described as follows:
Show the optical surface number # (surface number) that numbers (in order from the object side) by the thing side in regular turn respectively in the following tabulation (), each optical surface kenel (Type), (the unit: mm) (the radius of curvature R) of the radius of curvature R of each optical surface on optical axis, on the optical axis between each face apart from D (unit: mm) (the on-axis surface spacing), with the eyeglass material.
Table (one)
| Surf# optical surface number | The Type kenel | The R radius-of-curvature | The D spacing | The eyeglass material |
| Object (OBJ) | STANDARD | ∞ | ∞ | |
| 1 (STO) aperture diaphragm ( |
The EVENASPH aspheric surface | 0.6208799 | 0.39 | N-SK57 |
| 2 ( |
The EVENASPH aspheric surface | 0.8876672 | 0.32 | |
| 3 ( |
The EVENASPH aspheric surface | -3.580208 | 0.6 | N-SK57 |
| 4 ( |
The EVENASPH aspheric surface | -1.993002 | 0.5 | |
| The thing side of 5 |
STANDARD | ∞ | 0.145 | BK7 |
| The picture side of 6 |
STANDARD | ∞ | 0.5702734 | |
| The sensing face of image sensor (1MG) | STANDARD | ∞ |
Every asphericity coefficient (coeff.) of each optical surface is shown in following tabulation (two):
Table (two)
| Conic K | Coeffon A | Coeffon B | Coeffon C | Coeffon D | Coeffon E | Coeffon F | Coeffon G |
| 0 | 5 | ||||||
| 2.5582827 | -1.601611 | 38.318041 | -565.9495 | 4036.5911 | -11467.87 | 0 | 0 |
| 3.272712 | 4.2482342 | -7.529695 | 69.402686 | -199.7694 | 0 | 0 | 0 |
| 0 | -0514621 | 06430439 | -2.74182 | 15.105232 | 0 | 0 | 0 |
| 00621767 | -0178999 | 22080681 | -10.38657 | 83666404 | -185.3604 | 209.50246 | -9605938 |
| 0 | 10 | ||||||
| 0 | |||||||
| 0 |
And, Z=ch2/{1+[1-(1+K) c2h2] 1/2}+Ah4+Bh6+Ch8+Dh10+EH12+Fh14+Gh16 is its aspheric surface equation (A spherical Surface Formula), wherein, c is a curvature, h is the eyeglass height, K is circular cone coefficient (Conic Constant), and A is the asphericity coefficient (4 of quadravalence
ThOrder A sphericalCoefficient), B is the asphericity coefficient (6 on six rank
ThOrder A spherical Coefficient), C is eight rank asphericity coefficients (8
ThOrder A spherical Coefficient), D is the asphericity coefficient (10 on ten rank
ThOrder A spherical Coefficient), E is the asphericity coefficient (12 of ten second orders
ThOrder A sphericalCoefficient), F is ten quadravalence asphericity coefficients (14
ThOrder A spherical Coefficient), G is the asphericity coefficient (16 on 16 rank
ThOrder A spherical Coefficient).And the material of first and second lens piece L1, the L2 of present embodiment all is a glass, can utilize the moulded glass material of model N-SK57, and the material of infrared filter 3 is a glass, can adopt the glass material of BK7, and its thickness is 0.145mm.
The effective focal length f of lens system is 2.07268mm, and the convex surface 11 of the first lens piece L1 (thing side) to the convex surface 21 (as the side) of the second lens piece L2 be 1.31mm apart from d, can satisfy condition: 0.2f≤d＜1f; And the radius of curvature R 3=-3.580208mm of the concave surface 22 of the second lens piece L2 (thing side) can satisfy condition: 0＜| R3|≤100f; And the effective focal length f1 of the first lens piece L1 is 2.284mm, and the effective focal length f2 of the second lens piece L2 is 6.719mm, its | f2|/| f1|=2.942 can satisfy condition: 0.01＜| f2|/| f1|＜3; And the Abbe number of first lens piece and second lens piece (Abbe ' s number) Vd is 59.6, can satisfy condition: 20≤Vd≤85.
Please refer to Fig. 3 to shown in Figure 7, it is respectively five different visual fields (actual image height 0 of present embodiment, 0.355,0.71,1.065,1.42mm) lateral light fan figure (transverse ray fan plot), the curvature of field figure of imaging (field curvature) figure, the distortion of imaging (distortion) figure, five visual field (actual image heights 0,0.355,0.71,1.065,1.42mm) modulation transfer function (the modulation transfer function) figure that produced during corresponding 0 to 120LP/mm spatial frequency (spatial frequency), relative exposure (relative illumination) figure that corresponding zero visual field with full visual field is produced; And rely on above-mentioned table (), table (two) and Fig. 3 to shown in Figure 7, the camera lens total length (totallength) of the utility model sampling image lens is 2.52527mm as can be known, provable sampling image lens of the present utility model has high resolving power and can effectively dwindle lens length again, make to the utlity model has smaller size smaller and lower cost, and can promote application of the present utility model.
More than shown in only be preferred embodiment of the present utility model, only be illustrative for the utility model, and nonrestrictive.Those skilled in the art is appreciated that in the spirit and scope that the utility model claim is limited can carry out many changes and modification to it, even the equivalence change, but all will fall in this novel protection domain.
Claims (8)
1. eyeglass formula optical shooting lens, it is characterized in that: it comprises in regular turn along same optical axis and by the thing side:
First lens piece of one positive diopter, it is a meniscus non-spherical lens, and its convex surface is in the thing side;
Second lens piece of one positive diopter, it is a meniscus non-spherical lens, and its convex surface is in the picture side;
One infrared filter; With
One image sensor;
Wherein, meet the following conditions:
0.2f≤d＜1f；
0＜|R3|≤100f；
0.01＜| f2|/| f1|＜3; With
20≤Vd≤85；
Wherein, f is the camera lens effective focal length, d is that the thing side of first lens piece is to the distance of second lens piece as the side, R3 is the radius-of-curvature of the second lens piece thing side, f1 is the effective focal length of first lens piece, f2 is the effective focal length of second lens piece, and Vd is the Abbe number of first lens piece and second lens piece.
2. two eyeglass formula optical shooting lens according to claim 1 is characterized in that: the convex surface of described first lens piece and concave surface have at least one side to be aspheric surface.
3. two eyeglass formula optical shooting lens according to claim 1 is characterized in that: the convex surface of described second lens piece and concave surface have at least one side to be aspheric surface.
4. two eyeglass formula optical shooting lens according to claim 1, it is characterized in that: described optical shooting lens also is provided with a preposition aperture.
5. two eyeglass formula optical shooting lens according to claim 4 is characterized in that: the aperture diaphragm of described optical shooting lens is to be positioned on the thing side convex surface of first lens piece.
6. two eyeglass formula optical shooting lens according to claim 1 is characterized in that: described first lens piece is to utilize the moulded glass material to make.
7. two eyeglass formula optical shooting lens according to claim 1 is characterized in that: described second lens piece is to utilize the moulded glass material to make.
8. two eyeglass formula optical shooting lens according to claim 1, it is characterized in that: described infrared filter is to utilize glass material to make, and its thickness is 0.145mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201756159U CN201054036Y (en) | 2006-12-26 | 2006-12-26 | Two lens type optical imaging lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201756159U CN201054036Y (en) | 2006-12-26 | 2006-12-26 | Two lens type optical imaging lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201054036Y true CN201054036Y (en) | 2008-04-30 |
Family
ID=39393698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201756159U Expired - Fee Related CN201054036Y (en) | 2006-12-26 | 2006-12-26 | Two lens type optical imaging lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201054036Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881876A (en) * | 2010-07-02 | 2010-11-10 | 浙江舜宇光学有限公司 | Micro pick-up lens |
| CN102932588A (en) * | 2012-11-20 | 2013-02-13 | 无锡成电科大科技发展有限公司 | Image acquisition device with rotating mechanism |
| CN113504631A (en) * | 2021-07-22 | 2021-10-15 | 广东旭业光电科技股份有限公司 | Lens assembly and light and thin camera lens |
-
2006
- 2006-12-26 CN CNU2006201756159U patent/CN201054036Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881876A (en) * | 2010-07-02 | 2010-11-10 | 浙江舜宇光学有限公司 | Micro pick-up lens |
| CN102932588A (en) * | 2012-11-20 | 2013-02-13 | 无锡成电科大科技发展有限公司 | Image acquisition device with rotating mechanism |
| CN102932588B (en) * | 2012-11-20 | 2016-10-05 | 无锡成电科大科技发展有限公司 | There is the image collecting device of rotating mechanism |
| CN113504631A (en) * | 2021-07-22 | 2021-10-15 | 广东旭业光电科技股份有限公司 | Lens assembly and light and thin camera lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20141226 |
|
| EXPY | Termination of patent right or utility model |