CN201054035Y - Three lens type optical imaging lens - Google Patents
Three lens type optical imaging lens Download PDFInfo
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- CN201054035Y CN201054035Y CNU200620175613XU CN200620175613U CN201054035Y CN 201054035 Y CN201054035 Y CN 201054035Y CN U200620175613X U CNU200620175613X U CN U200620175613XU CN 200620175613 U CN200620175613 U CN 200620175613U CN 201054035 Y CN201054035 Y CN 201054035Y
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Abstract
The utility model relates to a three-lens optical taking lens which consists in sequence from the object side of a first lens piece with a plus diopter, which is a crescent non-spherical lens; a second lens piece with a minus diopter, which is a crescent non-spherical lens; a third lens piece with a minus diopter, which is an M-shaped non-spherical lens, the object flank and the image flank of which are both M-shaped and can be convex or concave on the central surface of the optical axis; an infrared optical filter and an image sensor. The utility model meets the following conditions, i.e. d is more than or equal to 0.4f and less than 0.9f, the absolute value of R1/R2 is more than 0.3 and less than 0.6, Fno is more than or equal to 2.8 and less than 3.6, br/f is more than 0.2 and less than 0.4, f1/f is more than 0.5 and less than 1, f3/f is more than -0.40 and less than -1.1, wherein, f and Fno are the effective focal length and the focal number of the system, d is the distance between the object flank of the first lens piece and the image flank of the third lens piece, R1 is the curvature radius of the object flank of the first lens piece, R2 is the curvature radius of the image flank of the first lens piece, Fno is the focal number of the taking lens system, br is the back focal length of the taking lens system, and f1 and f3 are the effective focal lengths of the first lens piece and the third lens piece respectively, thereby achieving the goal of upgrading the applicability of the taking lens effectively.
Description
Technical field
The utility model is relevant a kind of prismatic glasses formula optical shooting lens (optical imaging 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 three lens (lens elements) that provides.
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 (PC 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, can effectively promote the application of described image-taking device like this, especially be applied on the mobile phone, above-mentioned needs or condition are then even more important.
And because the material selectivity of traditional sphere abrading glass lens is more, and aberration is comparatively favourable for revising, now 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 overcome 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 U.S.'s patent of invention: US6,795,253, US6,961,191, US6,441,971, Pub.No.US2004/0061953A1, Pub.No.US2004/0190158A1, Pub.No.US2004/0190162A1, Pub.No.US2004/023 1823A1, Pub.No.US2005/0231822A1, or as Japanese patent of invention: specially permit No. 3567327, specially permit No. 3717488, specially permit No. 3768509, specially permit No. 3816095, open 2005-084404 number of special permission, open 2006-047858 number of special permission, open 2005-309210 number of special permission, open 2005-227755 number of special permission, open 2005-345919 number of special permission, open 2005-292235 number of special permission, open 2004-004566 number of special permission, many optical shooting lens structural designs that comprise prismatic glasses group (lenscomponents)/prismatic glasses (lens elements) such as special permission discloses 2005-338234 number; And the structural design of above-mentioned many patents of invention all comprises basically, by thing side (in order from the object side) in regular turn: first, two, third-class prismatic glasses group (lens components)/eyeglass (lens elements), then determine variation or combination as for above-mentioned many patents of invention difference place or technical characterictic each other: the shaped design difference of corresponding matching between the prismatic glasses group/eyeglass described in each part patent at following various factors, as first, two, third-class prismatic glasses group/eyeglass all is meniscus (meniscus shape) lens, or first, two lens set/eyeglass is a meniscus and prismatic glasses group/eyeglass is platycelous (plan o-concave shape) or planoconvex (plan o-convexshape); With/or each part patent described in prismatic glasses group/eyeglass between the convex surface/concave direction of corresponding matching different, can be arranged in thing side/as the convex surface/concave surface of the first/two/third-class prismatic glasses group/eyeglass as multiple variation combinations such as sides; With/or each part patent described in prismatic glasses group/eyeglass between corresponding matching diopter (refractivepower) just/negative different, as the diopter of first, second and third group/eyeglass such as prismatic glasses such as grade be in regular turn positive and negative, just or just, different variations such as positive and negative make up; With/or each part patent described in prismatic glasses group/eyeglass between relevant optical data, as f (effective focal length of sampling image lens system), d (the first lens piece thing side to the, three lens are as the distance of side), R1 (radius-of-curvature of the first lens piece thing side), R2 (first lens piece is as the radius-of-curvature of side), Fno (the burnt number of sampling image lens system), br (back focal length of sampling image lens system), f1 (effective focal length of first lens piece), f3 (effective focal length of the 3rd lens piece) etc., the condition difference of Man Zuing respectively, as 0.8＜f1/f＜2.0,0.5＜(| R2|-R1)/(R1+|R2|), specially permit No. 3717488 with reference to Japan with 1.5＜f3/f＜3.0 grades; As from the foregoing, with regard to the design of the optical shooting lens of a prismatic glasses group/eyeglass, its designing technique is not difficult especially in the optical shooting lens technical field, even can be considered prior art, as long as and can in above-mentioned various factors, work out different variations or combination, promptly can be considered and have novelty (novelty) or progressive (inventive step), can apply for and be authorized to be a patent.Yet, the total length of above-mentioned optical shooting lens is still excessive, make sampling image lens can't have smaller size smaller or lower cost, and the correction elimination of aberration or the reduction of chief ray angle are also not satisfactory, be difficult for satisfying electronic product and make every effort to compact and high performance requirement, 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 discloses a kind of prismatic glasses formula optical shooting lens (imaging lens), it is comprised in regular turn by the thing side: first lens piece of a positive diopter (a first lens element of positive refractivepower), be a meniscus non-spherical lens, and its convex surface is in the thing side; Second lens piece of one negative diopter (negativerefractive power) is a meniscus non-spherical lens, and its convex surface is in the picture side; One negative dioptric the 3rd lens piece is a M font non-spherical lens, and its thing side is the M font all with the picture side, and its median plane at optical axis can be convex surface or concave surface; One infrared filter; With an image sensor; And with same optical axis arrangement formation; And, described sampling image lens meets the following conditions: 0.4f≤d＜0.9f, 0.3＜| R1/R2|＜0.6,2.8≤Fno＜3.6,0.2＜br/f＜0.4,0.5＜f1/f＜1 is with-4.0＜f3/f＜-1.1, wherein, f is the effective focal length of this sampling image lens system, d is the distances of the first lens piece thing side to the, three lens as the side, and R1 is the radius-of-curvature of the first lens piece thing side, and R2 is the radius-of-curvature of first lens piece as the side, Fno is the burnt number of this sampling image lens system, br is the back focal length of this sampling image lens system, and f1 is the effective focal length of first lens piece, and f3 is the effective focal length of the 3rd lens piece; With effective school anaberration with reduce chief ray angle, make 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.
As a kind of improvement of the present utility model, the convex surface of first lens piece of described prismatic glasses 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; The thing side of described M font the 3rd lens piece is an aspheric surface with one side can be arranged as the side, can certainly two-sidedly be aspheric surface.
As another kind of improvement the of the present utility model, wherein said sampling image lens is provided with a preposition aperture, its aperture diaphragm (aperture stop) is arranged on the thing side convex surface (convex object-side surface) of first lens piece, has high resolving power and can effectively dwindle three lens type optical shooting lens of camera lens total length to constitute one.Can effectively promote the application of sampling image lens.
Description of drawings
Fig. 1 is the optical texture synoptic diagram of the utility model first embodiment;
Fig. 2 is the light path synoptic diagram of the utility model first embodiment;
Fig. 3 is lateral light fan (the transverse ray fan plot) figure of five different visual fields (actual image height 0,0.575,1.15,1.725,2.3mm) of the utility model first embodiment;
Fig. 4 is the curvature of field (field curvature) figure of the imaging of the utility model first embodiment;
Fig. 5 is distortion (distortion) figure of the imaging of the utility model first embodiment;
Modulation transfer function (the modulation transfer function) figure that Fig. 6 is produced when being corresponding 0 to the 160LP/mm spatial frequencys in five visual fields (actual image height 0,0.575,1.15,1.725,2.3mm) of the utility model first embodiment (spatial frequency);
Fig. 7 is relative exposure (relative illumination) figure that corresponding zero visual field, the full visual field of the utility model first embodiment is produced;
Fig. 8 is the optical texture synoptic diagram of the utility model second embodiment;
Fig. 9 is the light path synoptic diagram of the utility model two embodiment;
Figure 10 is the lateral light fan figure (transverse ray fan plot) of five different visual fields (actual image height 0,0.675,1.35,2.025,2.7mm) of the utility model second embodiment;
Figure 11 is the curvature of field (field curvature) figure of the imaging of the utility model second embodiment;
Figure 12 is distortion (distortion) figure of the imaging of the utility model second embodiment;
Modulation transfer function (the modulation transfer function) figure that Figure 13 is produced when being corresponding 0 to the 160LP/mm spatial frequencys in five visual fields (actual image height 0,0.675,1.35,2.025,2.7mm) of the utility model second embodiment (spatial frequency);
Figure 14 is relative exposure (relative illumination) figure that corresponding zero visual field, the full visual field of the utility model second embodiment is produced;
Figure 15 is the optical texture synoptic diagram of the utility model the 3rd embodiment;
Figure 16 is the light path synoptic diagram of the utility model three embodiment;
Figure 17 is the lateral light fan figure (transverse ray fan plot) of five different visual fields (actual image height 0,0.575,1.15,1.725,2.3mm) of the utility model the 3rd embodiment;
Figure 18 is the curvature of field (field curvature) figure of the imaging of the utility model the 3rd embodiment;
Figure 19 is distortion (distortion) figure of the imaging of the utility model the 3rd embodiment;
Modulation transfer function (the modulation transfer function) figure that Figure 20 is produced when being corresponding 0 to the 200LP/mm spatial frequencys in five visual fields (actual image height 0,0.575,1.15,1.725,2.3mm) of the utility model the 3rd embodiment (spatial frequency);
Figure 21 is relative exposure (relative illumination) figure that corresponding zero visual field, the full visual field of the utility model the 3rd embodiment is produced;
Figure 22 is the optical texture synoptic diagram of the utility model the 4th embodiment;
Figure 23 is the light path synoptic diagram of the utility model four embodiment;
Figure 24 is the lateral light fan figure (transverse ray fan plot) of five different visual fields (actual image height 0,0.575,1.15,1.725,2.3mm) of the utility model the 4th embodiment;
Figure 25 is the curvature of field (field curvature) figure of the imaging of the utility model the 4th embodiment;
Figure 26 is distortion (distortion) figure of the imaging of the utility model the 4th embodiment;
Modulation transfer function (the modulation transfer function) figure that Figure 27 is produced when being corresponding 0 to the 200LP/mm spatial frequencys in five visual fields (actual image height 0,0.575,1.15,1.725,2.3mm) of the utility model the 4th embodiment (spatial frequency);
Figure 28 is relative exposure (relative illumination) figure that corresponding zero visual field, the full visual field of the utility model the 4th embodiment is produced.
Description of reference numerals: L1-first lens piece; 11-thing side (convex surface); 12-is as side (concave surface); The 13-aperture diaphragm; L2-second lens piece; 21-is as side (convex surface); 22-thing side (concave surface); L3-the 3rd lens piece; The 4-infrared filter; The 5-image sensor; The 51-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 first embodiment, the utility model prismatic glasses formula optical shooting lens (optical imaging lens), by the thing side in regular turn (in orderfrom the object side) comprise: first lens piece of a positive diopter (a first lens element of positiverefractive power) L1 is located at thing side (on the object side), it is a meniscus non-spherical lens, and its convex surface 11 is in the thing side, and its concave surface 12 is in picture side (on the image side), and its convex surface 11 has at least one side to be aspheric surface with concave surface 12; The second lens piece L2 of one negative diopter (a second lens element of negativerefractive power) is located between the first lens piece L1 and the 3rd lens piece L3, it is a meniscus non-spherical lens, and its convex surface 21 is in the picture side, and its convex surface 21 has at least one side to be aspheric surface with concave surface 22; One negative dioptric the 3rd lens piece (a third lens element of negative refractivepower) is a M font non-spherical lens, and its thing side is the M font all with the picture side, and its median plane on optical axis can be convex surface or concave surface; One infrared filter (IR cut-off filter) 4; With an image sensor (image sensing chip) 5; And arrange formation in regular turn as shown in Figure 1 with same optical axis (optical axis) X; During capture, light is earlier through behind the first lens piece L1, the second lens piece L2 and the 3rd lens piece L3, passes through infrared filter 4 again and is imaged on the sensing face 51 of image sensor (image sensing chip) 5 as shown in Figure 2.The utility model sampling image lens is established a preposition aperture again, and its aperture diaphragm (aperturestop) 13 is provided in a side of on the thing side convex surface (convex object-side surface) 11 of the first lens piece L1 as shown in Figure 1, 2.
And the utility model three lens type optical shooting lens meet the following conditions (the following conditionsare satisfied):
0.4f≤d＜0.9f；
0.3＜|R1/R2|＜0.6；
2.8≤Fno＜3.6；
0.2＜br/f＜0.4；
0.5＜f1/f＜1; With
-4.0＜f3/f＜-1.1；
Wherein, f is the effective focal length of this sampling image lens (system), d is the distances of the first lens piece thing side to the, three lens as the side, R1 is the radius-of-curvature of the first lens piece thing side, R2 is the radius-of-curvature of first lens piece as the side, and Fno is the burnt number of this sampling image lens (system), and br is the back focal length of this sampling image lens (system), f1 is the effective focal length of first lens piece, and f3 is the effective focal length of the 3rd lens piece; Rely on said structure, effectively the school anaberration with reduce chief ray angle, 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.
Now enumerate several preferred embodiments, and be respectively described below:
＜the first embodiment 〉
Please refer to Fig. 1 to shown in Figure 7, it is respectively the structural representation of first embodiment, the light path synoptic diagram, five different visual fields (actual image heights 0,0.575,1.15,1.725,2.3mm) lateral light fan figure (transverseray fan plot), the curvature of field of imaging (field curvature) figure, the distortion of imaging (distortion) figure, five visual field (actual image heights 0,0.575,1.15,1.725,2.3mm) modulation transfer function (the modulation transfer function) figure that produced during corresponding 0 to 160LP/mm spatial frequency (spatial frequency), relative exposure (relative illumination) figure that corresponding zero visual field with full visual field is produced.
Show first embodiment is numbered (in order from the objectside) in regular turn by the thing side optical surface number # (surface number) 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 ( |
EVENA SPH aspheric surface | 1.045866 | 0.6254172 | APL5014DP |
| 2 ( |
EVENA SPH aspheric surface | 2.856472 | 0.333 | |
| 3 ( |
EVENA SPH aspheric surface | -1.211588 | 0.3 | PC-AD5503 |
| 4 ( |
EVENAS PH aspheric surface | -1.567001 | 0.71 | |
| 5 (the thing sides of L3) | The EVENASPH aspheric surface | 7.428193 | 0.635 | APL5014DP |
| 6 (the picture sides of L3) | The EVENASPH aspheric surface | 3.652651 | 0.3 | |
| The thing side of 7 infrared filters | STANDARD | ∞ | 0.3 | BK7 |
| The picture side of 8 infrared filters | STANDARD | ∞ | 0.6895 | |
| The sensing face of image sensor (IMG) | STANDARD | ∞ |
Every 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 |
| 0.2920592 | 0.087064049 | -0.53200801 | -2.0272798 | 3.1146592 | -0.20910606 | -2.7558402 |
| -10.3516 | -0.16571862 | 0.74653154 | -5.7031601 | 13.152124 | -3.1970224 | -37.065607 |
| 0 | -0.19424105 | 2.4541884 | -11.689832 | 31.523331 | -37.98107 | 0 |
| 0 | 0.25064416 | 0.3038517 | -0.51127647 | -1.7983047 | 1.1041925 | 0 |
| 0 | -0.1543527 | 0.072206238 | -0.017051835 | 0.00214664 | -5.6296258 |
0 |
| 0 | -0.14069475 | 0.050215116 | -0.017573297 | 0.00333273 | -0.00032903218 | 0 |
Again, Z=ch2/{1+[1-(1+K) c2h2] 1/2}+Ah4+Bh6+Ch8+Dh10+EH12+Fh14 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).
And the material of first, second and third lens piece L1 of first embodiment, L2, L3 all is a plastic material, as utilizing the plastic material of model APL5014DP, PC-AD5503 and APL5014DP respectively, and the material of infrared filter 4 is glass material such as model BK7 glass material, and its thickness is 0.3mm.
Lens system effective focal length f is 3.568mm again, and thing side convex surface 11 to the 3rd lens piece L3 of the first lens piece L1 as the side be 2.603mm apart from d, can satisfy condition: 0.4f≤d＜0.9f; Again as can be known according to table (): | R1/R2| is 0.366, can satisfy condition: 0.3＜| R1/R2|＜0.6; And Fno is 2.88, can satisfy condition: 2.8≤Fno＜3.6; And br/f is 0.36, can satisfy condition: 0.2＜br/f＜0.4; And f1/f is 0.756, can satisfy condition: 0.5＜f1/f＜1; And f3/f is-3.929, can satisfy condition :-4.0＜f3/f＜-1.1.
And it is extremely shown in Figure 7 by above-mentioned table (), table (two) and Fig. 1, the camera lens total length (totallength) of the first embodiment sampling image lens is 3.89292mm as can be known, provable thus sampling image lens of the present utility model is school anaberration and reduction chief ray angle effectively, make sampling image lens have high resolving power and can effectively dwindle lens length again, make to the utlity model has smaller size smaller and lower cost, thereby promote application of the present utility model.
＜the second embodiment 〉
Please refer to Fig. 8 to shown in Figure 14, it is respectively the structural representation of second embodiment, the light path synoptic diagram, five different visual fields (actual image heights 0,0.675,1.35,2.025,2.7mm) lateral light fan figure (transverseray fan plot), the curvature of field of imaging (field curvature) figure, the distortion of imaging (distortion) figure, five visual field (actual image heights 0,0.675,1.35,2.025,2.7mm) modulation transfer function (the modulation transfer function) figure that produced during corresponding 0 to 160LP/mm spatial frequency (spatial frequency), relative exposure (relative illumination) figure that corresponding zero visual field with full visual field is produced.
Show second embodiment is numbered (in order from the objectside) in regular turn by the thing side optical surface number # (surface number) 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 | 0.9521654 | 0.7 | APL5014DP |
| 2 ( |
The EVENASPH aspheric surface | 1.868359 | 0.46 | |
| 3 ( |
The EVENASPH aspheric surface | -0.8740775 | 0.33 | OKP4 |
| 4 ( |
The EVENASPH aspheric surface | -1.178223 | 0.48 | |
| 5 (the thing sides of L3) | The EVENASPH aspheric surface | -11.23862 | 0.96 | APL5014DP |
| 6 (the picture sides of L3) | The EVENASPH aspheric surface | 18.92478 | 0.47 | |
| The thing side of 7 infrared filters | S TANDARD | ∞ | 0.145 | BK7 |
| The picture side of 8 infrared filters | STANDARD | ∞ | 0.6852577 | |
| The sensing face of image sensor (IMG) | STANDARD | ∞ |
Each aspheric every coefficient (Coeff) is shown in following tabulation (two):
Table (two)
| Conic K | Coeffon A | Coeffon B | Coeffon C | Coeffon D | Coeffon E |
| 1.2388473 | 0.10756979 | -0.25703696 | 2.5485253 | -2.9346596 | 2.7326332 |
| 8.764503 | 0.068892289 | 0.96971112 | -6.1227955 | 17.56916 | -20.81957 |
| -0.3800384 | 0.17443527 | 1.1430828 | -1.3541767 | 4.1598877 | -12.997629 |
| -0.512312 | 0.2573969 | 0.40575552 | -0.65066411 | 0.21857035 | 0.044341757 |
| 0 | -0.047939702 | -0.011027204 | 0.001404473 | -9.55247e-005 | 0 |
| -8.75739e+016 | -0.035433299 | 0.0042659581 | 0.00037998373 | -0.000121579 | 0 |
Again, Z=ch2/{1+[1-(1+K) c2h2] 1/2}+Ah4+Bh6+Ch8+Dh10+Eh12 is its aspheric surface equation (A spherical Surface Formula), wherein, c is a curvature, h is the eyeglass height, and 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).
And the material of first, second and third lens piece L1 of second embodiment, L2, L3 can be utilized the plastic material of model APL5014DP, OKP4 and APL5014DP respectively, and the material of infrared filter 4 can be utilized the glass material of model BK7, and its thickness is 0.145mm.
Lens system effective focal length f is 4.45408mm again, and thing side convex surface 11 to the 3rd lens piece L3 of the first lens piece L1 as the side be 2.93mm apart from d, can satisfy condition: 0.4f≤d＜0.9f; Again as can be known according to table (): | R1/R2| is 0.51, can satisfy condition: 0.3＜| R1/R2|＜0.6; And Fno is 3.5, can satisfy condition: 2.8≤Fno＜3.6; And br/f is 0.295, can satisfy condition: 0.2＜br/f＜0.4; And f1/f is 0.634, can satisfy condition: 0.5＜f1/f＜1; And f3/f is-2.888, can satisfy condition :-4.0＜f3/f＜-1.1.
And it is extremely shown in Figure 14 by above-mentioned table (), table (two) and Fig. 8, the camera lens total length (totallength) of the second embodiment sampling image lens is 4.23026mm as can be known, provable sampling image lens of the present utility model like this is school anaberration and reduction chief ray angle effectively, make sampling image lens have high resolving power and can effectively dwindle lens length, make to the utlity model has smaller size smaller and lower cost, and promote application of the present utility model.
＜the three embodiment 〉
Please refer to Figure 15 to shown in Figure 21, it is respectively the structural representation of the 3rd embodiment, the light path synoptic diagram, five different visual fields (actual image heights 0,0.575,1.15,1.725,2.3mm) lateral light fan figure (transverseray fan plot), the curvature of field of imaging (field curvature) figure, the distortion of imaging (distortion) figure, five visual field (actual image heights 0,0.575,1.15,1.725,2.3mm) modulation transfer function (the modulation transfer function) figure that produced during corresponding 0 to 200LP/mm spatial frequency (spatial frequency), relative exposure (relative illumination) figure that corresponding zero visual field with full visual field is produced.
Show the 3rd embodiment is numbered (in order from the objectside) in regular turn by the thing side optical surface number # (surface number) 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 | 1.114541 | 0.66 | L-BAL42 |
| ( |
The EVENASPH aspheric surface | 2.935603 | 0.333 | |
| ( |
The EVENASPH aspheric surface | -1.211588 | 0.3 | PC-AD5503 |
| 4 ( |
EVENAS PH aspheric surface | -1.567001 | 0.71 | |
| 5 (the thing sides of L3) | EVENAS PH aspheric surface | 7.428193 | 0.635 | APL5014 DP |
| 6 (the picture sides of L3) | EVENAS PH aspheric surface | 3.652651 | 0.3 | |
| The thing side of 7 infrared filters | STANDARD | ∞ | 0.3 | BK7 |
| The picture side of 8 infrared filters | STANDARD | ∞ | 0.663 | |
| The sensing face of image sensor (IMG) | STANDARD | ∞ |
Each aspheric every coefficient (Coeff) is shown in following tabulation (two):
Table (two)
Again, Z=ch2/{1+[1-(1+K) c2h2] 1/2}+Ah4+Bh6+Ch8+Dh10+Eh12 is its aspheric surface equation (A spherical Surface Formula), wherein, c is a curvature, h is the eyeglass height, and 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).
And the material of the first lens piece L1 of the 3rd embodiment can be utilized the moulded glass material of model L-BAL42, and the material of second and third lens piece L2, L3 can be utilized the plastic material of model PC-AD5503 and APL5014DP respectively, and the material of infrared filter 4 is the glass material of model BK7, and its thickness is 0.3mm.
| Conic k | Coeffon A | Coeffon B | Coeffon C | Coeffon D | Coeffon E |
| 0 | -1.02671936 | -0.068884 | 0.24955338 | -0.23824146 | 0.011541093 |
| 0 | 0.039706576 | 1.62437299 | 2.8582053 | -5.1534801 | 0 |
| 0 | -0.19424105 | 2.4541884 | 11.689832 | 31.523331 | -37.98107 |
| 0 | 0.12064416 | 0.3038517 | 0.91127647 | -1.7983047 | 1.1041925 |
| 0 | 0.4543327 | 0.072206238 | -0.017051835 | 0.00214664 | -5.6296258e-005 |
| 0 | -0.14069475 | 0.150215116 | -0.017573297 | 0.00333273 | -0.00032903218 |
Lens system effective focal length f is 3.60562mm again, and thing side convex surface 11 to the 3rd lens piece L3 of the first lens piece L1 as the side be 2.638mm apart from d, can satisfy condition: 0.4f≤d＜0.9f; Again as can be known according to table (): | R1/R2| is 0.38, can satisfy condition: 0.3＜| R1/R2|＜0.6; And Fno is 2.88, can satisfy condition: 2.8≤Fno＜3.6; And br/f is 0.349, can satisfy condition: 0.2＜br/f＜0.4; And f1/f is 0.755, can satisfy condition: 0.5＜f1/f＜1, and f3/f is-3.872, can satisfy condition :-4.0＜f3/f＜-1.1.
And it is extremely shown in Figure 21 by above-mentioned table (), table (two) and Figure 15, the camera lens total length (totallength) of the utility model sampling image lens is 3.901mm as can be known, and provable sampling image lens of the present utility model like this is school anaberration and reduction chief ray angle effectively, make sampling image lens have high resolving power and can effectively dwindle lens length, make to the utlity model has smaller size smaller and lower cost, and promote application of the present utility model.
＜the four embodiment 〉
Please refer to Figure 22 to shown in Figure 28, it is respectively the structural representation of the 4th embodiment, the light path synoptic diagram, five different visual fields (actual image heights 0,0.575,1.15,1.725,2.3mm) lateral light fan figure (transverseray fan plot), the curvature of field of imaging (field curvature) figure, the distortion of imaging (distortion) figure, five visual field (actual image heights 0,0.575,1.15,1.725,2.3mm) modulation transfer function (the modulation transfer function) figure that produced during corresponding 0 to 200LP/mm spatial frequency (spatial frequency), relative exposure (relative illumination) figure that corresponding zero visual field with full visual field is produced.
Show the 4th embodiment is numbered (in order from the objectside) in regular turn by the thing side optical surface number # (surface number) 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 | 1.131739 | 0.659822 | L-BAL42 |
| ( |
The EVENASPH aspheric surface | 2.980781 | 0.362801 | |
| 3 ( |
The EVENASPH aspheric surface | -1.147414 | 0.312704 | PC-AD5503 |
| 4 ( |
The EVENASPH aspheric surface | -1.402019 | 0.780297 | |
| 5 (the thing sides of L3) | The EVENASPH aspheric surface | 9.344721 | 0.670206 | E48R |
| 6 (the picture sides of L3) | The EVENASPH aspheric surface | 3.242521 | 0.295425 | |
| The thing side of 7 infrared filters | STANDARD | ∞ | 0.3 | BK7 |
| The picture side of 8 infrared filters | STANDARD | ∞ | 0.492000 | |
| The sensing face of image sensor (IMG) | STANDARD | ∞ |
Each aspheric every coefficient (Coeff) is shown in following tabulation (two):
Table (two)
| Conic K | Coeffon A | Coeffon B | Coeffon | Coeffon D | Coeffon | Coeffon | CoeffonG F | |
| 0 | 0014349 | 0.072306 | 1.604128 | 2.150179 | -3165406 | 1.326687 | 0 | |
| 0 | 0025049 | -0.177248 | 0.659086 | -1.470068 | -2261540 | -0.430519 | 0 | |
| 0 | -0.325856 | 3141126 | -17244902 | 56935162 | 101.980482 | 81.543450 | -46.417413 | |
| 0 | 0.067450 | -0.270228 | 0.874534 | 1.292196 | 0.995264 | -0.873310 | 0.557583 | |
| -1088.132364 | -0.155882 | 0088906 | -0029565 | 0001290 | 0.001439 | 0.000733 | -0000313 | |
| -20.667084 | -0.116499 | 0.043999 | -0.016342 | 0002851 | -0000250 | -0.000051 | 0.000014 |
Again, 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, and h is the eyeglass height, and K is circular cone coefficient (Conic Constant), and A is the asphericity coefficient (4 of quadravalence
ThOrder A spherical Coefficient), 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 sphericalCoefficient), E is the asphericity coefficient (12 of ten second orders
ThOrder A spherical Coefficient), F is the asphericity coefficient (14 of ten quadravalences
ThOrderAspherical Coefficient), G is the asphericity coefficient (14 on 16 rank
ThOrder A spherical Coefficient).
And the material of the first lens piece L1 of the 4th embodiment can be utilized the moulded glass material of model L-BAL42, and the material of second and third lens piece L2, L3 can be utilized the plastic material of model PC-AD5503 and E48R respectively, and the material of infrared filter 4 can be utilized the glass material of model BK7, and its thickness is 0.3mm.
Lens system effective focal length f is 3.56392mm again, and thing side convex surface 11 to the 3rd lens piece L3 of the first lens piece L1 as the side be 2.78583mm apart from d, can satisfy condition: 0.4f≤d＜0.9f; Again as can be known according to table (): | R1/R2| is 0.379679, can satisfy condition: 0.3＜| R1/R2|＜0.6; And Fno is 2.8, can satisfy condition: 2.8≤Fno＜3.6; And br is 1.087425mm, and br/f is 0.305120, can satisfy condition: 0.2＜br/f＜0.4; And f1 is 2.745667mm, and f1/f is 0.770405, can satisfy condition: 0.5＜f1/f＜1, and f3 is-9.739370mm, f3/f is-2.732769, can satisfy condition :-4.0＜f3/f＜-1.1.
And it is extremely shown in Figure 28 by above-mentioned table (), table (two) and Figure 22, the camera lens total length (totallength) of the utility model sampling image lens is 3.873mm as can be known, and provable sampling image lens of the present utility model like this is school anaberration and reduction chief ray angle effectively, make sampling image lens have high resolving power and can effectively dwindle lens length, make to the utlity model has smaller size smaller and lower cost, and promote application of the present utility model.
More than shown in only be this novel preferred embodiment, novel for this only is illustrative, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in these spirit and scope that novel claim limited, revise, even the equivalence change, but all will fall in this novel protection domain.
Claims (11)
1. prismatic glasses 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 be a meniscus non-spherical lens, and its convex surface is in the thing side;
One negative dioptric second lens piece is a meniscus non-spherical lens, and its convex surface is in the picture side;
One negative dioptric the 3rd lens piece is a M font non-spherical lens, and its thing side is the M font all with the picture side, and its median plane at optical axis can be convex surface or concave surface;
One infrared filter; With
One image sensor;
Wherein, meet the following conditions:
0.4f≤d＜0.9f；
0.3＜|R1/R2|＜0.6；
2.8≤Fno＜3.6；
0.2＜br/f＜0.4；
0.5＜f1/f＜1；
-4.0＜f3/f＜-1.1；
Wherein, f is the effective focal length of this sampling image lens system, d is the distances of the first lens piece thing side to the, three lens pieces as the side, R1 is the radius-of-curvature of the first lens piece thing side, R2 is the radius-of-curvature of first lens piece as the side, and Fno is the burnt number of this sampling image lens system, and br is the back focal length of this sampling image lens system, f1 is the effective focal length of first lens piece, with f3 be the effective focal length of the 3rd lens piece.
2. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: the convex surface of described meniscus first lens piece and concave surface have at least one side to be aspheric surface.
3. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: the convex surface of described meniscus second lens piece and concave surface have at least one side to be aspheric surface.
4. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: the thing side of described M font the 3rd lens piece is aspheric surface with have one side at least as the side.
5. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: described sampling image lens is that a preposition aperture is set.
6. according to the described three lens type optical shooting lens of claim 5, it 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.
7. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: described first, second and third lens piece is to utilize plastic material to make respectively, and described infrared filter is to utilize glass material to make and its thickness is 0.3mm.
8. according to the described prismatic glasses formula of claim 7 optical shooting lens, it is characterized in that: described first, second and third lens piece is to utilize the plastic material of model APL5014DP, PC-AD5503 and APL5014DP to make respectively, and infrared filter is to utilize the glass material of model BK7 to make.
9. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: described first, second and third lens piece is to utilize plastic material to make respectively, and infrared filter is to utilize glass material to make and its thickness is 0.145mm.
10. according to the described prismatic glasses formula of claim 9 optical shooting lens, it is characterized in that: described first, second and third lens piece is to utilize the plastic material of model APL5014DP, OKP4 and APL5014DP to make respectively, and infrared filter is to utilize the glass material of model BK7 to make.
11. according to the described prismatic glasses formula of claim 1 optical shooting lens, it is characterized in that: described first lens piece is to utilize the moulded glass material to make, and second and third lens piece is to utilize plastic material to make respectively, and infrared filter is to utilize glass material to make and its thickness is 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620175613XU CN201054035Y (en) | 2006-12-26 | 2006-12-26 | Three lens type optical imaging lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620175613XU CN201054035Y (en) | 2006-12-26 | 2006-12-26 | Three lens type optical imaging lens |
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| CN201054035Y true CN201054035Y (en) | 2008-04-30 |
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| CNU200620175613XU Expired - Fee Related CN201054035Y (en) | 2006-12-26 | 2006-12-26 | Three lens type optical imaging lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520542B (en) * | 2008-02-27 | 2011-02-16 | 一品光学工业股份有限公司 | Optical shooting lens |
| CN102193168A (en) * | 2010-03-04 | 2011-09-21 | 大立光电股份有限公司 | Photographic lens system |
| CN105093492A (en) * | 2014-05-22 | 2015-11-25 | 宁波舜宇光电信息有限公司 | Shooting optical lens assembly and iris shooting module group |
| CN106483624A (en) * | 2015-08-28 | 2017-03-08 | 今国光学工业股份有限公司 | Three-chip type camera lens module |
-
2006
- 2006-12-26 CN CNU200620175613XU patent/CN201054035Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520542B (en) * | 2008-02-27 | 2011-02-16 | 一品光学工业股份有限公司 | Optical shooting lens |
| CN102193168A (en) * | 2010-03-04 | 2011-09-21 | 大立光电股份有限公司 | Photographic lens system |
| CN102193168B (en) * | 2010-03-04 | 2012-08-29 | 大立光电股份有限公司 | Photographic lens system |
| CN105093492A (en) * | 2014-05-22 | 2015-11-25 | 宁波舜宇光电信息有限公司 | Shooting optical lens assembly and iris shooting module group |
| CN105093492B (en) * | 2014-05-22 | 2018-06-26 | 宁波舜宇光电信息有限公司 | A kind of camera optical microscope group and iris camera module |
| US11361591B2 (en) | 2014-05-22 | 2022-06-14 | Ningbo Sunny Opotech Co., Ltd. | Iris recognition device, manufacturing method therefor and application thereof |
| US11668912B2 (en) | 2014-05-22 | 2023-06-06 | Ningbo Sunny Opotech Co., Ltd. | Iris recognition device, manufacturing method therefor and application thereof |
| CN106483624A (en) * | 2015-08-28 | 2017-03-08 | 今国光学工业股份有限公司 | Three-chip type camera lens module |
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