CN104391368A - Three-plate type camera lens - Google Patents
Three-plate type camera lens Download PDFInfo
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- CN104391368A CN104391368A CN201410554378.6A CN201410554378A CN104391368A CN 104391368 A CN104391368 A CN 104391368A CN 201410554378 A CN201410554378 A CN 201410554378A CN 104391368 A CN104391368 A CN 104391368A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
Disclosed in the invention is a three-plate type camera lens comprising a first lens with the positive refraction power, a second lens with the negative refraction power, and a third lens with the positive refraction power successively from an object side to an image side. The camera lens meets the following relations: tan (HFOV) > 0.74, TTL/ImgH < 1.7, 0.6 < f1/f <0.8; and -1.3 < f1/f2 < -0.8, wherein the HFOV is the half of the field angle of the camera lens, the TTL expresses the total length of the camera lens, the Imgh is the half of the diameter of the effective pixel zone of the camera lens at an imaging plane, the f1 expresses the focal length of the first lens, the f expresses the focal length of the second lens, and the f expresses the effective focal length of the camera lens. On the condition that the conditional expressions are met, the camera lens that is provided by the better embodiment of the invention has characteristics of large field angle or wide angle, miniaturization, and high imaging quality and the like.
Description
Technical field
The present invention relates to pick-up lens, especially relate to a kind of pick-up lens of three-chip type.
Background technology
Along with charge coupled device (charge-coupled device, and CMOS (Complementary Metal Oxide Semiconductor) (complementary metal-oxide semiconductor CCD), CMOS) performance of imageing sensor improves and size reduction, and corresponding pick-up lens also needs the requirement meeting high image quality and miniaturization.
Existing three-chip type pick-up lens has developed comparatively ripe, but the pick-up lens of three-chip type still exists more restriction.Such as, miniaturization causes field angle less, although and field angle can be improved by the diopter of eyeglass changing camera lens, but will cause distortion deterioration, thus cause image quality to decline.
Summary of the invention
The present invention is intended at least to solve one of technical matters existed in prior art.For this reason, the present invention needs to provide a kind of pick-up lens.
Comprise first lens with positive refracting power, second lens with negative refracting power according to the pick-up lens of better embodiment of the present invention successively by thing side to image side and there are the 3rd lens of positive refracting power.Described pick-up lens meets relational expression: tan (HFOV) > 0.74; TTL/ImgH < 1.7; 0.6 < f1/f < 0.8 and-1.3 < f1/f2 <-0.8.Wherein, HFOV is the half of the field angle of described pick-up lens, TTL is the camera lens overall length of described pick-up lens, ImgH is the half of described pick-up lens effective pixel area diameter on imaging surface, f1 is the focal length of described first lens, f2 is the focal length of described second lens, and f is the effective focal length of described pick-up lens.
Meeting above-mentioned conditional makes the pick-up lens of better embodiment of the present invention have the comparatively characteristic such as Large visual angle angle (wide-angle), miniaturization and high image quality.
In some embodiments, described pick-up lens also satisfies condition formula: | (R1+R2)/(R1-R2) | < 0.4 and-1.5 < R2/f <-0.5.Wherein, R1, R2 are respectively the thing side of described first lens and the radius-of-curvature in face, image side.
In some embodiments, described pick-up lens also satisfies condition formula :-8 < (R5+R6)/(R5-R6) <-4 and 0.8 < f3/f < 1.6.Wherein, R5, R6 are respectively the described thing side of the 3rd lens and the radius-of-curvature in face, image side, and f3 is the focal length of described 3rd lens.
In some embodiments, described pick-up lens also satisfies condition formula: 1.4 < CT1/CT2 < 1.9 and 1.8 < CT3/CT2 < 2.0.Wherein, CT1 is the center thickness of described first lens, and CT2 is the center thickness of described second lens, and CT3 is the center thickness of described 3rd lens.
In some embodiments, described pick-up lens also satisfies condition formula: 0.4 < (CT1+CT2+CT3)/TTL < 0.6.
In some embodiments, the thing side of described first eyeglass is convex surface, and face, image side is convex surface.The thing side of described second eyeglass is concave surface, and face, image side is convex surface.The thing side of described 3rd eyeglass is convex surface, and face, image side is concave surface, and thing side and face, image side all exist a point of inflexion.
In some embodiments, described pick-up lens also comprises the diaphragm be arranged between object and the second lens.
In some embodiments, described first eyeglass, described second eyeglass and described 3rd eyeglass are all made of plastics.
In some embodiments, there is a point of inflexion in the face, image side of described second eyeglass.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic diagram of pick-up lens embodiment 1 provided by the invention;
Fig. 2 be embodiment 1 axle on chromaticity difference diagram (mm);
Fig. 3 is the astigmatism figure (mm) of embodiment 1;
Fig. 4 is the distortion figure (%) of embodiment 1;
Fig. 5 is the ratio chromatism, figure (μm) of embodiment 1;
Fig. 6 is the schematic diagram of pick-up lens embodiment 2 provided by the invention;
Fig. 7 be embodiment 2 axle on chromaticity difference diagram (mm);
Fig. 8 is the astigmatism figure (mm) of embodiment 2;
Fig. 9 is the distortion figure (%) of embodiment 2;
Figure 10 is the ratio chromatism, figure (μm) of embodiment 2;
Figure 11 is the schematic diagram of pick-up lens embodiment 3 provided by the invention;
Figure 12 be embodiment 3 axle on chromaticity difference diagram (mm);
Figure 13 is the astigmatism figure (mm) of embodiment 3;
Figure 14 is the distortion figure (%) of embodiment 3;
Figure 15 is the ratio chromatism, figure (μm) of embodiment 3;
Figure 16 is the schematic diagram of pick-up lens embodiment 4 provided by the invention;
Figure 17 be embodiment 4 axle on chromaticity difference diagram (mm);
Figure 18 is the astigmatism figure (mm) of embodiment 4;
Figure 19 is the distortion figure (%) of embodiment 4;
Figure 20 is the ratio chromatism, figure (μm) of embodiment 4;
Figure 21 is the schematic diagram of pick-up lens embodiment 5 provided by the invention;
Figure 22 be embodiment 5 axle on chromaticity difference diagram (mm);
Figure 23 is the astigmatism figure (mm) of embodiment 5;
Figure 24 is the distortion figure (%) of embodiment 5;
Figure 25 is the ratio chromatism, figure (μm) of embodiment 5;
Figure 26 is the schematic diagram of pick-up lens embodiment 6 provided by the invention;
Figure 27 be embodiment 6 axle on chromaticity difference diagram (mm);
Figure 28 is the astigmatism figure (mm) of embodiment 6;
Figure 29 is the distortion figure (%) of embodiment 6;
Figure 30 is the ratio chromatism, figure (μm) of embodiment 6;
Figure 31 is the schematic diagram of pick-up lens embodiment 7 provided by the invention;
Figure 32 be embodiment 7 axle on chromaticity difference diagram (mm);
Figure 33 is the astigmatism figure (mm) of embodiment 7;
Figure 34 is the distortion figure (%) of embodiment 7; And
Figure 35 is the ratio chromatism, figure (μm) of embodiment 7.
Embodiment
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as that instruction or hint relative importance or hidden conjunction indicate the quantity of indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or hidden conjunction comprise one or more described features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrically connected or can intercom mutually; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or reference letter, this repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the application of other techniques and/or the use of other materials.
Refer to Fig. 1, the pick-up lens of better embodiment of the present invention by thing side to image side comprise successively there is positive refracting power the first lens E1, there is the second lens E2 of negative refracting power and there is the 3rd lens E3 of positive refracting power.Pick-up lens meets relational expression:
tan(HFOV)＞0.74；
TTL/ImgH＜1.7；
0.6 < f1/f < 0.8; And
-1.3＜f1/f2＜-0.8。Wherein, HFOV is the half of the field angle of pick-up lens, and TTL is the camera lens overall length of pick-up lens, ImgH is the half of pick-up lens effective pixel area diameter on imaging surface, f1 is the focal length of the first lens E1, and f2 is the focal length of the second lens E2, and f is the effective focal length of pick-up lens.
Meeting above-mentioned conditional makes the pick-up lens of better embodiment of the present invention have the comparatively characteristic such as Large visual angle angle (wide-angle), miniaturization and high image quality.Concrete, relational expression tan (HFOV) > 0.74 can ensure that pick-up lens has larger field angle, and relational expression TTL/ImgH < 1.7 is conducive to the miniaturization of pick-up lens.First lens E1 provides enough refracting powers for pick-up lens, contributes to the camera lens overall length shortening pick-up lens while ensureing image quality.Second lens E2 and the first lens E1 carries out the distribution of suitable refracting power, is conducive to the resolution improving pick-up lens.
In some embodiments, pick-up lens also satisfies condition formula:
| (R1+R2)/(R1-R2) | < 0.4; And
-1.5＜R2/f＜-0.5。
Wherein, R1, R2 are respectively the thing side of the first lens E1 and the radius-of-curvature in face, image side.
The shape of restriction first lens E1 like this is conducive to the field angle increasing pick-up lens.
In some embodiments, pick-up lens also satisfies condition formula:
-8 < (R5+R6)/(R5-R6) <-4; And
0.8＜f3/f＜1.6。
Wherein, R5, R6 are respectively the thing side of the 3rd lens E3 and the radius-of-curvature in face, image side, and f3 is the focal length of the 3rd lens E3.
The shape facility of restriction like this 3rd lens E3 and refracting power, effectively can eliminate the distortion of pick-up lens, promotes image quality.
In some embodiments, pick-up lens also satisfies condition formula:
1.4 < CT1/CT2 < 1.9; And
1.8＜CT3/CT2＜2.0。
Wherein, CT1 is the center thickness of the first lens E1, and CT2 is the center thickness of the second lens E2, and CT3 is the center thickness of the 3rd lens E3.
The center so arranging the first lens E1, the second lens E2 and the 3rd lens E3 is conducive to the miniaturization of pick-up lens and production, the carrying out smoothly of packaging technology.
In some embodiments, pick-up lens also satisfies condition formula: 0.4 < (CT1+CT2+CT3)/TTL < 0.6.
Setting like this, be conducive to above require to be beneficial to reduce the camera lens overall length of pick-up lens, promote miniaturization.
In some embodiments, the thing side of the first lens E1 is convex surface, and face, image side is convex surface.The thing side of the second lens E2E2 is concave surface, and face, image side is convex surface.The thing side of the 3rd lens E3 is convex surface, and face, image side is concave surface, and thing side and face, image side all exist a point of inflexion.
In some embodiments, pick-up lens also comprises the diaphragm be arranged between object and the second lens E2.
In some embodiments, the first lens E1, the second lens E2E2 and the 3rd lens E3 are all made of plastics.
In some embodiments, there is a point of inflexion in the face, image side of the second lens E2E2.
Aspheric shape is determined by following formula:
Wherein, h is that in aspheric surface, arbitrary point is to the height of optical axis, and c is vertex curvature, and k is conic constants, and Ai is the correction factor on aspheric surface i-th-th rank.
Embodiment 1
Refer to Fig. 1, in the pick-up lens of embodiment 1, diaphragm is arranged between object and the first lens E1.Pick-up lens comprises diaphragm face S1 by thing side to image side, the thing side S4 of the thing side S2 of the first lens E1 and face, image side S3, the second lens E2 and to side S5, the thing side S6 of the 3rd lens E3 and face, image side S7.Light through pick-up lens images in imaging surface S10 by optical filter E4.Optical filter E4 comprises thing side S8 and face, image side S9.
Pick-up lens meets parameter below:
TTL＝2.83；f1＝1.39；f2＝-1.6；f3＝2.79；f＝1.98；
tan(HFOV)＝0.97；TTL/ImgH＝1.45；
(R1+R2)/(R1-R2)＝0.24；R2/f＝-0.58；
f1/f＝0.7；f1/f2＝-0.87；
(R5+R6)/(R5-R6)＝-7.11；f3/f＝1.41；
CT1/CT2＝1.74；CT3/CT2＝1.83；
(CT1+CT2+CT3)/TTL＝0.54；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 1-2:
Table 1
Table 2
Fig. 2 be embodiment 1 axle on chromaticity difference diagram (mm), the distortion figure (%) of Fig. 3 to be the astigmatism figure (mm) of embodiment 1, Fig. 4 be embodiment 1 and Fig. 5 is the ratio chromatism, figure (μm) of embodiment 1.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
Embodiment 2
Refer to Fig. 6, the pick-up lens of embodiment 2 is substantially identical with the pick-up lens of embodiment 1, but meets following parameter:
TTL＝2.66；f1＝1.37；f2＝-1.67；f3＝2.65；f＝1.83；
tan(HFOV)＝1.04；TTL/ImgH＝1.37；
(R1+R2)/(R1-R2)＝0.11；R2/f＝-0.69；
f1/f＝0.74；f1/f2＝-0.82；
(R5+R6)/(R5-R6)＝-6.68；f3/f＝1.45；
CT1/CT2＝1.44；CT3/CT2＝1.82；
(CT1+CT2+CT3)/TTL＝0.54；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 3-4:
Table 3
Table 4
Fig. 7 be embodiment 2 axle on chromaticity difference diagram (mm), the distortion figure (%) of Fig. 8 to be the astigmatism figure (mm) of embodiment 2, Fig. 9 be embodiment 2 and Figure 10 is the ratio chromatism, figure (μm) of embodiment 2.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
Embodiment 3
Refer to Figure 11, the pick-up lens of embodiment 3 is substantially identical with the pick-up lens of embodiment 1, but meets following parameter:
The pick-up lens correlation parameter of the present embodiment is as follows:
TTL＝2.94；f1＝1.47；f2＝-1.52；f3＝2.47；f＝2.10；
tan(HFOV)＝0.89；TTL/ImgH＝1.52；
(R1+R2)/(R1-R2)＝0.17；R2/f＝-0.62；
f1/f＝0.7；f1/f2＝-0.96；
(R5+R6)/(R5-R6)＝-5.04；f3/f＝1.17；
CT1/CT2＝1.51；CT3/CT2＝1.87；
(CT1+CT2+CT3)/TTL＝0.47；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 5-6:
Table 5
Table 6
Figure 12 be embodiment 3 axle on chromaticity difference diagram (mm), the distortion figure (%) of Figure 13 to be the astigmatism figure (mm) of embodiment 3, Figure 14 be embodiment 3 and Figure 15 is the ratio chromatism, figure (μm) of embodiment 3.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
Embodiment 4
Refer to Figure 16, the pick-up lens of embodiment 4 is substantially identical with the pick-up lens of embodiment 1, but meets following parameter:
The pick-up lens correlation parameter of the present embodiment is as follows:
TTL＝3.02；f1＝1.54；f2＝-1.6；f3＝2.71；f＝2.23；
tan(HFOV)＝0.84；TTL/ImgH＝1.56；
(R1+R2)/(R1-R2)＝-0.03；R2/f＝-0.73；
f1/f＝0.69；f1/f2＝-0.96；
(R5+R6)/(R5-R6)＝-5.82；f3/f＝1.22；
CT1/CT2＝1.85；CT3/CT2＝1.898；
(CT1+CT2+CT3)/TTL＝0.48；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 7-8:
Table 7
Table 8
Figure 17 be embodiment 4 axle on chromaticity difference diagram (mm), the distortion figure (%) of Figure 18 to be the astigmatism figure (mm) of embodiment 4, Figure 19 be embodiment 4 and Figure 20 is the ratio chromatism, figure (μm) of embodiment 4.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
Embodiment 5
Refer to Figure 21, the pick-up lens of embodiment 5 is substantially identical with the pick-up lens of embodiment 1, but meets following parameter;
The pick-up lens correlation parameter of the present embodiment is as follows:
TTL＝3.14；f1＝1.73；f2＝-1.59；f3＝2.35；f＝2.38；
tan(HFOV)＝0.8；TTL/ImgH＝1.62；
(R1+R2)/(R1-R2)＝-0.25；R2/f＝-1.02；
f1/f＝0.73；f1/f2＝-1.09；
(R5+R6)/(R5-R6)＝-4.56；f3/f＝0.99；
CT1/CT2＝1.5；CT3/CT2＝1.805；
(CT1+CT2+CT3)/TTL＝0.45；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 9-10:
Table 9
Table 10
Figure 22 be embodiment 5 axle on chromaticity difference diagram (mm), the distortion figure (%) of Figure 23 to be the astigmatism figure (mm) of embodiment 5, Figure 24 be embodiment 5 and Figure 25 is the ratio chromatism, figure (μm) of embodiment 5.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
Embodiment 6
Refer to Figure 26, the pick-up lens of embodiment 6 is substantially identical with the pick-up lens of embodiment 1, but meets following parameter:
The pick-up lens correlation parameter of the present embodiment is as follows:
TTL＝3.26；f1＝1.92；f2＝-1.61；f3＝2.20；f＝2.55；
tan(HFOV)＝0.75；TTL/ImgH＝1.68；
(R1+R2)/(R1-R2)＝-0.39；R2/f＝-1.29；
f1/f＝0.75；f1/f2＝-1.2；
(R5+R6)/(R5-R6)＝-4.02；f3/f＝0.86；
CT1/CT2＝1.73；CT3/CT2＝1.82；
(CT1+CT2+CT3)/TTL＝0.41；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 11-12:
Table 11
Table 12
Figure 27 be embodiment 6 axle on chromaticity difference diagram (mm), the distortion figure (%) of Figure 28 to be the astigmatism figure (mm) of embodiment 6, Figure 29 be embodiment 6 and Figure 30 is the ratio chromatism, figure (μm) of embodiment 6.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
Embodiment 7
Refer to Figure 31, the pick-up lens of embodiment 7 is substantially identical with the pick-up lens of embodiment 1, but diaphragm is arranged between the first lens E1 and the second lens E2, therefore pick-up lens comprises the thing side S1 of the first lens E1 and face, image side S2 successively and diaphragm face is S3 from thing side.Pick-up lens meets following parameter:
The pick-up lens correlation parameter of the present embodiment is as follows:
TTL＝2.89；f1＝1.53；f2＝-1.66；f3＝2.55；f＝2.07；
tan(HFOV)＝0.742；TTL/ImgH＝1.49；
(R1+R2)/(R1-R2)＝0.06；R2/f＝-0.71；
f1/f＝0.74；f1/f2＝-0.92；
(R5+R6)/(R5-R6)＝-5.42；f3/f＝1.23；
CT1/CT2＝1.74；CT3/CT2＝1.89；
(CT1+CT2+CT3)/TTL＝0.50；
Stop value: 2.4 and ImgH:1.94.
Pick-up lens also meets table 13-14:
Table 13
Table 14
Figure 31 be embodiment 7 axle on chromaticity difference diagram (mm), the distortion figure (%) of Figure 32 to be the astigmatism figure (mm) of embodiment 7, Figure 33 be embodiment 7 and Figure 35 is the ratio chromatism, figure (μm) of embodiment 7.Can find out, the aberration of pick-up lens is still controlled in rational scope when meeting large wide-angle and miniaturization, thus ensures image quality.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with described embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the present invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (9)
1. a pick-up lens, is characterized in that, is comprised successively to image side by thing side:
There are the first lens of positive refracting power;
There are the second lens of negative refracting power; And
There are the 3rd lens of positive refracting power;
Described pick-up lens meets relational expression:
tan(HFOV)＞0.74；
TTL/ImgH＜1.7；
0.6 < f1/f < 0.8; And
-1.3＜f1/f2＜-0.8；
Wherein, HFOV is the half of the field angle of described pick-up lens, TTL is the camera lens overall length of described pick-up lens, ImgH is the half of described pick-up lens effective pixel area diameter on imaging surface, f1 is the focal length of described first lens, f2 is the focal length of described second lens, and f is the effective focal length of described pick-up lens.
2. pick-up lens as claimed in claim 1, is characterized in that, described pick-up lens also satisfies condition formula:
| (R1+R2)/(R1-R2) | < 0.4; And
-1.5＜R2/f＜-0.5；
Wherein, R1, R2 are respectively the thing side of described first lens and the radius-of-curvature in face, image side.
3. the pick-up lens as described in claim 1-2 any one, is characterized in that, described pick-up lens also satisfies condition formula:
-8 < (R5+R6)/(R5-R6) <-4; And
0.8＜f3/f＜1.6；
Wherein, R5, R6 are respectively the described thing side of the 3rd lens and the radius-of-curvature in face, image side, and f3 is the focal length of described 3rd lens.
4. the pick-up lens as described in claim 1-3 any one, is characterized in that, described pick-up lens also satisfies condition formula:
1.4＜CT1/CT2＜1.9；
And 1.8 < CT3/CT2 < 2.0;
Wherein, CT1 is the center thickness of described first lens, and CT2 is the center thickness of described second lens, and CT3 is the center thickness of described 3rd lens.
5. the pick-up lens as described in claim 1-4 any one, is characterized in that, described pick-up lens also satisfies condition formula:
0.4＜(CT1+CT2+CT3)/TTL＜0.6。
6. the pick-up lens as described in claim 1-5 any one, is characterized in that, the thing side of described first eyeglass is convex surface, and face, image side is convex surface.The thing side of described second eyeglass is concave surface, and face, image side is convex surface.The thing side of described 3rd eyeglass is convex surface, and face, image side is concave surface, and thing side and face, image side all exist a point of inflexion.
7. the pick-up lens as described in claim 1-6 any one, is characterized in that, described pick-up lens also comprises the diaphragm be arranged between object and the second lens.
8. the pick-up lens as described in claim 1-7 any one, is characterized in that, described first eyeglass, described second eyeglass and described 3rd eyeglass are all made of plastics.
9. the pick-up lens as described in claim 1-8 any one, is characterized in that, the face, image side of described second eyeglass exists a point of inflexion.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410554378.6A CN104391368B (en) | 2014-10-17 | The pick-up lens of three-chip type | |
| US14/777,262 US9804360B2 (en) | 2014-10-17 | 2015-03-03 | Lens assembly |
| JP2016553700A JP6099840B2 (en) | 2014-10-17 | 2015-03-03 | Imaging lens |
| PCT/CN2015/073581 WO2016058313A1 (en) | 2014-10-17 | 2015-03-03 | Camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410554378.6A CN104391368B (en) | 2014-10-17 | The pick-up lens of three-chip type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104391368A true CN104391368A (en) | 2015-03-04 |
| CN104391368B CN104391368B (en) | 2017-01-04 |
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