CN105988195B - Optical lens group and image-taking device - Google Patents

Abstract

The invention discloses a kind of optical lens group and image-taking device, optical lens group includes sequentially the first lens, the second lens and the third lens by object side to image side.First lens have positive refracting power, and object side surface is convex surface, and its object side surface and image side surface are all aspherical.Second lens have negative refracting power, and image side surface is concave surface, and its object side surface and image side surface are all aspherical.The third lens have refracting power, and object side surface is concave surface, and its object side surface and image side surface are all aspherical.When a specific condition is satisfied, it can balance because of spherical aberration and astigmatism caused by the high refracting power of the first lens, and the angle that peripheral light beam is incident in lens surface can be mitigated, to be effectively reduced the generation of stray light, the refracting power that the third lens can also be controlled simultaneously, to meet preferable back focal length degree.Invention additionally discloses a kind of image-taking devices with above-mentioned optical lens group.

Description

Optical lens group and image-taking device

Technical field

The present invention relates to a kind of optical lens group and image-taking devices, and more particularly to a kind of application on the electronic device small Type optical lens group and image-taking device.

Background technology

In recent years, with the rise of the electronic product with camera function, the demand of optical system increasingly improves.General light The photosensitive element of system is nothing more than being photosensitive coupling element (Charge Coupled Device, CCD) or complementary gold oxide Belong to two kinds of semiconductor element (Complementary Metal-Oxide Semiconductor Sensor, CMOS sensor), And progressing greatly with semiconductor process technique so that the Pixel Dimensions of photosensitive element reduce, and optical system is gradually led toward high pixel Domain is developed, therefore the requirement to image quality also increasingly increases.

The optical system of traditional vista shot (Telephoto) mostly uses multiple-piece construction and spherical glass lens of arranging in pairs or groups, Such configuration not only causes camera lens volume excessive without portable, meanwhile, the excessively high stepping back for also making consumer's prestige of production unit cost, because This existing optical system cannot be satisfied current ordinary consumer and pursue the convenient photography demand with multifunctionality.

Invention content

The purpose of the present invention is to provide a kind of optical lens group and image-taking devices, have refracting power configured with three pieces Lens, and its first lens design is to have positive refracting power, the aggregate capabilities of total system is concentrated on to the object side of camera lens, such as This one, so that it may the effectively volume of control optical lens group, to promote the convenience carried.In addition, the second lens design is tool Negative refracting power, can effectively reconcile aberration caused by the first lens, while can also control the focusing power of different-waveband.

A kind of optical lens group is provided according to the present invention, by object side to image side sequentially include the first lens, the second lens and The third lens.It is convex surface, and its object side surface and image side surface all aspheric that first lens, which have positive refracting power, object side surface, Face.Second lens have negative refracting power, and image side surface is concave surface, and its object side surface and image side surface are all aspherical.Third Lens have refracting power, and object side surface is concave surface, and its object side surface and image side surface are all aspherical.Optical lens group is more wrapped Containing an aperture, the lens without tool refracting power between the aperture and first lens.The lens with refracting power are in optical lens group Three pieces.The focal length of optical lens group is f, and the radius of curvature on the second lens image side surface is R4, the song of the third lens object side surface Rate radius is R5, and aperture to the third lens image side surface is SD in the distance on optical axis, and the first lens object side surface is saturating to third Mirror image side surface is TD in the distance on optical axis, meets following condition：

1.25<f/R4；

-1.0<R5/f<0；And

0.6<SD/TD<1.0。

A kind of image-taking device is more provided according to the present invention, including the photosensitive member of optical lens group and electronics as mentioned in the previous paragraph Part.

A kind of image-taking device is provided again according to the present invention, including optical lens group as mentioned in the previous paragraph, prism and sense electronics Optical element, optical lens group is between prism and electronics photosensitive element.

A kind of optical lens group is separately provided according to the present invention, includes sequentially the first lens, the second lens by object side to image side And the third lens.It is convex surface, and its object side surface and image side surface all aspheric that first lens, which have positive refracting power, object side surface, Face.Second lens have negative refracting power, and image side surface is concave surface, and its object side surface and image side surface are all aspherical.Third Lens have negative refracting power, and object side surface is concave surface, and its object side surface and image side surface are all aspherical.Have in optical lens It is three pieces to have the lens of refracting power, and the first lens are to the lens that the third lens are the independent non-bonding of three pieces.Optical lens group Focal length is f, and the radius of curvature on the second lens image side surface is R4, and the radius of curvature of the third lens object side surface is R5, is met Following condition：

1.25<f/R4；And

-2.6<R5/f<0。

A kind of optical lens group is provided again according to the present invention, includes sequentially the first lens, the second lens by object side to image side And the third lens.It is convex surface, and its object side surface and image side surface all aspheric that first lens, which have positive refracting power, object side surface, Face.Second lens have negative refracting power, and image side surface is concave surface, and its object side surface and image side surface are all aspherical.Third Lens have refracting power, and object side surface is concave surface, and its object side surface and image side surface are all aspherical.Optical lens group has The lens of refracting power are three pieces.The focal length of optical lens group is f, and the radius of curvature on the second lens image side surface is R4, and third is saturating The radius of curvature of mirror object side surface is R5, and the abbe number of the first lens is V1, and the abbe number of the second lens is V2, and third is saturating The abbe number of mirror is V3, meets following condition：

0.50<f/R4；

-2.6<R5/f<0；And

(V2+V3)/V1<1.0。

When f/R4 meets above-mentioned condition, can balance because of spherical aberration and aberration caused by the high refracting power of the first lens.

When R5/f meets above-mentioned condition, the angle that peripheral light beam is incident in lens surface can be mitigated, is reduced with effectively miscellaneous The generation of astigmatism can also control the refracting power of the third lens simultaneously, make to meet preferable system back focal length degree.

When SD/TD meets above-mentioned condition, be conducive to obtain optical lens group telecentricity (Telecentric) effect and regard greatly It is well balanced between rink corner.

Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.

Description of the drawings

Fig. 1 is painted a kind of schematic diagram of image-taking device according to first embodiment of the invention；

Fig. 2 is sequentially spherical aberration, astigmatism and the distortion curve graph of first embodiment from left to right；

Fig. 3 is painted a kind of schematic diagram of image-taking device according to second embodiment of the invention；

Fig. 4 is sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right；

Fig. 5 is painted a kind of schematic diagram of image-taking device according to third embodiment of the invention；

Fig. 6 is sequentially spherical aberration, astigmatism and the distortion curve graph of 3rd embodiment from left to right；

Fig. 7 is painted a kind of schematic diagram of image-taking device according to fourth embodiment of the invention；

Fig. 8 is sequentially spherical aberration, astigmatism and the distortion curve graph of fourth embodiment from left to right；

Fig. 9 is painted a kind of schematic diagram of image-taking device according to fifth embodiment of the invention；

Figure 10 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 5th embodiment from left to right；

Figure 11 is painted a kind of schematic diagram of image-taking device according to sixth embodiment of the invention；

Figure 12 is sequentially spherical aberration, astigmatism and the distortion curve graph of sixth embodiment from left to right；

Figure 13 is painted a kind of schematic diagram of image-taking device according to seventh embodiment of the invention；

Figure 14 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 7th embodiment from left to right；

Figure 15 is painted a kind of schematic diagram of image-taking device according to eighth embodiment of the invention；

Figure 16 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 8th embodiment from left to right；

Figure 17 is painted a kind of schematic diagram of image-taking device according to ninth embodiment of the invention；

Figure 18 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 9th embodiment from left to right；

Figure 19 is painted a kind of schematic diagram of image-taking device according to tenth embodiment of the invention；

Figure 20 is sequentially spherical aberration, astigmatism and the distortion curve graph of the tenth embodiment from left to right；

Figure 21 is painted a kind of schematic diagram of image-taking device according to eleventh embodiment of the invention；

Figure 22 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 11st embodiment from left to right；

Figure 23 is painted a kind of schematic diagram of image-taking device according to twelveth embodiment of the invention；

Figure 24 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 12nd embodiment from left to right；

Figure 25 is painted a kind of schematic diagram of image-taking device according to thriteenth embodiment of the invention；And

Figure 26 is the schematic diagram according to a kind of image-taking device of fourteenth embodiment of the invention.

Wherein, reference numeral

Aperture 100,200,300,400,500,600,700,800,900,1000,1100,1200

First lens 110,210,310,410,510,610,710,810,910,1010,1110,1210

Object side surface 111,211,311,411,511,611,711,811,911,1011,1111,1211

Image side surface 112,212,312,412,512,612,712,812,912,1012,1112,1212

Second lens 120,220,320,420,520,620,720,820,920,1020,1120,1220

Object side surface 121,221,321,421,521,621,721,821,921,1021,1121,1221

Image side surface 122,222,322,422,522,622,722,822,922,1022,1122,1222

The third lens 130,230,330,430,530,630,730,830,930,1030,1130,1230

Object side surface 131,231,331,431,531,631,731,831,931,1031,1131,1231

Image side surface 132,232,332,432,532,632,732,832,932,1032,1132,1232

Infrared ray filters out optical filter 140,240,340,440,540,640,740,840,940,1040,1140,1240

Imaging surface 150,250,350,450,550,650,750,850,950,1050,1150,1250

Electronics photosensitive element 160,260,360,460,560,660,760,860,960,1060,1160,1260

20 objects

21 prisms

The first lens of CT1 are in the thickness on optical axis

The second lens of CT2 are in the thickness on optical axis

The entrance pupil diameter of EPD optical lens groups

The focal length of f optical lens groups

The focal length of the first lens of f1

The focal length of the second lens of f2

The half at HFOV optical lens group maximums visual angle

The maximum image height of ImgH optical lens groups

The radius of curvature of R1 the first lens objects side surface

The radius of curvature on the first lens image sides R2 surface

The radius of curvature of R3 the second lens objects side surface

The radius of curvature on the second lens image sides R4 surface

The radius of curvature of R5 the third lens objects side surface

SD apertures are to the third lens image side surface in the distance on optical axis

The the first lens object side surfaces TD to the third lens image side surface is in the distance on optical axis

The the first lens object side surfaces TL are to imaging surface in the distance on optical axis

The first lens of T12 and the second lens are in the spacing distance on optical axis

The second lens of T23 are with the third lens in the spacing distance on optical axis

The abbe number of the first lens of V1

The abbe number of the second lens of V2

The abbe number of V3 the third lens

Specific implementation mode

The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：

The present invention provides a kind of optical lens group, includes sequentially the first lens, the second lens and third by object side to image side Lens.It is three pieces that wherein optical lens group, which has the lens of refracting power,.

First lens have positive refracting power, and object side surface is convex surface, and object side surface and image side surface are all aspherical (ASP).The object side surface of first lens can be the surface with maximum curvature in optical lens group, allow optical lens group whereby Aggregate capabilities concentrate on its object side, and the first lens of arranging in pairs or groups provide enough positive refracting powers, can efficiently control optical lens The overall volume of group, and then improve the convenience carried.

Second lens have negative refracting power, and image side surface is concave surface, and object side surface and image side surface are all aspherical；The One lens image side surface and the second lens object side surface are the surface with minimum curvature in optical lens group.It whereby, can be effective Aberration caused by the first lens of ground reconciliation, while can also control the focusing power of different-waveband.Second lens image side surface Curvature can be gradually increased by paraxial to off-axis place, so as to effectively controlling the marginal ray (Marginal Ray) of each visual field, be made Increase light-inletting quantity, to make image relatively sharp bright.

The third lens can have refracting power, object side surface be concave surface, image side surface can be convex surface, and object side surface and Image side surface is all aspherical；Whereby, the aberration of optical lens group can effectively be corrected.In addition, the song of the third lens object side surface Rate can be gradually increased by its paraxial to off-axis place, whereby, can effectively reinforce the receipts light efficiency of off-axis visual field, to promote image week The relative illumination on side.

The object side surface and image side surface of first lens, the second lens and the third lens are all aspherical namely first is saturating The object side surface and image side surface of mirror, the second lens and the third lens are the shapes being fabricated to other than spherical surface, whereby, can be obtained More controlled variable to cut down the effect of aberration, and then reduces the number that lens use, makes reduction optical lens group of the present invention Total length.

The focal length of optical lens group is f, and the radius of curvature on the second lens image side surface is R4, meets following condition： 0.50<f/R4.Whereby, it can balance because of spherical aberration and astigmatism caused by the high refracting power of the first lens.Preferably, following item can be met Part：1.25<f/R4.More preferably, following condition can be met：1.65<f/R4<6.0.

The focal length of optical lens group is f, and the radius of curvature of the third lens object side surface is R5, meets following condition：- 2.6<R5/f<0.Whereby, the angle that peripheral light beam is incident in lens surface can be mitigated, effectively to reduce the generation of stray light, and The refracting power that the third lens can be controlled simultaneously makes optical lens group meet preferable back focal length degree.Preferably, following item can be met Part：-1.0<R5/f<0.

The optical lens group of the present invention is separately provided with an aperture, and the lens without tool refracting power between aperture and the first lens, The setting of aperture can reduce stray light, make promotion image quality.Aperture to the image side surface of the third lens on optical axis away from From for SD, object side surface to the image side surfaces of the third lens of the first lens is TD in the distance on optical axis, meets following item Part：0.6<SD/TD<1.0.Whereby, be conducive to reinforce telecentricity (Telecentric) effect of optical lens group.

The abbe number of first lens is V1, and the abbe number of the second lens is V2, and the abbe number of the third lens is V3, It meets following condition：(V2+V3)/V1<1.0.Whereby, can effectively balance optical lens group overall aberration.

In the optical lens group of the present invention, the first lens to the third lens are the separate lenses of the non-bonding of three pieces；Change speech It in the first lens, the second lens and the third lens, appoints two adjacent with refracting power in the optical lens group of the present invention Lens between have a air gap.Since the more non-bonding lens of technique of bonding lens are complicated, the especially bonding in two lens Face need to possess the curved surface of high accuracy, can also be because inclined to reach the high adaptation when bonding of two lens, and during bonding Position and cause adaptation bad, influence optical imagery quality.Therefore, in optical lens group of the present invention, the first lens are saturating to third Mirror is the separate lenses of the non-bonding of three pieces, can be effectively improved the problem that binding lens.

The radius of curvature of first lens object side surface is R1, and the focal length of the first lens is f, can meet following condition：0< R1/f<0.40.Whereby, optical lens group light beam is can control, focusing range is made to concentrate, and then promotes distant view (Telephoto) and claps The ability taken the photograph.

First lens and the second lens are T12 in the spacing distance on optical axis, and the second lens are with the third lens on optical axis Spacing distance be T23, following condition can be met：0<T12/T23<1.0.Whereby, the space configuration between eyeglass can be balanced, is made Light has sufficient space to mitigate the variation of light path after reflecting strongly between the second lens and the third lens, so as to correcting aberration. Preferably, following condition can be met：0<T12/T23<0.50.

The focal length of optical lens group is f, and the maximum image height of optical lens group is ImgH, can meet following condition：2.3< f/ImgH<4.5.Whereby, it can effectively inhibit image pickup scope, local image is made to have higher resolving power.

The focal length of optical lens group is f, and the focal length of the first lens is f1, and the focal length of the second lens is f2, under can meeting Row condition：3.0<|f/f1|+|f/f2|<6.0.Whereby so that the ability of optical lens group control light beam concentrates on object side, with Strengthen the shooting ability of small angle.Preferably, following condition can be met：3.65<|f/f1|+|f/f2|<6.0.

First lens and the second lens are T12 at a distance from optical axis, and the second lens are CT2 in the thickness on optical axis, Following condition can be met：0<T12/CT2<0.80.Whereby, the spatial distribution ratio of tool refracting power material can be increased, and reduced not Necessary space configuration, with the service efficiency in improving optical lens group space.

The radius of curvature of first lens image side surface is R2, and the radius of curvature of the second lens object side surface is R3, can be expired Foot row condition：0.5<|(R2+R3)/(R2-R3)|<20.Whereby, to correct aberration.

The half at maximum visual angle is HFOV in optical lens group, can meet following condition：7.5 degree<HFOV<23.5 degree. Whereby, it can be ensured that optical lens group has enough visual fields.

First lens are CT1 in the thickness on optical axis, and the second lens are CT2 in the thickness on optical axis, can be met following Condition：0<CT1/CT2<1.65.Whereby, the mouldability and homogenieity of lens be can help to.Preferably, following condition can be met：0 <CT1/CT2<1.00。

First lens object side surface to the third lens image side surface is TD, the focal length of optical lens group in the distance on optical axis For f, following condition can be met：0.50<TD/f<0.90.Whereby, can control simultaneously with balance optical lens group overall volume with Vista shot ability.

First lens are CT1 in the thickness on optical axis, and the second lens are CT2 in the thickness on optical axis, and the third lens are in light Thickness on axis is CT3, can meet following condition：1.30<(CT2+CT3)/CT1.By the thickness of appropriately configured lens, have Conducive to the processing and manufacturing and assembling of optical lens group.

In optical lens group provided by the invention, the material of the first lens, the second lens and the third lens can be plastic cement, borrow Effectively to reduce production cost.

First lens object side surface is TL in the distance on optical axis to imaging surface, and the maximum image height of optical lens group is ImgH can meet following condition：2.0<TL/ImgH<3.5.Whereby, it can maintain to minimize, it is frivolous small-sized to be equipped on Change on electronic product.

The radius of curvature of second lens object side surface is R3, and the radius of curvature on the second lens image side surface is R4, can be expired Foot row condition：0.3<(R3+R4)/(R3-R4)<2.5.Whereby, contribute to the amendment of reinforcement aberration.

The maximum image height of a diameter of EPD of entrance pupil of optical lens group, optical lens group are ImgH, can meet following item Part：0.90<EPD/ImgH<1.7.Whereby, the receipts light quantity that image unit area can be increased, to promote image quality.

In optical lens group provided by the invention, the material of lens may be glass, be bent so as to increasing optical lens group Roll over the degree of freedom of power configuration.

Furthermore in optical lens group provided by the invention, if lens surface is convex surface and does not define the convex surface position, Indicate that the lens surface is convex surface at dipped beam axis；If lens surface is concave surface and does not define the concave surface position, surface should Lens surface is concave surface at dipped beam axis.In optical lens group provided by the invention, if lens have positive refracting power or negative flexion The focal length of power or lens all refers to refracting power or focal length at lens dipped beam axis.

The imaging surface of optical lens group can be a flat surface or have any song according to the difference of its corresponding electronics photosensitive element The curved surface of rate particularly relates to concave surface towards the curved surface toward object side direction.

The present invention optical lens group in, aperture configuration can be preposition aperture or in set aperture, wherein preposition aperture implies that Aperture is set between object and the first lens, in set aperture and then indicate that aperture is set between the first lens and imaging surface.If light Circle is preposition aperture, and the outgoing pupil (Exit Pupil) of optical photography lens group can be made to generate longer distance with imaging surface, made It is with telecentricity (Telecentric) effect, and the CCD or CMOS that can increase electronics photosensitive element receive the efficiency of image；If Aperture is set in, is contributed to the field angle for expanding lens group, is made optical photography lens group that there is the advantage of wide-angle lens.

The present invention provides a kind of image-taking device, including optical lens group above-mentioned and electronics photosensitive element, wherein electronics Photosensitive element is set to the imaging surface of optical lens group.It is set as having positive refracting power by the first lens, by optical lens group Aggregate capabilities concentrate on the object side of optical lens group and can effectively control the volume of optical lens group whereby, carried with being promoted Convenience；Second lens design is that tool bears refracting power, can effectively reconcile aberration caused by the first lens, while controlling not With the focusing power of wave band.Preferably, optical lens group can further include lens barrel (Barrel Member), support device (Holder Member) or combinations thereof.

According to the above embodiment, specific embodiment set forth below simultaneously coordinates attached drawing to be described in detail.

<First embodiment>

Fig. 1 and Fig. 2 is please referred to, wherein Fig. 1 is painted a kind of schematic diagram of image-taking device according to first embodiment of the invention, Fig. 2 is sequentially spherical aberration, astigmatism and the distortion curve graph of first embodiment from left to right.As shown in Figure 1, the capture of first embodiment Device includes optical lens group (not another label) and electronics photosensitive element 160.Optical lens group is sequentially wrapped by object side to image side Optical filter 140 and imaging surface 150 are filtered out containing aperture 100, the first lens 110, the second lens 120, the third lens 130, infrared ray, Electronics photosensitive element 160 is set to the imaging surface 150 of optical lens group.It is three pieces that optical lens group, which has the lens of refracting power, (110-130), and the first lens 110 to the third lens 130 are the separate lenses of the non-bonding of three pieces.

First lens 110 have positive refracting power, and are plastic cement material, and object side surface 111 is convex surface, image side surface 112 be concave surface, and object side surface 111 and image side surface 112 are all aspherical.Furthermore the object side surface 111 of the first lens 110 can For the surface with maximum curvature in optical lens group.

Second lens 120 have negative refracting power, and are plastic cement material, and object side surface 121 is convex surface, image side surface 122 be concave surface, and object side surface 121 and image side surface 122 are all aspherical.In addition, the image side surface 122 of the second lens 120 Curvature is gradually increased by paraxial to off-axis place, and the object side table of the image side surface 112 of the first lens 110 and the second lens 120 Face 121 is the surface with minimum curvature in optical lens group.

The third lens 130 have negative refracting power, and are plastic cement material, and object side surface 131 is concave surface, image side surface 132 be convex surface, and object side surface 131 and image side surface 132 are all aspherical.In addition, the object side surface 131 of the third lens 130 Curvature is gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray, which filters out optical filter 140, is set between the third lens 130 and imaging surface 150 and not shadow Ring the focal length of optical lens group.

The aspherical fitting equation of above-mentioned each lens indicates as follows：

；Wherein：

X：Apart from the point that optical axis is Y on aspherical, with the relative distance for being tangential on intersection point section on aspherical optical axis；

Y：The vertical range of point and optical axis in aspheric curve；

R：Radius of curvature；

k：Conical surface coefficient；And

Ai：I-th rank asphericity coefficient.

In the optical lens group of first embodiment, the focal length of optical lens group is f, the f-number (f- of optical lens group Number it is) Fno, the half (or being half angle of view) at maximum visual angle is HFOV in optical lens group, and numerical value is as follows：F= 6.2mm, Fno=2.55, HFOV=17.1 degree.

In the optical lens group of first embodiment, the abbe number of the first lens 110 is V1, the dispersion of the second lens 120 Coefficient is V2, and the abbe number of the third lens 130 is V3, meets following condition：(V2+V3)/V1=0.77.

In the optical lens group of first embodiment, the first lens 110 in the thickness on optical axis be CT1, the second lens 120 in Thickness on optical axis is CT2, meets following condition：CT1/CT2=0.80.

In the optical lens group of first embodiment, the first lens 110 in the thickness on optical axis be CT1, the second lens 120 in Thickness on optical axis is CT2, and the third lens 130 are CT3 in the thickness on optical axis, meet following condition：(CT2+CT3)/CT1 =2.25.

In the optical lens group of first embodiment, the first lens 110 are in the spacing distance on optical axis with the second lens 120 T12, the second lens 120 are CT2 in the thickness on optical axis, meet following condition：T12/CT2=0.12.

In the optical lens group of first embodiment, the first lens 110 are in the spacing distance on optical axis with the second lens 120 T12, the second lens 120 and the third lens 130 are T23 at a distance from optical axis, meet following condition：T12/T23=0.09.

In the optical lens group of first embodiment, the radius of curvature of the object side surface 111 of the first lens 110 is R1, optics The focal length of lens group is f, meets following condition：R1/f=0.25.

In the optical lens group of first embodiment, the focal length of optical lens group is f, the image side surface 122 of the second lens 120 Radius of curvature be R4, meet following condition：F/R4=2.80.

In the optical lens group of first embodiment, the radius of curvature of the object side surface 131 of the third lens 130 is R5, optics The focal length of lens group is f, meets following condition：R5/f=-0.35.

In the optical lens group of first embodiment, the radius of curvature on the image side surface 112 of the first lens 110 is R2, second The radius of curvature of the object side surface 121 of lens 120 is R3, meets following condition：| (R2+R3)/(R2-R3) |=9.32.

In the optical lens group of first embodiment, the radius of curvature of the object side surface 121 of the second lens 120 is R3, second The radius of curvature on the image side surface 122 of lens 120 is R4, meets following condition：(R3+R4)/(R3-R4)=1.49.

In the optical lens group of first embodiment, the focal length of optical lens group is f, and the focal length of the first lens 110 is f1, the The focal length of two lens 120 is f2, meets following condition：| f/f1 |+| f/f2 |=3.38.

In the optical lens group of first embodiment, the image side surface 132 of aperture 100 to the third lens 130 is on optical axis Distance is SD, and the image side surface 132 of object side surface 111 to the third lens 130 of the first lens 100 is in the distance on optical axis TD meets following condition：SD/TD=0.84.

In the optical lens group of first embodiment, object side surface 111 to the image side of the third lens 130 of the first lens 100 The distance on surface 132 is TD, and the focal length of optical lens group is f, meets following condition：TD/f=0.59.

In the optical lens group of first embodiment, the focal length of optical lens group is f, and the maximum image height of optical lens group is ImgH meets following condition：F/ImgH=3.10.

In the optical lens group of first embodiment, a diameter of EPD of maximum entrance pupil of optical lens group, optical lens group Maximum image height is ImgH, meets following condition：EPD/ImgH=1.22.

First implements in the optical lens group of power, and the object side surfaces 111 of the first lens 110 is to imaging surface 150 on optical axis Distance be TD, the maximum image height of optical lens group is ImgH, meets following condition：TL/ImgH=2.95.

Coordinate again with reference to following table one and table two.

Table one is the detailed structured data of Fig. 1 first embodiments, and wherein the unit of radius of curvature, thickness and focal length is mm, And surface 0-10 is sequentially indicated by the surface of object side to image side.Table two is the aspherical surface data in first embodiment, wherein k tables Conical surface coefficient in aspheric curve equation, A4-A14 then indicate each surface 4-14 rank asphericity coefficients.In addition, following Embodiment table is schematic diagram and the aberration curve figure of corresponding each embodiment, in table the definition of data all with first embodiment The definition of table one and table two is identical, repeats no more.

<Second embodiment>

Fig. 3 and Fig. 4 is please referred to, wherein Fig. 3 is painted a kind of schematic diagram of image-taking device according to second embodiment of the invention, Fig. 4 is sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right.From the figure 3, it may be seen that the capture of second embodiment Device includes optical lens group (not another label) and electronics photosensitive element 260.Optical lens group is sequentially wrapped by object side to image side Optical filter 240 and imaging surface are filtered out containing the first lens 210, aperture 200, the second lens 220, the third lens 230, infrared ray 250, electronics photosensitive element 260 is set to the imaging surface 250 of optical lens group；Wherein, there is refracting power in optical lens group Lens are three pieces (210-230), and the first lens 210 to the third lens 230 are the separate lenses of the non-bonding of three pieces.

First lens 210 have positive refracting power, and are plastic cement material, and object side surface 211 is convex surface, image side surface 212 be concave surface, and is all aspherical.Furthermore the object side surface 211 of the first lens 210 can be to have maximum in optical lens group The surface of curvature.

Second lens 220 have negative refracting power, and are plastic cement material, and object side surface 221 is convex surface, image side surface 222 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 222 of the second lens 220 by paraxial to off-axis place by It is cumulative to add, and the image side surface 212 of the first lens 210 and the object side surface 221 of the second lens 220 are to have in optical lens group The surface of minimum curvature.

The third lens 230 have positive refracting power, and are plastic cement material, and object side surface 231 is concave surface, image side surface 232 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 231 of the third lens 230 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 240, is set between the third lens 230 and imaging surface 250 and not shadow Ring the focal length of optical lens group.

Cooperation is with reference to following table three and table four.

In second embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table three and table four can extrapolate following data：

<3rd embodiment>

Fig. 5 and Fig. 6 is please referred to, wherein Fig. 5 is painted a kind of schematic diagram of image-taking device according to third embodiment of the invention, Fig. 6 is sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right.As shown in Figure 5, the capture of 3rd embodiment Device includes optical lens group (not another label) and electronics photosensitive element 360.Optical lens group is sequentially wrapped by object side to image side Optical filter 340 and imaging surface are filtered out containing the first lens 310, aperture 300, the second lens 320, the third lens 330, infrared ray 350, electronics photosensitive element 360 is set to the imaging surface 350 of optical photography lens group；Wherein, there is flexion in optical lens group The lens of power are three pieces (310-330), and the first lens 310 to the third lens 330 are the separate lenses of the non-bonding of three pieces.

First lens 310 have positive refracting power, and are plastic cement material, and object side surface 311 is convex surface, image side surface 312 be convex surface, and is all aspherical.Furthermore the object side surface 311 of the first lens 310 can be to have maximum in optical lens group The surface of curvature.

Second lens 320 have negative refracting power, and are plastic cement material, and object side surface 321 is concave surface, image side surface 322 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 322 of the second lens 320 by paraxial to off-axis place by It is cumulative to add, and the image side surface 312 of the first lens 310 and the object side surface 321 of the second lens 320 are to have in optical lens group The surface of minimum curvature.

The third lens 330 have negative refracting power, and are plastic cement material, and object side surface 331 is concave surface, image side surface 332 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 331 of the third lens 330 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 340, is set between the third lens 330 and imaging surface 350 and not shadow Ring the focal length of optical lens group.

Cooperation is with reference to following table five and table six.

In 3rd embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table five and table six can extrapolate following data：

<Fourth embodiment>

Fig. 7 and Fig. 8 is please referred to, wherein Fig. 7 is painted a kind of schematic diagram of image-taking device according to fourth embodiment of the invention, Fig. 8 is sequentially spherical aberration, astigmatism and the distortion curve graph of fourth embodiment from left to right.As shown in Figure 7, the capture of fourth embodiment Device includes optical lens group (not another label) and electronics photosensitive element 460.Optical lens group is sequentially wrapped by object side to image side Optical filter 440 and imaging surface are filtered out containing aperture 400, the first lens 410, the second lens 420, the third lens 430, infrared ray 450, electronics photosensitive element 460 is set to the imaging surface 450 of optical lens group；Wherein, there is refracting power in optical lens group Lens are three pieces (410-430), and the first lens 410 to the third lens 430 are the separate lenses of the non-bonding of three pieces.

First lens 410 have positive refracting power, are plastic cement material, and object side surface 411 is convex surface, image side surface 412 be convex surface, and is all aspherical.Furthermore the object side surface 411 of the first lens 410 can be to have maximum in optical lens group The surface of curvature.

Second lens 420 have negative refracting power, are plastic cement material, and object side surface 421 is concave surface, image side surface 422 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 422 of the second lens 420 by paraxial to off-axis place by It is cumulative to add, and the image side surface 412 of the first lens 410 and the object side surface 421 of the second lens 420 are to have in optical lens group The surface of minimum curvature.

The third lens 430 have negative refracting power, are plastic cement material, and object side surface 431 is concave surface, image side surface 432 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 431 of the third lens 430 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 440, is set between the third lens 430 and imaging surface 450 and not shadow Ring the focal length of optical lens group.

Cooperation is with reference to following table seven and table eight.

In fourth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table seven and table eight can extrapolate following data：

<5th embodiment>

Fig. 9 and Figure 10 is please referred to, wherein Fig. 9 is painted a kind of signal of image-taking device according to fifth embodiment of the invention Figure, Figure 10 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 5th embodiment from left to right.As shown in Figure 9, the 5th embodiment Image-taking device includes optical lens group (not another label) and electronics photosensitive element 560.Optical photography lens group is by object side to picture Side include sequentially aperture 500, the first lens 510, the second lens 520, the third lens 530, infrared ray filter out optical filter 540 and Imaging surface 550, electronics photosensitive element 560 are set to the imaging surface 550 of optical photography lens group；Wherein, have in optical lens group It is three pieces (510-530) to have the lens of refracting power, and the first lens 510 to the third lens 530 are the independent saturating of the non-bonding of three pieces Mirror.

First lens 510 have positive refracting power, are plastic cement material, and object side surface 511 is convex surface, image side surface 512 be convex surface, and is all aspherical.Furthermore the object side surface 511 of the first lens 510 can be to have maximum in optical lens group The surface of curvature.

Second lens 520 have negative refracting power, are plastic cement material, and object side surface 521 is concave surface, image side surface 522 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 522 of the second lens 520 by paraxial to off-axis place by It is cumulative to add, and the image side surface 512 of the first lens 510 and the object side surface 521 of the second lens 520 are to have in optical lens group The surface of minimum curvature.

The third lens 530 have negative refracting power, are plastic cement material, and object side surface 531 is concave surface, image side surface 532 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 531 of the third lens 530 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 540, is set between the third lens 530 and imaging surface 550 and not shadow Ring the focal length of optical lens group.

Cooperation is with reference to following table nine and table ten.

In 5th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table nine and table ten can extrapolate following data：

<Sixth embodiment>

Figure 11 and Figure 12 is please referred to, wherein Figure 11 is painted a kind of signal of image-taking device according to sixth embodiment of the invention Figure, Figure 12 are sequentially spherical aberration, astigmatism and the distortion curve graph of sixth embodiment from left to right.As shown in Figure 11, sixth embodiment Image-taking device include optical lens group (not another label) and electronics photosensitive element 660.Optical lens group is by object side to image side Include sequentially the first lens 610, aperture 600, the second lens 620, the third lens 630, infrared ray filter out optical filter 640 and at Image planes 650, electronics photosensitive element 660 are set to the imaging surface 650 of optical photography lens group；Wherein, have in optical lens group The lens of refracting power are three pieces (610-630), and the first lens 610 to the third lens 630 are the separate lenses of the non-bonding of three pieces.

First lens 610 have positive refracting power, are plastic cement material, and object side surface 611 is convex surface, image side surface 612 be convex surface, and is all aspherical.Furthermore the object side surface 611 of the first lens 610 can be to have maximum in optical lens group The surface of curvature.

Second lens 620 have negative refracting power, are plastic cement material, and object side surface 621 is concave surface, image side surface 622 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 622 of the second lens 620 by paraxial to off-axis place by It is cumulative to add, and the image side surface 612 of the first lens 610 and the object side surface 621 of the second lens 620 are to have in optical lens group The surface of minimum curvature.

The third lens 630 have negative refracting power, are plastic cement material, and object side surface 631 is concave surface, image side surface 632 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 631 of the third lens 630 is by its paraxial to off-axis place It gradually increases.

It is plastic cement material that infrared ray, which filters out optical filter 640, is set between the third lens 630 and imaging surface 650 and not shadow Ring the focal length of optical lens group.

Cooperation is with reference to following table 11 and table 12.

In sixth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 11 and table 12 can extrapolate following data：

<7th embodiment>

Figure 13 and Figure 14 is please referred to, wherein Figure 13 is painted a kind of signal of image-taking device according to seventh embodiment of the invention Figure, Figure 14 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 7th embodiment from left to right.As shown in Figure 13, the 7th embodiment Image-taking device include optical lens group (not another label) and electronics photosensitive element 760.Optical lens group is by object side to image side Include sequentially aperture 700, the first lens 710, the second lens 720, the third lens 730, infrared ray filter out optical filter 740 and at Image planes 750, electronics photosensitive element 760 are set to the imaging surface 750 of optical lens group；Wherein, there is flexion in optical lens group The lens of power are three pieces (710-730), and the first lens 710 to the third lens 730 are the separate lenses of the non-bonding of three pieces.

First lens 710 have positive refracting power, are plastic cement material, and object side surface 711 is convex surface, image side surface 712 be convex surface, and is all aspherical.Furthermore the object side surface 711 of the first lens 710 can be to have maximum in optical lens group The surface of curvature.

Second lens 720 have negative refracting power, are plastic cement material, and object side surface 721 is concave surface, image side surface 722 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 722 of the second lens 720 by paraxial to off-axis place by It is cumulative to add, and the image side surface 712 of the first lens 710 and the object side surface 721 of the second lens 720 are to have in optical lens group The surface of minimum curvature.

The third lens 730 have negative refracting power, are plastic cement material, and object side surface 731 is concave surface, image side surface 732 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 731 of the third lens 730 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 740, is set between the third lens 730 and imaging surface 750 and not shadow Ring the focal length of optical lens group.

Cooperation is with reference to following table 13 and table 14.

In 7th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 13 and table 14 can extrapolate following data：

<8th embodiment>

Figure 15 and Figure 16 is please referred to, wherein Figure 15 is painted a kind of signal of image-taking device according to eighth embodiment of the invention Figure, Figure 16 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 8th embodiment from left to right.As shown in Figure 15, the 8th embodiment Image-taking device include optical lens group (not another label) and electronics photosensitive element 860.Optical lens group is by object side to image side Include sequentially aperture 800, the first lens 810, the second lens 820, the third lens 830, infrared ray filter out optical filter 840 and at Image planes 850, electronics photosensitive element 860 are set to the imaging surface 850 of optical lens group；Wherein, there is flexion in optical lens group The lens of power are three pieces (810-830), and the first lens 810 to the third lens 830 are the separate lenses of the non-bonding of three pieces.

First lens 810 have positive refracting power, are plastic cement material, and object side surface 811 is convex surface, image side surface 812 be convex surface, and is all aspherical.Furthermore the object side surface 811 of the first lens 810 can be to have maximum in optical lens group The surface of curvature.

Second lens 820 have negative refracting power, are plastic cement material, and object side surface 821 is concave surface, image side surface 822 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 822 of the second lens 820 by paraxial to off-axis place by It is cumulative to add, and the image side surface 812 of the first lens 810 and the object side surface 821 of the second lens 820 are to have in optical lens group The surface of minimum curvature.

The third lens 830 have negative refracting power, are plastic cement material, and object side surface 831 is concave surface, image side surface 832 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 831 of the third lens 830 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 840, is set between the third lens 830 and imaging surface 850 and not shadow Ring the focal length of optical lens group.

Coordinate again with reference to following table 15 and table 16.

In 8th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 15 and table 16 can extrapolate following data：

<9th embodiment>

Figure 17 and Figure 18 is please referred to, wherein Figure 17 is painted a kind of signal of image-taking device according to ninth embodiment of the invention Figure, Figure 18 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 9th embodiment from left to right.As shown in Figure 17, the 9th embodiment Image-taking device include optical lens group (not another label) and electronics photosensitive element 960.Optical lens group is by object side to image side Include sequentially aperture 900, the first lens 910, the second lens 920, the third lens 930, infrared ray filter out optical filter 940 and at Image planes 950, electronics photosensitive element 960 are set to the imaging surface 950 of optical lens group；Wherein, there is flexion in optical lens group The lens of power are three pieces (910-930), and the first lens 910 to the third lens 930 are the separate lenses of the non-bonding of three pieces.

First lens 910 have positive refracting power, are plastic cement material, and object side surface 911 is convex surface, image side surface 912 be convex surface, and is all aspherical.Furthermore the object side surface 911 of the first lens 910 can be to have maximum in optical lens group The surface of curvature.

Second lens 920 have negative refracting power, are plastic cement material, and object side surface 921 is concave surface, image side surface 922 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 922 of the second lens 920 by paraxial to off-axis place by It is cumulative to add, and the image side surface 912 of the first lens 910 and the object side surface 921 of the second lens 920 are to have in optical lens group The surface of minimum curvature.

The third lens 930 have negative refracting power, are plastic cement material, and object side surface 931 is concave surface, image side surface 932 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 931 of the third lens 930 is by its paraxial to off-axis place It gradually increases.

It is glass material that infrared ray, which filters out optical filter 940, is set between the third lens 930 and imaging surface 950 and not shadow Ring the focal length of optical lens group.

Coordinate again with reference to following table 17 and table 18.

In 9th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 17 and table 18 can extrapolate following data：

<Tenth embodiment>

Figure 19 and Figure 20 is please referred to, wherein Figure 19 is painted a kind of signal of image-taking device according to tenth embodiment of the invention Figure, Figure 20 are sequentially spherical aberration, astigmatism and the distortion curve graph of the tenth embodiment from left to right.It appears from figure 19 that the tenth embodiment Image-taking device include optical lens group (not another label) and electronics photosensitive element 1060.Optical lens group is by object side to image side Sequentially optical filter 1040 is filtered out comprising aperture 1000, the first lens 1010, the second lens 1020, the third lens 1030, infrared ray And imaging surface 1050, electronics photosensitive element 1060 are set to the imaging surface 1050 of optical lens group；Wherein, in optical lens group Lens with refracting power are three pieces (1010-1030), and the first lens 1010 to the third lens 1030 are the non-bonding of three pieces Separate lenses.

First lens 1010 have positive refracting power, are plastic cement material, and object side surface 1011 is convex surface, image side surface 1012 be convex surface, and is all aspherical.Furthermore the object side surface 1011 of the first lens 1010 can be to have most in optical lens group The surface of deep camber.

Second lens 1020 have negative refracting power, are plastic cement material, and object side surface 1021 is concave surface, image side surface 1022 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 1022 of the second lens 1020 is by paraxial to off-axis place It gradually increases, and the image side surface 1012 of the first lens 1010 and the object side surface 1021 of the second lens 1020 are optical lens group In with minimum curvature surface.

The third lens 1030 have negative refracting power, are plastic cement material, and object side surface 1031 is concave surface, image side surface 1032 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 1031 of the third lens 1030 is paraxial to off-axis by its Place gradually increases.

Infrared ray filter out optical filter 1040 be glass material, be set between the third lens 1030 and imaging surface 1050 and The focal length of optical lens group is not influenced.

Coordinate again with reference to following table 19 and table 20.

In tenth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 19 and table 20 can extrapolate following data：

<11st embodiment>

Please refer to Figure 21 and Figure 22, wherein Figure 21 is painted to be shown according to a kind of image-taking device of eleventh embodiment of the invention It is intended to, Figure 22 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 11st embodiment from left to right.As shown in Figure 21, the ten one The image-taking device of embodiment includes optical lens group (not another label) and electronics photosensitive element 1160.Optical lens group is by object side To image side sequentially optical filtering is filtered out comprising the first lens 1110, aperture 1100, the second lens 1120, the third lens 1130, infrared ray Piece 1140 and imaging surface 1150, electronics photosensitive element 1160 are set to the imaging surface 1150 of optical lens group；Wherein, optical lens The lens with refracting power are three pieces (1110-1130) in microscope group, and the first lens 1110 to the third lens 1130 are that three pieces are non- The separate lenses of bonding.

First lens 1110 have positive refracting power, are plastic cement material, and object side surface 1111 is convex surface, image side surface 1112 be convex surface, and is all aspherical.Furthermore the object side surface 1111 of the first lens 1110 can be to have most in optical lens group The surface of deep camber.

Second lens 1120 have negative refracting power, are plastic cement material, and object side surface 1121 is concave surface, image side surface 1122 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 1122 of the second lens 1120 is by paraxial to off-axis place It gradually increases, and the image side surface 1112 of the first lens 1110 and the object side surface 1121 of the second lens 1120 are optical lens group In with minimum curvature surface.

The third lens 1130 have negative refracting power, are plastic cement material, and object side surface 1131 is concave surface, image side surface 1132 be concave surface, and is all aspherical.In addition, the curvature of the object side surface 1131 of the third lens 1130 is paraxial to off-axis by its Place gradually increases.

Infrared ray filter out optical filter 1140 be glass material, be set between the third lens 1130 and imaging surface 1150 and The focal length of optical lens group is not influenced.

Coordinate again with reference to following table 21 and table 22.

In 11st embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition be all identical with the first embodiment, not in this to go forth.

Cooperation table 21 and table 22 can extrapolate following data：

<12nd embodiment>

Please refer to Figure 23 and Figure 24, wherein Figure 23 is painted to be shown according to a kind of image-taking device of twelveth embodiment of the invention It is intended to, Figure 24 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 12nd embodiment from left to right.As shown in Figure 23, the ten two The image-taking device of embodiment includes optical lens group (not another label) and electronics photosensitive element 1260.Optical lens group is by object side To image side sequentially optical filtering is filtered out comprising aperture 1200, the first lens 1210, the second lens 1220, the third lens 1230, infrared ray Piece 1240 and imaging surface 1250, electronics photosensitive element 1260 are set to the imaging surface of optical lens group；Wherein, optical lens group In with refracting power lens be three pieces (1210-1230), and the first lens 1210 to the third lens 1230 be the non-bonding of three pieces Separate lenses.

First lens 1210 have positive refracting power, are plastic cement material, and object side surface 1211 is convex surface, image side surface 1212 be concave surface, and is all aspherical.Furthermore the object side surface 1211 of the first lens 1210 can be to have most in optical lens group The surface of deep camber.

Second lens 1220 have negative refracting power, are plastic cement material, and object side surface 1221 is convex surface, image side surface 1222 be concave surface, and is all aspherical.In addition, the curvature on the image side surface 1222 of the second lens 1220 is by paraxial to off-axis place It gradually increases, and the image side surface 1212 of the first lens 1210 and the object side surface 1221 of the second lens 1220 are optical lens group In with minimum curvature surface.

The third lens tool 1230 has positive refracting power, is plastic cement material, and object side surface 1231 is concave surface, image side surface 1232 be convex surface, and is all aspherical.In addition, the curvature of the object side surface 1231 of the third lens 1230 is paraxial to off-axis by its Place gradually increases.

Infrared ray filter out optical filter 1240 be glass material, be set between the third lens 1230 and imaging surface 1250 and The focal length of optical lens group is not influenced.

Coordinate again with reference to following table 23 and table 24.

In 12nd embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition be all identical with the first embodiment, not in this to go forth.

Cooperation table 23 and table 24 can extrapolate following data：

<13rd embodiment>

Figure 25 is please referred to, a kind of light path schematic diagram of image-taking device of thriteenth embodiment of the invention is painted.13rd is real The image-taking device for applying example includes optical lens group (not another label) and electronics photosensitive element 160 according to the present invention.It is special Illustrate, in fig. 25, optical lens group and electronics photosensitive element 160 are with the optical lens group depicted in first embodiment And electronics photosensitive element 160 is used as declared range, that is, the element numbers of the optical lens group depicted in Figure 25 are identical to first The optical lens group of embodiment；So in actual implementation, optical lens group and electronics photosensitive element can also be second embodiment To any groups of optical lens group and electronics photosensitive element in the 12nd embodiment.

Optical lens group is set between object 20 and electronics photosensitive element 160, and electronics photosensitive element 160 is set to light Learn the imaging surface 150 of lens group.Optical lens group to by the video imaging of object 20 in the electronics in imaging surface 150 is arranged Photosensitive element 160.

<14th embodiment>

Figure 26 is please referred to, a kind of light path schematic diagram of image-taking device of fourteenth embodiment of the invention is painted.14th is real The image-taking device for applying example includes optical lens group (not another label), prism 21 and an electronics photosensitive element 160.It to be illustrated It is that in fig. 26, optical lens group and electronics photosensitive element are with the optical lens group and sense electronics depicted in first embodiment Optical element is as declared range, that is, the element numbers of the optical lens group and electronics photosensitive element depicted in Figure 26 are identical to The optical lens group and electronics photosensitive element of one embodiment；So in actual implementation, optical lens group and electronics photosensitive element Can be any groups of optical lens group and electronics photosensitive element in second embodiment to the 12nd embodiment.

Optical lens group is set between object 20 and electronics photosensitive element 160, and electronics photosensitive element 160 is set to The imaging surface 150 of optical lens group, prism 21 are set between object 20 and optical lens group.Optical lens group is making object 20 video imaging of body in the electronics photosensitive element 160 positioned at imaging surface 150, prism 21 to make the light path of image-taking device turn to, So as to reducing image-taking device height, keep space configuration more flexible, even more with being equipped on thinned electronic.

Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, any to be familiar with this skill Or else person is detached from the spirit and scope of the present invention, when can do it is various change and retouch, therefore protection scope of the present invention is worked as Regard appended apply for a patent subject to instead as institute's defender.

Claims (23)

1. a kind of optical lens group, which is characterized in that include sequentially by object side to image side：

One first lens have positive refracting power, and object side surface is convex surface, and its object side surface and image side surface are all aspherical；

One second lens have negative refracting power, and image side surface is concave surface, and its object side surface and image side surface are all aspherical； And

One the third lens have refracting power, and object side surface is concave surface, and its object side surface and image side surface are all aspherical；

Wherein, which further includes an aperture, without tool refracting power lens between the aperture and first lens；

Wherein, the lens for having refracting power in the optical lens group are three pieces, and the focal length of the optical lens group is f, second lens The radius of curvature on image side surface is R4, and the radius of curvature of the third lens object side surface is R5, the aperture to the third lens picture Side surface is SD in distance on optical axis, and the first lens object side surface to the third lens image side surface is in the distance on optical axis The maximum image height of TD, the optical lens group are ImgH, which is in the spacing distance on optical axis with second lens T12, second lens are CT2 in the thickness on optical axis, meet following condition：

1.25<f/R4；

-1.0<R5/f<0；

0.6<SD/TD<1.0；

2.3<f/ImgH<4.5；And

0<T12/CT2<0.80。

2. optical lens group according to claim 1, which is characterized in that the third lens image side surface is convex surface.

3. optical lens group according to claim 1, which is characterized in that the radius of curvature of the first lens object side surface is The focal length of R1, the optical lens group are f, meet following condition：

0<R1/f<0.40。

4. optical lens group according to claim 1, which is characterized in that the focal length of the optical lens group be f, this second thoroughly The radius of curvature of mirror image side surface is R4, meets following condition：

1.65<f/R4<6.0。

5. optical lens group according to claim 1, which is characterized in that first lens to the third lens are that three pieces are non- The separate lenses of bonding, first lens and second lens are T12 in the spacing distance on optical axis, second lens with this Three lens are T23 in the spacing distance on optical axis, meet following condition：

0<T12/T23<1.0。

6. optical lens group according to claim 5, which is characterized in that first lens are with second lens on optical axis Spacing distance be T12, second lens and the third lens are T23 in the spacing distance on optical axis, meet following condition：

0<T12/T23<0.50。

7. optical lens group according to claim 1, which is characterized in that the focal length of the optical lens group be f, this first thoroughly The focal length of mirror is f1, and the focal length of second lens is f2, meets following condition：

3.65<|f/f1|+|f/f2|<6.0。

8. optical lens group according to claim 1, which is characterized in that the curvature on the second lens image side surface is by paraxial Place to off-axis place gradually increases.

9. a kind of image-taking device includes optical lens group described in claim 1 and an electronics photosensitive element.

10. a kind of image-taking device includes optical lens group, a prism and an electronics photosensitive element described in claim 1.

11. a kind of optical lens group, which is characterized in that include sequentially by object side to image side：

One first lens, it is convex surface to have positive refracting power, object side surface, and object side surface and image side surface are all aspherical；

One second lens, it is concave surface to have negative refracting power, image side surface, and object side surface and image side surface are all aspherical；With And

One the third lens, it is concave surface to have negative refracting power, object side surface, and object side surface and image side surface are all aspherical；

Wherein, the lens for having refracting power in the optical lens group are three pieces, and first lens to the third lens are that three pieces are non- The focal length of the separate lenses of bonding, the optical lens group is f, and the radius of curvature on the second lens image side surface is R4, the third The radius of curvature of lens object side surface is R5, and first lens and second lens are T12 in the spacing distance on optical axis, this One lens are CT1 in the thickness on optical axis, which is CT2 in the thickness on optical axis, meets following condition：

1.25<f/R4；

-2.6<R5/f<0；

0<T12/CT2<0.80；And

0<CT1/CT2<1.65。

12. optical lens group according to claim 11, which is characterized in that the third lens image side surface is convex surface, should Optical lens group further includes an aperture, and the lens without tool refracting power between the aperture and first lens.

13. optical lens group according to claim 11, which is characterized in that the radius of curvature on the first lens image side surface Radius of curvature for R2, the second lens object side surface is R3, meets following condition：

0.5<|(R2+R3)/(R2-R3)|<20。

14. optical lens group according to claim 11, which is characterized in that the half at maximum visual angle in the optical lens group For HFOV, meet following condition：

7.5 degree<HFOV<23.5 degree.

15. optical lens group according to claim 11, which is characterized in that first lens are in the thickness on optical axis CT1, second lens are CT2 in the thickness on optical axis, meet following condition：

0<CT1/CT2<1.00。

16. optical lens group according to claim 11, which is characterized in that the first lens object side surface is saturating to the third Mirror image side surface is TD in the distance on optical axis, and the focal length of the optical lens group is f, meets following condition：

0.50<TD/f<0.90。

17. optical lens group according to claim 11, which is characterized in that the curvature of the third lens object side surface is by close It is gradually increased to off-axis place at axis.

18. a kind of optical lens group, which is characterized in that include sequentially by object side to image side：

One first lens, it is convex surface to have positive refracting power, object side surface, and object side surface and image side surface are all aspherical；

One second lens, it is concave surface to have negative refracting power, image side surface, and object side surface and image side surface are all aspherical；With And

One the third lens, it is concave surface to have refracting power, object side surface, and object side surface and image side surface are all aspherical；

Wherein, it is three pieces, first lens, second lens and the third lens which, which has the lens of refracting power, Material be plastic cement, the focal length of the optical lens group is f, and the radius of curvature on the second lens image side surface is R4, and the third is saturating The radius of curvature of mirror object side surface is R5, and the abbe number of first lens is V1, and the abbe number of second lens is V2, should The abbe number of the third lens is V3, and first lens and second lens are T12 in the spacing distance on optical axis, this is second thoroughly Mirror is CT2 in the thickness on optical axis, and the first lens object side surface a to imaging surface is TL, the optical lens in the distance on optical axis The maximum image height of microscope group is ImgH, meets following condition：

0.50<f/R4；

-2.6<R5/f<0；

(V2+V3)/V1<1.0；

0<T12/CT2<0.80；And

2.0<TL/ImgH<3.5。

19. optical lens group according to claim 18, which is characterized in that first lens are in the thickness on optical axis CT1, second lens are CT2 in the thickness on optical axis, which is CT3 in the thickness on optical axis, meets following item Part：

1.30<(CT2+CT3)/CT1。

20. optical lens group according to claim 18, which is characterized in that the radius of curvature of the second lens object side surface Radius of curvature for R3, the second lens image side surface is R4, meets following condition：

0.3<(R3+R4)/(R3-R4)<2.5。

21. optical lens group according to claim 18, which is characterized in that the entrance pupil of the optical lens group is a diameter of The maximum image height of EPD, the optical lens group are ImgH, meet following condition：

0.90<EPD/ImgH<1.7。

22. optical lens group according to claim 18, which is characterized in that the focal length of the optical lens group is f, this first The focal length of lens is f1, and the focal length of second lens is f2, meets following condition：

3.0<|f/f1|+|f/f2|<6.0。

23. optical lens group according to claim 18, which is characterized in that first lens to the third lens are three pieces The separate lenses of non-bonding, the third lens image side surface are convex surface, which further includes an aperture, the aperture with should Lens without tool refracting power between first lens.