CN105988195A - Optical lens group and image capture apparatus - Google Patents

Abstract

The invention discloses an optical lens group and an image capture apparatus. From the object side to the imaging side, the optical lens group successively includes: a first lens, a second lens and a third lens, wherein the first lens is provided with positive refraction power; the object side surface of the first lens is a convex surface, and both the object side surface and the imaging side surface are aspheric surfaces; the second lens is provided with negative refraction power; the imaging side surface of the second lens is a concave surface, and both the object side surface and the imaging side surface of the second lens are aspheric surfaces; the third lens is provided with refraction power; and the object side surface of the third lens is a concave surface, and both the object side surface and the imaging side surface of the third lens are aspheric surfaces. When a specific condition is satisfied, the spherical aberration and astigmatism generated because of the high refraction power of the first lens can be balanced and the incident angle of the surrounding light beam into the surface of the lens can be relieved, so that generation of the stray light can be effectively reduced and the refraction power of the third lens can be controlled at the same time to enable the refraction power of the third lens to accord with a better back focal length. The invention also discloses an image capture apparatus with the 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 device, and apply at electronic installation particularly to one On miniaturized optical battery of lens and image-taking device.

Background technology

In recent years, along with the rise of the electronic product with camera function, the demand of optical system day by day improves. The photo-sensitive cell of general optical system is nothing more than being photosensitive coupling element (Charge Coupled Device, CCD) Or Complimentary Metal-Oxide semiconductor element (Complementary Metal-Oxide Semiconductor Sensor, CMOS sensor) two kinds, and progressing greatly along with semiconductor process technique so that photo-sensitive cell Pixel Dimensions reduces, and optical system gradually develops toward high pixel neighborhoods, therefore the requirement also day to image quality Benefit increases.

Optical system many employings multiple-piece construction of tradition vista shot (Telephoto) spherical glass of arranging in pairs or groups Lens, this type of configuration not only causes camera lens volume excessive and the most portable, and meanwhile, production unit cost is too high also to be made The stepping back of consumer's prestige, the most existing optical system cannot meet current ordinary consumer pursue convenient with Polyfunctional photography demand.

Summary of the invention

It is an object of the invention to provide a kind of optical lens group and image-taking device, it is configured with three and has in the wrong The lens of folding power, and its first lens design is for having positive refracting power, the aggregate capabilities of total system to be concentrated In the thing side of camera lens, thus, so that it may effectively control the volume of optical lens group, carry with lifting Convenience.Additionally, the second lens design is the negative refracting power of tool, can effectively be in harmonious proportion produced by the first lens Aberration, also can control the focusing power of different-waveband simultaneously.

There is provided a kind of optical lens group according to the present invention, by thing side to image side sequentially comprise the first lens, second Lens and the 3rd lens.First lens have positive refracting power, and its thing side surface is convex surface, and its thing side surface And surface, image side all aspheric surfaces.Second lens have negative refracting power, and its surface, image side is concave surface, and its thing side Surface and surface, image side all aspheric surfaces.3rd lens have refracting power, and its thing side surface is concave surface, and its thing Side surface and surface, image side all aspheric surfaces.Optical lens group further includes an aperture, this aperture and these first lens Between without tool refracting power lens.The lens in optical lens group with refracting power are three.Optical lens group Focal length is f, and the radius of curvature on the second surface, lens image side is R4, the radius of curvature of the 3rd lens thing side surface For R5, the aperture to the 3rd surface, lens image side distance on optical axis is SD, and the first lens thing side surface is extremely 3rd surface, lens image side distance on optical axis is TD, and it meets following condition:

1.25<f/R4；

-1.0<R5/f<0；And

0.6<SD/TD<1.0。

More provide a kind of image-taking device according to the present invention, comprise optical lens group as in the previous paragraph and electronics Photo-sensitive cell.

Reoffer a kind of image-taking device according to the present invention, comprise optical lens group as in the previous paragraph, prism and Sense electronics optical element, optical lens group is between prism and sense electronics optical element.

Separately provide a kind of optical lens group according to the present invention, by thing side to image side sequentially comprise the first lens, the Two lens and the 3rd lens.First lens have positive refracting power, and its thing side surface is convex surface, and its thing side table Face and surface, image side all aspheric surfaces.Second lens have negative refracting power, and its surface, image side is concave surface, and its thing Side surface and surface, image side all aspheric surfaces.3rd lens have negative refracting power, and its thing side surface is concave surface, and Its thing side surface and surface, image side all aspheric surfaces.The lens in optical lens with refracting power are three, and the One lens are to the lens that the 3rd lens are three non-bondings of independence.The focal length of optical lens group is f, and second is saturating The radius of curvature on image side surface is R4, and the radius of curvature of the 3rd lens thing side surface is R5, under it meets Row condition:

1.25<f/R4；And

-2.6<R5/f<0。

There is provided again a kind of optical lens group according to the present invention, by thing side to image side sequentially comprise the first lens, the Two lens and the 3rd lens.First lens have positive refracting power, and its thing side surface is convex surface, and its thing side table Face and surface, image side all aspheric surfaces.Second lens have negative refracting power, and its surface, image side is concave surface, and its thing Side surface and surface, image side all aspheric surfaces.3rd lens have refracting power, and its thing side surface is concave surface, and its Thing side surface and surface, image side all aspheric surfaces.It is three that optical lens group has the lens of refracting power.Optical lens The focal length of mirror group is f, and the radius of curvature on the second surface, lens image side is R4, the song of the 3rd lens thing side surface Rate radius is R5, and the abbe number of the first lens is V1, and the abbe number of the second lens is V2, the 3rd The abbe number of lens is V3, and it 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 picture produced by the first lens height refracting power Difference.

When R5/f meets above-mentioned condition, peripheral light beam can be relaxed and be incident in the angle of lens surface, to have Effect reduces the generation of veiling glare, also can control the refracting power of the 3rd lens simultaneously, makes to meet preferably after system Burnt length.

When SD/TD meets above-mentioned condition, be conducive to obtaining optical lens group telecentricity (Telecentric) effect And well balanced between the big angle of visual field.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as to the present invention's Limit.

Accompanying drawing explanation

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

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

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

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

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

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

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

Fig. 8 is sequentially the spherical aberration of the 4th embodiment, astigmatism from left to right and distorts curve chart；

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Wherein, reference

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

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

Surface, image side 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

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

Surface, image side 122,222,322,422,522,622,722,822,922,1022,1122,1222

3rd lens 130,230,330,430,530,630,730,830,930,1030,1130,1230

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

Surface, image side 132,232,332,432,532,632,732,832,932,1032,1132,1232

Infrared ray filter 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

Sense electronics optical element 160,260,360,460,560,660,760,860,960,1060,1160, 1260

20 objects

21 prisms

CT1 the first lens thickness on optical axis

CT2 the second lens thickness on optical axis

The entrance pupil diameter of EPD optical lens group

The focal length of f optical lens group

The focal length of f1 the first lens

The focal length of f2 the second lens

The half at HFOV optical lens group maximum visual angle

The maximum image height of ImgH optical lens group

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

The radius of curvature on surface, R2 the first lens image side

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

The radius of curvature on surface, R4 the second lens image side

The radius of curvature of R5 the 3rd lens thing side surface

SD aperture is the distance on optical axis to the 3rd surface, lens image side

TD the first lens thing side surface is the distance on optical axis to the 3rd surface, lens image side

TL the first lens thing side surface is to imaging surface distance on optical axis

T12 the first lens and second lens spacing distance on optical axis

T23 the second lens and the 3rd lens spacing distance on optical axis

The abbe number of V1 the first lens

The abbe number of V2 the second lens

The abbe number of V3 the 3rd lens

Detailed description of the invention

Structural principle and operation principle to the present invention are described in detail below in conjunction with the accompanying drawings:

The present invention provides a kind of optical lens group, thing side to image side sequentially comprise the first lens, the second lens And the 3rd lens.Wherein optical lens group has the lens of refracting power is three.

First lens have positive refracting power, and its thing side surface is convex surface, and thing side surface and surface, image side the most non- Sphere (ASP).The thing side surface of the first lens can be the surface in optical lens group with maximum curvature, borrows This allows the aggregate capabilities of optical lens group concentrate on its thing side, and collocation the first lens provide enough the most in the wrong Folding power, can efficiently control the overall volume of optical lens group, and then improve the convenience carried.

Second lens have negative refracting power, and its surface, image side is concave surface, and thing side surface and surface, image side the most non- Sphere；First surface, lens image side and the second lens thing side surface are to have minimum curvature in optical lens group Surface.Whereby, can effectively be in harmonious proportion aberration produced by the first lens, also can control different-waveband simultaneously Focusing power.The curvature of the second surface, lens image side can be gradually increased by paraxial to off-axis place, so as to effectively Control the marginal ray (Marginal Ray) of each visual field, make increase light-inletting quantity, to make image relatively sharp bright Bright.

3rd lens can have refracting power, and its thing side surface is concave surface, and its surface, image side can be convex surface, and thing Side surface and surface, image side all aspheric surfaces；Whereby, the aberration of optical lens group can effectively be revised.Additionally, The curvature of the 3rd lens thing side surface can be gradually increased by its paraxial to off-axis place, whereby, can effectively strengthen The receipts light efficiency of off-axis visual field, to promote the relative illumination of image periphery.

First lens, the second lens and the thing side surface of the 3rd lens and surface, image side are all aspheric surfaces, namely First lens, the second lens and the thing side surface of the 3rd lens and surface, image side are to be fabricated to the shape beyond sphere Shape, whereby, it is possible to obtain more controlled variable, to cut down the effect of aberration, and then reduction lens use Number, make the total length of reduction optical lens group of the present invention.

The focal length of optical lens group is f, and the radius of curvature on the second surface, lens image side is R4, and it meets following Condition: 0.50 < f/R4.Whereby, can balance because of spherical aberration and astigmatism produced by the first lens height refracting power. It is preferred that following condition can be met: 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 3rd lens thing side surface is R5, and it meets following Condition :-2.6 < R5/f < 0.Whereby, peripheral light beam can be relaxed and be incident in the angle of lens surface, with effectively The generation of reduction veiling glare, and the refracting power of the 3rd lens can be controlled simultaneously, make optical lens group meet preferably Back focal length degree.It is preferred that following condition can be met :-1.0 < R5/f < 0.

The optical lens group of the present invention is separately provided with between an aperture, and aperture and the first lens without tool refracting power Lens, arranging of aperture can reduce veiling glare, make lifting image quality.Aperture is to the image side of the 3rd lens Surface distance on optical axis is SD, and the surface, image side of the thing side surface of the first lens to the 3rd lens is in light Distance on axle is TD, and it meets following condition: 0.6 < SD/TD < 1.0.Whereby, be conducive to adding high light Learn telecentricity (Telecentric) effect of battery of lens.

The abbe number of the first lens is V1, and the abbe number of the second lens is V2, the dispersion of the 3rd lens Coefficient is V3, and it meets following condition: (V2+V3)/V1 < 1.0.Whereby, can balance optical effectively The aberration that battery of lens is overall.

In the optical lens group of the present invention, the first lens to the 3rd lens are the independent saturating of three non-bondings Mirror；In other words, in the optical lens group of the present invention, in the first lens, the second lens and the 3rd lens, Between the wantonly two adjacent lens with refracting power, there is a air gap.More non-glutinous owing to binding the technique of lens Conjunction lens are complicated, and the bond area at two lens especially need to have the curved surface of high accuracy, in order to reach two lens and stick High adaptation during conjunction, and during binding, it is also possible to cause because of off normal adaptation the best, affect light Learn image quality.Therefore, in optical lens group of the present invention, the first lens to the 3rd lens are three non-bondings Separate lenses, can be effectively improved bonding lens produced by problem.

The radius of curvature of the first lens thing side surface is R1, and the focal length of the first lens is f, and it can meet following Condition: 0 < R1/f < 0.40.Whereby, optical lens group light beam can be controlled, make focusing range concentrate, enter And promote the ability that distant view (Telephoto) shoots.

First lens and second lens spacing distance on optical axis are T12, the second lens and the 3rd lens in Spacing distance on optical axis is T23, and it can meet following condition: 0 < T12/T23 < 1.0.Whereby, may be used Space configuration between balance eyeglass, makes light after strong refraction, has foot between the second lens and the 3rd lens The change of light path is relaxed in enough spaces, so as to revising aberration.It is preferred that 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, and it can meet following Condition: 2.3 < f/ImgH < 4.5.Whereby, can effectively suppress image pickup scope, make local image have higher Resolution.

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, its Following condition: 3.0 < | f/f1 |+| f/f2 | < 6.0 can be met.Whereby so that optical lens group controls the energy of light beam Power concentrates on thing side, to strengthen the shooting ability of small angle.It is preferred that following condition can be met: 3.65 <|f/f1|+|f/f2|<6.0。

First lens and second lens distance on optical axis are T12, and second lens thickness on optical axis is CT2, it can meet following condition: 0 < T12/CT2 < 0.80.Whereby, tool refracting power material can be increased Spatial distribution ratio, and reduce unnecessary space configuration, with the service efficiency in improving optical battery of lens space.

The radius of curvature of the first surface, lens image side is R2, and the radius of curvature of the second lens thing side surface is R3, It can meet following condition: 0.5 < | (R2+R3)/(R2-R3) | < 20.Whereby, to revise aberration.

In optical lens group, the half at maximum visual angle is HFOV, and it 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 thickness on optical axis is CT1, and second lens thickness on optical axis is CT2, and it can Meet following condition: 0 < CT1/CT2 < 1.65.Whereby, can help to mouldability and the homogeneity of lens. It is preferred that following condition can be met: 0 < CT1/CT2 < 1.00.

The first lens thing side surface to the 3rd surface, lens image side distance on optical axis is TD, optical lens The focal length of group is f, and it can meet following condition: 0.50 < TD/f < 0.90.Whereby, can control simultaneously with Balance optical battery of lens overall volume and vista shot ability.

First lens thickness on optical axis is CT1, and second lens thickness on optical axis is CT2, the 3rd Lens thickness on optical axis is CT3, and it can meet following condition: 1.30 < (CT2+CT3)/CT1.Borrow By processing and manufacturing and the assembling of the thickness of appropriately configured lens, beneficially optical lens group.

In the optical lens group that the present invention provides, the material of the first lens, the second lens and the 3rd lens can be Plastic cement, so as to effectively reducing production cost.

First lens thing side surface is TL to imaging surface distance on optical axis, the maximum picture of optical lens group A height of ImgH, it can meet following condition: 2.0 < TL/ImgH < 3.5.Whereby, miniaturization can be maintained, To be equipped on frivolous miniaturized electronic product.

The radius of curvature of the second lens thing side surface is R3, and the radius of curvature on the second surface, lens image side is R4, It can meet following condition: 0.3 < (R3+R4)/(R3-R4) < 2.5.Whereby, contribute to strengthening repairing of aberration Just.

The a diameter of EPD of entrance pupil of optical lens group, the maximum image height of optical lens group is ImgH, and it can Meet following condition: 0.90 < EPD/ImgH < 1.7.Whereby, the receipts light of image unit are can be increased Amount, to promote image quality.

In the optical lens group that the present invention provides, the material of lens can also be glass, so as to increasing optical lens The degree of freedom of mirror group refracting power configuration.

Furthermore, in the optical lens group that the present invention provides, if lens surface is convex surface and does not defines this convex surface position When putting, then it represents that this lens surface is convex surface at dipped beam axle；If lens surface is concave surface and not define this recessed During position, face, then this lens surface of surface is concave surface at dipped beam axle.In the optical lens group that the present invention provides, If lens have positive refracting power or negative refracting power, or the focal length of lens, all refer to the flexion at lens dipped beam axle Power or focal length.

The imaging surface of optical lens group, according to the difference of the sense electronics optical element of its correspondence, can be a plane or have The curved surface of arbitrary curvature, particularly relate to concave surface towards toward thing side to curved surface.

In the optical lens group of the present invention, aperture configuration can be preposition aperture or in put aperture, the most preposition light Circle implies that aperture is arranged between object and the first lens, in put aperture and then represent that aperture is arranged at the first lens And between imaging surface.If aperture is preposition aperture, can make the outgoing pupil (Exit Pupil) of optical photography battery of lens with Imaging surface produces longer distance so that it is have telecentricity (Telecentric) effect, and it is photosensitive to increase electronics CCD or CMOS of element receives the efficiency of image；Put aperture in if, contribute to expanding battery of lens The angle of visual field, makes optical photography battery of lens have the advantage of wide-angle lens.

The present invention provides a kind of image-taking device, comprises aforesaid optical lens group and sense electronics optical element, its Middle sense electronics optical element is arranged at the imaging surface of optical lens group.It is set to have positive flexion by the first lens Power, so that the aggregate capabilities of optical lens group to concentrate on the thing side of optical lens group, whereby, can effectively control The volume of optical lens group processed, the convenience carried with lifting；Second lens design is the negative refracting power of tool, can Effectively it is in harmonious proportion aberration produced by the first lens, controls the focusing power of different-waveband simultaneously.It is preferred that Optical lens group can further include lens barrel (Barrel Member), support device (Holder Member) or its Combination.

According to above-mentioned embodiment, specific embodiment set forth below also coordinates accompanying drawing to be described in detail.

<first embodiment>

Refer to Fig. 1 and Fig. 2, wherein Fig. 1 illustrates a kind of image-taking device according to first embodiment of the invention Schematic diagram, Fig. 2 be sequentially from left to right the spherical aberration of first embodiment, astigmatism and distort curve chart.By scheming 1 understands, and the image-taking device of first embodiment comprises optical lens group (not another label) and sense electronics optical element 160.Optical lens group is sequentially comprised aperture the 100, first lens the 110, second lens by thing side to image side 120, the 3rd lens 130, infrared ray filter optical filter 140 and imaging surface 150, sense electronics optical element 160 It is arranged at the imaging surface 150 of optical lens group.It is three that optical lens group has the lens of refracting power , and the first lens 110 are to the separate lenses that the 3rd lens 130 are three non-bondings (110-130).

First lens 110 have positive refracting power, and are plastic cement material, and its thing side surface 111 is convex surface, its Surface, image side 112 is concave surface, and thing side surface 111 and surface, image side 112 all aspheric surfaces.Furthermore, first The thing side surface 111 of lens 110 can be the surface in optical lens group with maximum curvature.

Second lens 120 have negative refracting power, and are plastic cement material, and its thing side surface 121 is convex surface, its Surface, image side 122 is concave surface, and thing side surface 121 and surface, image side 122 all aspheric surfaces.Additionally, second The curvature on the surface, image side 122 of lens 120 is gradually increased by paraxial to off-axis place, and the first lens 110 Surface, image side 112 and the thing side surface 121 of the second lens 120 in optical lens group, there is minimum curvature Surface.

3rd lens 130 have negative refracting power, and are plastic cement material, and its thing side surface 131 is concave surface, its Surface, image side 132 is convex surface, and thing side surface 131 and surface, image side 132 all aspheric surfaces.Additionally, the 3rd The curvature of the thing side surface 131 of lens 130 is gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 140, and it is arranged at the 3rd lens 130 and imaging surface 150 Between and do not affect the focal length of optical lens group.

The aspheric fitting equation of above-mentioned each lens is expressed as follows:

$X\left(Y\right)=(Y^2/R)/(1+\mathrm{sqrt}(1-(1+k)\&times;{(Y/R)}^2))+\underset{i}{\mathrm{\&Sigma;}}\left(\mathrm{Ai}\right)\&times;\left(Y^i\right);$

；Wherein:

X: in aspheric surface, distance optical axis is the point of Y, its be tangential on the phase of intersection point tangent plane on aspheric surface optical axis Adjust the distance；

Y: the point in aspheric curve and the vertical dimension of optical axis；

R: radius of curvature；

K: conical surface coefficient；And

Ai: the i-th rank asphericity coefficient.

In the optical lens group of first embodiment, the focal length of optical lens group is f, the aperture of optical lens group Value (f-number) is Fno, and in optical lens group, the half (or referred to as half angle of view) at maximum visual angle is HFOV, Its 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 second lens The abbe number of 120 is V2, and the abbe number of the 3rd lens 130 is V3, and it meets following condition: (V2+V3)/V1=0.77.

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

In the optical lens group of first embodiment, first lens 110 thickness on optical axis is CT1, second The lens 120 thickness on optical axis is CT2, and the 3rd lens 130 thickness on optical axis is CT3, and it is full Foot row condition: (CT2+CT3)/CT1=2.25.

In the optical lens group of first embodiment, between the first lens 110 and the second lens 120 are on optical axis Spacing from for T12, second lens 120 thickness on optical axis is CT2, and it meets following condition: T12/CT2 =0.12.

In the optical lens group of first embodiment, between the first lens 110 and the second lens 120 are on optical axis Spacing from for T12, the second lens 120 and the 3rd lens 130 distance on optical axis are T23, and it meets Following condition: T12/T23=0.09.

In the optical lens group of first embodiment, the radius of curvature of the thing side surface 111 of the first lens 110 is R1, the focal length of optical lens group is f, and it 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 picture of the second lens 120 The radius of curvature of side surface 122 is R4, and it meets following condition: f/R4=2.80.

In the optical lens group of first embodiment, the radius of curvature of the thing side surface 131 of the 3rd lens 130 is R5, the focal length of optical lens group is f, and it meets following condition: R5/f=-0.35.

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

In the optical lens group of first embodiment, the radius of curvature of the thing side surface 121 of the second lens 120 is R3, the radius of curvature on the surface, image side 122 of the second lens 120 is R4, and it 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, Jiao of the first lens 110 Away from for f1, the focal length of the second lens 120 is f2, and it meets following condition: | f/f1 |+| f/f2 |=3.38.

In the optical lens group of first embodiment, the surface, image side 132 of aperture 100 to the 3rd lens 130 Distance on optical axis is SD, the image side of the thing side surface 111 of the first lens 100 to the 3rd lens 130 The surface 132 distance on optical axis is TD, and it meets following condition: SD/TD=0.84.

In the optical lens group of first embodiment, the thing side surface 111 of the first lens 100 is to the 3rd lens The distance on the surface, image side 132 of 130 is TD, and the focal length of optical lens group is f, and it meets following condition: TD/f=0.59.

In the optical lens group of first embodiment, the focal length of optical lens group is f, the maximum of optical lens group Image height is ImgH, and it 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, light The maximum image height learning battery of lens is ImgH, and it meets following condition: EPD/ImgH=1.22.

In first optical lens group implementing power, thing side surface 111 to the imaging surface 150 of the first lens 110 Distance on optical axis is TD, and the maximum image height of optical lens group is ImgH, and it meets following condition: TL/ImgH=2.95.

Coordinate again with reference to lower list one and table two.

Table one is the structured data that Fig. 1 first embodiment is detailed, wherein the list of radius of curvature, thickness and focal length Position is mm, and surface 0-10 sequentially represents by the surface of thing side to image side.Table two is in first embodiment Aspherical surface data, wherein, the conical surface coefficient in k table aspheric curve equation, A4-A14 then represents 4-14 rank, each surface asphericity coefficient.Additionally, following embodiment form is showing of corresponding each embodiment Be intended to and aberration curve figure, in form the definition of data all with table one and the definition phase of table two of first embodiment With, repeat no more.

<the second embodiment>

Refer to Fig. 3 and Fig. 4, wherein Fig. 3 illustrates a kind of image-taking device according to second embodiment of the invention Schematic diagram, Fig. 4 be sequentially from left to right the spherical aberration of the second embodiment, astigmatism and distort curve chart.By scheming 3 understand, and the image-taking device of the second embodiment comprises optical lens group (not another label) and sense electronics optical element 260.Optical lens group is sequentially comprised the first lens 210, aperture the 200, second lens by thing side to image side 220, the 3rd lens 230, infrared ray filter optical filter 240 and imaging surface 250, sense electronics optical element 260 imaging surfaces 250 being arranged at optical lens group；Wherein, optical lens group has the lens of refracting power It is three (210-230), and the first lens 210 are to the separate lenses that the 3rd lens 230 are three non-bondings.

First lens 210 have positive refracting power, and are plastic cement material, and its thing side surface 211 is convex surface, its Surface, image side 212 is concave surface, and is all aspheric surface.Furthermore, the thing side surface 211 of the first lens 210 It can be the surface in optical lens group with maximum curvature.

Second lens 220 have negative refracting power, and are plastic cement material, and its thing side surface 221 is convex surface, its Surface, image side 222 is concave surface, and is all aspheric surface.Additionally, the surface, image side 222 of the second lens 220 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 212 and second of the first lens 210 is saturating The thing side surface 221 of mirror 220 is the surface in optical lens group with minimum curvature.

3rd lens 230 have positive refracting power, and are plastic cement material, and its thing side surface 231 is concave surface, its Surface, image side 232 is convex surface, and is all aspheric surface.Additionally, the thing side surface 231 of the 3rd lens 230 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 240, and it is arranged at the 3rd lens 230 and imaging surface 250 Between and do not affect the focal length of optical lens group.

Coordinate with reference to lower list three and table four.

In second embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table three and table four can extrapolate following data:

<the 3rd embodiment>

Refer to Fig. 5 and Fig. 6, wherein Fig. 5 illustrates a kind of image-taking device according to third embodiment of the invention Schematic diagram, Fig. 6 be sequentially from left to right the spherical aberration of the second embodiment, astigmatism and distort curve chart.By scheming 5 understand, and the image-taking device of the 3rd embodiment comprises optical lens group (not another label) and sense electronics optical element 360.Optical lens group is sequentially comprised the first lens 310, aperture the 300, second lens by thing side to image side 320, the 3rd lens 330, infrared ray filter optical filter 340 and imaging surface 350, sense electronics optical element 360 imaging surfaces 350 being arranged at optical photography battery of lens；Wherein, optical lens group has refracting power Lens are three (310-330), and the first lens 310 to the 3rd lens 330 are the independent saturating of three non-bondings Mirror.

First lens 310 have positive refracting power, and are plastic cement material, and its thing side surface 311 is convex surface, its Surface, image side 312 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 311 of the first lens 310 It can be the surface in optical lens group with maximum curvature.

Second lens 320 have negative refracting power, and are plastic cement material, and its thing side surface 321 is concave surface, its Surface, image side 322 is concave surface, and is all aspheric surface.Additionally, the surface, image side 322 of the second lens 320 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 312 and second of the first lens 310 is saturating The thing side surface 321 of mirror 320 is the surface in optical lens group with minimum curvature.

3rd lens 330 have negative refracting power, and are plastic cement material, and its thing side surface 331 is concave surface, its Surface, image side 332 is convex surface, and is all aspheric surface.Additionally, the thing side surface 331 of the 3rd lens 330 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 340, and it is arranged at the 3rd lens 330 and imaging surface 350 Between and do not affect the focal length of optical lens group.

Coordinate with reference to lower list five and table six.

In 3rd embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table five and table six can extrapolate following data:

<the 4th embodiment>

Refer to Fig. 7 and Fig. 8, wherein Fig. 7 illustrates a kind of image-taking device according to fourth embodiment of the invention Schematic diagram, Fig. 8 be sequentially from left to right the spherical aberration of the 4th embodiment, astigmatism and distort curve chart.By scheming 7 understand, and the image-taking device of the 4th embodiment comprises optical lens group (not another label) and sense electronics optical element 460.Optical lens group is sequentially comprised aperture the 400, first lens the 410, second lens by thing side to image side 420, the 3rd lens 430, infrared ray filter optical filter 440 and imaging surface 450, sense electronics optical element 460 imaging surfaces 450 being arranged at optical lens group；Wherein, optical lens group has the lens of refracting power It is three (410-430), and the first lens 410 are to the separate lenses that the 3rd lens 430 are three non-bondings.

First lens 410 have positive refracting power, and it is plastic cement material, and its thing side surface 411 is convex surface, its Surface, image side 412 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 411 of the first lens 410 It can be the surface in optical lens group with maximum curvature.

Second lens 420 have negative refracting power, and it is plastic cement material, and its thing side surface 421 is concave surface, its Surface, image side 422 is concave surface, and is all aspheric surface.Additionally, the surface, image side 422 of the second lens 420 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 412 and second of the first lens 410 is saturating The thing side surface 421 of mirror 420 is the surface in optical lens group with minimum curvature.

3rd lens 430 have negative refracting power, and it is plastic cement material, and its thing side surface 431 is concave surface, its Surface, image side 432 is convex surface, and is all aspheric surface.Additionally, the thing side surface 431 of the 3rd lens 430 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 440, and it is arranged at the 3rd lens 430 and imaging surface 450 Between and do not affect the focal length of optical lens group.

Coordinate with reference to lower list seven and table eight.

In 4th embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table seven and table eight can extrapolate following data:

<the 5th embodiment>

Refer to Fig. 9 and Figure 10, wherein Fig. 9 illustrates and fills according to a kind of capture of fifth embodiment of the invention The schematic diagram put, Figure 10 is sequentially the spherical aberration of the 5th embodiment, astigmatism from left to right and distorts curve chart. As shown in Figure 9, the image-taking device of the 5th embodiment comprises optical lens group (not another label) and electronics is photosensitive Element 560.Optical photography battery of lens by thing side to image side sequentially comprise aperture the 500, first lens 510, Second lens the 520, the 3rd lens 530, infrared ray filter optical filter 540 and imaging surface 550, electronics Photo-sensitive cell 560 is arranged at the imaging surface 550 of optical photography battery of lens；Wherein, optical lens group has The lens of refracting power are three (510-530), and the first lens 510 are three non-bondings to the 3rd lens 530 Separate lenses.

First lens 510 have positive refracting power, and it is plastic cement material, and its thing side surface 511 is convex surface, its Surface, image side 512 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 511 of the first lens 510 It can be the surface in optical lens group with maximum curvature.

Second lens 520 have negative refracting power, and it is plastic cement material, and its thing side surface 521 is concave surface, its Surface, image side 522 is concave surface, and is all aspheric surface.Additionally, the surface, image side 522 of the second lens 520 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 512 and second of the first lens 510 is saturating The thing side surface 521 of mirror 520 is the surface in optical lens group with minimum curvature.

3rd lens 530 have negative refracting power, and it is plastic cement material, and its thing side surface 531 is concave surface, its Surface, image side 532 is convex surface, and is all aspheric surface.Additionally, the thing side surface 531 of the 3rd lens 530 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 540, and it is arranged at the 3rd lens 530 and imaging surface 550 Between and do not affect the focal length of optical lens group.

Coordinate with reference to lower list nine and table ten.

In 5th embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table nine and table ten can extrapolate following data:

<sixth embodiment>

Refer to Figure 11 and Figure 12, wherein Figure 11 illustrates a kind of capture according to sixth embodiment of the invention The schematic diagram of device, Figure 12 is sequentially the spherical aberration of sixth embodiment, astigmatism from left to right and distorts curve chart. As shown in Figure 11, the image-taking device of sixth embodiment comprises optical lens group (not another label) and sense electronics Optical element 660.Optical lens group by thing side to image side sequentially comprise the first lens 610, aperture 600, Two lens the 620, the 3rd lens 630, infrared ray filter optical filter 640 and imaging surface 650, sense electronics Optical element 660 is arranged at the imaging surface 650 of optical photography battery of lens；Wherein, optical lens group has in the wrong The lens of folding power are three (610-630), and the first lens 610 are three non-bondings to the 3rd lens 630 Separate lenses.

First lens 610 have positive refracting power, and it is plastic cement material, and its thing side surface 611 is convex surface, its Surface, image side 612 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 611 of the first lens 610 It can be the surface in optical lens group with maximum curvature.

Second lens 620 have negative refracting power, and it is plastic cement material, and its thing side surface 621 is concave surface, its Surface, image side 622 is concave surface, and is all aspheric surface.Additionally, the surface, image side 622 of the second lens 620 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 612 and second of the first lens 610 is saturating The thing side surface 621 of mirror 620 is the surface in optical lens group with minimum curvature.

3rd lens 630 have negative refracting power, and it is plastic cement material, and its thing side surface 631 is concave surface, its Surface, image side 632 is convex surface, and is all aspheric surface.Additionally, the thing side surface 631 of the 3rd lens 630 Curvature be gradually increased by its paraxial to off-axis place.

It is plastic cement material that infrared ray filters optical filter 640, and it is arranged at the 3rd lens 630 and imaging surface 650 Between and do not affect the focal length of optical lens group.

Coordinate with reference to lower list 11 and table 12.

In sixth embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 11 and table 12 can extrapolate following data:

<the 7th embodiment>

Refer to Figure 13 and Figure 14, wherein Figure 13 illustrates a kind of capture according to seventh embodiment of the invention The schematic diagram of device, Figure 14 is sequentially the spherical aberration of the 7th embodiment, astigmatism from left to right and distorts curve chart. As shown in Figure 13, the image-taking device of the 7th embodiment comprises optical lens group (not another label) and sense electronics Optical element 760.Optical lens group by thing side to image side sequentially comprise aperture the 700, first lens 710, Two lens the 720, the 3rd lens 730, infrared ray filter optical filter 740 and imaging surface 750, sense electronics Optical element 760 is arranged at the imaging surface 750 of optical lens group；Wherein, optical lens group has refracting power Lens be three (710-730), and the first lens 710 are to the independence that the 3rd lens 730 are three non-bondings Lens.

First lens 710 have positive refracting power, and it is plastic cement material, and its thing side surface 711 is convex surface, its Surface, image side 712 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 711 of the first lens 710 It can be the surface in optical lens group with maximum curvature.

Second lens 720 have negative refracting power, and it is plastic cement material, and its thing side surface 721 is concave surface, its Surface, image side 722 is concave surface, and is all aspheric surface.Additionally, the surface, image side 722 of the second lens 720 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 712 and second of the first lens 710 is saturating The thing side surface 721 of mirror 720 is the surface in optical lens group with minimum curvature.

3rd lens 730 have negative refracting power, and it is plastic cement material, and its thing side surface 731 is concave surface, its Surface, image side 732 is convex surface, and is all aspheric surface.Additionally, the thing side surface 731 of the 3rd lens 730 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 740, and it is arranged at the 3rd lens 730 and imaging surface 750 Between and do not affect the focal length of optical lens group.

Coordinate with reference to lower list 13 and table 14.

In 7th embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 13 and table 14 can extrapolate following data:

<the 8th embodiment>

Refer to Figure 15 and Figure 16, wherein Figure 15 illustrates a kind of capture according to eighth embodiment of the invention The schematic diagram of device, Figure 16 is sequentially the spherical aberration of the 8th embodiment, astigmatism from left to right and distorts curve chart. As shown in Figure 15, the image-taking device of the 8th embodiment comprises optical lens group (not another label) and sense electronics Optical element 860.Optical lens group by thing side to image side sequentially comprise aperture the 800, first lens 810, Two lens the 820, the 3rd lens 830, infrared ray filter optical filter 840 and imaging surface 850, sense electronics Optical element 860 is arranged at the imaging surface 850 of optical lens group；Wherein, optical lens group has refracting power Lens be three (810-830), and the first lens 810 are to the independence that the 3rd lens 830 are three non-bondings Lens.

First lens 810 have positive refracting power, and it is plastic cement material, and its thing side surface 811 is convex surface, its Surface, image side 812 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 811 of the first lens 810 It can be the surface in optical lens group with maximum curvature.

Second lens 820 have negative refracting power, and it is plastic cement material, and its thing side surface 821 is concave surface, its Surface, image side 822 is concave surface, and is all aspheric surface.Additionally, the surface, image side 822 of the second lens 820 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 812 and second of the first lens 810 is saturating The thing side surface 821 of mirror 820 is the surface in optical lens group with minimum curvature.

3rd lens 830 have negative refracting power, and it is plastic cement material, and its thing side surface 831 is concave surface, its Surface, image side 832 is convex surface, and is all aspheric surface.Additionally, the thing side surface 831 of the 3rd lens 830 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 840, and it is arranged at the 3rd lens 830 and imaging surface 850 Between and do not affect the focal length of optical lens group.

Coordinate again with reference to lower list 15 and table 16.

In 8th embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 15 and table 16 can extrapolate following data:

<the 9th embodiment>

Refer to Figure 17 and Figure 18, wherein Figure 17 illustrates a kind of capture according to ninth embodiment of the invention The schematic diagram of device, Figure 18 is sequentially the spherical aberration of the 9th embodiment, astigmatism from left to right and distorts curve chart. As shown in Figure 17, the image-taking device of the 9th embodiment comprises optical lens group (not another label) and sense electronics Optical element 960.Optical lens group by thing side to image side sequentially comprise aperture the 900, first lens 910, Two lens the 920, the 3rd lens 930, infrared ray filter optical filter 940 and imaging surface 950, sense electronics Optical element 960 is arranged at the imaging surface 950 of optical lens group；Wherein, optical lens group has refracting power Lens be three (910-930), and the first lens 910 are to the independence that the 3rd lens 930 are three non-bondings Lens.

First lens 910 have positive refracting power, and it is plastic cement material, and its thing side surface 911 is convex surface, its Surface, image side 912 is convex surface, and is all aspheric surface.Furthermore, the thing side surface 911 of the first lens 910 It can be the surface in optical lens group with maximum curvature.

Second lens 920 have negative refracting power, and it is plastic cement material, and its thing side surface 921 is concave surface, its Surface, image side 922 is concave surface, and is all aspheric surface.Additionally, the surface, image side 922 of the second lens 920 Curvature be gradually increased by paraxial to off-axis place, and the surface, image side 912 and second of the first lens 910 is saturating The thing side surface 921 of mirror 920 is the surface in optical lens group with minimum curvature.

3rd lens 930 have negative refracting power, and it is plastic cement material, and its thing side surface 931 is concave surface, its Surface, image side 932 is convex surface, and is all aspheric surface.Additionally, the thing side surface 931 of the 3rd lens 930 Curvature be gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 940, and it is arranged at the 3rd lens 930 and imaging surface 950 Between and do not affect the focal length of optical lens group.

Coordinate again with reference to lower list 17 and table 18.

In 9th embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 17 and table 18 can extrapolate following data:

<the tenth embodiment>

Refer to Figure 19 and Figure 20, wherein Figure 19 illustrates a kind of capture according to tenth embodiment of the invention The schematic diagram of device, Figure 20 is sequentially the spherical aberration of the tenth embodiment, astigmatism from left to right and distorts curve chart. It appears from figure 19 that the image-taking device of the tenth embodiment comprises optical lens group (not another label) and sense electronics Optical element 1060.Optical lens group by thing side to image side sequentially comprise aperture the 1000, first lens 1010, Second lens the 1020, the 3rd lens 1030, infrared ray filter optical filter 1040 and imaging surface 1050, Sense electronics optical element 1060 is arranged at the imaging surface 1050 of optical lens group；Wherein, optical lens group has The lens having refracting power are three (1010-1030), and the first lens 1010 are three to the 3rd lens 1030 The separate lenses of non-bonding.

First lens 1010 have positive refracting power, and it is plastic cement material, and its thing side surface 1011 is convex surface, Its surface, image side 1012 is convex surface, and is all aspheric surface.Furthermore, the thing side surface of the first lens 1010 1011 can be the surface in optical lens group with maximum curvature.

Second lens 1020 have negative refracting power, and it is plastic cement material, and its thing side surface 1021 is concave surface, Its surface, image side 1022 is concave surface, and is all aspheric surface.Additionally, the surface, image side of the second lens 1020 The curvature of 1022 is gradually increased by paraxial to off-axis place, and the surface, image side 1012 of the first lens 1010 And second the thing side surface 1021 of lens 1020 be the surface in optical lens group with minimum curvature.

3rd lens 1030 have negative refracting power, and it is plastic cement material, and its thing side surface 1031 is concave surface, Its surface, image side 1032 is convex surface, and is all aspheric surface.Additionally, the thing side surface of the 3rd lens 1030 The curvature of 1031 is gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 1040, and it is arranged at the 3rd lens 1030 and imaging surface Between 1050 and do not affect the focal length of optical lens group.

Coordinate again with reference to lower list 19 and table 20.

In tenth embodiment, aspheric fitting equation represents the form such as first embodiment.Under additionally, The definition of table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 19 and table 20 can extrapolate following data:

<the 11st embodiment>

Refer to Figure 21 and Figure 22, wherein Figure 21 illustrates and takes according to the one of eleventh embodiment of the invention As the schematic diagram of device, Figure 22 is sequentially the spherical aberration of the 11st embodiment, astigmatism from left to right and distorts song Line chart.As shown in Figure 21, the image-taking device of the 11st embodiment comprise optical lens group (another label) with And sense electronics optical element 1160.Optical lens group is sequentially comprised the first lens 1110, light by thing side to image side Circle the 1100, second lens the 1120, the 3rd lens 1130, infrared ray filter optical filter 1140 and imaging Face 1150, sense electronics optical element 1160 is arranged at the imaging surface 1150 of optical lens group；Wherein, optical lens The lens in mirror group with refracting power are three (1110-1130), and the first lens 1110 are to the 3rd lens 1130 is the separate lenses of three non-bondings.

First lens 1110 have positive refracting power, and it is plastic cement material, and its thing side surface 1111 is convex surface, Its surface, image side 1112 is convex surface, and is all aspheric surface.Furthermore, the thing side surface of the first lens 1110 1111 can be the surface in optical lens group with maximum curvature.

Second lens 1120 have negative refracting power, and it is plastic cement material, and its thing side surface 1121 is concave surface, Its surface, image side 1122 is concave surface, and is all aspheric surface.Additionally, the surface, image side of the second lens 1120 The curvature of 1122 is gradually increased by paraxial to off-axis place, and the surface, image side 1112 of the first lens 1110 And second the thing side surface 1121 of lens 1120 be the surface in optical lens group with minimum curvature.

3rd lens 1130 have negative refracting power, and it is plastic cement material, and its thing side surface 1131 is concave surface, Its surface, image side 1132 is concave surface, and is all aspheric surface.Additionally, the thing side surface of the 3rd lens 1130 The curvature of 1131 is gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 1140, and it is arranged at the 3rd lens 1130 and imaging surface Between 1150 and do not affect the focal length of optical lens group.

Coordinate again with reference to lower list 21 and table 22.

In 11st embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, The definition of following table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 21 and table 22 can extrapolate following data:

<the 12nd embodiment>

Refer to Figure 23 and Figure 24, wherein Figure 23 illustrates and takes according to the one of twelveth embodiment of the invention As the schematic diagram of device, Figure 24 is sequentially the spherical aberration of the 12nd embodiment, astigmatism from left to right and distorts song Line chart.As shown in Figure 23, the image-taking device of the 12nd embodiment comprise optical lens group (another label) with And sense electronics optical element 1260.It is saturating that optical lens group is sequentially comprised aperture 1200, first by thing side to image side Mirror the 1210, second lens the 1220, the 3rd lens 1230, infrared ray filter optical filter 1240 and imaging Face 1250, sense electronics optical element 1260 is arranged at the imaging surface of optical lens group；Wherein, optical lens group In to have the lens of refracting power be three (1210-1230), and the first lens 1210 are to the 3rd lens 1230 It it is the separate lenses of three non-bondings.

First lens 1210 have positive refracting power, and it is plastic cement material, and its thing side surface 1211 is convex surface, Its surface, image side 1212 is concave surface, and is all aspheric surface.Furthermore, the thing side surface of the first lens 1210 1211 can be the surface in optical lens group with maximum curvature.

Second lens 1220 have negative refracting power, and it is plastic cement material, and its thing side surface 1221 is convex surface, Its surface, image side 1222 is concave surface, and is all aspheric surface.Additionally, the surface, image side of the second lens 1220 The curvature of 1222 is gradually increased by paraxial to off-axis place, and the surface, image side 1212 of the first lens 1210 And second the thing side surface 1221 of lens 1220 be the surface in optical lens group with minimum curvature.

3rd lens tool 1230 has positive refracting power, and it is plastic cement material, and its thing side surface 1231 is concave surface, Its surface, image side 1232 is convex surface, and is all aspheric surface.Additionally, the thing side surface of the 3rd lens 1230 The curvature of 1231 is gradually increased by its paraxial to off-axis place.

It is glass material that infrared ray filters optical filter 1240, and it is arranged at the 3rd lens 1230 and imaging surface Between 1250 and do not affect the focal length of optical lens group.

Coordinate again with reference to lower list 23 and table 24.

In 12nd embodiment, aspheric fitting equation represents the form such as first embodiment.Additionally, The definition of following table parameter is all identical with first embodiment, and not in this to go forth.

Cooperation table 23 and table 24 can extrapolate following data:

<the 13rd embodiment>

Refer to Figure 25, illustrate the light path schematic diagram of a kind of image-taking device of thriteenth embodiment of the invention. The image-taking device of the 13rd embodiment comprises the optical lens group (not another label) according to the present invention and electronics Photo-sensitive cell 160.To be illustrated, in fig. 25, optical lens group and sense electronics optical element 160 It is using the optical lens group depicted in first embodiment and sense electronics optical element 160 as declared range, that is The element numbers of the optical lens group depicted in Figure 25 is same as the optical lens group of first embodiment；So exist During actual enforcement, optical lens group and sense electronics optical element can also be that the second embodiment is to the 12nd embodiment In arbitrary groups of optical lens group and sense electronics optical element.

Optical lens group is arranged between object 20 and sense electronics optical element 160, sense electronics optical element 160 It is arranged at the imaging surface 150 of optical lens group.Optical lens group in order to by the video imaging of object 20 in It is arranged on the sense electronics optical element 160 of imaging surface 150.

<the 14th embodiment>

Refer to Figure 26, illustrate the light path schematic diagram of a kind of image-taking device of fourteenth embodiment of the invention. It is photosensitive that the image-taking device of the 14th embodiment comprises optical lens group (not another label), prism 21 and an electronics Element 160.To be illustrated, in fig. 26, optical lens group and sense electronics optical element are with Optical lens group depicted in one embodiment and sense electronics optical element are as declared range, that is Figure 26 is painted The optical lens group shown and the element numbers of sense electronics optical element are same as the optical lens group of first embodiment And sense electronics optical element；So when reality is implemented, optical lens group and sense electronics optical element can also be second Embodiment is to arbitrary groups of optical lens group and sense electronics optical element in the 12nd embodiment.

Optical lens group is arranged between object 20 and sense electronics optical element 160, and sense electronics optical element 160 imaging surfaces 150 being arranged at optical lens group, prism 21 is arranged at object 20 and optical lens group Between.Optical lens group is in order to make object 20 video imaging in the sense electronics optical element being positioned at imaging surface 150 160, prism 21, in order to make the light path of image-taking device turn to, so as to reducing image-taking device height, makes space join Put more flexible, especially with being equipped on thinned electronic.

Although the present invention is disclosed above with embodiment, so it is not limited to the present invention, any is familiar with This those skilled in the art, or else departs from the spirit and scope of the present invention, when doing various changes and retouching, therefore Protection scope of the present invention ought regard appended applying for a patent and instead be as the criterion by the person of being defined.

Claims (28)

1. an optical lens group, it is characterised in that sequentially comprised to image side by thing side:

One first lens, have positive refracting power, and its thing side surface is convex surface, and its thing side surface and image side table Face all aspheric surfaces；

One second lens, have negative refracting power, and its surface, image side is concave surface, and its thing side surface and image side table Face all aspheric surfaces；

One the 3rd lens, have refracting power, and its thing side surface is concave surface, and its thing side surface and surface, image side All aspheric surfaces；And

One aperture, without tool refracting power lens between this aperture and this first lens；

Wherein, the lens having refracting power in this optical lens group are three, and the focal length of this optical lens group is f, The radius of curvature on this surface, the second lens image side is R4, and the radius of curvature of the 3rd lens thing side surface is R5, This aperture is SD to the 3rd surface, lens image side distance on optical axis, and this first lens thing side surface is to being somebody's turn to do 3rd surface, lens image side distance on optical axis is TD, and it meets following condition:

1.25<f/R4；

-1.0<R5/f<0；And

0.6<SD/TD<1.0。

Optical lens group the most according to claim 1, it is characterised in that the 3rd lens image side table Face is convex surface.

Optical lens group the most according to claim 1, it is characterised in that this first lens thing side table The radius of curvature in face is R1, and the focal length of this optical lens group is f, and it meets following condition:

0<R1/f<0.40。

Optical lens group the most according to claim 1, it is characterised in that Jiao of this optical lens group Away from for f, the radius on this surface, the second lens image side is R4, and it meets following condition:

1.65<f/R4<6.0。

Optical lens group the most according to claim 1, it is characterised in that these first lens to this Three lens are three independence non-bonding lens, these first lens and this second lens spacing distance on optical axis For T12, these second lens and the 3rd lens spacing distance on optical axis are T23, and it meets following bar Part:

0<T12/T23<1.0。

Optical lens group the most according to claim 5, it is characterised in that these first lens with this Two lens spacing distance on optical axis is T12, these second lens and the 3rd lens interval on optical axis Distance is T23, and it meets following condition:

0<T12/T23<0.50。

Optical lens group the most according to claim 1, it is characterised in that Jiao of this optical lens group Away from for f, the maximum image height of this optical lens group is ImgH, and it meets following condition:

2.3<f/ImgH<4.5。

Optical lens group the most according to claim 1, it is characterised in that Jiao of this optical lens group Away from for f, the focal length of these the first lens is f1, and the focal length of these the second lens is f2, and it meets following condition:

3.65<|f/f1|+|f/f2|<6.0。

Optical lens group the most according to claim 1, it is characterised in that this second lens image side table The curvature in face is gradually increased by paraxial to off-axis place.

Optical lens group the most according to claim 3, it is characterised in that the thing side of these the first lens Surface is the surface in this optical lens group with maximum curvature, the surface, image side of these the first lens and this second The thing side surface of lens is the surface in this optical lens group with minimum curvature.

11. 1 kinds of image-taking devices, include the optical lens group described in claim 1 and the photosensitive unit of an electronics Part.

12. 1 kinds of image-taking devices, include the optical lens group described in claim 1, a prism and an electricity Sub-photo-sensitive cell.

13. 1 kinds of optical lens group, it is characterised in that sequentially comprised to image side by thing side:

One first lens, have positive refracting power, and its thing side surface is convex surface, its thing side surface and surface, image side All aspheric surfaces；

One second lens, have negative refracting power, and its surface, image side is concave surface, its thing side surface and surface, image side All aspheric surfaces；And

One the 3rd lens, have negative refracting power, and its thing side surface is concave surface, its thing side surface and surface, image side All aspheric surfaces；

Wherein, the lens having refracting power in this optical lens group are three, and these first lens are saturating to the 3rd Mirror is three independence non-bonding lens, and the focal length of this optical lens group is f, this surface, the second lens image side Radius of curvature is R4, and the radius of curvature of the 3rd lens thing side surface is R5, and it meets following condition:

1.25<f/R4；

-2.6<R5/f<0。

14. optical lens group according to claim 13, it is characterised in that the 3rd lens image side Surface is convex surface, and this optical lens group further includes between an aperture, and this aperture and this first lens without tool flexion The lens of power.

15. optical lens group according to claim 13, it is characterised in that these first lens with should Second lens spacing distance on optical axis is T12, and this second lens thickness on optical axis is CT2, its Meet following condition:

0<T12/CT2<0.80。

16. optical lens group according to claim 15, it is characterised in that this first lens image side The radius of curvature on surface is R2, and the radius of curvature of this second lens thing side surface is R3, and it meets following bar Part:

0.5<|(R2+R3)/(R2-R3)|<20。

17. optical lens group according to claim 13, it is characterised in that in this optical lens group The half at maximum visual angle is HFOV, and it meets following condition:

7.5 degree < HFOV < 23.5 degree.

18. optical lens group according to claim 13, it is characterised in that these first lens are in light Thickness on axle is CT1, and this second lens thickness on optical axis is CT2, and it meets following condition:

0<CT1/CT2<1.65。

19. optical lens group according to claim 18, it is characterised in that these first lens are in light Thickness on axle is CT1, and this second lens thickness on optical axis is CT2, and it meets following condition:

0<CT1/CT2<1.00。

20. optical lens group according to claim 13, it is characterised in that this first lens thing side Surface to the 3rd surface, lens image side distance on optical axis is TD, and the focal length of this optical lens group is f, It meets following condition:

0.50<TD/f<0.90。

21. optical lens group according to claim 13, it is characterised in that the 3rd lens thing side surface Curvature be gradually increased by paraxial to off-axis place.

22. 1 kinds of optical lens group, it is characterised in that sequentially comprised to image side by thing side:

One first lens, have positive refracting power, and its thing side surface is convex surface, its thing side surface and surface, image side All aspheric surfaces；

One second lens, have negative refracting power, and its surface, image side is concave surface, its thing side surface and surface, image side All aspheric surfaces；And

One the 3rd lens, have refracting power, and its thing side surface is concave surface, and its thing side surface and surface, image side are all Aspheric surface；

Wherein, it is three that this optical lens group has the lens of refracting power, and the focal length of this optical lens group is f, The radius of curvature on this surface, the second lens image side is R4, and the radius of curvature of the 3rd lens thing side surface is R5, The abbe number of these the first lens is V1, and the abbe number of these the second lens is V2, the color of the 3rd lens Scattered coefficient is V3, and it meets following condition:

0.50<f/R4；

-2.6<R5/f<0；And

(V2+V3)/V1<1.0。

23. optical lens group according to claim 22, it is characterised in that these first lens are in light Thickness on axle is CT1, and this second lens thickness on optical axis is CT2, and the 3rd lens are on optical axis Thickness be CT3, it meets following condition:

1.30<(CT2+CT3)/CT1。

24. optical lens group according to claim 22, it is characterised in that these first lens, should The material of the second lens and the 3rd lens is plastic cement, this first lens thing side surface to an imaging surface in optical axis On distance be TL, the maximum image height of this optical lens group is ImgH, and it meets following condition:

2.0<TL/ImgH<3.5。

25. optical lens group according to claim 22, it is characterised in that this second lens thing side The radius of curvature on surface is R3, and the radius of curvature on this surface, the second lens image side is R4, and it meets following bar Part:

0.3<(R3+R4)/(R3-R4)<2.5。

26. optical lens group according to claim 22, it is characterised in that this optical lens group The a diameter of EPD of entrance pupil, the maximum image height of this optical lens group is ImgH, and it meets following condition:

0.90<EPD/ImgH<1.7。

27. optical lens group according to claim 22, it is characterised in that this optical lens group Focal length is f, and the focal length of these the first lens is f1, and the focal length of these the second lens is f2, and it meets following condition:

3.0<|f/f1|+|f/f2|<6.0。

28. optical lens group according to claim 22, it is characterised in that these first lens are to being somebody's turn to do 3rd lens are three independence non-bonding lens, and the 3rd surface, lens image side is convex surface, this optical lens group Further include an aperture, without the lens of tool refracting power between this aperture and this first lens.