CN102466858B - Wide-viewing angle taking lens group - Google Patents

Abstract

The invention discloses a wide-viewing angle taking lens group, which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens sequentially from an object side to an image side, wherein the first lens has negative refractive power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative refractive power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive refractive power; the fourth lens has negative refractive power, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive refractive power; the first and second lenses with the refractive power in the wide-viewing angel taking lens group are the closest to the object side; and the wide-viewing angle taking lens group at most comprises six lenses with refractive power.

Description

Wide-viewing angle taking lens group

Technical field

The present invention relates to a kind of wide-viewing angle taking lens group, particularly about a kind of, have with great visual angle and the wide-viewing angle taking lens group of miniaturization.

Background technology

In recent years, because the range of application of optical camera lens is more and more extensive, particularly at mobile phone camera, computer network camera, automobile-used camera lens, the industries such as safe imaging monitoring and electronic entertainment, and the photo-sensitive cell of general pick-up lens is nothing more than being sensitization coupling element (Charge Coupled Device, CCD) or CMOS element (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor) two kinds, and due to progressing greatly of manufacturing process technology, the elemental area of photo-sensitive cell is dwindled, pick-up lens is gradually toward high pixel and the development of miniaturization field, therefore, the requirement of image quality is also increased day by day.

Generally be applied to the pick-up lens of the aspects such as automobile, imaging monitoring and electronic amusement device, because considering the image characteristics that needs single acquisition extensive area, the required field angle of its camera lens is larger.Existing pick-up lens with great visual angle, adopt the configuration mode that pre-group lens are positive refracting power for negative refracting power, rear group's lens more, form so-called anti-photography type (Inverse Telephoto) structure, obtain by this characteristic of Wide-angle, as United States Patent (USP) the 7th, 446, shown in No. 955, for adopting the four-piece type lens arrangement of the negative refracting power of pre-group, the positive refracting power of rear group, lens configuration form even so can obtain larger field angle, but because rear group only configures a slice lens, be difficult to system aberration to do good revisal.Moreover, automobile is equipped with the universal of reverse image device in recent years, the wide-viewing angle taking lens group that is equipped with high-res has become a kind of trend, be therefore badly in need of a kind of possess have Wide-angle and high image quality, and be unlikely to the wide-viewing angle taking lens group that makes camera lens total length long.

Summary of the invention

The invention provides a kind of wide-viewing angle taking lens group, by thing side, extremely as side, sequentially comprised: the first lens of the negative refracting power of a tool, its thing side surface is convex surface and is concave surface as side surface; The second lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface; The 3rd lens of the positive refracting power of one tool; The 4th lens of the negative refracting power of one tool, it is concave surface as side surface; And the 5th lens of the positive refracting power of a tool; Wherein, in this wide-viewing angle taking lens group, two pieces of tool refracting power lens of the most close thing side are this first lens and this second lens, and in this wide-viewing angle taking lens group, the lens of tool refracting power are no more than six pieces; The focal length of this first lens is f1, the focal length of these the second lens is f2, these second lens and the distance of the 3rd lens on optical axis are T23, this first lens and the distance of these the second lens on optical axis are T12, the 4th lens as side surface radius-of-curvature, be R8, the thing side surface radius-of-curvature of the 4th lens is R7, the focal length of whole wide-viewing angle taking lens group is f, one sense electronics optical element is wherein separately set for object imaging in this wide-viewing angle taking lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

0＜f1/f2＜2.00：

0.15＜T23/T12＜0.69；

-1.40 < R8/R7 < 0.70; And

0.30＜f/ImgH＜1.25。

On the other hand, the invention provides a kind of wide-viewing angle taking lens group, by thing side, extremely as side, sequentially comprised: the first lens of the negative refracting power of a tool, it is concave surface as side surface; The second lens of the negative refracting power of one tool, it is concave surface as side surface; The 3rd lens of the positive refracting power of one tool; The 4th lens of the negative refracting power of one tool; And the 5th lens of the positive refracting power of a tool; Wherein, in this wide-viewing angle taking lens group, be separately provided with an aperture between these second lens and the 4th lens; Wherein, in this wide-viewing angle taking lens group, two pieces of tool refracting power lens of the most close thing side are this first lens and this second lens, and in this wide-viewing angle taking lens group, the lens of tool refracting power are no more than six pieces; The focal length of this first lens is f1, the focal length of these the second lens is f2, one sense electronics optical element is wherein separately set for object imaging in this wide-viewing angle taking lens group, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of this first lens to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

0＜f1/f2＜2.00；

0.20 < SL/TTL < 0.85; And

TTL/ImgH＜8.6。

Again on the other hand, the invention provides a kind of wide-viewing angle taking lens group, by thing side, extremely as side, sequentially comprised: the first lens of the negative refracting power of a tool, it is concave surface as side surface; The second lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface; The 3rd lens of the positive refracting power of one tool; The 4th lens of the negative refracting power of one tool, it is concave surface as side surface; And the 5th lens of the positive refracting power of a tool; Wherein, in this wide-viewing angle taking lens group, the lens of tool refracting power are five pieces; The thickness of the 4th lens on optical axis is CT4, the 4th lens as side surface radius-of-curvature, be R8, the focal length of whole wide-viewing angle taking lens group is f, one sense electronics optical element is wherein separately set for object imaging in this wide-viewing angle taking lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

0 < CT4/R8 < 0.70; And

0.30＜f/ImgH＜1.25。

The present invention, by above-mentioned mirror group configuration mode, can provide the field angle of system tool abundance, reduces the susceptibility of system, and obtains good image quality.

In wide-viewing angle taking lens group of the present invention, this first lens and this second lens are the negative refracting power of tool all, and it is concave surface as side surface, is conducive to expand the field angle of system, and by two pieces of negative lenses, distribute mutually required negative refracting power, can contribute to reduce the excessive increase of system aberration.The positive refracting power of the 3rd lens tool, provides system required part refracting power, and contributes to revise this first lens of the negative refracting power of tool and the aberration that this second lens produce.The 4th lens tool is born refracting power, can be conducive to the aberration of update the system.The positive refracting power of the 5th lens tool, can effectively distribute the refracting power of the 3rd lens, contributes to reduce the susceptibility of system.

In wide-viewing angle taking lens group of the present invention, when the thing side surface of this first lens is convex surface and is concave surface as side surface, and the thing side surface of these the second lens is convex surface and while being concave surface as side surface, contribute to expand the field angle of system, and the refraction for incident ray comparatively relaxes, can avoid aberration excessively to increase, therefore be conducive to obtain good balance in expanding system field angle and revising aberration; When the 4th lens thing side surface is concave surface, can be conducive to the aberration of update the system, preferably, the thing side surface of the 4th lens and be all concave surface as side surface; When the thing side surface of the 5th lens and be all convex surface as side surface, can contribute to strengthen the positive refracting power of the 5th lens, be conducive to distribute the refracting power of the 3rd lens, to reduce the susceptibility of system; Wherein, preferably, the 4th lens can engage one another and become doublet (Doublet), the more effectively correction of strengthening system aberration with the 5th lens.In addition, in wide-viewing angle taking lens group of the present invention, preferably, more can include one the 6th lens, it can insert between wantonly two pieces of lens of these second lens and the 5th lens, more contributes to the higher order aberratons of update the system, makes system obtain higher image quality.

In wide-viewing angle taking lens group of the present invention, this aperture can be placed between these second lens and the 4th lens.In wide-angle optics, need to revise distortion (Distortion) and multiplying power look receipts poor (Chromatic Aberration of Magnification) especially, its method is for to be placed in system light flexion equilibrium of forces place by aperture, therefore wide-viewing angle taking lens group of the present invention is placed in aperture between these second lens and the 4th lens, its object is to utilize at least two pieces of negative lenses of configuration before aperture, make system obtain sufficient field angle, at least two pieces of lens of configuration are after aperture simultaneously, can make system aberration obtain good revisal, to obtain the characteristic of Wide-angle and high image quality, and so configuration mode can contribute to reduce the susceptibility of system.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, does not form limitation of the invention.In the accompanying drawings:

Figure 1A is the wide-viewing angle taking lens group schematic diagram of first embodiment of the invention.

Figure 1B is the aberration curve figure of first embodiment of the invention.

Fig. 2 A is the wide-viewing angle taking lens group schematic diagram of second embodiment of the invention.

Fig. 2 B is the aberration curve figure of second embodiment of the invention.

Fig. 3 A is the wide-viewing angle taking lens group schematic diagram of third embodiment of the invention.

Fig. 3 B is the aberration curve figure of third embodiment of the invention.

Fig. 4 A is the wide-viewing angle taking lens group schematic diagram of fourth embodiment of the invention.

Fig. 4 B is the aberration curve figure of fourth embodiment of the invention.

Fig. 5 A is the wide-viewing angle taking lens group schematic diagram of fifth embodiment of the invention.

Fig. 5 B is the aberration curve figure of fifth embodiment of the invention.

Fig. 6 A is the wide-viewing angle taking lens group schematic diagram of sixth embodiment of the invention.

Fig. 6 B is the aberration curve figure of sixth embodiment of the invention.

Fig. 7 A is the wide-viewing angle taking lens group schematic diagram of seventh embodiment of the invention.

Fig. 7 B is the aberration curve figure of seventh embodiment of the invention.

Fig. 8 A is the wide-viewing angle taking lens group schematic diagram of eighth embodiment of the invention.

Fig. 8 B is the aberration curve figure of eighth embodiment of the invention.

Fig. 9 A is the wide-viewing angle taking lens group schematic diagram of ninth embodiment of the invention.

Fig. 9 B is the aberration curve figure of ninth embodiment of the invention.

Figure 10 is table one, is the optical data of first embodiment of the invention.

Figure 11 is table two, is the aspherical surface data of first embodiment of the invention.

Figure 12 is table three, is the optical data of second embodiment of the invention.

Figure 13 is table four, is the aspherical surface data of second embodiment of the invention.

Figure 14 is table five, is the optical data of third embodiment of the invention.

Figure 15 is table six, is the aspherical surface data of third embodiment of the invention.

Figure 16 is table seven, is the optical data of fourth embodiment of the invention.

Figure 17 is table eight, is the aspherical surface data of fourth embodiment of the invention.

Figure 18 is table nine, is the optical data of fifth embodiment of the invention.

Figure 19 is table ten, is the aspherical surface data of fifth embodiment of the invention.

Figure 20 is table ten one, is the optical data of sixth embodiment of the invention.

Figure 21 is table ten two, is the aspherical surface data of sixth embodiment of the invention.

Figure 22 is table ten three, is the optical data of seventh embodiment of the invention.

Figure 23 is table ten four, is the aspherical surface data of seventh embodiment of the invention.

Figure 24 is table ten five, is the optical data of eighth embodiment of the invention.

Figure 25 is table ten six, is the aspherical surface data of eighth embodiment of the invention.

Figure 26 is table ten seven, is the optical data of ninth embodiment of the invention.

Figure 27 is table ten eight, is the numeric data of first embodiment of the invention to the nine embodiment correlationship formulas.

Drawing reference numeral:

Aperture 100,200,300,400,500,600,700,800,900

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

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

Picture side surface 112,212,312,412,512,612,712,812,912

The second lens 120,220,320,420,520,620,720,820,920

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

Picture side surface 122,222,322,422,522,622,722,822,922

The 3rd lens 130,230,330,430,530,630,730,830,930

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

Picture side surface 132,232,332,432,532,632,732,832,932

The 4th lens 140,240,340,440,540,640,740,840,940

Thing side surface 141,241,341,441,541,641,741,841,941

Picture side surface 142,242,342,442,542,642,742,842,942

The 5th lens 150,250,350,450,550,650,750,850,950

Thing side surface 151,251,351,451,551,651,751,851,951

Picture side surface 152,252,352,452,552,652,752,852,952

The 6th lens 860,960

Thing side surface 861,961

Picture side surface 862,962

Infrared ray filtering optical filter 160,260,360,460,560,660,760,870,970

Cover glass 270,570,880

Imaging surface 190,290,390,490,590,690,790,890,990

The focal length of whole wide-viewing angle taking lens group is f

The focal length of first lens is f1

The focal length of the second lens is f2

The f-number of whole wide-viewing angle taking lens group is Fno

In whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV

First lens abbe number is V1

The second lens abbe number is V2

The 4th lens are R8 as side surface radius-of-curvature

The 4th lens thing side surface radius-of-curvature is R7

First lens thing side surface radius-of-curvature is R1

First lens is R2 as side surface radius-of-curvature

The second lens and the distance of the 3rd lens on optical axis are T23

First lens and the distance of the second lens on optical axis are T12

The thickness of the 4th lens on optical axis is CT4

Half of sense electronics optical element effective pixel area diagonal line length is ImgH

Aperture to the distance of this sense electronics optical element on optical axis is SL

First lens thing side surface to the distance of sense electronics optical element on optical axis is TTL

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further details.At this, schematic description and description of the present invention is used for explaining the present invention, but not as a limitation of the invention.

The invention provides a kind of wide-viewing angle taking lens group, by thing side, extremely as side, sequentially comprised: the first lens of the negative refracting power of a tool, its thing side surface is convex surface and is concave surface as side surface; The second lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface; The 3rd lens of the positive refracting power of one tool; The 4th lens of the negative refracting power of one tool, it is concave surface as side surface; And the 5th lens of the positive refracting power of a tool; Wherein, in this wide-viewing angle taking lens group, two pieces of tool refracting power lens of the most close thing side are this first lens and this second lens; And in this wide-viewing angle taking lens group, the lens of tool refracting power are no more than six pieces; The focal length of this first lens is f1, the focal length of these the second lens is f2, these second lens and the distance of the 3rd lens on optical axis are T23, this first lens and the distance of these the second lens on optical axis are T12, the 4th lens as side surface radius-of-curvature, be R8, the thing side surface radius-of-curvature of the 4th lens is R7, the focal length of whole wide-viewing angle taking lens group is f, one sense electronics optical element is wherein separately set for object imaging in this wide-viewing angle taking lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

0＜f1/f2＜2.00；

0.15＜T23/T12＜0.69；

-1.40 < R8/R7 < 0.70; And

0.30＜f/ImgH＜1.25。

When aforementioned wide-viewing angle taking lens group meets following relationship: during 0 < f1/f2 < 2.00, the refracting power configuration of this first lens and these the second lens is comparatively suitable, can be conducive to obtain field angle widely and reduce the excessive increase of system aberration; Further, be preferably and meet following relationship: 0 < f1/f2 < 12.When aforementioned wide-viewing angle taking lens group meets following relationship: 0.15 < T23/T12 < 0.69, can make this first lens in this wide-viewing angle taking lens group comparatively suitable to the lens spacing distance configuration of the 3rd lens, can avoid distance too short and cause the difficulty in assembling, or distance is long and affect the miniaturization of camera lens.When aforementioned wide-viewing angle taking lens group meets following relationship :-1.40 < R8/R7 < 0.70, can make the 4th lens that sufficient negative refracting power is provided, be conducive to the aberration of update the system, with the resolving power of elevator system.When aforementioned wide-viewing angle taking lens group meets following relationship: 0.30 < f/ImgH < 125, can be conducive to guarantee that this wide-viewing angle taking lens group possesses and has sufficient field angle; Further, be preferably and meet following relationship: 0.40 < f/ImgH < 1.10.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, the thing side surface of the 5th lens and be convex surface as side surface, can contribute to strengthen the positive refracting power of the 5th lens, is conducive to distribute the refracting power of the 3rd lens, to reduce the susceptibility of system.

In the aforementioned wide-viewing angle taking lens group of the present invention, the thing side surface radius-of-curvature of this first lens is R1 and is R2 as side surface radius-of-curvature, preferably, be to meet following relationship: the < 3.00 of 1.03 < (R1+R2)/(R1-R2).When (R1+R2)/(R1-R2) meet above-mentioned relation formula, the lens shape that can effectively control this first lens is crescent, with favourable system, when expanding field angle, for the refraction of incident ray, comparatively relaxes, and can avoid aberration excessively to increase.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, these second lens have aspheric surface, and this second lens material is plastic cement.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, this wide-viewing angle taking lens group is separately provided with an aperture between these second lens and the 4th lens, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of this first lens to the distance of this sense electronics optical element on optical axis is TTL, meets following relationship: 0.30 < SL/TTL < 0.65.When SL/TTL meets above-mentioned relation formula, be conducive at shortening camera lens volume and expand between system field angle obtain good balance.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, in this wide-viewing angle taking lens group, at least comprise one piece of aspheric lens of tool, non-spherical lens can easily be made into the shape beyond sphere, obtain more controlled variable, in order to subdue aberration, and then reduce the number that lens use, and can effectively reduce the optics total length of wide-viewing angle taking lens group of the present invention.

In the aforementioned wide-viewing angle taking lens group of the present invention, the abbe number of this first lens (Abbe Number) is V1, the abbe number of these the second lens is V2, preferably, is to meet following relationship: 20 < V1-V2 < 50.When V1-V2 meets above-mentioned relation formula, contribute to promote the ability of this wide-viewing angle taking lens group correction aberration.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, in this wide-viewing angle taking lens group, the lens of tool refracting power are five pieces.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, the 4th lens as side surface, be concave surface, can be conducive to the aberration of update the system.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, the 4th lens engage one another and become doublet with the 5th lens, more effectively the correction of strengthening system aberration.

In the aforementioned wide-viewing angle taking lens group of the present invention, the thing side surface of this first lens to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, preferably, be to meet following relationship: TTL/ImgH < 8.6.Further, be preferably and meet following relationship: TTL/ImgH < 6.0.

On the other hand, the invention provides a kind of wide-viewing angle taking lens group, by thing side, extremely as side, sequentially comprised: the first lens of the negative refracting power of a tool, it is concave surface as side surface; The second lens of the negative refracting power of one tool, it is concave surface as side surface; The 3rd lens of the positive refracting power of one tool; The 4th lens of the negative refracting power of one tool; And the 5th lens of the positive refracting power of a tool; Wherein, in this wide-viewing angle taking lens group, be separately provided with an aperture between these second lens and the 4th lens; Wherein, in this wide-viewing angle taking lens group, two pieces of tool refracting power lens of the most close thing side are this first lens and this second lens; And in this wide-viewing angle taking lens group, the lens of tool refracting power are no more than six pieces; The focal length of this first lens is f1, the focal length of these the second lens is f2, one sense electronics optical element is wherein separately set for object imaging in this wide-viewing angle taking lens group, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of this first lens to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

0＜f1/f2＜2.00；

0.20 < SL/TTL < 0.85; And

TTL/ImgH＜8.6。

When aforementioned wide-viewing angle taking lens group meets following relationship: 0 < f1/f2 < 2.00, the refracting power configuration of this first lens and these the second lens is comparatively suitable, can be conducive to obtain field angle widely and reduce the excessive increase of system aberration; Further, be preferably and meet following relationship: 0 < f1/f2 < 1.2.When aforementioned wide-viewing angle taking lens group meets following relationship: 0.20 < SL/TTL < 0.85, is conducive at shortening camera lens volume and expands between system field angle obtain good balance.When aforementioned wide-viewing angle taking lens group meets following relationship: TTL/ImgH < 8.6, is conducive to expand field angle and reduces camera lens total length.

In the aforementioned wide-viewing angle taking lens group of the present invention, this aperture is set between these second lens and the 4th lens, object is to utilize at least two pieces of negative lenses of configuration before this aperture, make system obtain sufficient field angle, at least two pieces of lens of configuration are after this aperture simultaneously, can make system aberration obtain good revisal, to obtain the characteristic of Wide-angle and high image quality, and so configuration mode can contribute to reduce the susceptibility of system.

In the aforementioned wide-viewing angle taking lens group of the present invention, two pieces of tool refracting power lens of the most close thing side are this first lens and this second lens, be conducive to expand the field angle of system, and distribute mutually required negative refracting power by two pieces of negative lenses, can contribute to reduce the excessive increase of system aberration.

In the aforementioned wide-viewing angle taking lens group of the present invention, the lens of tool refracting power are no more than six pieces, for example, can comprise one the 6th lens, it can be placed between wantonly two pieces of lens of these second lens and the 5th lens, contributes to the higher order aberratons of update the system, makes system obtain higher image quality.

In the aforementioned wide-viewing angle taking lens group of the present invention, the thing side surface radius-of-curvature of this first lens is R1 and is R2 as side surface radius-of-curvature, preferably, be to meet following relationship: the < 3.00 of 1.03 < (R1+R2)/(R1-R2).When (R1+R2)/(R1-R2) meet above-mentioned relation formula, the lens shape that can effectively control this first lens is crescent, with favourable system, when expanding field angle, for the refraction of incident ray, comparatively relaxes, and can avoid aberration excessively to increase.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, the lens of tool refracting power are five pieces.

In the aforementioned wide-viewing angle taking lens group of the present invention, the focal length of whole wide-viewing angle taking lens group is f, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, preferably, is to meet following relationship: 0.40 < f/ImgH < 1.10.When f/ImgH meets above-mentioned relation formula, can be conducive to guarantee that this wide-viewing angle taking lens group possesses and has sufficient field angle.

In the aforementioned wide-viewing angle taking lens group of the present invention, the 4th lens as side surface radius-of-curvature, be that R8 and thing side surface radius-of-curvature are R7, preferably, be to meet following relationship :-1.40 < R8/R7 < 0.70.When R8/R7 meets above-mentioned relation formula, can make the 4th lens that sufficient negative refracting power is provided, be conducive to the aberration of update the system, with the resolving power of elevator system.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, the thing side surface of the 4th lens and be all concave surface as side surface, can be conducive to the aberration of update the system.

Again on the other hand, the present invention proposes a kind of wide-viewing angle taking lens group, by thing side, extremely as side, is sequentially comprised: the first lens of the negative refracting power of a tool, and it is concave surface as side surface; The second lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface; The 3rd lens of the positive refracting power of one tool; The 4th lens of the negative refracting power of one tool, it is concave surface as side surface; And the 5th lens of the positive refracting power of a tool; Wherein, in this wide-viewing angle taking lens group, the lens of tool refracting power are five pieces; The thickness of the 4th lens on optical axis is CT4, the 4th lens as side surface radius-of-curvature, be R8, the focal length of whole wide-viewing angle taking lens group is f, one sense electronics optical element is wherein separately set for object imaging in this wide-viewing angle taking lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

0 < CT4/R8 < 0.70; And

0.30＜f/ImgH＜1.25。

When aforementioned wide-viewing angle taking lens group meets following relationship: 0 < CT4/R8 < 0.70, can avoid the 4th lens thickness and curvature excessive, be conducive to image quality.When aforementioned wide-viewing angle taking lens group meets following relationship: 0.30 < f/ImgH < 1.25, can be conducive to guarantee that this wide-viewing angle taking lens group possesses and has sufficient field angle.

In the aforementioned wide-viewing angle taking lens group of the present invention, the thing side surface radius-of-curvature of this first lens is R1 and is R2 as side surface radius-of-curvature, preferably, be to meet following relationship: the < 3.00 of 1.03 < (R1+R2)/(R1-R2).When (R1+R2)/(R1-R2) meet above-mentioned relation formula, the lens shape that can effectively control this first lens is crescent, with favourable system, when expanding field angle, for the refraction of incident ray, comparatively relaxes, and can avoid aberration excessively to increase.

In the aforementioned wide-viewing angle taking lens group of the present invention, the focal length of this first lens is f1, and the focal length of these the second lens is f2, preferably, is to meet following relationship: 0 < f1/f2 < 1.20.When f1/f2 meets above-mentioned relation formula, the refracting power of this first lens and these the second lens configuration is comparatively suitable, can be conducive to obtain field angle widely and reduce the excessive increase of system aberration.

In the aforementioned wide-viewing angle taking lens group of the present invention, preferably, the 4th lens thing side surface is concave surface, can be conducive to the aberration of update the system.

In wide-viewing angle taking lens group of the present invention, the material of lens can be glass or plastic cement, if the material of lens is glass, can increase the degree of freedom of system refracting power configuration, if lens material is plastic cement, can effectively reduce production costs.

In wide-viewing angle taking lens group of the present invention, if lens surface is convex surface, represent that this lens surface is convex surface at paraxial place; If lens surface is concave surface, represent that this lens surface is concave surface at paraxial place.

Wide-viewing angle taking lens group of the present invention will coordinate accompanying drawing to be described in detail by following specific embodiment.

The first embodiment:

First embodiment of the invention refers to Figure 1A, and the aberration curve of the first embodiment refers to Figure 1B.The wide-viewing angle taking lens group of the first embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 110 of the negative refracting power of one tool, its thing side surface 111 is that convex surface and picture side surface 112 are concave surface, its material is glass;

The second lens 120 of the negative refracting power of one tool, its thing side surface 121 be that convex surface and picture side surface 122 are concave surface, its material is plastic cement, the thing side surface 121 of these the second lens 120 and be all aspheric surface as side surface 122;

The 3rd lens 130 of the positive refracting power of one tool, its thing side surface 131 and be all convex surface as side surface 132, its material is plastic cement, the thing side surface 131 of the 3rd lens 130 and be all aspheric surface as side surface 132;

The 4th lens 140 of the negative refracting power of one tool, its thing side surface 141 and be all concave surface as side surface 142, its material is glass; And

The 5th lens 150 of the positive refracting power of one tool, its thing side surface 151 and be all convex surface as side surface 152, its material is glass, the 4th lens 140 and the 5th lens 150 engage one another and become a doublet;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 100 and is placed between the 3rd lens 130 and the 4th lens 140, and a sense electronics optical element is set at imaging surface 190 places, for object imaging;

Separately include an infrared ray filtering optical filter (IR-filter) 160 and be placed in looking like between side surface 152 and this imaging surface 190 of the 5th lens 150; The material of this infrared ray filtering optical filter 160 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equation of above-mentioned aspheric curve is expressed as follows:

$X\left(Y\right)=({\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="HDA0000031560250000191.png,HDA0000031560250000211.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2/R)/(1+\mathrm{sqrt}(1-(1+k)*{(Y/R)}^2))+\underset{i}{\mathrm{\&Sigma;}}\left(\mathrm{Ai}\right)*\left(Y^i\right)$

Wherein:

X: the point that in aspheric surface, distance optical axis is Y, itself and the relative height that is tangential on the tangent plane on summit on aspheric surface optical axis;

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

K: conical surface coefficient;

Ai: i rank asphericity coefficient.

In the first embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=2.78 (millimeter).

In the first embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group (f-number) is Fno, and its relational expression is: Fno=2.80.

In the first embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=78.0 (degree).

In the first embodiment wide-viewing angle taking lens group, the abbe number of this first lens 110 is V1, and the abbe number of these the second lens 120 is V2, and its relational expression is: V1-V2=33.3.

In the first embodiment wide-viewing angle taking lens group, the focal length of this first lens 110 is f1, and the focal length of these the second lens 120 is f2, and its relational expression is: f1/f2=0.26.

In the first embodiment wide-viewing angle taking lens group, the 4th lens as side surface 142 radius-of-curvature, be R8, thing side surface 141 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-0.26.

In the first embodiment wide-viewing angle taking lens group, thing side surface 111 radius-of-curvature of this first lens are R1 and are R2 as side surface 112 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.11.

In the first embodiment wide-viewing angle taking lens group, these second lens 120 are T23 with the distance of the 3rd lens 130 on optical axis, and this first lens 110 is T12 with the distance of these the second lens 120 on optical axis, and its relational expression is: T23/T12=0.34.

In the first embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 140 on optical axis is CT4, the 4th lens as side surface 142 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.11.

In the first embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.93.

In the first embodiment wide-viewing angle taking lens group, this aperture 100 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 111 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.45.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=4.97.

The detailed optical data of the first embodiment is as shown in Figure 10 table one, and its aspherical surface data is as shown in Figure 11 table two, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The second embodiment:

Second embodiment of the invention refers to Fig. 2 A, and the aberration curve of the second embodiment refers to Fig. 2 B.The wide-viewing angle taking lens group of the second embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 210 of the negative refracting power of one tool, its thing side surface 211 is that convex surface and picture side surface 212 are concave surface, its material is glass;

The second lens 220 of the negative refracting power of one tool, its thing side surface 221 be that convex surface and picture side surface 222 are concave surface, its material is plastic cement, the thing side surface 221 of these the second lens 220 and be all aspheric surface as side surface 222;

The 3rd lens 230 of the positive refracting power of one tool, its thing side surface 231 and be all convex surface as side surface 232, its material is plastic cement, the thing side surface 231 of the 3rd lens 230 and be all aspheric surface as side surface 232;

The 4th lens 240 of the negative refracting power of one tool, its thing side surface 241 and be all concave surface as side surface 242, its material is plastic cement, the thing side surface 241 of the 4th lens 240 and be all aspheric surface as side surface 242; And

The 5th lens 250 of the positive refracting power of one tool, its thing side surface 251 and be all convex surface as side surface 252, its material is plastic cement, the thing side surface 251 of the 5th lens 250 and be all aspheric surface as side surface 252;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 200 and is placed between these second lens 220 and the 3rd lens 230, and a sense electronics optical element is set in imaging surface 290 places, for object imaging;

Separately include an infrared ray filtering optical filter 260 and a cover glass (Cover-glass) 270 and be sequentially placed in looking like between side surface 252 and this imaging surface 290 of the 5th lens 250; The material of this infrared ray filtering optical filter 260 and this cover glass 270 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the second embodiment aspheric curve is as the form of the first embodiment.

In the second embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=1.19 (millimeter).

In the second embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.20.

In the second embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=84.1 (degree).

In the second embodiment wide-viewing angle taking lens group, the abbe number of this first lens 210 is V1, and the abbe number of these the second lens 220 is V2, and its relational expression is: V1-V2=31.3.

In the second embodiment wide-viewing angle taking lens group, the focal length of this first lens 210 is f1, and the focal length of these the second lens 220 is f2, and its relational expression is: f1/f2=0.94.

In the second embodiment wide-viewing angle taking lens group, the 4th lens as side surface 142 radius-of-curvature, be R8, thing side surface 141 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-0.75.

In the second embodiment wide-viewing angle taking lens group, thing side surface 211 radius-of-curvature of this first lens are R1 and are R2 as side surface 212 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.83.

In the second embodiment wide-viewing angle taking lens group, these second lens 220 are T23 with the distance of the 3rd lens 230 on optical axis, and this first lens 210 is T12 with the distance of these the second lens 220 on optical axis, and its relational expression is: T23/T12=0.33.

In the second embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 240 on optical axis is CT4, the 4th lens as side surface 242 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.36.

In the second embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.46.

In the second embodiment wide-viewing angle taking lens group, this aperture 200 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 211 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.51.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=4.63.

The detailed optical data of the second embodiment is as shown in Figure 12 table three, and its aspherical surface data is as shown in Figure 13 table four, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 3rd embodiment:

Third embodiment of the invention refers to Fig. 3 A, and the aberration curve of the 3rd embodiment refers to Fig. 3 B.The wide-viewing angle taking lens group of the 3rd embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 310 of the negative refracting power of one tool, its thing side surface 311 is that convex surface and picture side surface 312 are concave surface, its material is glass;

The second lens 320 of the negative refracting power of one tool, its thing side surface 321 be that convex surface and picture side surface 322 are concave surface, its material is plastic cement, the thing side surface 321 of these the second lens 320 and be all aspheric surface as side surface 322;

The 3rd lens of the positive refracting power of one tool, its thing side surface 321 is that concave surface and picture side surface 322 are convex surface, its material is plastic cement, the thing side surface 321 of the 3rd lens 320 and be all aspheric surface as side surface 322;

The 4th lens 340 of the negative refracting power of one tool, its thing side surface 341 is that convex surface and picture side surface 342 are concave surface, its material is glass; And

The 5th lens 350 of the positive refracting power of one tool, its thing side surface 351 and be all convex surface as side surface 352, its material is glass, the 4th lens 340 and the 5th lens 350 engage one another and become a doublet;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 300 and is placed between the 3rd lens 330 and the 4th lens 340, and a sense electronics optical element is set in imaging surface 390 places, for object imaging;

Separately include an infrared ray filtering optical filter 360 and be placed in looking like between side surface 352 and this sense electronics optical element imaging surface 390 of the 5th lens 350; The material of this infrared ray filtering optical filter 360 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the 3rd embodiment aspheric curve is as the form of the first embodiment.

In the 3rd embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=2.68 (millimeter).

In the 3rd embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.8.

In the 3rd embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=75.5 (degree).

In the 3rd embodiment wide-viewing angle taking lens group, the abbe number of this first lens 310 is V1, and the abbe number of these the second lens 320 is V2, and its relational expression is: V1-V2=36.5.

In the 3rd embodiment wide-viewing angle taking lens group, the focal length of this first lens 310 is f1, and the focal length of these the second lens 320 is f2, and its relational expression is: f1/f2=0.13.

In the 3rd embodiment wide-viewing angle taking lens group, the 4th lens as side surface 342 radius-of-curvature, be R8, thing side surface 341 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=021.

In the 3rd embodiment wide-viewing angle taking lens group, thing side surface 311 radius-of-curvature of this first lens are R1 and are R2 as side surface 312 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.24.

In the 3rd embodiment wide-viewing angle taking lens group, these second lens 320 are T23 with the distance of the 3rd lens 330 on optical axis, and this first lens 310 is T12 with the distance of these the second lens 320 on optical axis, and its relational expression is: T23/T12=0.44.

In the 3rd embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 340 on optical axis is CT4, the 4th lens as side surface 342 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.11.

In the 3rd embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.96.

In the 3rd embodiment wide-viewing angle taking lens group, this aperture 300 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 311 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.50.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=5.32.

The detailed optical data of the 3rd embodiment is as shown in Figure 14 table five, and its aspherical surface data is as shown in Figure 15 table six, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 4th embodiment:

Fourth embodiment of the invention refers to Fig. 4 A, and the aberration curve of the 4th embodiment refers to Fig. 4 B.The wide-viewing angle taking lens group of the 4th embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 410 of the negative refracting power of one tool, its thing side surface 411 and be all concave surface as side surface 412, its material is plastic cement, the thing side surface 411 of this first lens 410 and be all aspheric surface as side surface 412;

The second lens 420 of the negative refracting power of one tool, its thing side surface 421 be that convex surface and picture side surface 422 are concave surface, its material is plastic cement, the thing side surface 421 of these the second lens 420 and be all aspheric surface as side surface 422;

The 3rd lens 430 of the positive refracting power of one tool, its thing side surface 431 and be all convex surface as side surface 432, its material is plastic cement, the thing side surface 431 of the 3rd lens 430 and be all aspheric surface as side surface 432;

The 4th lens 440 of the negative refracting power of one tool, its thing side surface 441 and be all concave surface as side surface 442, its material is glass; And

The 5th lens 450 of the positive refracting power of one tool, its thing side surface 451 and be all convex surface as side surface 452, its material is glass, the 4th lens 440 and the 5th lens 450 engage one another and become a doublet;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 400 and is placed between the 3rd lens 430 and the 4th lens 440, and a sense electronics optical element is set in imaging surface 490 places, for object imaging;

Separately include an infrared ray filtering optical filter 460 and be placed in looking like between side surface 452 and this imaging surface 490 of the 5th lens 450; The material of this infrared ray filtering optical filter 460 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the 4th embodiment aspheric curve is as the form of the first embodiment.

In the 4th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=2.49 (millimeter).

In the 4th embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.80.

In the 4th embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=732 (degree).

In the 4th embodiment wide-viewing angle taking lens group, the abbe number of this first lens 410 is V1, and the abbe number of these the second lens 420 is V2, and its relational expression is: V1-V2=32.5.

In the 4th embodiment wide-viewing angle taking lens group, the focal length of this first lens 410 is f1, and the focal length of these the second lens 420 is f2, and its relational expression is: f1/f2=0.16.

In the 4th embodiment wide-viewing angle taking lens group, the 4th lens as side surface 442 radius-of-curvature, be R8, thing side surface 441 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-0.13.

In the 4th embodiment wide-viewing angle taking lens group, thing side surface 411 radius-of-curvature of this first lens are R1 and are R2 as side surface 412 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=0.40.

In the 4th embodiment wide-viewing angle taking lens group, these second lens 420 are T23 with the distance of the 3rd lens 430 on optical axis, and this first lens 410 is T12 with the distance of these the second lens 420 on optical axis, and its relational expression is: T23/T12=0.30.

In the 4th embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 440 on optical axis is CT4, the 4th lens as side surface 442 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.11.

In the 4th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.83.

In the 4th embodiment wide-viewing angle taking lens group, this aperture 400 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 411 of this first lens is TTL to the distance of this sense electronics optical element 490 on optical axis, and its relational expression is: SL/TTL=0.46.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=4.63.

The detailed optical data of the 4th embodiment is as shown in Figure 16 table seven, and its aspherical surface data is as shown in Figure 17 table eight, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 5th embodiment:

Fifth embodiment of the invention refers to Fig. 5 A, and the aberration curve of the 5th embodiment refers to Fig. 5 B.The wide-viewing angle taking lens group of the 5th embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 510 of the negative refracting power of one tool, its thing side surface 511 is that convex surface and picture side surface 512 are concave surface, its material is glass;

The second lens 520 of the negative refracting power of one tool, its thing side surface 521 be that convex surface and picture side surface 522 are concave surface, its material is plastic cement, the thing side surface 521 of these the second lens 520 and be all aspheric surface as side surface 522;

The 3rd lens 530 of the positive refracting power of one tool, its thing side surface 531 and picture side surface 532 are convex surface, its material is plastic cement, the thing side surface 531 of the 3rd lens 530 and be all aspheric surface as side surface 532;

The 4th lens 540 of the negative refracting power of one tool, its thing side surface 541 and be all concave surface as side surface 542, its material is plastic cement, the thing side surface 541 of the 4th lens 540 and be all aspheric surface as side surface 542; And

The 5th lens 550 of the positive refracting power of one tool, its thing side surface 551 is that concave surface and picture side surface 552 are convex surface, its material is plastic cement, the thing side surface 551 of the 5th lens 550 and be all aspheric surface as side surface 552;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 500 and is placed between these second lens 520 and the 3rd lens 540, and a sense electronics optical element is set in imaging surface 590 places, for object imaging;

Separately include an infrared ray filtering optical filter 560 and a cover glass 570 and be sequentially placed in looking like between side surface 552 and this imaging surface 590 of the 5th lens 550; The material of this infrared ray filtering optical filter 560 and this cover glass 570 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the 5th embodiment aspheric curve is as the form of the first embodiment.

In the 5th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=1.23 (millimeter).

In the 5th embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.20.

In the 5th embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=84.0 (degree).

In the 5th embodiment wide-viewing angle taking lens group, the abbe number of this first lens 510 is V1, and the abbe number of these the second lens 520 is V2, and its relational expression is: V1-V2=31.3.

In the 5th embodiment wide-viewing angle taking lens group, the focal length of this first lens 510 is f1, and the focal length of these the second lens 520 is f2, and its relational expression is: f1/f2=0.91.

In the 5th embodiment wide-viewing angle taking lens group, the 4th lens as side surface 542 radius-of-curvature, be R8, thing side surface 541 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-0.37.

In the 5th embodiment wide-viewing angle taking lens group, thing side surface 511 radius-of-curvature of this first lens are R1 and are R2 as side surface 512 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.83.

In the 5th embodiment wide-viewing angle taking lens group, these second lens 520 are T23 with the distance of the 3rd lens 530 on optical axis, and this first lens 510 is T12 with the distance of these the second lens 520 on optical axis, and its relational expression is: T23/T12=0.29.

In the 5th embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 540 on optical axis is CT4, the 4th lens as side surface 542 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.39.

In the 5th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.47.

In the 5th embodiment wide-viewing angle taking lens group, this aperture 500 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 511 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.49.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=4.53.

The detailed optical data of the 5th embodiment is as shown in Figure 18 table nine, and its aspherical surface data is as shown in Figure 19 table ten, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 6th embodiment:

Sixth embodiment of the invention refers to Fig. 6 A, and the aberration curve of the 6th embodiment refers to Fig. 6 B.The wide-viewing angle taking lens group of the 6th embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 610 of the negative refracting power of one tool, its thing side surface 611 be that convex surface and picture side surface 612 are concave surface, its material is plastic cement, the thing side surface 611 of this first lens 610 and be all aspheric surface as side surface 612;

The second lens 620 of the negative refracting power of one tool, its thing side surface 621 be that convex surface and picture side surface 622 are concave surface, its material is plastic cement, the thing side surface 621 of these the second lens 620 and be all aspheric surface as side surface 622;

The 3rd lens 630 of the positive refracting power of one tool, its thing side surface 631 and picture side surface 632 are convex surface, its material is plastic cement, the thing side surface 631 of the 3rd lens 630 and be all aspheric surface as side surface 632;

The 4th lens 640 of the negative refracting power of one tool, its thing side surface 641 and picture side surface 642 are concave surface, its material is glass; And

The 5th lens 650 of the positive refracting power of one tool, its thing side surface 651 and be all convex surface as side surface 652, its material is glass, the 4th lens 640 and the 5th lens 650 engage one another and become a doublet;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 600 and is placed between the 3rd lens 630 and the 4th lens 640, and a sense electronics optical element is set in imaging surface 690 places, for object imaging;

Separately include an infrared ray filtering optical filter 660 and be placed in looking like between side surface 652 and this imaging surface 690 of the 5th lens 650; The material of this infrared ray filtering optical filter 660 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the 6th embodiment aspheric curve is as the form of the first embodiment.

In the 6th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=3.06 (millimeter).

In the 6th embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.80.

In the 6th embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=77.8 (degree).

In the 6th embodiment wide-viewing angle taking lens group, the abbe number of this first lens 610 is V1, and the abbe number of these the second lens 620 is V2, and its relational expression is: V1-V2=30.2.

In the 6th embodiment wide-viewing angle taking lens group, the focal length of this first lens 610 is f1, and the focal length of these the second lens 620 is f2, and its relational expression is: f1/f2=0.25.

In the 6th embodiment wide-viewing angle taking lens group, the 4th lens as side surface 642 radius-of-curvature, be R8, thing side surface 641 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-0.18.

In the 6th embodiment wide-viewing angle taking lens group, thing side surface 611 radius-of-curvature of this first lens are R1 and are R2 as side surface 612 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.08.

In the 6th embodiment wide-viewing angle taking lens group, these second lens 620 are T23 with the distance of the 3rd lens 630 on optical axis, and this first lens 610 is T12 with the distance of these the second lens 620 on optical axis, and its relational expression is: T23/T12=0.51.

In the 6th embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 640 on optical axis is CT4, the 4th lens as side surface 642 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.19.

In the 6th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=1.02.

In the 6th embodiment wide-viewing angle taking lens group, this aperture 600 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 611 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.46.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=4.63.

The detailed optical data of the 6th embodiment is as shown in Figure 20 table ten one, and its aspherical surface data is as shown in Figure 21 table ten two, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 7th embodiment:

Seventh embodiment of the invention refers to Fig. 7 A, and the aberration curve of the 7th embodiment refers to Fig. 7 B.The wide-viewing angle taking lens group of the 7th embodiment mainly consists of five pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 710 of the negative refracting power of one tool, its thing side surface 711 is that convex surface and picture side surface 712 are concave surface, its material is glass;

The second lens 720 of the negative refracting power of one tool, its thing side surface 721 and picture side surface 722 are concave surface, its material is plastic cement, the thing side surface 721 of these the second lens 720 and be all aspheric surface as side surface 722;

The 3rd lens 730 of the positive refracting power of one tool, its thing side surface 731 and picture side surface 732 are convex surface, its material is plastic cement, the thing side surface 731 of the 3rd lens 730 and be all aspheric surface as side surface 732;

The 4th lens 740 of the negative refracting power of one tool, its thing side surface 741 and picture side surface 742 are concave surface, its material is glass; And

The 5th lens 750 of the positive refracting power of one tool, its thing side surface 751 and picture side surface 752 are convex surface, and its material is glass, and the 4th lens 740 and the 5th lens 750 engage one another and become a doublet;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 700 and is placed between the 3rd lens 730 and the 4th lens 740, and a sense electronics optical element is set in imaging surface 790 places, for object imaging;

Separately include an infrared ray filtering optical filter 760 and be placed in looking like between side surface 752 and this imaging surface 790 of the 5th lens 750; The material of this infrared ray filtering optical filter 760 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the 7th embodiment aspheric curve is as the form of the first embodiment.

In the 7th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=2.75 (millimeter).

In the 7th embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.40.

In the 7th embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=84.0 (degree).

In the 7th embodiment wide-viewing angle taking lens group, the abbe number of this first lens 710 is V1, and the abbe number of these the second lens 720 is V2, and its relational expression is: V1-V2=42.7.

In the 7th embodiment wide-viewing angle taking lens group, the focal length of this first lens 710 is f1, and the focal length of these the second lens 720 is f2, and its relational expression is: f1/f2=1.13.

In the 7th embodiment wide-viewing angle taking lens group, the 4th lens as side surface 742 radius-of-curvature, be R8, thing side surface 741 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-0.35.

In the 7th embodiment wide-viewing angle taking lens group, thing side surface 711 radius-of-curvature of this first lens are R1 and are R2 as side surface 712 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.37.

In the 7th embodiment wide-viewing angle taking lens group, these second lens 720 are T23 with the distance of the 3rd lens 730 on optical axis, and this first lens 710 is T12 with the distance of these the second lens 720 on optical axis, and its relational expression is: T23/T12=0.81.

In the 7th embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 740 on optical axis is CT4, the 4th lens as side surface 742 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.11.

In the 7th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.89.

In the 7th embodiment wide-viewing angle taking lens group, this aperture 700 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 711 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.43.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=5.77.

The detailed optical data of the 7th embodiment is as shown in Figure 22 table ten three, and its aspherical surface data is as shown in Figure 23 table ten four, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 8th embodiment:

Eighth embodiment of the invention refers to Fig. 8 A, and the aberration curve of the 8th embodiment refers to Fig. 8 B.The wide-viewing angle taking lens group of the 8th embodiment mainly consists of six pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 810 of the negative refracting power of one tool, its thing side surface 811 is that convex surface and picture side surface 812 are concave surface, its material is glass;

The second lens 820 of the negative refracting power of one tool, its thing side surface 821 be that convex surface and picture side surface 822 are concave surface, its material is plastic cement, the thing side surface 821 of these the second lens 820 and be all aspheric surface as side surface 822;

The 3rd lens 830 of the positive refracting power of one tool, its thing side surface 831 and be all convex surface as side surface 832, its material is glass;

The 4th lens 840 of the negative refracting power of one tool, its thing side surface 841 and be all concave surface as side surface 842, its material is plastic cement, the thing side surface 841 of the 4th lens 840 and be all aspheric surface as side surface 842; And

The 5th lens 850 of the positive refracting power of one tool, its thing side surface 851 and be all convex surface as side surface 852, its material is plastic cement, the thing side surface 851 of the 5th lens 850 and be all aspheric surface as side surface 852;

Wherein, the 6th lens 860 that more include the positive refracting power of a tool in this wide-viewing angle taking lens group, it inserts between these second lens 820 and the 3rd lens 830, and the thing side surface 861 of the 6th lens 860 is that convex surface and picture side surface 862 are concave surface, and its material is glass;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 800 and is placed between the 6th lens 860 and the 3rd lens 830, and a sense electronics optical element is set in imaging surface 890 places, for object imaging;

Separately include an infrared ray filtering optical filter 870 and a cover glass 880 and be sequentially placed in looking like between side surface 852 and this imaging surface 890 of the 5th lens 850; The material of this infrared ray filtering optical filter 870 and this cover glass 880 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

The equational expression of the 8th embodiment aspheric curve is as the form of the first embodiment.

In the 8th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=1.27 (millimeter).

In the 8th embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.82.

In the 8th embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=72.4 (degree).

In the 8th embodiment wide-viewing angle taking lens group, the abbe number of this first lens 810 is V1, and the abbe number of these the second lens 820 is V2, and its relational expression is: V1-V2=4.5.

In the 8th embodiment wide-viewing angle taking lens group, the focal length of this first lens 810 is f1, and the focal length of these the second lens 820 is f2, and its relational expression is: f1/f2=3.02.

In the 8th embodiment wide-viewing angle taking lens group, the 4th lens as side surface 842 radius-of-curvature, be R8, thing side surface 841 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-3.92.

In the 8th embodiment wide-viewing angle taking lens group, thing side surface 811 radius-of-curvature of this first lens are R1 and are R2 as side surface 812 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=2.03.

In the 8th embodiment wide-viewing angle taking lens group, these second lens 820 are T23 with the distance of the 3rd lens 830 on optical axis, and this first lens 810 is T12 with the distance of these the second lens 820 on optical axis, and its relational expression is: T23/T12=2.45.

In the 8th embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 840 on optical axis is CT4, the 4th lens as side surface 842 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.07.

In the 8th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.56.

In the 8th embodiment wide-viewing angle taking lens group, this aperture 800 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 811 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.42.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=8.14.

The detailed optical data of the 8th embodiment is as shown in Figure 24 table ten five, and its aspherical surface data is as shown in Figure 25 table ten six, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

The 9th embodiment:

Ninth embodiment of the invention refers to Fig. 9 A, and the aberration curve of the 9th embodiment refers to Fig. 9 B.The wide-viewing angle taking lens group of the 9th embodiment mainly consists of six pieces of lens, by thing side, extremely as side, is sequentially comprised:

The first lens 910 of the negative refracting power of one tool, its thing side surface 911 is that convex surface and picture side surface 912 are concave surface, its material is glass;

The second lens 920 of the negative refracting power of one tool, its thing side surface 921 is that convex surface and picture side surface 922 are concave surface, its material is glass;

The 3rd lens 930 of the positive refracting power of one tool, its thing side surface 931 and be all convex surface as side surface 932, its material is glass;

The 4th lens 940 of the negative refracting power of one tool, its thing side surface 941 and be all concave surface as side surface 942, its material is glass; And

The 5th lens 950 of the positive refracting power of one tool, its thing side surface 951 and be all convex surface as side surface 952, its material is glass;

Wherein, more include the 6th lens 960 of the positive refracting power of a tool in this wide-viewing angle taking lens group, it inserts between these second lens 920 and the 3rd lens 930, its thing side surface 961 and be all convex surface as side surface 962, and its material is glass;

Wherein, this wide-viewing angle taking lens group is separately provided with an aperture 900 and is placed between the 6th lens 960 and the 3rd lens 930, and a sense electronics optical element is set in imaging surface 990 places, for object imaging;

Separately include an infrared ray filtering optical filter 970 and be placed in looking like between side surface 952 and this imaging surface 990 of the 5th lens 950; The material of this infrared ray filtering optical filter 970 is that glass and its do not affect the focal length of wide-viewing angle taking lens group of the present invention.

In the 9th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and its relational expression is: f=1.70 (millimeter).

In the 9th embodiment wide-viewing angle taking lens group, the f-number of whole wide-viewing angle taking lens group is Fno, and its relational expression is: Fno=2.40.

In the 9th embodiment wide-viewing angle taking lens group, in whole wide-viewing angle taking lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=88.7 (degree).

In the 9th embodiment wide-viewing angle taking lens group, the abbe number of this first lens 910 is V1, and the abbe number of these the second lens 920 is V2, and its relational expression is: V1-V2=0.0.

In the 9th embodiment wide-viewing angle taking lens group, the focal length of this first lens 910 is f1, and the focal length of these the second lens 920 is f2, and its relational expression is: f1/f2=0.91.

In the 9th embodiment wide-viewing angle taking lens group, the 4th lens as side surface 942 radius-of-curvature, be R8, thing side surface 941 radius-of-curvature of the 4th lens are R7, its relational expression is: R8/R7=-1.46.

In the 9th embodiment wide-viewing angle taking lens group, thing side surface 911 radius-of-curvature of this first lens are R1 and are R2 as side surface 912 radius-of-curvature, and its relational expression is: (R1+R2)/(R1-R2)=1.42.

In the 9th embodiment wide-viewing angle taking lens group, these second lens 920 are T23 with the distance of the 3rd lens 930 on optical axis, and this first lens 910 is T12 with the distance of these the second lens 920 on optical axis, and its relational expression is: T23/T12=6.03.

In the 9th embodiment wide-viewing angle taking lens group, the thickness of the 4th lens 940 on optical axis is CT4, the 4th lens as side surface 942 radius-of-curvature, be R8, its relational expression is: CT4/R8=0.12.

In the 9th embodiment wide-viewing angle taking lens group, the focal length of whole wide-viewing angle taking lens group is f, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: f/ImgH=0.75.

In the 9th embodiment wide-viewing angle taking lens group, this aperture 900 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 911 of this first lens is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.40.Moreover half of this sense electronics optical element effective pixel area diagonal line length is ImgH, its relational expression is: TTL/ImgH=8.31.

The detailed optical data of the 9th embodiment is as shown in Figure 26 table ten seven, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.

Table one is depicted as the different numerical value change tables of wide-viewing angle taking lens group embodiment of the present invention to table ten seven (corresponding Figure 10 to Figure 26 respectively); the all true gained of testing of numerical value change of right each embodiment of the present invention; even if use different numerical value; the product of same structure must belong to protection category of the present invention; therefore above explanation is described and accompanying drawing only as exemplary, non-in order to limit claim of the present invention.Table ten eight (corresponding Figure 27) is the numeric data of the corresponding correlationship formula of the present invention of each embodiment.

Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (19)

1. a wide-viewing angle taking lens group, is characterized in that, described wide-viewing angle taking lens group is extremely sequentially comprised as side by thing side:

The first lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface;

The second lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface;

The 3rd lens of the positive refracting power of one tool;

The 4th lens of the negative refracting power of one tool, it is concave surface as side surface; And

The 5th lens of the positive refracting power of one tool;

Wherein, in described wide-viewing angle taking lens group, two pieces of tool refracting power lens of the most close thing side are described first lens and described the second lens, and in described wide-viewing angle taking lens group, the lens of tool refracting power are five pieces, the focal length of described first lens is f1, the focal length of described the second lens is f2, described the second lens and the distance of described the 3rd lens on optical axis are T23, described first lens and the distance of described the second lens on optical axis are T12, described the 4th lens as side surface radius-of-curvature, be R8, the thing side surface radius-of-curvature of described the 4th lens is R7, the focal length of whole wide-viewing angle taking lens group is f, one sense electronics optical element is separately set for object imaging in wherein said wide-viewing angle taking lens group, half of described sense electronics optical element effective pixel area diagonal line length is ImgH, meet following relationship:

0<f1/f2<2.00；

0.15<T23/T12<0.69；

-1.40<R8/R7<0.70; And

0.40<f/ImgH<1.10。

2. wide-viewing angle taking lens group as claimed in claim 1, is characterized in that, the thing side surface of described the 5th lens and be all convex surface as side surface.

3. wide-viewing angle taking lens group as claimed in claim 1, is characterized in that, the thing side surface radius-of-curvature of described first lens is R1 and is R2 as side surface radius-of-curvature, meets following relationship:

1.03<(R1+R2)/(R1-R2)<3.00。

4. wide-viewing angle taking lens group as claimed in claim 3, is characterized in that, described the second lens have aspheric surface, and described the second lens material is plastic cement.

5. wide-viewing angle taking lens group as claimed in claim 3, is characterized in that, the focal length of described first lens is f1, and the focal length of described the second lens is f2, meets following relationship:

0<f1/f2<1.20。

6. wide-viewing angle taking lens group as claimed in claim 3, it is characterized in that, described wide-viewing angle taking lens group is separately provided with an aperture between described the second lens and described the 4th lens, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, meets following relationship:

0.30<SL/TTL<0.65。

7. wide-viewing angle taking lens group as claimed in claim 1, is characterized in that, at least comprises one piece of aspheric lens of tool in described wide-viewing angle taking lens group.

8. wide-viewing angle taking lens group as claimed in claim 7, is characterized in that, the abbe number of described first lens is V1, and the abbe number of described the second lens is V2, meets following relationship:

20<V1-V2<50。

9. wide-viewing angle taking lens group as claimed in claim 1, is characterized in that, the thing side surface of described the 4th lens is concave surface.

10. wide-viewing angle taking lens group as claimed in claim 1, is characterized in that, described the 4th lens engage one another and become a doublet with described the 5th lens.

11. wide-viewing angle taking lens groups as claimed in claim 1, it is characterized in that, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and half of described sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

TTL/ImgH<8.6。

12. wide-viewing angle taking lens groups as claimed in claim 11, it is characterized in that, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and half of described sense electronics optical element effective pixel area diagonal line length is ImgH, meets following relationship:

TTL/ImgH<6.0。

13. 1 kinds of wide-viewing angle taking lens groups, is characterized in that, described wide-viewing angle taking lens group is extremely sequentially comprised as side by thing side:

The first lens of the negative refracting power of one tool, it is concave surface as side surface;

The second lens of the negative refracting power of one tool, it is concave surface as side surface;

The 3rd lens of the positive refracting power of one tool;

The 4th lens of the negative refracting power of one tool; And

The 5th lens of the positive refracting power of one tool;

Wherein, in described wide-viewing angle taking lens group, be separately provided with an aperture between described the second lens and described the 4th lens;

Wherein, in described wide-viewing angle taking lens group, two pieces of tool refracting power lens of the most close thing side are described first lens and described the second lens; And in described wide-viewing angle taking lens group, the lens of tool refracting power are five pieces; The focal length of described first lens is f1, the focal length of described the second lens is f2, one sense electronics optical element is separately set for object imaging in wherein said wide-viewing angle taking lens group, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, half of described sense electronics optical element effective pixel area diagonal line length is ImgH, the focal length of whole wide-viewing angle taking lens group is f, meets following relationship:

0<f1/f2<1.20；

0.20<SL/TTL<0.85；

TTL/ImgH<8.6; And

0.40<f/ImgH<1.10。

14. wide-viewing angle taking lens groups as claimed in claim 13, is characterized in that, the thing side surface radius-of-curvature of described first lens is R1 and is R2 as side surface radius-of-curvature, meets following relationship:

1.03<(R1+R2)/(R1-R2)<3.00。

15. wide-viewing angle taking lens groups as claimed in claim 14, is characterized in that, described the 4th lens as side surface radius-of-curvature, be that R8 and thing side surface radius-of-curvature are R7, meet following relationship:

-1.40<R8/R7<0.70。

16. wide-viewing angle taking lens groups as claimed in claim 14, is characterized in that, the thing side surface of described the 4th lens and be all concave surface as side surface.

17. 1 kinds of wide-viewing angle taking lens groups, is characterized in that, described wide-viewing angle taking lens group is extremely sequentially comprised as side by thing side:

The first lens of the negative refracting power of one tool, it is concave surface as side surface;

The second lens of the negative refracting power of one tool, its thing side surface is convex surface and is concave surface as side surface;

The 3rd lens of the positive refracting power of one tool;

The 4th lens of the negative refracting power of one tool, it is concave surface as side surface; And

The 5th lens of the positive refracting power of one tool;

Wherein, in described wide-viewing angle taking lens group, the lens of tool refracting power are five pieces; The thickness of described the 4th lens on optical axis is CT4, described the 4th lens as side surface radius-of-curvature, be R8, the focal length of whole wide-viewing angle taking lens group is f, one sense electronics optical element is separately set for object imaging in wherein said wide-viewing angle taking lens group, half of described sense electronics optical element effective pixel area diagonal line length is ImgH, the focal length of described first lens is f1, and the focal length of described the second lens is f2, meets following relationship:

0<CT4/R8<0.70；

0.40<f/ImgH<1.10; And

0<f1/f2<1.20。

18. wide-viewing angle taking lens groups as claimed in claim 17, is characterized in that, the thing side surface radius-of-curvature of described first lens is R1 and is R2 as side surface radius-of-curvature, meets following relationship:

1.03<(R1+R2)/(R1-R2)<3.00。

19. wide-viewing angle taking lens groups as claimed in claim 17, is characterized in that, described the 4th lens thing side surface is concave surface.

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