CN107167901A - Pick-up lens - Google Patents

Abstract

This application discloses a kind of pick-up lens, the first lens, the second lens, the 3rd lens and the 4th lens are sequentially included by thing side to image side with effective focal length f and Entry pupil diameters EPD, and along optical axis, wherein, first lens can have negative power, and its image side surface is concave surface；Second lens can have positive light coke or negative power；3rd lens can have positive light coke；4th lens can have positive light coke or negative power, and its image side surface is convex surface；And first lens effective half bore DT11 of thing side and the half ImgH of pick-up lens electronics light sensitive component effective pixel area diagonal line length between meet：1.2<DT11/ImgH<2.6.

Description

Pick-up lens

Technical field

The application is related to a kind of pick-up lens, more particularly, to a kind of pick-up lens being made up of four eyeglasses.

Background technology

In recent years, field is used in forward positions such as VR/AR (virtual reality/augmented reality), robot, security protection, automatic Pilots, Three dimensional depth camera enjoys dependence.Compared with common camera, three dimensional depth camera is except that can obtain plane picture, also The depth information of reference object, including three-dimensional position and dimension information can be obtained.Then whole computing system just obtains ring Border and the three-dimensional stereo data of object, can be used in human body tracking, three-dimensional reconstruction, man-machine interaction, SLAM (positioning immediately and ground Figure build) etc. technical field.

At present, three dimensional depth measurement typically has three kinds of technical schemes, be respectively pair take the photograph, structure light and TOF, wherein TOF It is the abbreviation of flight time (Time of Flight) technology, that is, calculates the time of light flight.TOF technologies have response because of it Speed is fast, and depth information precision is high, and physical dimension is small, be not susceptible to the advantages of ambient light is disturbed, and is widely used.

Therefore, the present invention is intended to provide one kind can be applied to it is multi-field, particularly the large aperture of three dimensional depth fields of measurement, The big angle of visual field, high resolution, the pick-up lens of high image quality.

The content of the invention

The technical scheme that the application is provided solves the problems, such as techniques discussed above at least in part.

According to the one side of the application there is provided such a pick-up lens, the pick-up lens have effective focal length f and Entry pupil diameters EPD, the pick-up lens sequentially includes the first lens, the second lens, the 3rd lens along optical axis by thing side to image side With the 4th lens, wherein, the first lens can have negative power, its image side surface be concave surface；Second lens can have positive light coke Or negative power；3rd lens can have positive light coke；4th lens can have positive light coke or negative power, and its image side surface is Convex surface；And first lens thing side effective half bore DT11 and pick-up lens electronics light sensitive component effective pixel area pair Met between the half ImgH of linea angulata length：1.2<DT11/ImgH<2.6.

According to further aspect of the application, such a pick-up lens is additionally provided, the pick-up lens has effective burnt Away from f and Entry pupil diameters EPD, the pick-up lens sequentially includes the first lens, the second lens, the 3rd along optical axis by thing side to image side Lens and the 4th lens, wherein the first lens have negative power, its image side surface is concave surface；3rd lens have positive light coke； The image side surface of 4th lens is convex surface；The combination focal power of first lens and the second lens is negative；3rd lens and the 4th lens Combination focal power for just；And first lens image side surface effective half bore DT32 and the 3rd lens effective focal length Met between f3：0.1<DT32/f3<0.6.

According to further aspect of the application, such a pick-up lens is additionally provided, the pick-up lens has effective burnt Away from f and Entry pupil diameters EPD, the pick-up lens sequentially includes the first lens, the second lens, the 3rd along optical axis by thing side to image side Lens and the 4th lens, wherein the first lens have negative power, its image side surface is concave surface；3rd lens have positive light coke； The image side surface of 4th lens is convex surface；The combination focal power of first lens and the second lens is negative；3rd lens and the 4th lens Combination focal power for just；And 0.9 can be met<SAG11/CT1<1.75, for example, 0.93≤SAG11/CT1≤1.71, its In, SAG11 be the first lens thing side and optical axis intersection point between effective half bore summit of the first lens thing side in light Distance on axle, and CT1 are center thickness of first lens on optical axis.

In one embodiment, it can expire between the effective focal length f of pick-up lens and the effective focal length f1 of the first lens Foot：-4<f1/f<- 2, for example, -2.84≤f1/f≤- 2.32.

In one embodiment, it can expire between the effective focal length f of pick-up lens and the Entry pupil diameters EPD of pick-up lens Foot：F/EPD≤1.8, for example, f/EPD≤1.19.

In one embodiment, the half ImgH of pick-up lens electronics light sensitive component effective pixel area diagonal line length with It can be met between the effective focal length f of pick-up lens：Imgh/f>1, for example, Imgh/f >=1.19.

In one embodiment, the effective focal length f of the radius of curvature R 2 of the image side surface of the first lens and pick-up lens it Between can meet：1<R2/f<1.5, for example, 1.06≤R2/f≤1.38.

In one embodiment, 0.2 can be met<CT1/(CT2+CT3+CT4)<0.5, for example, 0.23≤CT1/ (CT2+ CT3+CT4)≤0.37, wherein, CT1 be center thickness of first lens on optical axis, CT2 be the second lens on optical axis in Heart thickness, CT3 is center thickness of the 3rd lens on optical axis, and CT4 is center thickness of the 4th lens on optical axis.

In one embodiment, it can meet：2<T12/T23<4, for example, 2.06≤T12/T23≤3.75, wherein, T12 For the airspace of the first lens and the second lens on optical axis, and T23 is the second lens and the 3rd lens on optical axis Airspace.

In one embodiment, effective half bore DT11 of the thing side of the first lens and pick-up lens electronics light sensation member It can be met between the half ImgH of part effective pixel area diagonal line length：1.2<DT11/ImgH<2.6, for example, 1.24≤DT11/ ImgH≤2.56。

In one embodiment, the effective half bore DT32 and the effective focal length of the 3rd lens of the image side surface of the first lens It can be met between f3：0.1<DT32/f3<0.6, for example, 0.18≤DT32/f3≤0.55.

In one embodiment, 0.3 can be met<∑CT/TTL<0.6, for example, 0.35≤∑ CT/TTL≤0.46, its In, ∑ CT be the first lens to the 4th lens respectively at the thickness summation on optical axis, and TTL be the first lens thing side into Distance of the image planes on optical axis.

In one embodiment, 0.9 can be met<SAG11/CT1<1.75, for example, 0.93≤SAG11/CT1≤1.71, Wherein, SAG11 be the first lens thing side and optical axis intersection point between effective half bore summit of the first lens thing side Distance on optical axis, and CT1 are center thickness of first lens on optical axis.

In one embodiment, it is provided with infrared band pass filter between the 4th lens and the imaging surface of pick-up lens.

In one embodiment, the combination focal power of the first lens and the second lens can be negative；And the 3rd lens with The combination focal power of 4th lens can be for just.

In one embodiment, the second lens can have positive light coke or negative power.

In one embodiment, the 4th lens can have positive light coke or negative power.

By the pick-up lens of above-mentioned configuration, can be further provided with large aperture, the big angle of visual field, high resolution, wide angle, At least one beneficial effect such as miniaturization, high image quality, balance aberration.

Brief description of the drawings

By referring to the detailed description made by the following drawings, the above and further advantage of presently filed embodiment will become Obtain it is clear that accompanying drawing is intended to show that the illustrative embodiments of the application rather than is limited.In the accompanying drawings：

Fig. 1 is the structural representation for showing the pick-up lens according to the embodiment of the present application 1；

Fig. 2A shows chromatic curve on the axle of the pick-up lens of embodiment 1；

Fig. 2 B show the astigmatism curve of the pick-up lens of embodiment 1；

Fig. 2 C show the ratio chromatism, curve of the pick-up lens of embodiment 1；

Fig. 2 D show the relative illumination curve of the optical imaging system of embodiment 1；

Fig. 3 is the structural representation for showing the pick-up lens according to the embodiment of the present application 2；

Fig. 4 A show chromatic curve on the axle of the pick-up lens of embodiment 2；

Fig. 4 B show the astigmatism curve of the pick-up lens of embodiment 2；

Fig. 4 C show the ratio chromatism, curve of the pick-up lens of embodiment 2；

Fig. 4 D show the relative illumination curve of the optical imaging system of embodiment 2；

Fig. 5 is the structural representation for showing the pick-up lens according to the embodiment of the present application 3；

Fig. 6 A show chromatic curve on the axle of the pick-up lens of embodiment 3；

Fig. 6 B show the astigmatism curve of the pick-up lens of embodiment 3；

Fig. 6 C show the ratio chromatism, curve of the pick-up lens of embodiment 3；

Fig. 6 D show the relative illumination curve of the optical imaging system of embodiment 3；

Fig. 7 is the structural representation for showing the pick-up lens according to the embodiment of the present application 4；

Fig. 8 A show chromatic curve on the axle of the pick-up lens of embodiment 4；

Fig. 8 B show the astigmatism curve of the pick-up lens of embodiment 4；

Fig. 8 C show the ratio chromatism, curve of the pick-up lens of embodiment 4；

Fig. 8 D show the relative illumination curve of the optical imaging system of embodiment 4；

Fig. 9 is the structural representation for showing the pick-up lens according to the embodiment of the present application 5；

Figure 10 A show chromatic curve on the axle of the pick-up lens of embodiment 5；

Figure 10 B show the astigmatism curve of the pick-up lens of embodiment 5；

Figure 10 C show the ratio chromatism, curve of the pick-up lens of embodiment 5；

Figure 10 D show the relative illumination curve of the optical imaging system of embodiment 5；

Figure 11 is the structural representation for showing the pick-up lens according to the embodiment of the present application 6；

Figure 12 A show chromatic curve on the axle of the pick-up lens of embodiment 6；

Figure 12 B show the astigmatism curve of the pick-up lens of embodiment 6；

Figure 12 C show the ratio chromatism, curve of the pick-up lens of embodiment 6；

Figure 12 D show the relative illumination curve of the optical imaging system of embodiment 6；

Figure 13 is the structural representation for showing the pick-up lens according to the embodiment of the present application 7；

Figure 14 A show chromatic curve on the axle of the pick-up lens of embodiment 7；

Figure 14 B show the astigmatism curve of the pick-up lens of embodiment 7；

Figure 14 C show the ratio chromatism, curve of the pick-up lens of embodiment 7；

Figure 14 D show the relative illumination curve of the optical imaging system of embodiment 7.

Embodiment

In order to more fully understand the application, refer to the attached drawing is made into more detailed description to the various aspects of the application.Should Understand, these describe the description of illustrative embodiments simply to the application in detail, rather than limit the application in any way Scope.In the specification, identical reference numbers identical element.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.

It should be noted that in this manual, the statement of first, second grade is only used for a feature and another feature differentiation Come, and do not indicate that any limitation to feature.Therefore, it is discussed below in the case of without departing substantially from teachings of the present application First lens are also known as the second lens.

In the accompanying drawings, for convenience of description, thickness, the size and dimension of lens are somewhat exaggerated.Specifically, accompanying drawing Shown in sphere or aspherical shape be illustrated by way of example.That is, sphere or aspherical shape is not limited to accompanying drawing In the sphere that shows or aspherical shape.Accompanying drawing is merely illustrative and simultaneously non-critical is drawn to scale.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory Represented when being used in bright book exist stated feature, entirety, step, operation, element and/or part, but do not exclude the presence of or It is attached with one or more of the other feature, entirety, step, operation, element, part and/or combinations thereof.In addition, ought be such as When the statement of " ... at least one " is appeared in after the list of listed feature, the whole listed feature of modification, rather than modification Individual component in list.In addition, when describing presently filed embodiment, use " can with " represent " one of the application or Multiple embodiments ".Also, term " exemplary " is intended to refer to example or illustration.

As it is used in the present context, term " substantially ", " about " and similar term are used as the approximate term of table, and The term of table degree is not used as, and is intended to explanation by recognized by those of ordinary skill in the art, measured value or calculated value In inherent variability.

Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein be respectively provided with The application one skilled in the art's is generally understood that identical implication.It will also be appreciated that term is (such as in everyday words Term defined in allusion quotation) implication consistent with their implications in the context of correlation technique should be interpreted as having, and It will not explained with idealization or excessively formal sense, unless clearly such herein limit.

In addition, near axis area refers to the region near optical axis.First lens are closest to the lens of object and the 4th lens It is closest to the lens of photo-sensitive cell.Herein, it is referred to as thing side, each lens near the surface of object in each lens In be referred to as image side surface near the surface of imaging surface.

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The application is further described below in conjunction with specific embodiment.

Such as four lens are had according to the pick-up lens of the application illustrative embodiments, i.e. it is the first lens, second saturating Mirror, the 3rd lens and the 4th lens.This four lens are along optical axis from thing side to image side sequential.

In the exemplary embodiment, the first lens can have negative power, and its image side surface is concave surface；Second lens can have There are positive light coke or negative power；3rd lens can have positive light coke；4th lens can have positive light coke or negative power, Its image side surface is convex surface.The wide-angle camera uses anti-distance optical structure, lens group I (the first lens, two lens) light Focal power is negative, and lens group II (the 3rd lens, the 4th lens) focal power is just, off-axis ray passes through the hair of Group I negative lens After dissipating so that substantially diminished by Group II lens ray tilt, it is undertaken less visual field, be conducive to follow-up constituent element Off-axis aberration is corrected, and corresponding negative lens I groups then undertake larger visual field.By the positive and negative light for reasonably controlling each lens Focal power is distributed, not only can effectively balance control system low order aberration so that pick-up lens obtains preferably image quality, and And the characteristic of ultra-thin large aperture can be realized.

In the exemplary embodiment, effective half bore DT11 of the thing side of the first lens and pick-up lens electronics light sensation It can be met between the half ImgH of element effective pixel area diagonal line length：1.2<DT11/ImgH<2.6, more specifically, can enter One step meets 1.24≤DT11/ImgH≤2.56.By such configuration, reduce the first aperture of lens, improve wide-angle lens the The processing characteristics of one lens.

In the exemplary embodiment, it can expire between the effective focal length f of pick-up lens and the effective focal length f1 of the first lens Foot：-4<f1/f<- 2, more specifically, -2.84≤f1/f≤- 2.32 can further be met.By such configuration, be conducive to carrying High lens are shared to visual field, reduce subsequent lens ray tilt, are conducive to aberration correction.

In the exemplary embodiment, it can expire between the effective focal length f of pick-up lens and the Entry pupil diameters EPD of pick-up lens Foot：F/EPD≤1.8, more specifically, f/EPD≤1.19 can further be met., can be effective in imaging surface by such configuration Imaging surface energy density is improved, is conducive to improving image side sensor output signal signal to noise ratio, that is, the precision fathomed.

In the exemplary embodiment, the half ImgH of pick-up lens electronics light sensitive component effective pixel area diagonal line length It can be met between the effective focal length f of pick-up lens：Imgh/f>1, more specifically, Imgh/f >=1.19 can further be met.It is logical Such configuration is crossed, the angle of visual field can also be improved while miniaturization is ensured, realize the characteristic of wide-angle, improve depth survey model Enclose, and effectively correct all kinds of aberrations, so as to lift the image quality of pick-up lens.

In the exemplary embodiment, the radius of curvature R 2 of the image side surface of the first lens and the effective focal length f of pick-up lens Between can meet：1<R2/f<1.5, more specifically, 1.06≤R2/f≤1.38 can further be met.By such configuration, no It only can guarantee that pick-up lens has good processability, while bigger visual field can also effectively be undertaken so that wide-angular field's light The inclination angle of light is obviously reduced after the first lens, so as to be conducive to the correction of aberration.

In the exemplary embodiment, 0.2 can be met<CT1/(CT2+CT3+CT4)<0.5, more specifically, can be further 0.23≤CT1/ (CT2+CT3+CT4)≤0.37 is met, wherein, CT1 is center thickness of first lens on optical axis, and CT2 is Center thickness of second lens on optical axis, CT3 is center thickness of the 3rd lens on optical axis, and CT4 is the 4th lens Center thickness on optical axis.By reasonably distributing the center thickness of each lens, it can effectively ensure the processing technology of eyeglass, Especially for the first lens, image side surface flexibility is high, and machining eyeglass performance is difficult to ensure, thick by its center of reasonable disposition Degree, can reduce the thickness ratio of the eyeglass, optimize processability.

In the exemplary embodiment, it can meet：2<T12/T23<4, more specifically, 2.06≤T12/ can further be met T23≤3.75, wherein, T12 be the airspace of the first lens and the second lens on optical axis, and T23 be the second lens and Airspace of 3rd lens on optical axis.To distribute bigger the air gap between the first lens and the second lens, on the one hand It is due to that the first lens image side surface flexibility is high, rise is big, the need for assembling structure；The opposing party can reduce into the second lens again The incident angle of light, is conducive to the balance of aberration.

In the exemplary embodiment, the effective half bore DT32 and effective Jiao of the 3rd lens of the image side surface of the first lens Away from can be met between f3：0.1<DT32/f3<0.6, more specifically, 0.18≤DT32/f3≤0.55 can further be met.Pass through Such configuration, is conducive to improving correction of the lens three to full filed bore aberration, so as to improve image quality.

In the exemplary embodiment, 0.3 can be met<∑CT/TTL<0.6, more specifically, can further meet 0.35≤ ∑ CT/TTL≤0.46, wherein, ∑ CT is that the first lens to the 4th lens are respectively at the thickness summation on optical axis, and TTL Distance of the first lens thing side to imaging surface on optical axis.By such configuration, system entire length is advantageously reduced, together When the increase of the distance between lens advantageously reduce tolerance sensitivity, lifting batch production camera lens quality and uniformity.

In the exemplary embodiment, 0.9 can be met<SAG11/CT1<1.75, more specifically, 0.93 can further be met ≤ SAG11/CT1≤1.71, wherein, SAG11 is intersection point the having to the first lens thing side of the first lens thing side and optical axis The distance on optical axis between half bore summit is imitated, and CT1 is center thickness of first lens on optical axis.By rational The first lens thing side rise and its center thickness are configured, is conducive to improving the processability of the first lens.

In the exemplary embodiment, it is provided with infrared bandpass filter between the 4th lens and the imaging surface of pick-up lens Piece.Bandpass filter is in certain wave band, and only centre is a bit of is the passband of high-transmission rate, and in the both sides of passband, is The rejection zone of high reflectance.The appropriate of infrared band passes through, and system can be conducive to not introduce the influence of aberration, and control disc of confusion is straight Footpath, while infrared band is conducive to eliminating the interference of ambient visible light, so as to lift the image quality of camera lens.Matched somebody with somebody by such Put, it is ensured that effective identification of the pick-up lens in effective spectral range.

Infrared band is conducive to system not introduce aberration, disperse spot diameter is controlled, while infrared band advantageously reduces ring The interference of border visible ray, improves image side sensor output signal signal to noise ratio.

In the exemplary embodiment, pick-up lens is also provided with the aperture STO for confine optical beam, adjusts entering light Amount, improves image quality.Multi-disc eyeglass can be used according to the pick-up lens of the above-mentioned embodiment of the application, such as it is described above Four.Between on the axle between each power of lens of reasonable distribution, face type, the center thickness of each lens and each lens Away from etc., it can effectively expand the aperture of pick-up lens, reduce system sensitivity, ensure the miniaturization of camera lens and improve image quality, So that pick-up lens is more beneficial for producing and processing and being applicable to portable type electronic product.In presently filed embodiment In, at least one in the minute surface of each lens is aspherical mirror.The characteristics of non-spherical lens is：Curvature is from lens centre to week While being consecutive variations.Different from there is the spherical lens of constant curvature from lens centre to periphery, non-spherical lens has more preferably Radius of curvature characteristic, have the advantages that to improve and distort aberration and improve astigmatic image error, enable to the visual field to become much larger and true It is real.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve image quality. In addition, the use of non-spherical lens can also efficiently reduce the lens number in optical system.

However, it will be understood by those of skill in the art that without departing from this application claims technical scheme situation Under, the lens numbers for constituting camera lens can be changed, to obtain each result and the advantage described in this specification.For example, although It is described in embodiment by taking four lens as an example, but the pick-up lens is not limited to include four lens.If desired, The pick-up lens may also include the lens of other quantity.

The specific embodiment for the pick-up lens for being applicable to above-mentioned embodiment is further described with reference to the accompanying drawings.

Embodiment 1

The pick-up lens according to the embodiment of the present application 1 is described referring to Fig. 1 to Fig. 2 D.

Fig. 1 shows the structural representation of the pick-up lens according to the embodiment of the present application 1.As shown in figure 1, pick-up lens edge Optical axis is included from thing side to four lens L1-L4 into image side sequential.First lens L1 has thing side S1 and image side Face S2；Second lens L2 has thing side S3 and image side surface S4；3rd lens L3 has thing side S5 and image side surface S6；And the Four lens L4 have thing side S7 and image side surface S8.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Negative power；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

In the pick-up lens of the present embodiment, in addition to for confine optical beam, be arranged on the second lens and the 3rd lens Between aperture STO.It may include the infrared band logical filter with thing side S9 and image side surface S10 according to the pick-up lens of embodiment 1 Mating plate L5, optical filter L5 can be used for correction color error ratio.Light from object sequentially through each surface S1 to S10 and is ultimately imaged On imaging surface S11.

Table 1 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the pick-up lens of embodiment 1 Coefficient.

Table 1

Can be obtained by table 1, meet CT1/ (CT2+CT3+CT4)=0.37, wherein, CT1 be the first lens on optical axis in Heart thickness, CT2 is center thickness of second lens on optical axis, and CT3 is center thickness of the 3rd lens on optical axis, and CT4 is center thickness of the 4th lens on optical axis；T12/T23=2.38 is met, wherein, T12 is that the first lens and second are saturating Airspace of the mirror on optical axis, and T23 are the airspace of the second lens and the 3rd lens on optical axis；Meet ∑ CT/ TTL=0.37, wherein, ∑ CT is that the first lens to the 4th lens are saturating for first respectively at the thickness summation on optical axis, and TTL Distance of the mirror thing side to imaging surface on optical axis.

The present embodiment employs four lens as an example, by the focal length and face type of each eyeglass of reasonable distribution, effectively expanding The aperture of macro lens, shortens camera lens total length, it is ensured that the large aperture of camera lens and miniaturization；All kinds of aberrations are corrected simultaneously, are improved The resolution and image quality of camera lens.Each aspherical face type x is limited by below equation：

Wherein, x be it is aspherical along optical axis direction height be h position when, away from aspheric vertex of surface apart from rise；C is Aspherical paraxial curvature, c=1/R (that is, paraxial curvature c is the mean curvature radius R of upper table 1 inverse)；K be circular cone coefficient ( Provided in upper table 1)；Ai is the correction factor of aspherical i-th-th ranks.Table 2 below, which is shown, can be used for each minute surface in embodiment 1 S1-S16 high order term coefficient A₄、A₆、A₈、A₁₀、A₁₂、A₁₄And A₁₆。

Table 2

Face number

A4

A6

A8

A10

A12

A14

A16

S1

9.0896E-03

-1.8572E-03

2.2576E-04

-1.6382E-05

6.9608E-07

-1.5659E-08

1.3773E-10

S2

6.6559E-02

1.1050E-02

-1.1686E-02

1.5893E-03

1.3646E-03

-5.3140E-04

5.1939E-05

S3

-1.5764E-02

7.6595E-02

-1.0538E-01

9.1548E-02

-4.5284E-02

1.1060E-02

-1.0276E-03

S4

3.6271E-02

3.5495E-02

2.4384E-02

-9.8866E-02

1.3796E-01

-8.1950E-02

1.8408E-02

S5

-3.4757E-03

-2.3235E-03

9.9880E-03

-1.1401E-02

5.8129E-03

-1.3271E-03

1.0943E-04

S6

-1.9772E-03

-4.8667E-03

9.1691E-05

1.1064E-03

-7.0374E-04

3.6071E-05

2.8070E-05

S7

8.4778E-03

6.7589E-04

-4.8631E-04

5.0058E-04

-2.1360E-04

3.9971E-05

-3.0084E-06

S8

2.6080E-02

-1.0049E-03

1.0938E-03

-1.9456E-04

5.4199E-05

-1.5228E-05

1.2409E-06

Table 3 as shown below shows effective Jiao of the effective focal length f1 to f4 of each lens of embodiment 1, pick-up lens Thing side away from f, the half ImgH and the first lens L1 of pick-up lens electronics light sensitive component effective pixel area diagonal line length S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.

Table 3

It can be seen from table 3, the effective focal length f of pick-up lens and the effective focal length f1 of the first lens meet f1/f=-2.32； And the half ImgH of pick-up lens electronics light sensitive component effective pixel area diagonal line length and the effective focal length f of pick-up lens expire Sufficient Imgh/f=1.96.

With reference to upper table 1, table 3, in this embodiment, the effective focal length f of pick-up lens and the Entry pupil diameters EPD of pick-up lens Meet f/EPD=1.19；R2/f is met between the radius of curvature R 2 of the image side surface of first lens and the effective focal length f of pick-up lens =1.06；Effective half bore DT11 of the thing side of first lens and pick-up lens electronics light sensitive component effective pixel area are diagonal The half ImgH of line length meets DT11/ImgH=1.81；Effective half bore DT32 of the image side surface of first lens and the 3rd lens Effective focal length f3 meet DT32/f3=0.38；And SAG11/CT1=1.42 is met, wherein, SAG11 is the first lens thing Side and intersection point to the distance between effective half bore summit of the first lens thing side on optical axis, and CT1 of optical axis are Center thickness of first lens on optical axis.

Fig. 2A shows chromatic curve on the axle of the pick-up lens of embodiment 1, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Fig. 2 B show the astigmatism curve of the pick-up lens of embodiment 1, and it represents that meridianal image surface is curved The bending of bent and sagittal image surface.Fig. 2 C show the ratio chromatism, curve of the pick-up lens of embodiment 1, and it represents light via shooting The deviation of different image heights after camera lens on imaging surface.Fig. 2 D show the relative illumination of the optical imaging system of embodiment 1 Curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.Understood according to Fig. 2A to Fig. 2 D, Pick-up lens given by embodiment 1 can realize good image quality.

Embodiment 2

The pick-up lens according to the embodiment of the present application 2 is described referring to Fig. 3 to Fig. 4 D.Except each mirror of pick-up lens Outside the parameter of piece, such as except spacing, each minute surface on the radius of curvature of each eyeglass, thickness, circular cone coefficient, effective focal length, axle High order term coefficient etc. outside, pick-up lens described in the present embodiment 2 and following embodiment with described in embodiment 1 The arrangement of pick-up lens is identical.For brevity, by clipped description similar to Example 1.

Fig. 3 shows the structural representation of the pick-up lens according to the embodiment of the present application 2.As shown in figure 3, according to embodiment 2 pick-up lens includes the first to fourth lens L1-L4 respectively with thing side and image side surface.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Negative power；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

Table 4 below shows surface type, radius of curvature, thickness, material and the circle of each lens of the pick-up lens of embodiment 2 Bore coefficient.Table 5 shows the high order term coefficient of each aspherical mirror in embodiment 2.Table 6 shows each lens of embodiment 2 Effective focal length f1 to f4, the effective focal length f of pick-up lens, pick-up lens electronics light sensitive component effective pixel area diagonal line length Half ImgH and the first lens L1 thing side S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.Wherein, The formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.

Table 4

Table 5

Face number

A4

A6

A8

A10

A12

A14

A16

S1

3.2513E-03

-4.5464E-04

4.2215E-05

-2.4388E-06

8.5923E-08

-1.6933E-09

1.4186E-11

S2

4.9848E-02

-1.3412E-02

1.0110E-02

-5.0566E-03

1.4037E-03

-1.9848E-04

1.0821E-05

S3

-1.4665E-02

9.9528E-03

-4.6862E-03

2.5192E-03

-8.7415E-04

1.4724E-04

-9.1191E-06

S4

6.2869E-03

2.7600E-02

-3.7309E-02

4.0859E-02

-2.0944E-02

4.4792E-03

-7.9166E-05

S5

-9.0817E-03

2.7329E-03

1.0834E-04

-8.7680E-04

4.4106E-04

-8.5540E-05

5.5642E-06

S6

2.8477E-03

-1.5243E-03

-1.4190E-03

1.5157E-03

-6.4996E-04

1.2563E-04

-9.1310E-06

S7

7.4740E-03

-3.1040E-04

4.1243E-05

7.9709E-05

-3.6761E-05

5.9184E-06

-3.6407E-07

S8

1.7515E-02

-1.3089E-03

1.2461E-03

-4.1902E-04

9.5175E-05

-1.3557E-05

7.5094E-07

Table 6

Fig. 4 A show chromatic curve on the axle of the pick-up lens of embodiment 2, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Fig. 4 B show the astigmatism curve of the pick-up lens of embodiment 2, and it represents that meridianal image surface is curved The bending of bent and sagittal image surface.Fig. 4 C show the ratio chromatism, curve of the pick-up lens of embodiment 2, and it represents light via shooting The deviation of different image heights after camera lens on imaging surface.Fig. 4 D show the relative illumination of the optical imaging system of embodiment 2 Curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.Understood according to Fig. 4 A to Fig. 4 D, Pick-up lens given by embodiment 2 can realize good image quality.

Embodiment 3

The pick-up lens according to the embodiment of the present application 3 is described referring to Fig. 5 to Fig. 6 D.

Fig. 5 shows the structural representation of the pick-up lens according to the embodiment of the present application 3.As shown in figure 5, according to embodiment 3 pick-up lens includes the first to fourth lens L1-L4 respectively with thing side and image side surface.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Negative power；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

Table 7 below shows surface type, radius of curvature, thickness, material and the circle of each lens of the pick-up lens of embodiment 3 Bore coefficient.Table 8 shows the high order term coefficient of each aspherical mirror in embodiment 3.Table 9 shows each lens of embodiment 3 Effective focal length f1 to f4, the effective focal length f of pick-up lens, pick-up lens electronics light sensitive component effective pixel area diagonal line length Half ImgH and the first lens L1 thing side S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.Wherein, The formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.

Table 7

Table 8

Face number

A4

A6

A8

A10

A12

A14

A16

S1

3.0639E-03

-4.2897E-04

3.6579E-05

-1.8891E-06

5.7210E-08

-9.2621E-10

6.1598E-12

S2

3.3020E-02

2.1438E-02

-1.7283E-02

6.3738E-03

-1.2765E-03

1.2743E-04

-4.9399E-06

S3

-2.8101E-03

4.3988E-03

-6.2575E-04

-9.6177E-05

5.1653E-05

-6.9934E-06

3.1522E-07

S4

3.2139E-02

-2.5600E-02

5.9625E-02

-5.6882E-02

3.2139E-02

-9.7884E-03

1.3494E-03

S5

-4.5855E-03

4.7866E-03

-3.4627E-03

7.0056E-04

2.4138E-04

-1.3439E-04

1.7204E-05

S6

7.0539E-03

-8.9427E-03

5.4854E-03

-2.3146E-03

5.6748E-04

-7.4668E-05

4.0973E-06

S7

1.0550E-02

-4.4393E-03

2.6367E-03

-9.6763E-04

2.0214E-04

-2.2522E-05

1.0174E-06

S8

3.4444E-02

-8.0495E-03

5.5222E-03

-2.0976E-03

4.4774E-04

-5.3310E-05

2.6785E-06

Table 9

Fig. 6 A show chromatic curve on the axle of the pick-up lens of embodiment 3, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Fig. 6 B show the astigmatism curve of the pick-up lens of embodiment 3, and it represents that meridianal image surface is curved The bending of bent and sagittal image surface.Fig. 6 C show the ratio chromatism, curve of the pick-up lens of embodiment 3, and it represents light via shooting The deviation of different image heights after camera lens on imaging surface.Fig. 6 D show the relative illumination of the optical imaging system of embodiment 3 Curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.Understood according to Fig. 6 A to Fig. 6 D, Pick-up lens given by embodiment 3 can realize good image quality.

Embodiment 4

The pick-up lens according to the embodiment of the present application 4 is described referring to Fig. 7 to Fig. 8 D.

Fig. 7 shows the structural representation of the pick-up lens according to the embodiment of the present application 4.As shown in fig. 7, according to embodiment 4 pick-up lens includes the first to fourth lens L1-L4 respectively with thing side and image side surface.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Positive light coke；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

Table 10 below show the surface types of each lens of the pick-up lens of embodiment 4, radius of curvature, thickness, material and Circular cone coefficient.Table 11 shows the high order term coefficient of each aspherical mirror in embodiment 4.Table 12 shows each of embodiment 4 The effective focal length f1 to f4 of mirror, the effective focal length f of pick-up lens, pick-up lens electronics light sensitive component effective pixel area diagonal Long half ImgH and the first lens L1 thing side S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.Its In, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.

Table 10

Table 11

Table 12

Fig. 8 A show chromatic curve on the axle of the pick-up lens of embodiment 4, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Fig. 8 B show the astigmatism curve of the pick-up lens of embodiment 4, and it represents that meridianal image surface is curved The bending of bent and sagittal image surface.Fig. 8 C show the ratio chromatism, curve of the pick-up lens of embodiment 4, and it represents light via shooting The deviation of different image heights after camera lens on imaging surface.Fig. 8 D show the relative illumination of the optical imaging system of embodiment 4 Curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.Understood according to Fig. 8 A to Fig. 8 D, Pick-up lens given by embodiment 4 can realize good image quality.

Embodiment 5

The pick-up lens according to the embodiment of the present application 5 is described referring to Fig. 9 to Figure 10 D.

Fig. 9 shows the structural representation of the pick-up lens according to the embodiment of the present application 5.As shown in figure 9, according to embodiment 5 pick-up lens includes the first to fourth lens L1-L4 respectively with thing side and image side surface.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Negative power；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

Table 13 below show the surface types of each lens of the pick-up lens of embodiment 5, radius of curvature, thickness, material and Circular cone coefficient.Table 14 shows the high order term coefficient of each aspherical mirror in embodiment 5.Table 15 shows each of embodiment 5 The effective focal length f1 to f4 of mirror, the effective focal length f of pick-up lens, pick-up lens electronics light sensitive component effective pixel area diagonal Long half ImgH and the first lens L1 thing side S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.Its In, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.

Table 13

Table 14

Face number

A4

A6

A8

A10

A12

A14

A16

S1

2.1384E-03

-2.2186E-04

1.6081E-05

-7.2246E-07

1.9544E-08

-2.9176E-10

1.8335E-12

S2

4.9694E-02

-1.8166E-02

1.0744E-02

-4.0936E-03

8.7618E-04

-9.6852E-05

4.2168E-06

S3

3.0641E-03

6.0570E-03

5.2056E-03

-6.4292E-03

2.7779E-03

-5.6026E-04

4.2898E-05

S4

4.1470E-02

5.4833E-02

-1.5873E-01

3.7294E-01

-4.2781E-01

2.4066E-01

-5.1376E-02

S5

-7.3072E-03

1.4736E-02

-3.1459E-02

3.1680E-02

-1.6989E-02

4.6970E-03

-5.2720E-04

S6

6.5842E-03

-1.0501E-02

1.0133E-02

-6.6365E-03

2.3348E-03

-4.1229E-04

2.8803E-05

S7

6.2176E-03

-6.7460E-04

7.0277E-05

-1.1874E-05

-1.4441E-06

8.0554E-07

-6.5654E-08

S8

2.4820E-02

-4.3100E-04

9.1191E-05

1.2726E-04

-9.6160E-05

1.9715E-05

-1.3048E-06

Table 15

Figure 10 A show chromatic curve on the axle of the pick-up lens of embodiment 5, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Figure 10 B show the astigmatism curve of the pick-up lens of embodiment 5, and it represents meridianal image surface Bending and sagittal image surface bending.Figure 10 C show the ratio chromatism, curve of the pick-up lens of embodiment 5, its represent light via The deviation of different image heights after pick-up lens on imaging surface.Figure 10 D show the relative of the optical imaging system of embodiment 5 Illumination curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.According to Figure 10 A to Figure 10 D Understand, the pick-up lens given by embodiment 5 can realize good image quality.

Embodiment 6

The pick-up lens according to the embodiment of the present application 6 is described referring to Figure 11 to Figure 12 D.

Figure 11 shows the structural representation of the pick-up lens according to the embodiment of the present application 6.As shown in figure 11, according to implementation The pick-up lens of example 6 includes the first to fourth lens L1-L4 respectively with thing side and image side surface.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Positive light coke；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

Table 16 below show the surface types of each lens of the pick-up lens of embodiment 6, radius of curvature, thickness, material and Circular cone coefficient.Table 17 shows the high order term coefficient of each aspherical mirror in embodiment 6.Table 18 shows each of embodiment 6 The effective focal length f1 to f4 of mirror, the effective focal length f of pick-up lens, pick-up lens electronics light sensitive component effective pixel area diagonal Long half ImgH and the first lens L1 thing side S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.Its In, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.

Table 16

Table 17

Face number

A4

A6

A8

A10

A12

A14

A16

S1

2.8326E-03

-3.8322E-04

3.0792E-05

-1.5285E-06

4.5787E-08

-7.5440E-10

5.2004E-12

S2

3.0314E-02

9.3579E-03

-6.1721E-03

1.6901E-03

-2.1926E-04

8.9511E-06

1.6549E-07

S3

-1.1786E-02

8.4173E-03

-6.8939E-03

3.3622E-03

-9.1495E-04

1.2473E-04

-6.5343E-06

S4

1.0962E-02

2.7741E-02

-2.6194E-02

-2.7232E-03

3.8351E-02

-3.0724E-02

7.8680E-03

S5

-1.7652E-02

6.3507E-03

-1.0055E-02

9.3664E-03

-5.2212E-03

1.4764E-03

-1.5336E-04

S6

1.7395E-02

-3.1350E-02

3.6916E-02

-2.8163E-02

1.2375E-02

-2.9380E-03

2.8134E-04

S7

1.0345E-04

-4.2773E-04

9.7356E-05

-4.0435E-05

6.2739E-22

1.3153E-24

2.7568E-27

S8

7.9194E-03

1.5622E-03

-5.8276E-04

1.8911E-04

-2.9855E-05

1.6626E-06

1.6721E-08

Table 18

Figure 12 A show chromatic curve on the axle of the pick-up lens of embodiment 6, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Figure 12 B show the astigmatism curve of the pick-up lens of embodiment 6, and it represents meridianal image surface Bending and sagittal image surface bending.Figure 12 C show the ratio chromatism, curve of the pick-up lens of embodiment 6, its represent light via The deviation of different image heights after pick-up lens on imaging surface.Figure 12 D show the relative of the optical imaging system of embodiment 6 Illumination curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.According to Figure 12 A to Figure 12 D Understand, the pick-up lens given by embodiment 6 can realize good image quality.

Embodiment 7

The pick-up lens according to the embodiment of the present application 7 is described referring to Figure 13 to Figure 14 D.

Figure 13 shows the structural representation of the pick-up lens according to the embodiment of the present application 7.As shown in figure 13, according to implementation The pick-up lens of example 7 includes the first to fourth lens L1-L4 respectively with thing side and image side surface.

In this embodiment, the first lens L1 can have negative power, and its image side surface is concave surface；Second lens L2 can have Positive light coke；3rd lens L3 can have positive light coke；4th lens L4 can have positive light coke, and its image side surface is convex surface.

Table 19 below show the surface types of each lens of the pick-up lens of embodiment 7, radius of curvature, thickness, material and Circular cone coefficient.Table 20 shows the high order term coefficient of each aspherical mirror in embodiment 7.Table 21 shows each of embodiment 7 The effective focal length f1 to f4 of mirror, the effective focal length f of pick-up lens, pick-up lens electronics light sensitive component effective pixel area diagonal Long half ImgH and the first lens L1 thing side S1 to pick-up lens imaging surface S11 on optical axis apart from TTL.Its In, the formula (1) that each aspherical face type can be provided in above-described embodiment 1 is limited.

Table 19

Table 20

Face number

A4

A6

A8

A10

A12

A14

A16

S1

1.6078E-03

-9.4060E-05

1.6946E-07

2.2964E-07

-1.1524E-08

2.4903E-10

-2.1076E-12

S2

2.8880E-02

3.5396E-04

2.3023E-03

-1.4583E-03

3.5786E-04

-4.3033E-05

2.0259E-06

S3

-1.1629E-02

1.7868E-03

1.4356E-03

-7.1308E-04

1.5202E-04

-1.5733E-05

6.3215E-07

S4

6.5089E-03

-7.9948E-03

2.2589E-02

-2.0025E-02

9.0602E-03

-2.0435E-03

1.8278E-04

S5

-4.6352E-03

4.2142E-02

-6.8807E-02

6.0973E-02

-3.1156E-02

8.8413E-03

-1.1013E-03

S6

1.7626E-02

-1.5255E-02

1.6510E-02

-1.0828E-02

3.8139E-03

-6.6279E-04

4.4242E-05

S7

-9.8144E-03

1.2765E-02

-6.9785E-03

2.5035E-03

-5.1719E-04

5.3968E-05

-2.2004E-06

S8

2.1108E-02

6.0356E-03

-4.7701E-03

2.9616E-03

-9.6797E-04

1.6782E-04

-1.2035E-05

Table 21

Figure 14 A show chromatic curve on the axle of the pick-up lens of embodiment 7, and it represents the light of different wave length via taking the photograph As the converging focal point after camera lens deviates.Figure 14 B show the astigmatism curve of the pick-up lens of embodiment 7, and it represents meridianal image surface Bending and sagittal image surface bending.Figure 14 C show the ratio chromatism, curve of the pick-up lens of embodiment 7, its represent light via The deviation of different image heights after pick-up lens on imaging surface.Figure 14 D show the relative of the optical imaging system of embodiment 7 Illumination curve, its represent on the optical axis of camera lens, that is, the image at picture center light levels.According to Figure 14 A to Figure 14 D Understand, the pick-up lens given by embodiment 7 can realize good image quality.

To sum up, embodiment 1 to embodiment 7 meets the relation shown in table 22 below respectively.

Table 22

Conditional embodiment	1	2	3	4	5	6	7
								f/EPD	1.19	1.19	0.99	1.19	1.19	1.19	1.19
f1/f	-2.32	-2.40	-2.75	-2.62	-2.84	-2.49	-2.51
								ImgH/f	1.96	1.84	2.22	1.19	2.28	1.79	1.97
R2/f	1.06	1.13	1.21	1.11	1.38	1.17	1.20
								CT1/(CT2+CT3+CT4)	0.37	0.25	0.23	0.31	0.24	0.27	0.24
T12/T23	2.38	2.92	2.06	2.50	2.33	3.75	3.40
								DT11/ImgH	1.81	2.15	2.23	1.24	2.56	2.35	2.42
DT32/f3	0.38	0.50	0.49	0.45	0.55	0.43	0.18
								∑CT/TTL	0.37	0.42	0.45	0.35	0.46	0.40	0.43
SAG11/CT1	1.42	1.22	1.71	0.93	1.68	1.10	1.14

Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art Member should be appreciated that invention scope involved in the application, however it is not limited to the technology of the particular combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, is carried out by above-mentioned technical characteristic or its equivalent feature Other technical schemes formed by any combination.Such as features described above has similar work(with (but not limited to) disclosed herein The technical characteristic of energy carries out technical scheme formed by replacement mutually.

Claims (13)

1. pick-up lens, sequentially includes first with effective focal length f and Entry pupil diameters EPD, and along optical axis by thing side to image side Lens, the second lens, the 3rd lens and the 4th lens,

Characterized in that,

First lens have negative power, and its image side surface is concave surface；

Second lens have positive light coke or negative power；

3rd lens have positive light coke；

4th lens have positive light coke or negative power, and its image side surface is convex surface；And

Effective half bore DT11 of the thing side of first lens and the pick-up lens electronics light sensitive component effective pixel region Met between the half ImgH of domain diagonal line length：1.2<DT11/ImgH<2.6.

2. pick-up lens according to claim 1, it is characterised in that the effective focal length f of the pick-up lens takes the photograph with described Met between the Entry pupil diameters EPD of picture camera lens：f/EPD≤1.8.

3. pick-up lens according to claim 1, it is characterised in that the effective focal length f of the pick-up lens and described the Met between the effective focal length f1 of one lens：-4<f1/f<-2.

4. pick-up lens according to any one of claim 1 to 3, it is characterised in that the pick-up lens electronics light sensation Met between the half ImgH of element effective pixel area diagonal line length and the effective focal length f of the pick-up lens：Imgh/f>1.

5. pick-up lens according to claim 4, it is characterised in that the radius of curvature R 2 of the image side surface of first lens Met between the effective focal length f of the pick-up lens：1<R2/f<1.5.

6. pick-up lens according to claim 4, it is characterised in that meet 0.2<CT1/(CT2+CT3+CT4)<0.5,

Wherein, CT1 is center thickness of first lens on the optical axis,

CT2 is center thickness of second lens on the optical axis,

CT3 is center thickness of the 3rd lens on the optical axis, and

CT4 is center thickness of the 4th lens on the optical axis.

7. pick-up lens according to claim 6, it is characterised in that meet：2<T12/T23<4,

Wherein, T12 is the airspace of first lens and second lens on the optical axis, and

T23 is the airspace of second lens and the 3rd lens on the optical axis.

8. pick-up lens according to claim 4, it is characterised in that effective half bore of the image side surface of first lens Met between the effective focal length f3 of DT32 and the 3rd lens：0.1<DT32/f3<0.6.

9. pick-up lens according to claim 4, it is characterised in that meet 0.3<∑CT/TTL<0.6,

Wherein, ∑ CT be first lens to the 4th lens respectively at the thickness summation on the optical axis, and

TTL is distance of the first lens thing side to imaging surface on the optical axis.

10. pick-up lens according to claim 4, it is characterised in that meet 0.9<SAG11/CT1<1.75,

Wherein, SAG11 be the first lens thing side and the optical axis intersection point it is effective to the first lens thing side Distance between half bore summit on the optical axis, and

CT1 is center thickness of first lens on the optical axis.

11. pick-up lens according to any one of the preceding claims, it is characterised in that the 4th lens are taken the photograph with described As camera lens imaging surface between be provided with infrared band pass filter.

12. pick-up lens, sequentially includes first with effective focal length f and Entry pupil diameters EPD, and along optical axis by thing side to image side Lens, the second lens, the 3rd lens and the 4th lens,

Characterized in that,

First lens have negative power, and its image side surface is concave surface；

3rd lens have positive light coke；

The image side surface of 4th lens is convex surface；

The combination focal power of first lens and second lens is negative；

The combination focal power of 3rd lens and the 4th lens is just；And

Met between effective half bore DT32 of the image side surface of first lens and the effective focal length f3 of the 3rd lens： 0.1<DT32/f3<0.6。

13. pick-up lens, sequentially includes first with effective focal length f and Entry pupil diameters EPD, and along optical axis by thing side to image side Lens, the second lens, the 3rd lens and the 4th lens,

Characterized in that,

First lens have negative power, and its image side surface is concave surface；

3rd lens have positive light coke；

The image side surface of 4th lens is convex surface；

The combination focal power of first lens and second lens is negative；

The combination focal power of 3rd lens and the 4th lens is just；And

Meet 0.9<SAG11/CT1<1.75,

Wherein, SAG11 be the first lens thing side and the optical axis intersection point it is effective to the first lens thing side Distance between half bore summit on the optical axis, and

CT1 is center thickness of first lens on the optical axis.