CN206930825U

CN206930825U - Pick-up lens

Info

Publication number: CN206930825U
Application number: CN201720870774.9U
Authority: CN
Inventors: 黄林
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-07-18
Filing date: 2017-07-18
Publication date: 2018-01-26
Anticipated expiration: 2027-07-18

Abstract

This application discloses a kind of pick-up lens, the pick-up lens is sequentially included along optical axis by thing side to image side：The first lens, the second lens, the 3rd lens and the 4th lens with focal power.Wherein, at least one in the first lens and the second lens has positive light coke；The thing side of 3rd lens and the image side surface of the 4th lens are concave surface；And total effective focal length f of the half ImgH of effective pixel area diagonal line length and pick-up lens meets ImgH/f ＞ 1 on the imaging surface of pick-up lens.

Description

Pick-up lens

Technical field

The present invention relates to a kind of pick-up lens, more particularly it relates to a kind of wide-angle imaging for including four lens Camera lens.

Background technology

With the development of the chip technologies such as CCD or CMOS, pick-up lens is also gradually toward miniaturization, lightweight and high pixel neck Domain is developed.In some application fields, also the big field range of camera lens is proposed it is corresponding require, it is necessary to camera lens meet it is small There is wide angle characteristic while type and high image quality.In addition, in order to realize stable mass production, it is also necessary to which camera lens has Good sensitivity.

In order to realize wide angle characteristic, it will usually expand the angle of visual field of camera lens by the way of lens number is increased, but This mode is unfavorable for realizing the miniaturization and lightweight of camera lens；Meanwhile lens number excessively can also have to reducing all kinds of aberrations Limited, be unfavorable for improving the image quality of camera lens.

Therefore, it is necessary on the premise of excessively stationary lens piece number is not increased, there is provided it is a kind of it is compact-sized, high as matter, it is low The wide-angle camera of susceptibility.

Utility model content

This application provides be applicable to portable type electronic product, can at least solve or part solve it is of the prior art The pick-up lens of above-mentioned at least one shortcoming, such as wide-angle lens.

The one side of the application provides such a pick-up lens, the pick-up lens along optical axis by thing side to image side according to Sequence includes：The first lens, the second lens, the 3rd lens and the 4th lens with focal power.Wherein, the first lens and second At least one in lens has positive light coke；The thing side of 3rd lens and the image side surface of the 4th lens can be concave surface； And total effective focal length f of the half ImgH of effective pixel area diagonal line length and pick-up lens can on the imaging surface of pick-up lens Meet ImgH/f ＞ 1.

In one embodiment, the first lens and the second lens can have positive light coke；Effective Jiao of first lens Effective focal length f2 away from f1 and the second lens can meet 3 ＜ f1/f2≤7.

In one embodiment, the radius of curvature of the lens image side surface of radius of curvature R 5 and the 3rd of the 3rd lens thing side R6 can meet 0.7 ＜ R5/R6 ＜ 1.2.

In one embodiment, pick-up lens may also include the diaphragm being arranged between the first lens and the second lens.

In one embodiment, the thing side of the first lens can be convex surface, and the image side surface of the second lens can be convex surface.

In one embodiment, the second lens are in the center thickness CT2 and the thing side of the first lens on optical axis Distance TTL of the heart to pick-up lens imaging surface on optical axis can meet 0.1 ＜ CT2/TTL ＜ 0.22.

In one embodiment, the spacing distance T12 and the first lens of the first lens and the second lens on optical axis Distance TTL of the center of thing side to pick-up lens imaging surface on optical axis can meet 0.8 ＜ (T12*10)/TTL ＜ 1.5.

In one embodiment, the edge thickness ET4 of the 4th lens and the 4th lens are in the center thickness CT4 on optical axis 1 ＜ ET4/CT4 ＜ 1.5 can be met.

In one embodiment, effectively the half of the effective radius DT12 of the first lens image side surface and the second lens image side surface Footpath DT22 can meet 0.7 ＜ DT12/DT22 ＜ 1.3.

In one embodiment, effectively the half of the effective radius DT11 of the first lens thing side and the 3rd lens image side surface Footpath DT32 can meet 0.9 ＜ DT11/DT32 ＜ 1.3.

In one embodiment, the intersection point of the 4th lens image side surface and optical axis to the 4th lens image side surface effective radius Distance SAG42 and fourth lens of the summit on optical axis can meet 0.2 ＜ SAG42/CT4 ＜ in the center thickness CT4 on optical axis 0.6。

In one embodiment, pick-up lens, which may also include, is arranged between the 4th lens and pick-up lens imaging surface Bandpass filter, the band-pass wavelength scope of the bandpass filter can be 400nm to 800nm.

Further aspect of the application provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to image side Sequentially include：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens can have There is positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have just Focal power or negative power, its image side surface can be concave surface；And the 4th lens edge thickness ET4 and the 4th lens on optical axis Center thickness CT4 can meet 1 ＜ ET4/CT4 ＜ 1.5.

In one embodiment, the thing side of the first lens can be convex surface, and the image side surface of the second lens can be convex surface；Take the photograph As camera lens may also include the diaphragm being arranged between the first lens and the second lens.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can meet 3 ＜ f1/f2≤7。

In one embodiment, pick-up lens, which may also include, is arranged between the 4th lens and pick-up lens imaging surface Bandpass filter.

In one embodiment, the band-pass wavelength scope of bandpass filter can be 400nm to 800nm.

In one embodiment, on the imaging surface of pick-up lens the half ImgH of effective pixel area diagonal line length with taking the photograph As total effective focal length f of camera lens can meet ImgH/f ＞ 1.

Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have Positive light coke or negative power, its image side surface can be concave surface；And first lens image side surface effective radius DT12 and second it is saturating The effective radius DT22 of mirror image side can meet 0.7 ＜ DT12/DT22 ＜ 1.3.

Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have Positive light coke or negative power, its image side surface can be concave surface；And first lens thing side effective radius DT11 and the 3rd it is saturating The effective radius DT32 of mirror image side can meet 0.9 ＜ DT11/DT32 ＜ 1.3.

Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have Positive light coke or negative power, its image side surface can be concave surface；And the 4th lens image side surface and optical axis intersection point to the 4th lens Distance SAG42 of the effective radius summit of image side surface on optical axis can meet with the 4th lens in the center thickness CT4 on optical axis 0.2 ＜ SAG42/CT4 ＜ 0.6.

Further aspect of the application additionally provides such a pick-up lens, and the pick-up lens is along optical axis by thing side to picture Side sequentially includes：First lens, the second lens, the 3rd lens and the 4th lens.Wherein, the first lens and the second lens With positive light coke；3rd lens can have positive light coke or negative power, and its thing side can be concave surface；4th lens can have Positive light coke or negative power, its image side surface can be concave surface.The pick-up lens, which may also include, is arranged at the 4th lens and camera lens Bandpass filter between head imaging surface, the band-pass wavelength scope of the bandpass filter can be 400nm to 800nm.

The application employs multi-disc (for example, four) lens, by each power of lens of reasonable distribution, face type, each Spacing etc. on axle between the center thickness of mirror and each lens, it can make pick-up lens that there is following at least one advantage：

Expand the angle of visual field, realize the wide angle of camera lens；

It is compact-sized, realize the miniaturization of camera lens；

Reduce the susceptibility of camera lens；And

All kinds of aberrations are corrected, lift the image quality of camera lens.

Brief description of the drawings

With reference to accompanying drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings：

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

Fig. 2A to Fig. 2 C respectively illustrates chromatic curve on the axle of the pick-up lens of embodiment 1, astigmatism curve and distortion Curve；

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

Fig. 4 A to Fig. 4 C respectively illustrate chromatic curve on the axle of the pick-up lens of embodiment 2, astigmatism curve and distortion Curve；

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

Fig. 6 A to Fig. 6 C respectively illustrate chromatic curve on the axle of the pick-up lens of embodiment 3, astigmatism curve and distortion Curve；

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

Fig. 8 A to Fig. 8 C respectively illustrate chromatic curve on the axle of the pick-up lens of embodiment 4, astigmatism curve and distortion Curve.

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 the simply illustrative embodiments 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, third, etc. is only used for a feature and another spy Sign makes a distinction, and does not indicate that any restrictions to feature.Therefore, in the case of without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the 3rd 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 and non-critical drawn to scale.

Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define the convex surface position When putting, then it represents that the lens surface is extremely convex surface less than near axis area；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is extremely concave surface less than near axis area.It is referred to as thing side near the surface of object in each lens, It is referred to as image side surface near the surface of imaging surface in each lens.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory Represent stated feature, element and/or part be present when being used in bright book, but do not preclude the presence or addition of one or more Further feature, element, part and/or combinations thereof.In addition, ought the statement of such as " ... at least one " appear in institute When after the list of row feature, whole listed feature, rather than the individual component in modification list are modified.In addition, work as description originally During the embodiment of application, represented " one or more embodiments of the application " using "available".Also, term " exemplary " It is intended to refer to example or illustration.

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 (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 so limiting herein.

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 feature of the application, principle and other aspects are described in detail below.

According to the pick-up lens of the application illustrative embodiments include such as four have focal power lens, i.e., first Lens, the second lens, the 3rd lens and the 4th lens.This four lens are along optical axis from thing side to image side sequential.This is taken the photograph As camera lens can also further comprise the photo-sensitive cell that is arranged at imaging surface.

In the exemplary embodiment, the first lens can have positive light coke；Second lens can have positive light coke；3rd Lens have positive light coke or negative power, and its thing side can be concave surface；And the 4th lens there is positive light coke or negative light focus Degree, its image side surface can be concave surface.

Pick-up lens can further comprise the diaphragm being arranged between the first lens and the second lens, further to lift mirror The image quality of head.Alternatively, the thing side of the first lens can be convex surface, and image side surface can be concave surface；The thing side of second lens Can be concave surface, image side surface can be convex surface.Pass through such setting so that the first lens and the second lens are formed centered on diaphragm The structure of near symmetrical, so as to effectively reduce camera lens susceptibility.

3 ＜ f1/f2≤7 can be met between the effective focal length f1 of first lens and the effective focal length f2 of the second lens, more Body, f1 and f2 can further meet 5.66≤f1/f2≤7.00.By f1 and f2 Ratio control in the reasonable scope, can have Effect avoids the excessively concentration of focal power, reduces the susceptibility of camera lens, and can lift the image quality of camera lens.

It can meet between the radius of curvature R 6 of the image side surface of the lens of radius of curvature R 5 and the 3rd of the thing side of 3rd lens 0.7 ＜ R5/R6 ＜ 1.2, more specifically, R5 and R6 can further meet 0.72≤R5/R6≤1.14, to reduce camera lens sensitivity Degree, lift camera lens quality.

The optics total length TTL of center thickness CT2 and pick-up lens on second lens and optical axis be (that is, the first lens The center of thing side to the imaging surface of pick-up lens the distance on optical axis) between can meet 0.1 ＜ CT2/TTL ＜ 0.22, More specifically, CT2 and TTL can further meet 0.14≤CT2/TTL≤0.21.Reasonable disposition CT2 and TTL are advantageous to shorten mirror The optics total length of head, realize miniaturization and wide angle.

Between the spacing distance T12 and pick-up lens of first lens and the second lens on optical axis optics total length TTL 0.8 ＜ (T12*10)/TTL ＜ 1.5 can be met, more specifically, T12 and TTL can further meet 0.81≤(T12*10)/TTL ≤1.49.Reasonable disposition T12 and TTL may be such that camera lens has more compact structure, while can reduce the susceptibility of camera lens, carry Rise image quality.

The edge thickness ET4 and the 4th lens of 4th lens can meet 1 ＜ ET4/ between the center thickness CT4 on optical axis CT4 ＜ 1.5, more specifically, ET4 and CT4 can further meet 1.08≤ET4/CT4≤1.36, to realize to chief ray angle Correction, lift the relative illumination of camera lens.

Alternatively, the image side surface of the 4th lens can (that is, the image side surface of the 4th lens be by center with least one point of inflexion At least have to edge by the convex variation tendency of concave change) so that the image side surface of the 4th lens is at paraxial place for concave surface and remote It is convex surface at the periphery of optical axis, so as to be effectively reduced susceptibility；Meanwhile such face type arrangement can also be suppressed effectively off axis The angle of field rays incidence photo-sensitive cell, increases the receiving efficiency of photo-sensitive cell, and further corrects the aberration of off-axis visual field.

Can between the effective radius DT22 of the effective radius DT12 of the image side surface of first lens and the image side surface of the second lens Meet 0.7 ＜ DT12/DT22 ＜ 1.3, more specifically, DT12 and DT22 can further meet 0.78≤DT12/DT22≤1.27, The effect of to realize wide-angle.

Can between the effective radius DT32 of the effective radius DT11 of the thing side of first lens and the image side surface of the 3rd lens Meet 0.9 ＜ DT11/DT32 ＜ 1.3, more specifically, DT11 and DT32 can further meet 1.00≤DT11/DT32≤1.20, To reduce the susceptibility of camera lens, image quality is lifted.

The image side surface of 4th lens and the intersection point of optical axis are to the effective radius summit of the image side surface of the 4th lens on optical axis Distance SAG42 and the 4th lens can meet 0.2 ＜ SAG42/CT4 ＜ 0.6 between the center thickness CT4 on optical axis, more Body, SAG42 and CT4 can further meet 0.29≤SAG42/CT4≤0.58.Reasonable disposition SAG42 and CT4 can effectively drop The susceptibility of low camera lens, lift image quality.

The half ImgH of the effective pixel area diagonal line length of photo-sensitive cell and pick-up lens on pick-up lens imaging surface Meet ImgH/f ＞ 1 between total effective focal length f, more specifically, ImgH and f can further meet 1.10≤ImgH/f≤1.13, To realize imaging of the photo-sensitive cell to larger thing side space.

Alternatively, above-mentioned pick-up lens may also include the optical filter being arranged between the 4th lens and imaging surface, the optical filtering Piece can be bandpass filter, and its band-pass wavelength can be about 400nm to about 800nm.Optical filter can be used for filtering unwanted spectrum Scope, so as to lift the image quality of camera lens.

Alternatively, above-mentioned pick-up lens may also include for protecting the protective glass positioned at photo-sensitive cell on imaging surface.

Alternatively, in order to meet light-weighted requirement, each lens in above-mentioned pick-up lens can use glass lens.

Pick-up lens described above uses such as four lens, can effectively avoid due to number of lenses is excessive and caused by The problem of camera lens volume is excessive and quality is overweight, and it is advantageously implemented the miniaturization and lightweight of camera lens.It is each by reasonable distribution Power of lens, face type, spacing etc. on the axle between the center thickness of each lens and each lens, according to the above-mentioned reality of the application Applying the pick-up lens of mode while image quality is ensured, can realize the expansion of the angle of view, lens optical total length Shorten the reduction with camera lens susceptibility, it is a kind of being applicable to Portable device so as to provide, it is compact-sized, high as matter, muting sensitive The wide-angle camera of sensitivity.

In presently filed embodiment, at least one in the minute surface of each lens is aspherical mirror.Non-spherical lens The characteristics of be：It is consecutive variations from lens centre to periphery curvature.With there is the sphere of constant curvature from lens centre to periphery Lens are different, and non-spherical lens has more preferably radius of curvature characteristic, and there is improvement to distort aberration and improve the excellent of astigmatic image error Point.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve pick-up lens Image quality.

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 forming pick-up lens can be changed, to obtain each result and advantage described in this specification.Though for example, So it is described in embodiments by taking four lens as an example, but the pick-up lens is not limited to include four lens.If Need, 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

Pick-up lens referring to Fig. 1 to Fig. 2 C descriptions according to the embodiment of the present application 1.Fig. 1 is shown according to the application The structural representation of the pick-up lens of embodiment 1.

As shown in figure 1, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11 Part.

First lens L1 has positive light coke, and its thing side S1 is convex surface, and image side surface S2 is concave surface, and the first lens L1 Thing side S1 and image side surface S2 be aspherical.

Second lens L2 has positive light coke, and its thing side S3 is concave surface, and image side surface S4 is convex surface, and the second lens L2 Thing side S3 and image side surface S4 be aspherical.

3rd lens L3 has positive light coke, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3 Thing side S5 and image side surface S6 be aspherical.

4th lens L4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Thing side S7 and image side surface S8 be aspherical.

Alternatively, pick-up lens may also include the optical filter L5 with thing side S9 and image side surface S10.Optical filter L5 can be Bandpass filter, its band-pass wavelength may range from about 400nm to about 800nm.

Alternatively, the diaphragm STO of confine optical beam can be provided between the first lens L1 and the second lens L2, with lifting The image quality of pick-up lens.

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, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 1

As shown in Table 1, the 3rd lens L3 thing side S5 lens L3 of radius of curvature R 5 and the 3rd image side surface S6 song Meet R5/R6=0.76 between rate radius R6.

In the present embodiment, each aspherical face type x is limited by below equation：

Wherein, x be it is aspherical along optical axis direction when being highly h position, 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 table 1)；Ai is the correction factor of aspherical i-th-th ranks.Table 2 below is given available for each aspherical in embodiment 1 Minute surface S1-S8 high order term coefficient A₄、A₆、A₈、A₁₀、A₁₂、A₁₄And A₁₆。

Face number

A4

A6

A8

A10

A12

A14

A16

S1

2.9247E-02

1.5296E-02

-2.4691E-02

1.9903E-02

-1.4463E-04

-5.9714E-03

2.2840E-03

S2

1.1008E-01

-1.4043E-01

9.9462E-02

2.7193E-01

-7.8784E-01

7.8026E-01

-2.8649E-01

S3

-2.1330E-01

-2.3131E-01

-4.4516E-01

3.0224E-01

5.0344E-12

5.7851E-13

-5.3988E-13

S4

-4.8956E-02

3.2558E-01

-3.6404E-01

5.8302E-02

4.8752E-02

1.8133E-09

3.0810E-10

S5

1.2505E-01

-1.3994E-01

3.2332E-01

-1.6067E-01

-1.1485E-03

1.9611E-03

6.5385E-03

S6

-3.8901E-02

4.7375E-02

-9.1492E-02

5.0488E-02

9.3052E-04

8.3495E-05

6.9163E-05

S7

-2.0272E-01

6.4779E-02

-2.8490E-02

6.9829E-03

-6.7768E-04

1.3197E-05

-2.2037E-06

S8

-2.0575E-01

8.1546E-02

-3.5375E-02

1.0383E-02

-1.9585E-03

2.0925E-04

-9.5339E-06

Table 2

Table 3 below provides total effective focal length f of the pick-up lens of embodiment 1, effective focal length f1 to f4, the camera lens of each lens Optics total length TTL (that is, the distance from the first lens L1 thing side S1 to imaging surface S11 on optical axis), the camera lens of head Half ImgH, the maximum angle of half field-of view of pick-up lens of the effective pixel area diagonal line length of photo-sensitive cell on head imaging surface S11 HFOV and pick-up lens F-number Fno.

Parameter	f(mm)	f1(mm)	f2(mm)	f3(mm)	f4(mm)
						Numerical value	2.14	14.01	2.35	73.90	13.91
Parameter	TTL(mm)	ImgH(mm)	HFOV(°)	Fno
						Numerical value	4.59	2.42	50.23	2.25

Table 3

It can be obtained according to table 3, meet f1/ between the first lens L1 effective focal length f1 and the second lens L2 effective focal length f2 F2=5.97；The half ImgH and camera lens of the effective pixel area diagonal line length of photo-sensitive cell on pick-up lens imaging surface S11 Meet ImgH/f=1.13 between total effective focal length f of head.It can be obtained by table 1 and table 3, the second lens L2 is thick in the center on optical axis Meet CT2/TTL=0.15 between degree CT2 and the optics total length TTL of pick-up lens；First lens L1 and the second lens L2 exist Meet (T12*10)/TTL=1.10 between the optics total length TTL of spacing distance T12 and pick-up lens on optical axis.

In embodiment 1, the 4th lens L4 edge thickness ET4 and the 4th lens L4 is in the center thickness CT4 on optical axis Between meet ET4/CT4=1.09；First lens L1 image side surface S2 effective radius DT12 and the second lens L2 image side surface Meet DT12/DT22=0.99 between S4 effective radius DT22；First lens L1 thing side S1 effective radius DT11 with Meet DT11/DT32=1.00 between 3rd lens L3 image side surface S6 effective radius DT32；4th lens L4 image side surfaces S8 With distance SAG42 and the 4th lens L4 on intersection point to the axle on the 4th lens L4 image side surfaces S8 effective radius summit of optical axis in light Meet SAG42/CT4=0.58 between center thickness CT4 on axle.

In the present embodiment, HFOV=50.23 ° of the maximum angle of half field-of view of pick-up lens, there is larger field scope.

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 mirror Converging focal point after head deviates.Fig. 2 B show the astigmatism curve of the pick-up lens of embodiment 1, its represent meridianal image surface bending and Sagittal image surface is bent.Fig. 2 C show the distortion curve of the pick-up lens of embodiment 1, and it represents the distortion in the case of different visual angles Sizes values.Understand that the pick-up lens given by embodiment 1 can realize good image quality according to Fig. 2A to Fig. 2 C.

Embodiment 2

Pick-up lens referring to Fig. 3 to Fig. 4 C descriptions according to the embodiment of the present application 2.In the present embodiment and following implementation In example, for brevity, by clipped description similar to Example 1.Fig. 3 shows taking the photograph according to the embodiment of the present application 2 As the structural representation of camera lens.

As shown in figure 3, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11 Part.

Second lens L2 has positive light coke, and its thing side S3 is convex surface, and image side surface S4 is convex surface, and the second lens L2 Thing side S3 and image side surface S4 be aspherical.

Table 4 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the pick-up lens of embodiment 2 Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 5 is shown available for each aspherical mirror in embodiment 2 The high order term coefficient in face, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.Table 6 is shown Total effective focal length f of the pick-up lens of embodiment 2, the effective focal length f1 to f4 of each lens, the optics total length of pick-up lens The half ImgH of the effective pixel area diagonal line length of photo-sensitive cell, pick-up lens be most on TTL, pick-up lens imaging surface S11 Big angle of half field-of view HFOV and pick-up lens F-number Fno.

Table 4

Table 5

Parameter	f(mm)	f1(mm)	f2(mm)	f3(mm)	f4(mm)
						Numerical value	2.20	25.73	3.67	8.01	11.53
Parameter	TTL(mm)	ImgH(mm)	HFOV(°)	Fno
						Numerical value	4.56	2.41	49.88	2.25

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 mirror Converging focal point after head deviates.Fig. 4 B show the astigmatism curve of the pick-up lens of embodiment 2, its represent meridianal image surface bending and Sagittal image surface is bent.Fig. 4 C show the distortion curve of the pick-up lens of embodiment 2, and it represents the distortion in the case of different visual angles Sizes values.Understand that the pick-up lens given by embodiment 2 can realize good image quality according to Fig. 4 A to Fig. 4 C.

Embodiment 3

The pick-up lens according to the embodiment of the present application 3 is described referring to Fig. 5 to Fig. 6 C.Fig. 5 is shown according to this Shen Please embodiment 3 pick-up lens structural representation.

As shown in figure 5, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11 Part.

3rd lens L3 has negative power, and its thing side S5 is concave surface, and image side surface S6 is convex surface, and the 3rd lens L3 Thing side S5 and image side surface S6 be aspherical.

Table 7 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the pick-up lens of embodiment 3 Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 8 is shown available for each aspherical mirror in embodiment 3 The high order term coefficient in face, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.Table 9 is shown Total effective focal length f of the pick-up lens of embodiment 3, the effective focal length f1 to f4 of each lens, the optics total length of pick-up lens The half ImgH of the effective pixel area diagonal line length of photo-sensitive cell, pick-up lens be most on TTL, pick-up lens imaging surface S11 Big angle of half field-of view HFOV and pick-up lens F-number Fno.

Table 7

Table 8

Parameter	f(mm)	f1(mm)	f2(mm)	f3(mm)	f4(mm)
						Numerical value	2.15	11.65	1.94	-8.12	13.67
Parameter	TTL(mm)	ImgH(mm)	HFOV(°)	Fno
						Numerical value	4.62	2.41	50.52	2.25

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 mirror Converging focal point after head deviates.Fig. 6 B show the astigmatism curve of the pick-up lens of embodiment 3, its represent meridianal image surface bending and Sagittal image surface is bent.Fig. 6 C show the distortion curve of the pick-up lens of embodiment 3, and it represents the distortion in the case of different visual angles Sizes values.Understand that the pick-up lens given by embodiment 3 can realize good image quality according to Fig. 6 A to Fig. 6 C.

Embodiment 4

The pick-up lens according to the embodiment of the present application 4 is described referring to Fig. 7 to Fig. 8 C.Fig. 7 is shown according to this Shen Please embodiment 4 pick-up lens structural representation.

As shown in fig. 7, pick-up lens sequentially includes the first lens L1, the second lens along optical axis from thing side into image side L2, the 3rd lens L3, the 4th lens L4 and imaging surface S11.Pick-up lens may also include the photosensitive member for being arranged at imaging surface S11 Part.

4th lens L4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface, and the 4th lens L4 Thing side S7 and image side surface S8 be aspherical.

Table 10 shows surface type, radius of curvature, thickness, material and the circle of each lens of the pick-up lens of embodiment 4 Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).Table 11 is shown available for each aspheric in embodiment 4 The high order term coefficient of face minute surface, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.Table 12 shows The optics overall length of total effective focal length f of the pick-up lens of embodiment 4, the effective focal length f1 to f4 of each lens, pick-up lens is gone out Spend TTL, the half ImgH of the effective pixel area diagonal line length of photo-sensitive cell on pick-up lens imaging surface S11, pick-up lens Maximum angle of half field-of view HFOV and pick-up lens F-number Fno.

Table 10

Table 11

Parameter	f(mm)	f1(mm)	f2(mm)	f3(mm)	f4(mm)
						Numerical value	2.20	14.72	2.60	4.29	-5.16
Parameter	TTL(mm)	ImgH(mm)	HFOV(°)	Fno
						Numerical value	5.01	2.41	49.96	2.25

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 mirror Converging focal point after head deviates.Fig. 8 B show the astigmatism curve of the pick-up lens of embodiment 4, its represent meridianal image surface bending and Sagittal image surface is bent.Fig. 8 C show the distortion curve of the pick-up lens of embodiment 4, and it represents the distortion in the case of different visual angles Sizes values.Understand that the pick-up lens given by embodiment 4 can realize good image quality according to Fig. 8 A to Fig. 8 C.

To sum up, embodiment 1 to embodiment 4 meets the relation shown in table 13 below respectively.

Conditional embodiment	1	2	3	4
					ImgH/f	1.13	1.10	1.12	1.10
f1/f2	5.97	7.00	6.01	5.66
					R5/R6	0.76	1.00	0.72	1.14
CT2/TTL	0.15	0.18	0.21	0.14
					(T12*10)/TTL	1.10	0.81	1.37	1.49
ET4/CT4	1.09	1.08	1.09	1.36
					DT12/DT22	0.99	0.78	1.24	1.27
DT11/DT32	1.00	1.02	1.20	1.11
					SAG42/CT4	0.58	0.32	0.29	0.38

Table 13

The application also provides a kind of camera device, and its electronics photo-sensitive cell can be photosensitive coupling element (CCD) or complementation Property matal-oxide semiconductor element (CMOS).Camera device can be such as digital camera independent picture pick-up device or The photographing module being integrated on the mobile electronic devices such as mobile phone.The camera device is equipped with pick-up lens described above.

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 that the particular combination of above-mentioned technical characteristic forms Scheme, while should also cover in the case where not departing from the inventive concept, carried out by above-mentioned technical characteristic or its equivalent feature The other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein The technical scheme that the technical characteristic of energy is replaced mutually and formed.

Claims

1. pick-up lens, sequentially included by thing side to image side along optical axis：The first lens, the second lens with focal power, the 3rd Lens and the 4th lens, it is characterised in that

At least one in first lens and second lens has positive light coke；

The thing side of 3rd lens and the image side surface of the 4th lens are concave surface；And

The half ImgH of effective pixel area diagonal line length and the pick-up lens always has on the imaging surface of the pick-up lens Effect focal length f meets ImgH/f ＞ 1.

2. pick-up lens according to claim 1, it is characterised in that first lens and second lens are respectively provided with Positive light coke；

The effective focal length f1 of first lens and second lens effective focal length f2 meet 3 ＜ f1/f2≤7.

3. pick-up lens according to claim 2, it is characterised in that the radius of curvature R 5 of the 3rd lens thing side with The radius of curvature R 6 of the 3rd lens image side surface meets 0.7 ＜ R5/R6 ＜ 1.2.

4. pick-up lens according to claim 2, it is characterised in that the pick-up lens also includes being arranged at described first Diaphragm between lens and second lens.

5. pick-up lens according to claim 4, it is characterised in that the thing side of first lens is convex surface, described The image side surface of second lens is convex surface.

6. pick-up lens according to claim 2, it is characterised in that second lens are thick in the center on the optical axis Spending distance TTLs of the CT2 with the center of the thing side of first lens to the pick-up lens imaging surface on the optical axis expires 0.1 ＜ CT2/TTL ＜ 0.22 of foot.

7. pick-up lens according to claim 5, it is characterised in that first lens and second lens are described The center of the thing side of spacing distance T12 and first lens on optical axis is to the pick-up lens imaging surface in the optical axis On distance TTL meet 0.8 ＜ (T12*10)/TTL ＜ 1.5.

8. pick-up lens according to claim 2, it is characterised in that the edge thickness ET4 of the 4th lens with it is described 4th lens meet 1 ＜ ET4/CT4 ＜ 1.5 in the center thickness CT4 on the optical axis.

9. pick-up lens according to claim 5, it is characterised in that the effective radius DT12 of the first lens image side surface Meet 0.7 ＜ DT12/DT22 ＜ 1.3 with the effective radius DT22 of the second lens image side surface.

10. pick-up lens according to claim 5, it is characterised in that the effective radius of the first lens thing side DT11 and the 3rd lens image side surface effective radius DT32 meet 0.9 ＜ DT11/DT32 ＜ 1.3.

11. pick-up lens according to claim 2, it is characterised in that the 4th lens image side surface and the optical axis Intersection point to distance SAG42 of the effective radius summit of the 4th lens image side surface on the optical axis and the 4th lens in Center thickness CT4 on the optical axis meets 0.2 ＜ SAG42/CT4 ＜ 0.6.

12. the pick-up lens according to any one of claim 1 to 11, it is characterised in that the pick-up lens also includes The bandpass filter being arranged between the 4th lens and the pick-up lens imaging surface, the band logical ripple of the bandpass filter Long scope is 400nm to 800nm.

13. pick-up lens, sequentially included by thing side to image side along optical axis：First lens, the second lens, the 3rd lens and the 4th Lens, it is characterised in that

First lens and second lens are respectively provided with positive light coke；

3rd lens have positive light coke or negative power, and its thing side is concave surface；

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

The edge thickness ET4 of 4th lens meets 1 ＜ with the 4th lens in the center thickness CT4 on the optical axis ET4/CT4 ＜ 1.5.

14. pick-up lens according to claim 13, it is characterised in that the thing side of first lens is convex surface, institute The image side surface for stating the second lens is convex surface,

The pick-up lens also includes the diaphragm being arranged between first lens and second lens.

15. pick-up lens according to claim 14, it is characterised in that the effective focal length f1 of first lens with it is described The effective focal length f2 of second lens meets 3 ＜ f1/f2≤7.

16. pick-up lens according to claim 13, it is characterised in that the radius of curvature R 5 of the 3rd lens thing side Meet 0.7 ＜ R5/R6 ＜ 1.2 with the radius of curvature R 6 of the 3rd lens image side surface.

17. pick-up lens according to claim 13, it is characterised in that second lens are in the center on the optical axis Distance TTL of the center of the thing side of thickness CT2 and first lens to the pick-up lens imaging surface on the optical axis Meet 0.1 ＜ CT2/TTL ＜ 0.22.

18. pick-up lens according to claim 14, it is characterised in that the pick-up lens also includes being arranged at described the Bandpass filter between four lens and the pick-up lens imaging surface.

19. pick-up lens according to claim 18, it is characterised in that the band-pass wavelength scope of the bandpass filter is 400nm to 800nm.

20. according to the pick-up lens any one of claim 13,14 or 18, it is characterised in that the pick-up lens The half ImgH of effective pixel area diagonal line length and the pick-up lens total effective focal length f meet ImgH/f ＞ on imaging surface 1。

21. according to the pick-up lens any one of claim 13,14 or 18, it is characterised in that first lens and The center of the thing side of spacing distance T12 of second lens on the optical axis and first lens is to the camera lens Distance TTL of the head imaging surface on the optical axis meets 0.8 ＜ (T12*10)/TTL ＜ 1.5.

22. pick-up lens according to claim 21, it is characterised in that the effective radius of the first lens image side surface DT12 and the second lens image side surface effective radius DT22 meet 0.7 ＜ DT12/DT22 ＜ 1.3.

23. pick-up lens according to claim 21, it is characterised in that the effective radius of the first lens thing side DT11 and the 3rd lens image side surface effective radius DT32 meet 0.9 ＜ DT11/DT32 ＜ 1.3.

24. pick-up lens according to claim 21, it is characterised in that the 4th lens image side surface and the optical axis Intersection point to distance SAG42 of the effective radius summit of the 4th lens image side surface on the optical axis and the 4th lens in Center thickness CT4 on the optical axis meets 0.2 ＜ SAG42/CT4 ＜ 0.6.