CN105929523B - A kind of ultra-thin wide-angle high pixel lens module - Google Patents

A kind of ultra-thin wide-angle high pixel lens module Download PDF

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Publication number
CN105929523B
CN105929523B CN201610404514.2A CN201610404514A CN105929523B CN 105929523 B CN105929523 B CN 105929523B CN 201610404514 A CN201610404514 A CN 201610404514A CN 105929523 B CN105929523 B CN 105929523B
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lens
curvature
radius
image side
object side
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CN105929523A (en
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林肖怡
袁正超
陈龙泉
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Guangdong Xu Ye Optoelectronics Technology Inc Co
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Guangdong Xu Ye Optoelectronics Technology Inc Co
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/004Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/06Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/18Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The invention discloses a kind of ultra-thin wide-angle high pixel lens modules.The lens module along its optical axis from the object side to image side direction successively include: a positive light coke the first lens;One negative power and the second lens for bending towards image side side;The third lens of one positive light coke;The 4th lens and an imaging surface of one negative power;One optical filter;One diaphragm;Above-mentioned lens assembly meets the following conditions: (1)(2)1.3<TTL/F<1.4;The present invention can be applied the 1/4 of 4P " in the ultra-thin aspherical mobile lens of wide-angle high pixel; also have the quality of higher imaging while meeting and minimizing big wide-angle; this lens group uses 4 lens; can effectively control length TTL≤3.4mm of camera lens by the collocation of each eyeglass; field angle FOV≤84 degree; F-number FNo=2.2, the design of large aperture, enough light passing amounts guarantee high brightness, improve the shooting quality under low light environment, have difficulty of processing small for relatively other optical lens, weight is light, the low advantage of manufacturing cost.

Description

A kind of ultra-thin wide-angle high pixel lens module
Technical field:
The present invention relates to phtographic lens product technical field, in particular to a kind of ultra-thin wide-angle high pixel phtographic lens group Part.
Background technique:
With the development of science and technology, all kinds of digital product functions is increasing, such as many digital products (such as various shiftings Dynamic terminal, mobile phone) in be all integrated with lens module.But with the continuous renewal of product, consumer is for digital product The requirement of middle photograph image quality also grows with each passing hour.In order to improve the high pixel demand of mobile phone camera, the mobile phone in existing market is Through using the pick-up lens group of four-piece type, although this camera lens helps to improve the shooting pixel of photography, but carried out Further miniaturized design, in order to the electronic products such as digital product micromation, miniaturization is adapted is current camera lens factory Quotient's problem to be solved.
Summary of the invention:
Technical problem to be solved by the present invention lies in overcome the deficiencies of the prior art and provide a kind of ultra-thin wide-angle high pixel Lens module.
In order to solve the above-mentioned technical problem, present invention employs following technical proposals: the ultra-thin wide-angle high pixel photographic mirror Head assembly, the lens module along its optical axis from the object side to image side direction successively include: a positive light coke the first lens, It has one towards the convex surface of object side and one towards the convex surface of image side;One negative power and bend towards image side side second thoroughly Mirror has the concave surface towards image side;The third lens of one positive light coke have the concave surface towards object side and direction The convex surface of image side;4th lens of one negative power, object side have a convex surface for being located at optical axis near zone, and edge The convex surface extends outward to form concave surface, meanwhile, the image side surface of the 4th lens has the concave surface being located near optical axis;And one Imaging surface;One optical filter, the optical filter is between the 4th lens and the imaging surface;One diaphragm, the diaphragm Between object space and the first lens, also, above-mentioned lens assembly meets the following conditions: (1) 0.65 < (EPD/F) * tgFOV(2)1.3<TTL/F<1.4;In above-mentioned condition, relevant parameter indicates that content is as follows: EPD: being described The Entry pupil diameters of phtographic lens;FOV: for the field angle of the phtographic lens;TTL: for the optics overall length of the phtographic lens;F: The focal length of the phtographic lens.
Furthermore, in above-mentioned technical proposal, the lens assembly also meets the following conditions: (3) 0.8 < F/F1 < 1.5;(4)1.5<D34/F*100<2.5;(5)1.2<(R5+R6)/(R5-R6)<2.5;(6) 5 < | R2/R1 | < 10,0.5 < R4/R3 <1;(7)0.8<F12/F<1.5;(8)5<T4/D34<10.
Furthermore, in above-mentioned technical proposal, the center thickness of first lens is 0.555~0.565mm, described The center thickness of second lens is 0.24~0.25mm, and the center thickness of the third lens is 0.585~0.6mm, described the The center thickness of four lens is 0.33~0.35mm.
Alternatively, the lens assembly meets the following conditions in above-mentioned technical proposal: (3) 0.8 < F/F1 < 1.5;(4)0.8 <|F3/F4|<1.2;(5)1.2<(R5+R6)/(R5-R6)<2.5;(6) 5 < | R2/R1 | < 10,0.5 < R4/R3 < 1;(7)0.3< F12/F34<0.8;(8)5<(T2+T4)/(D23+D34)<10.
Furthermore, in above-mentioned technical proposal, the center thickness of first lens is 0.530~0.555mm, described The center thickness of second lens is 0.245~0.26mm, and the center thickness of the third lens is 0.569~0.578mm, described The center thickness of 4th lens is 0.34~0.355mm.
Alternatively, the lens assembly meets the following conditions in above-mentioned technical proposal: (3) 1.5 < D34/F*100 < 2.5; (4)1.2<(R5+R6)/(R5-R6)<2.5;(5)5<|R2/R1|<100.5<R4/R3<0.8;(6)0.9<F12/F<1.2;(7)5 <T4/D34<10;(8)-0.3<F/R2<-0.2.
Furthermore, in above-mentioned technical proposal, the center thickness of first lens is 0.528~0.54mm, described The center thickness of second lens is 0.24~0.25mm, and the center thickness of the third lens is 0.57~0.58mm, described the The center thickness of four lens is 0.34~035mm.
Furthermore, in above-mentioned technical proposal, optics total length TTL≤3.4mm of the phtographic lens, photographic mirror Field angle FOV≤84 degree of head, the F-number FNo=2.2 of phtographic lens.
Furthermore, in above-mentioned technical proposal, the optical filter with a thickness of 0.21mm.
The present invention is directed to current high pixel shooting mobile phone and designs, and has the characteristics that big wide-angle large aperture.It is relatively current Similar product has the advantage that its whole volume (along optical axis direction) can further be compressed, not only can satisfy The demand of wide-angle lens is miniaturized, and can guarantee higher image quality.Present invention employs appropriate optical lens structures It is laid out with eyeglass so that light is gentler by lens, the amendment of aberration is more reasonable;The further modified off-axis visual field of energy Aberration;Image distortion is small, and clarity is high, can guarantee that shooting picture is clear while taking into account wide-angle and large aperture, color Color full, stereovision is abundant.
The present invention, which can be applied the 1/4 of 4P, " in the ultra-thin aspherical mobile lens of wide-angle high pixel, is meeting miniaturization Also there is the quality of higher imaging, this lens group uses 4 lens, can have by the collocation of each eyeglass while big wide-angle Length TTL≤3.4mm of the control camera lens of effect, field angle FOV≤84 degree, F-number FNo=2.2, the design of large aperture, enough Light passing amount guarantee high brightness, improve the shooting quality under low light environment, there is processing for relatively other optical lens Difficulty is small, and weight is light, the low advantage of manufacturing cost.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one;
Fig. 2 is the characteristics of four lens in the embodiment of the present invention one;
Fig. 3 is the curvature of field and distortion figure of the embodiment of the present invention one;
Fig. 4 is the spherical aberration figure of the embodiment of the present invention one;
Fig. 5 is the structural schematic diagram of the embodiment of the present invention two;
Fig. 6 is the characteristics of four lens in the embodiment of the present invention two;
Fig. 7 is the curvature of field and distortion figure of the embodiment of the present invention two;
Fig. 8 is the spherical aberration figure of the embodiment of the present invention two;
Fig. 9 is the structural schematic diagram of the embodiment of the present invention three;
Figure 10 is the characteristics of four lens in the embodiment of the present invention three;
Figure 11 is the curvature of field and distortion figure of the embodiment of the present invention three;
Figure 12 is the spherical aberration figure of the embodiment of the present invention three;
Specific embodiment:
Embodiment 1
The present invention is a kind of lens module in digital product.As shown in Fig. 1-Fig. 4, this is reality of the invention Apply example one.
As shown in Figure 1, along its optical axis, direction (from left to right) successively includes: light to the lens module from the object side to image side Late 5, first lens 1, the second lens 2, the third lens 3, the 4th lens 4, optical filter 6, imaging surface 7.
First lens 1 are the lens of a positive light coke, have one towards the convex surface of object side and a court To the convex surface of image side.
Described 2 one negative-power lenses of the second lens have the concave surface towards image side;
The third lens 3 are a positive light coke and the meniscus lens for bending towards object space, are had towards object side Concave surface and convex surface towards image side.
4th lens 4 are the lens of a negative power, are formed with convex surface 41 towards object side along optical axis position, And concave surface 42 is extended outward to form along the convex surface 41, meanwhile, the 4th lens 4 are formed with concave surface towards image side along optical axis position 43.That is, design has the point of inflexion, effectively convergence Off-axis-light on 4 object side surface of the 4th lens, it is incident upon on photosensitive element Angle and the preset angle of chip more coincide, and can further modified off-axis visual field aberration.
In the present invention, first lens 1, the second lens 2, the third lens 3, the object side surface of the 4th lens 4 and picture Side surface is aspherical, and resin material production can be used in four lens.
The optical filter 6 is between the 4th lens 4 and the imaging surface 7;The diaphragm 5 be located at object space 8 with Between first lens 2.
Above-mentioned lens assembly meets the following conditions:
(1)0.65<(EPD/F)*tgFOV
(2)1.3<TTL/F<1.4
(3)0.8<F/F1<1.5;
(4)1.5<D34/F*100<2.5;
(5)1.2<(R5+R6)/(R5-R6)<2.5;
(6) 5 < | R2/R1 | < 10,0.5 < R4/R3 < 1;
(7)0.8<F12/F<1.5;
(8)5<T4/D34<10;
In above-mentioned condition, relevant parameter indicates that content is as follows:
EPD: for the Entry pupil diameters of the phtographic lens;
FOV: for the field angle of the phtographic lens;
TTL: for the optics overall length of the phtographic lens;
F: the focal length of the phtographic lens.
F1: the focal length of first lens;
F12: the combined focal length of first lens and the second lens;
D34: the third lens and the 4th lens are in the spacing distance on optical axis;
Thickness of T4: the four lens on optical axis;
The radius of curvature of R1: the first lens object side surface;
The radius of curvature of R2: the first lens image side surface;
The radius of curvature of R3: the second lens object side surface;
The radius of curvature of R4: the second lens image side surface;
R5: the radius of curvature of the third lens object side surface;
R6: the radius of curvature on the third lens image side surface.
Shown in Figure 2, this is the characteristics of four lens in the embodiment of the present invention one, wherein the lens assembly Focal length F=2.56mm, F-number FNO=2.2, FOV=84 ° of field angle.
First lens, the second lens, the third lens, the 4th lens object side surface and the image side surface meets following public Formula:
The diaphragm 5 is set between object space 8 and the first lens 1, the glass filter 6 be located at the 4th lens 4 at Between image planes 7, with a thickness of 0.21mm, the center thickness of first lens 1 is 0.555~0.565mm, second lens 2 center thickness is 0.24~0.25mm, and the center thickness of the third lens 3 is 0.585~0.6mm, the 4th lens 4 Center thickness be 0.33~0.35mm.
Embodiment 2
As shown in figure 5-8, this is the embodiment of the present invention two, and structure is identical as above-described embodiment one, only thoroughly It is slightly adjusted in the parameter of mirror.The lens assembly of the present embodiment two meets the following conditions:
(1)0.65<(EPD/F)*tgFOV
(2)1.3<TTL/F<1.4
(3)0.8<F/F1<1.2;
(4)0.8<|F3/F4|<1.2
(5)1.2<(R5+R6)/(R5-R6)<2.5
(6)5<|R2/R1|<10 0.5<R4/R3<1
(7)0.3<F12/F34<0.8
(8)5<(T2+T4)/(D23+D34)<10
In above-mentioned condition, relevant parameter indicates that content is as follows:
EPD: for the Entry pupil diameters of the phtographic lens;
FOV: for the field angle of the phtographic lens;
TTL: for the optics overall length of the phtographic lens;
F: the focal length of the phtographic lens.
F1: the focal length of first lens;
F3: the focal length of the third lens;
F4: the focal length of the 4th lens;
F12: the combined focal length of first lens and the second lens;
F34: the combined focal length of first lens and the second lens;
D23: second lens and the third lens are in the spacing distance on optical axis;
D34: the third lens and the 4th lens are in the spacing distance on optical axis;
T2: second lens are in the thickness on optical axis;
T4: the 4th lens are in the thickness on optical axis;
The radius of curvature of R1: the first lens object side surface;
The radius of curvature of R2: the first lens image side surface;
The radius of curvature of R3: the second lens object side surface;
The radius of curvature of R4: the second lens image side surface;
R5: the radius of curvature of the third lens object side surface;
R6: the radius of curvature on the third lens image side surface.
Shown in Figure 6, this is the characteristics of four lens in the embodiment of the present invention two, wherein the lens assembly Focal length F=2.54mm, F-number FNO=2.2, FOV=84.5 ° of visual angle.
First lens, the second lens, the third lens, the object side surface of the 4th lens and the image side surface meets following Formula:
The diaphragm 5 is set between object space 8 and the first lens 1, the glass filter 7 be located at the 4th lens 4 at Between image planes 7, with a thickness of 0.21mm.The center thickness of first lens 1 is 0.530~0.555mm, second lens 2 center thickness is 0.245~0.26mm, and the center thickness of the third lens 3 is 0.569~0.578mm, and the described 4th thoroughly The center thickness of mirror 4 is 0.34~0.355mm.
Embodiment 3
As shown in Fig. 9-Figure 12, this is the embodiment of the present invention three, with above-mentioned two embodiment institute the difference is that four The lens assembly of the characteristics of piece lens, the present embodiment three meets the following conditions:
(1)0.65<(EPD/F)*tgFOV
(2)1.3<TTL/F<1.4
(3)1.5<D34/F*100<2.5
(4)1.2<(R5+R6)/(R5-R6)<2.5
(5)5<|R2/R1|<10 0.5<R4/R3<0.8
(6)0.9<F12/F<1.2
(7)5<T4/D34<10
(8)-0.3<F/R2<-0.2
In above-mentioned condition, relevant parameter indicates that content is as follows:
EPD: for the Entry pupil diameters of the phtographic lens;
FOV: for the field angle of the phtographic lens;
TTL: for the optics overall length of the phtographic lens;
F: the focal length of the phtographic lens.
D34: the third lens and the 4th lens are in the spacing distance on optical axis;
T4: the 4th lens are in the thickness on optical axis;
F12: the combined focal length of first lens and the second lens;
The radius of curvature of R1: the first lens object side surface;
The radius of curvature of R2: the first lens image side surface;
The radius of curvature of R3: the second lens object side surface;
The radius of curvature of R4: the second lens image side surface;
R5: the radius of curvature of the third lens object side surface;
R6: the radius of curvature on the third lens image side surface.
Wherein in the present embodiment lens assembly focal length F=2.54mm, F-number FNO=2.2, FOV=84.4 ° of visual angle.
First lens, the second lens, the third lens, the object side surface of the 4th lens and the image side surface meets following Formula:
And the diaphragm 5 is set between object space and the first lens 1, the glass filter is located at the along object space to image space Between four lens and the imaging surface of the system, with a thickness of 0.21mm, the center thickness of first lens is 0.528~ 0.54mm, the center thickness of second lens are 0.24~0.25mm, the center thickness of the third lens is 0.57~ 0.58mm, the center thickness of the 4th lens are 0.34~035mm.
In conclusion the present invention is directed to current high pixel shooting mobile phone and designs, has the characteristics that big wide-angle large aperture.Phase To current similar product, have the advantage that
1, the light-inletting quantity for increasing shooting process, ensure that the light levels of shooting picture, is greater than 84 degree of wide-angle designs, makes hand Machine has larger coverage;Less than 2%, the curvature of field is less than 0.1mm for the optical distortion of this optical lens assembly, and spherical aberration is less than 0.1mm, image distortion is small, and clarity is high.High pixel guarantees that shooting picture effect is clear, and color is full, and stereovision is abundant.
2, using the structure of four aspherical lens, save the cost while, can effectively correct field music, astigmatism, ratio chromatism, Etc. all kinds of aberrations.Replace glass using resins for universal use material on the market, moulding process maturation is more mature, solves glass lens Because the problem of product yield is low caused by processing difficulties and higher cost.
3, this optical lens assembly can get the correction of good aberration, color difference and distortion, and can get larger field Angle, while image distortion is small, clarity is high;
4, in eyeglass one, the tortuosity ratio that is negative is arranged in R2 value, greatly improves the imaging performance of 4P lens structure;
5, the Entry pupil diameters of system, focal length F, field angle FOV meet 0.65 < (EPD/F) * tgFOV The imaging angle of the image optics eyeglass group can be increased, and then can achieve wide-angle effect, and can moderately bear the imaging lens The refracting power of piece group reduces it and assembles susceptibility.
6, when the optics overall length TTL and focal length F of system meet 1.3 < TTL/F < 1.4, promote system towards the big image planes of miniaturization Development.
Certainly, the above is only a specific embodiment of the present invention, be not to limit the scope of the present invention, it is all according to The equivalent change or modification that structure, feature and principle described in scope of the present invention patent is done should be included in Shen of the present invention It please be in the scope of the patents.

Claims (7)

1. a kind of ultra-thin wide-angle high pixel lens module, it is characterised in that: the lens module is along its optical axis from object side Successively include: to image side direction
First lens of one positive light coke, have one towards the convex surface of object side and one towards the convex surface of image side;
One negative power and the second lens for bending towards image side side have the concave surface towards image side;
The third lens of one positive light coke have the concave surface towards object side, and the convex surface towards image side;
4th lens of one negative power, object side have a convex surface for being located at optical axis near zone, and along the convex surface Concave surface is extended outward to form, meanwhile, the image side surface of the 4th lens has the concave surface being located near optical axis;
An and imaging surface;
One optical filter, the optical filter is between the 4th lens and the imaging surface;
One diaphragm, the diaphragm between object space and the first lens,
Also, above-mentioned lens assembly meets the following conditions:
(1)
(2)1.3<TTL/F<1.4
In above-mentioned condition, relevant parameter indicates that content is as follows:
EPD: for the Entry pupil diameters of the phtographic lens;
FOV: for the field angle of the phtographic lens;
TTL: for the optics overall length of the phtographic lens;
F: the focal length of the phtographic lens;
Optics total length TTL≤3.4mm of the phtographic lens, field angle FOV≤84 degree of phtographic lens, phtographic lens F-number FNo=2.2.
2. a kind of ultra-thin wide-angle high pixel lens module according to claim 1, it is characterised in that: the camera lens Component also meets the following conditions:
(3)0.8<F/F1<1.5;
(4)1.5<D34/F*100<2.5;
(5)1.2<(R5+R6)/(R5-R6)<2.5;
(6) 5 < | R2/R1 | < 10,0.5 < R4/R3 < 1;
(7)0.8<F12/F<1.5;
(8)5<T4/D34<10;
In above-mentioned condition, relevant parameter indicates that content is as follows:
F1: the focal length of first lens;
F12: the combined focal length of first lens and the second lens;
D34: the third lens and the 4th lens are in the spacing distance on optical axis;
Thickness of T4: the four lens on optical axis;
The radius of curvature of R1: the first lens object side surface;
The radius of curvature of R2: the first lens image side surface;
The radius of curvature of R3: the second lens object side surface;
The radius of curvature of R4: the second lens image side surface;
R5: the radius of curvature of the third lens object side surface;
R6: the radius of curvature on the third lens image side surface.
3. a kind of ultra-thin wide-angle high pixel lens module according to claim 2, it is characterised in that: described first thoroughly The center thickness of mirror is 0.555~0.565mm, and the center thickness of second lens is 0.24~0.25mm, and the third is saturating The center thickness of mirror is 0.585~0.6mm, and the center thickness of the 4th lens is 0.33~0.35mm.
4. a kind of ultra-thin wide-angle high pixel lens module according to claim 1, it is characterised in that: the camera lens Component also meets the following conditions:
(3)0.8<F/F1<1.2
(4)0.8<|F3/F4|<1.2
(5)1.2<(R5+R6)/(R5-R6)<2.5
(6)5<|R2/R1|<10 0.5<R4/R3<1
(7)0.3<F12/F34<0.8
(8)5<(T2+T4)/(D23+D34)<10
In above-mentioned condition, relevant parameter indicates that content is as follows:
F1: the focal length of first lens;
F3: the focal length of the third lens;
F4: the focal length of the 4th lens;
F12: the combined focal length of first lens and the second lens;
F34: the combined focal length of the third lens and the 4th lens;
D23: second lens and the third lens are in the spacing distance on optical axis;
D34: the third lens and the 4th lens are in the spacing distance on optical axis;
T2: second lens are in the thickness on optical axis;
T4: the 4th lens are in the thickness on optical axis;
The radius of curvature of R1: the first lens object side surface;
The radius of curvature of R2: the first lens image side surface;
The radius of curvature of R3: the second lens object side surface;
The radius of curvature of R4: the second lens image side surface;
R5: the radius of curvature of the third lens object side surface;
R6: the radius of curvature on the third lens image side surface.
5. a kind of ultra-thin wide-angle high pixel lens module according to claim 4, it is characterised in that: described first thoroughly The center thickness of mirror is 0.530~0.555mm, and the center thickness of second lens is 0.245~0.26mm, and the third is saturating The center thickness of mirror is 0.569~0.578mm, and the center thickness of the 4th lens is 0.34~0.355mm.
6. a kind of ultra-thin wide-angle high pixel lens module according to claim 1, it is characterised in that: the camera lens Component also meets the following conditions:
(3)1.5<D34/F*100<2.5
(4)1.2<(R5+R6)/(R5-R6)<2.5
(5)5<|R2/R1|<10 0.5<R4/R3<0.8
(6)0.9<F12/F<1.2
(7)5<T4/D34<10
(8)-0.3<F/R2<-0.2
In above-mentioned condition, relevant parameter indicates that content is as follows:
D34: the third lens and the 4th lens are in the spacing distance on optical axis;
T4: the 4th lens are in the thickness on optical axis;
F12: the combined focal length of first lens and the second lens;
The radius of curvature of R1: the first lens object side surface;
The radius of curvature of R2: the first lens image side surface;
The radius of curvature of R3: the second lens object side surface;
The radius of curvature of R4: the second lens image side surface;
R5: the radius of curvature of the third lens object side surface;
R6: the radius of curvature on the third lens image side surface.
7. a kind of ultra-thin wide-angle high pixel lens module according to claim 6, it is characterised in that: described first thoroughly The center thickness of mirror is 0.528~0.54mm, and the center thickness of second lens is 0.24~0.25mm, the third lens Center thickness be 0.57~0.58mm, the center thickness of the 4th lens is 0.34~035mm.
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