CN109782419A - A kind of wide-angle high-res camera lens - Google Patents
A kind of wide-angle high-res camera lens Download PDFInfo
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- CN109782419A CN109782419A CN201910229764.0A CN201910229764A CN109782419A CN 109782419 A CN109782419 A CN 109782419A CN 201910229764 A CN201910229764 A CN 201910229764A CN 109782419 A CN109782419 A CN 109782419A
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Abstract
The present invention relates to a kind of wide-angle high-res camera lenses, be characterized in that, sequentially include by object side to image side along optical axis: object side is concave surface and the first lens P1 with negative refractive power, object side are convex surface and the second lens P2 with positive refracting power, object, are convex surface as bilateral and the third lens P3, image side surface with positive refracting power are convex surface and the 4th lens P4 with negative refractive power, paraxial object side are convex surface and the 5th lens P5 with positive refracting power；Diaphragm is equipped between the second lens P2 and the third lens P3, at least one face of the image two sides of 4th lens P4 is aspherical, at least one face of the image two sides of 5th lens P5 be it is aspherical, described first, second, third, fourth, the 5th lens P1, P2, P3, P4, P5 be aspherical glass lens.By using the optical system that the aspherical glass lens of five chips are constituted, the characteristics of realizing high-res, big field angle.
Description
Technical field
The present invention relates to optical system, especially a kind of wide-angle high-res camera lens is suitable for comprehensive screen, Liu Haiping, double
The high-pixel mobile phones postposition camera lens such as face.
Background technique
With constantly bringing forth new ideas for taking photograph of intelligent mobile phone function and screening-mode, people are to mobile phone rear camera shooting function
Demand not only be confined to high parsing power, large aperture, but towards more novel direction-wide-angle side development.
The development trend increasingly changed with electronic market, in addition to being mentioned to the features such as high parsing power, large aperture and ultrathin type
Out very except high request, big field angle is equally the developing direction to merit attention.The visual field of mainstream camera lens currently on the market
Angle, for the functional need for meeting electronic market, is meeting high parsing power, large aperture and ultrathin type etc. generally between 70 °~80 °
On basis, urgent need designs the mobile lens with big field angle.
Summary of the invention
The purpose of the invention is to provide a kind of wide-angle high-res camera lens for meeting the current market demand, using five
The characteristics of optical system that the aspherical glass lens of formula are constituted, realization high-res, big field angle.
The technical scheme is that
A kind of wide-angle high-res camera lens, is characterized in that, sequentially include by object side to image side along optical axis: object side is
Concave surface and the first lens P1 with negative refractive power, object side are convex surface and the second lens P2 with positive refracting power, object, as double
Side be convex surface and the third lens P3 with positive refracting power, image side surface be convex surface and the 4th lens P4 with negative refractive power,
The paraxial place in object side is convex surface and the 5th lens P5 with positive refracting power；It is set between the second lens P2 and the third lens P3
There is diaphragm, at least one face of the image two sides of the 4th lens P4 is aspherical, the image two sides at least one of the 5th lens P5
A face be it is aspherical, described first, second, third, fourth, the 5th lens P1, P2, P3, P4, P5 be aspherical plastic lens
Piece, wherein the refractive index N of the second lens P2 material2With the refractive index N of the 4th lens P4 material4It is all larger than 1.66.
A kind of above-mentioned wide-angle high-res camera lens, also meets following conditional:
TTL/ImgH<1.85
-0.2<R1/R2<-0.05
0.35<CT1/CT2<0.55
Wherein, TTL is the optics overall length of the wide-angle high-res camera lens, and ImgH is the wide-angle high-res camera lens
The half of effective pixel area diagonal line length on imaging surface, R1, R2 are respectively the object side of the first lens P1 and the song of image side surface
Rate radius, CT1 are air spacing of the second lens P2 and the third lens P3 on optical axis, and the center that CT2 is the third lens P3 is thick
Degree.This condition is used to limit overall length, the shape and focal power of the first and third lens of optical system, facilitates control system aberration,
And make the first lens easy to process, promote image quality.
A kind of above-mentioned wide-angle high-res camera lens, also meets following conditional:
Efl/Yh<0.9
Wherein, Efl be the wide-angle high-res camera lens effective focal length, Yh be the wide-angle high-res camera lens most
Big image height.This condition is used to limit camera lens focal power, facilitates control system aberration, easy to process.
A kind of above-mentioned wide-angle high-res camera lens, also satisfies the following conditional expression:
0.4<R3/R4<0.75
0.2<R5/R6<0.45
Wherein, R3, R4 are respectively the object side of the second lens P2 and the radius of curvature of image side surface, and R5, R6 are respectively the 5th
The object side of lens P5 and the radius of curvature of image side surface.This condition is used to limit the shape and light focus of the second lens, the 5th lens
Degree, facilitates control system aberration, and make the first lens easy to process, promotes image quality.
A kind of above-mentioned wide-angle high-res camera lens, also satisfies the following conditional expression:
0.05<CT3/CT4<0.15
Wherein, CT3 is air spacing of the 4th lens P4 to the 5th lens P5 on optical axis, and CT4 is the 5th lens P5's
Center thickness.This condition is used to limit the relationship in gap between the thickness and the 4th lens and the 5th lens of the 5th lens, easily
In processing and assembling, image quality is promoted.
A kind of above-mentioned wide-angle high-res camera lens, also satisfies the following conditional expression:
0.55<ET1/ET2<0.7
0.62<ET3/ET4<0.75
Wherein, ET1 is the edge thickness of the third lens P3, and ET2 is the edge air of the third lens P3 to the 4th lens P4
Interval, ET3 are the edge thickness of the 4th lens P4, and ET4 is the 4th lens P4 to the edge airspace of the 5th lens P5.This
Part is used to limit edge voids between the edge thickness and the third lens and the 4th lens of the third lens, the edge of the 4th lens
Edge voids between thickness and the 4th lens and the 5th lens, so that third and fourth lens is easy to process and assembling, promotion are imaged
Quality.
A kind of above-mentioned wide-angle high-res camera lens, also satisfies the following conditional expression:
|SAG41/SD41|≧0.5
Wherein, SAG41 is the rise of the 4th lens P4 object side, and SD41 is the maximum effectively half of the 4th lens P4 object side
Diameter.This condition is used to limit the shape and pore size of the 4th lens, so that the 4th lens more minimize.
A kind of above-mentioned wide-angle high-res camera lens, also satisfies the following conditional expression:
-1.15<f1/f<-0.93
1.55<f2/f<1.7
1.8<f4/f<1.95
Wherein, the focal length of the first lens P1 is f1, and the focal length of the second lens P2 is f2, and the focal length of the 4th lens P4 is f4,
The focal length of the wide-angle high-res camera lens is f.Meeting this formula can be with the first lens of reasonable distribution, the second lens and the 4 thoroughly
The shape and focal power of mirror facilitate control system aberration, easy to process, promote image quality.
A kind of above-mentioned wide-angle high-res camera lens, also satisfies the following conditional expression:
FBL/TTL<0.25
Wherein, FBL is the rear coke of the wide-angle high-res camera lens, and TTL is the optics of the wide-angle high-res camera lens
Overall length.This condition length burnt after being used to limit accounts for the length of entire optical system.
A kind of above-mentioned wide-angle high-res camera lens, the first, second, third, fourth, the 5th lens P1, P2, P3, P4, P5
Even aspheric surface glass lens are all made of, asphericity coefficient meets following equation:
Z=cy2/ [1+ { 1- (1+k) c2y2}+1/2]+A4y4+A6y6+A8y8+A10y10+A12y12+A14y14
Wherein, Z is aspherical rise, and c is aspherical paraxial curvature, and y is camera lens aperture, and k is circular cone coefficient, A4It is 4 times
Asphericity coefficient, A6For 6 asphericity coefficients, A8For 8 asphericity coefficients, A10For 10 asphericity coefficients, A12It is non-for 12 times
Asphere coefficient, A14For 14 asphericity coefficients.
The beneficial effects of the present invention are:
By using the optical system that the aspherical glass lens of above-mentioned 5 chip are constituted, realize that optics overall length is less than 4.1mm,
F-number is the bright camera lens of F2.2, has good performance for imaging also under darker environment, maximum as circle is
When matching " 4H7 " Sensor Pixel Dimensions are 1.12um, pixel is up to 8,000,000.
Detailed description of the invention
Fig. 1 is the X-Y scheme of camera lens in embodiment 1；
Fig. 2 is the index path of camera lens in embodiment 1；
Fig. 3 is the chromaticity difference diagram of camera lens in embodiment 1；
Fig. 4 is the astigmatism curvature of field indicatrix of camera lens in embodiment 1；
Fig. 5 is the optical distortion curve of camera lens in embodiment 1；
Fig. 6 is the index path of camera lens in embodiment 2；
Fig. 7 is the chromaticity difference diagram of camera lens in embodiment 2；
Fig. 8 is the astigmatism curvature of field indicatrix of camera lens in embodiment 2；
Fig. 9 is the optical distortion curve of camera lens in embodiment 2.
Specific embodiment
Embodiment 1
As shown in Figure 1 and Figure 2, the wide-angle high-res camera lens sequentially includes by object side to image side along optical axis: object, as two sides
Face is concave surface and the first lens P1 with negative refractive power；Object side is convex surface, image side surface is concave surface and has positive refracting power
The second lens P2；Object is convex surface and the third lens P3 with positive refracting power as bilateral；Object side is concave surface, image side surface
For convex surface and with the 4th lens P4 of negative refractive power；The paraxial place in object side is that convex surface, the paraxial place of image side surface are concave surface and have
5th lens P5 of positive refracting power.Diaphragm is equipped between the second lens P2 and the third lens P3.In the present embodiment, the 4th thoroughly
The image two sides of mirror P4 be it is aspherical, the image two sides of the 5th lens P5 are aspherical.
The wide-angle high-res camera lens, also meets following conditional:
TTL/ImgH<1.85
-0.2<R1/R2<-0.05
0.35<CT1/CT2<0.55
Efl/Yh<0.9
0.4<R3/R4<0.75
0.2<R5/R6<0.45
0.05<CT3/CT4<0.15
0.55<ET1/ET2<0.7
0.62<ET3/ET4<0.75
|SAG41/SD41|≧0.5
-1.15<f1/f<-0.93
1.55<f2/f<1.7
1.8<f4/f<1.95
FBL/TTL<0.25
Wherein, TTL is the optics overall length of the wide-angle high-res camera lens, and ImgH is the wide-angle high-res camera lens
The half of effective pixel area diagonal line length on imaging surface, R1, R2 are respectively the object side of the first lens P1 and the song of image side surface
Rate radius, CT1 are air spacing of the second lens P2 and the third lens P3 on optical axis, and the center that CT2 is the third lens P3 is thick
Degree；Efl is the effective focal length of the wide-angle high-res camera lens, and Yh is the maximum image height of the wide-angle high-res camera lens；R3,
R4 is respectively the object side of the second lens P2 and the radius of curvature of image side surface, R5, R6 be respectively the 5th lens P5 object side with
The radius of curvature of image side surface；CT3 is air spacing of the 4th lens P4 to the 5th lens P5 on optical axis, and CT4 is the 5th lens
The center thickness of P5；ET1 is the edge thickness of the third lens P3, and ET2 is the edge air of the third lens P3 to the 4th lens P4
Interval, ET3 are the edge thickness of the 4th lens P4, and ET4 is the 4th lens P4 to the edge airspace of the 5th lens P5；
SAG41 is the rise of the 4th lens P4 object side, and SD41 is the maximum effective radius of the 4th lens P4 object side；First lens P1
Focal length be f1, the focal length of the second lens P2 is f2, and the focal length of the 4th lens P4 is f4, the coke of the wide-angle high-res camera lens
Away from for f；FBL is the rear coke of the wide-angle high-res camera lens, and TTL is the optics overall length of the wide-angle high-res camera lens.
The wide-angle high-res camera lens, the first, second, third, fourth, the 5th lens P1, P2, P3, P4, P5 are all made of idol
Secondary aspherical glass lens, asphericity coefficient meet following equation:
Z=cy2/ [1+ { 1- (1+k) c2y2}+1/2]+A4y4+A6y6+A8y8+A10y10+A12y12+A14y14
Wherein, Z is aspherical rise, and c is aspherical paraxial curvature, and y is camera lens aperture, and k is circular cone coefficient, A4It is 4 times
Asphericity coefficient, A6For 6 asphericity coefficients, A8For 8 asphericity coefficients, A10For 10 asphericity coefficients, A12It is non-for 12 times
Asphere coefficient, A14For 14 asphericity coefficients.
In the present embodiment, the design parameter of camera lens please refers to table 1 (a) and table 1 (b)
Table 1 (a)
Table 1 (b)
In the present embodiment, optics overall length TTL is 4.1mm, and the value of TTL/ImgH is 1.78；The value of R1/R2 is -0.08；
The value that CT1 is 0.2015, CT1/CT2 is 0.375；
The value that the value of Efl is 1.944, Efl/Yh is 0.81；
The value of R3/R4 is 0.45；The value of R5/R6 is 0.224；
The value that CT3 is 0.0859, CT3/CT4 is 0.1；
The value that the value of ET1 is 0.35, ET1/ET2 is 0.67；
The value that the value of SAG41 is 0.388, SAG41/SD41 is 0.52；
The value that the value of f is 1.68, the value of f1/f is -1.07, f2/f is 1.6, f4/f value is 1.854；
The value of FBL/TTL is 0.185.
The present embodiment realizes the optics that full filed angle is 120 °, aperture FNO. value is 2.2, image height and TTL ratio are 0.56
System.
As shown in Figure 1 and Figure 2, the lens shape rotational symmetry of the wide-angle lens, convenient for molding production and processing.And eyeglass
Spacing is reasonable, designs convenient for the structure in later period.
As shown in figure 3, be the chromaticity difference diagram of wide-angle lens in the present embodiment, system can reflect to the correction situation of color difference,
Its curve leans on paracentral Y-axis, it was demonstrated that the color difference of system is small, the good resolution of imaging.
As shown in figure 4, being the astigmatism curvature of field indicatrix of wide-angle lens in the present embodiment, fine, the imaging of curvature of field correction
Edge blurry phenomenon is not presented.
As shown in figure 5, being the optical distortion curve of wide-angle lens in the present embodiment, curve illustrates to distort small close to Y-axis,
What is be imaged is high-quality.
Embodiment 2
In the present embodiment, with embodiment 1, specific design parameter please refers to table 2 (a) and table for the structure composition of camera lens and setting
2(b)。
Table 2 (a)
Table 2 (b)
In the present embodiment, optics overall length TTL is 4.1mm, and the value of TTL/ImgH is 1.78；The value of R1/R2 is -0.16；
The value that CT1 is 0.2417, CT1/CT2 is 0.47；
The value that the value of Efl is 2.04, Efl/Yh is 0.85；
The value of R3/R4 is 0.704；The value of R5/R6 is 0.43；
The value that CT3 is 0.0659, CT3/CT4 is 0.08；
The value that the value of ET1 is 0.38, ET1/ET2 is 0.58；
The value that the value of SAG41 is 0.4, SAG41/SD41 is 0.505；
The value that the value of f is 1.75, the value of f1/f is -1.05, f2/f is 1.625, f4/f value is 1.923；
The value of FBL/TTL is 0.165.
The present embodiment realizes the optics that full filed angle is 120 °, aperture FNO. value is 2.2, image height and TTL ratio are 0.56
System.
As shown in fig. 6, the lens shape rotational symmetry of the wide-angle lens, convenient for molding production and processing.And eyeglass spacing
Rationally, it is designed convenient for the structure in later period.
As shown in fig. 7, be the chromaticity difference diagram of wide-angle lens in the present embodiment, system can reflect to the correction situation of color difference,
Its curve leans on paracentral Y-axis, it was demonstrated that the color difference of system is small, the good resolution of imaging.
As shown in figure 8, being the astigmatism curvature of field indicatrix of wide-angle lens in the present embodiment, fine, the imaging of curvature of field correction
Edge blurry phenomenon is not presented.
As shown in figure 9, being the optical distortion curve of wide-angle lens in the present embodiment, curve illustrates to distort small close to Y-axis,
What is be imaged is high-quality.
Claims (10)
1. a kind of wide-angle high-res camera lens, which is characterized in that sequentially include by object side to image side along optical axis: object side is concave surface
And the first lens P1 with negative refractive power, object side are convex surface and the second lens P2 with positive refracting power, object, as bilateral is equal
For convex surface and the third lens P3, image side surface with positive refracting power are convex surface and the 4th lens P4 with negative refractive power, object side
The paraxial place in face is convex surface and the 5th lens P5 with positive refracting power；Light is equipped between the second lens P2 and the third lens P3
Door screen, at least one face of the image two sides of the 4th lens P4 are aspherical, at least one face of the image two sides of the 5th lens P5
To be aspherical, described first, second, third, fourth, the 5th lens P1, P2, P3, P4, P5 be aspherical glass lens,
In the second lens P2 material refractive index N2With the refractive index N of the 4th lens P4 material4It is all larger than 1.66.
2. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also meet following conditional:
TTL/ImgH<1.85
-0.2<R1/R2<-0.05
0.35<CT1/CT2<0.55
Wherein, TTL is the optics overall length of the wide-angle high-res camera lens, and ImgH is the imaging of the wide-angle high-res camera lens
The half of effective pixel area diagonal line length on face, R1, R2 are respectively the object side of the first lens P1 and the curvature half of image side surface
Diameter, CT1 are air spacing of the second lens P2 and the third lens P3 on optical axis, and CT2 is the center thickness of the third lens P3.
3. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also meet following conditional:
Efl/Yh<0.9
Wherein, Efl is the effective focal length of the wide-angle high-res camera lens, and Yh is the maximum picture of the wide-angle high-res camera lens
It is high.
4. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also satisfy the following conditional expression:
0.4<R3/R4<0.75
0.2<R5/R6<0.45
Wherein, R3, R4 are respectively the object side of the second lens P2 and the radius of curvature of image side surface, and R5, R6 are respectively the 5th lens
The object side of P5 and the radius of curvature of image side surface.
5. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also satisfy the following conditional expression:
0.05<CT3/CT4<0.15
Wherein, CT3 is air spacing of the 4th lens P4 to the 5th lens P5 on optical axis, and CT4 is the center of the 5th lens P5
Thickness.
6. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also satisfy the following conditional expression:
0.55<ET1/ET2<0.7
0.62<ET3/ET4<0.75
Wherein, ET1 is the edge thickness of the third lens P3, and ET2 is the third lens P3 to the edge airspace of the 4th lens P4,
ET3 is the edge thickness of the 4th lens P4, and ET4 is the 4th lens P4 to the edge airspace of the 5th lens P5.
7. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also satisfy the following conditional expression:
|SAG41/SD41|≧0.5
Wherein, SAG41 is the rise of the 4th lens P4 object side, and SD41 is the maximum effective radius of the 4th lens P4 object side.
8. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also satisfy the following conditional expression:
-1.15<f1/f<-0.93
1.55<f2/f<1.7
1.8<f4/f<1.95
Wherein, the focal length of the first lens P1 is f1, and the focal length of the second lens P2 is f2, and the focal length of the 4th lens P4 is f4, described
The focal length of wide-angle high-res camera lens is f.
9. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that also satisfy the following conditional expression:
FBL/TTL<0.25
Wherein, FBL is the rear coke of the wide-angle high-res camera lens, and TTL is the optics overall length of the wide-angle high-res camera lens.
10. a kind of wide-angle high-res camera lens according to claim 1, which is characterized in that first, second, third,
Four, the 5th lens P1, P2, P3, P4, P5 is all made of even aspheric surface glass lens, and asphericity coefficient meets following equation:
Z=cy2/ [1+ { 1- (1+k) c2y2}+1/2]+A4y4+A6y6+A8y8+A10y10+A12y12+A14y14
Wherein, Z is aspherical rise, and c is aspherical paraxial curvature, and y is camera lens aperture, and k is circular cone coefficient, A4It is aspherical for 4 times
Coefficient, A6For 6 asphericity coefficients, A8For 8 asphericity coefficients, A10For 10 asphericity coefficients, A12For 12 aspherical systems
Number, A14For 14 asphericity coefficients.
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| CN201910229764.0A CN109782419A (en) | 2019-03-26 | 2019-03-26 | A kind of wide-angle high-res camera lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025605A (en) * | 2019-12-25 | 2020-04-17 | 辽宁中蓝光电科技有限公司 | Free-form surface wide-angle camera lens |
| CN113721345A (en) * | 2021-08-11 | 2021-11-30 | 江西晶超光学有限公司 | Optical system, lens module and electronic equipment |
| US12000991B2 (en) | 2021-02-26 | 2024-06-04 | Largan Precision Co., Ltd. | Optical image capturing lens assembly, imaging apparatus and electronic device |
-
2019
- 2019-03-26 CN CN201910229764.0A patent/CN109782419A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025605A (en) * | 2019-12-25 | 2020-04-17 | 辽宁中蓝光电科技有限公司 | Free-form surface wide-angle camera lens |
| CN111025605B (en) * | 2019-12-25 | 2021-09-28 | 辽宁中蓝光电科技有限公司 | Free-form surface wide-angle camera lens |
| US12000991B2 (en) | 2021-02-26 | 2024-06-04 | Largan Precision Co., Ltd. | Optical image capturing lens assembly, imaging apparatus and electronic device |
| CN113721345A (en) * | 2021-08-11 | 2021-11-30 | 江西晶超光学有限公司 | Optical system, lens module and electronic equipment |
| CN113721345B (en) * | 2021-08-11 | 2022-08-19 | 江西晶超光学有限公司 | Optical system, lens module and electronic equipment |
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