CN108761740A - Ultra-wide angle optical camera lens group - Google Patents
Ultra-wide angle optical camera lens group Download PDFInfo
- Publication number
- CN108761740A CN108761740A CN201810922792.6A CN201810922792A CN108761740A CN 108761740 A CN108761740 A CN 108761740A CN 201810922792 A CN201810922792 A CN 201810922792A CN 108761740 A CN108761740 A CN 108761740A
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- lens
- image side
- refracting power
- ultra
- aspherical
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- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 230000000007 visual effect Effects 0.000 claims abstract description 13
- 238000003384 imaging method Methods 0.000 claims description 8
- 230000004075 alteration Effects 0.000 description 16
- 201000009310 astigmatism Diseases 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised 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 five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical 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 ultra-wide angle optical camera lens groups, include sequentially by object side to image side：First lens have negative refracting power；Second lens have positive refracting power；The third lens have positive refracting power, at the dipped beam axis of image side surface are convex surface；4th lens have negative refracting power, for concave surface, image side surface, place includes at least a convex surface off axis at the dipped beam axis of image side surface；5th lens, have positive refracting power, at the dipped beam axis of image side surface be concave surface, place includes at least a convex surface off axis on image side surface；Second and third lens, which is set as positive refracting power, can effectively inhibit overall length and have large viewing simultaneously, and ultra-wide angle visual angle can be realized under short overall length, to meet the demand of miniaturization and big visual angle.
Description
Technical field
The present invention relates to the small-sized image pickup of use for electronic products, taking lens fields, and in particular to a kind of ultra-wide angle optics is taken the photograph
As lens group.
Background technology
Camera lens is by lens（Convex lens, concavees lens）Composition, multiple lens eventually form camera lens by multiple combinations mode,
In it is relatively conventional with three-chip type, four-piece type, five chip camera lenses.Electronic product develops towards toward frivolous miniaturization in recent years, especially
It is the fashionable of handheld device, therefore the image-taking device arranged in pairs or groups also needs corresponding miniaturization, however existing optical lens be difficult to it is simultaneous
Have big visual angle and short overall length, therefore, it is difficult to be equipped on frivolous electronic device.
Invention content
The present invention overcomes existing defect to provide a kind of ultra-wide angle optical camera lens group, has both big visual angle and short overall length, fits
Preferably used on compact apparatus,
The invention is realized by the following technical scheme：
Ultra-wide angle optical camera lens group includes sequentially by object side to image side：
First lens have negative refracting power；Second lens have positive refracting power；The third lens have positive refracting power, image side table
It is convex surface at the dipped beam axis of face；4th lens have negative refracting power, locate off axis for concave surface, image side surface at the dipped beam axis of image side surface
Including at least a convex surface；5th lens, have positive refracting power, at the dipped beam axis of image side surface be concave surface, place is extremely off axis on image side surface
Include a convex surface less；
Wherein, first focal length of lens is f1, and second focal length of lens is f2, and the third lens focal length is f3, and the 4th focal length of lens is f4,
5th focal length of lens is f5, and the focal length value of entire lens set is f, meets following relationship：-1<|f1|/f2<3.0,-1<|f3
|/f<2。
Further, the half at maximum visual angle is HFOV, the axis of the first lens object side surface to imaging surface in lens group
On distance be TL, meet：TL/tan(HFOV)<1.5mm.
Further, the refractive index of first lens is N1, and the refractive index of the second lens is N2, the refractive index of the third lens
Refractive index for N3, the 4th lens is N4, and the refractive index of the 5th lens is N5, and wherein the maximum is in N1, N2, N3, N4 and N5
Nmax meets following condition：1.50<Nmax<1.70.
Further, the image side surface of the third lens is spherical surface or aspherical, object side is spherical surface or aspherical.
Further, the image side surface of the 4th lens and object side are aspherical.
Further, the image side surface of the 5th lens and be aspherical without side.
Compared to the prior art, the present invention has the following advantages：
The first lens of lens set of the present invention are negative refracting power, second and third lens, which is set as positive refracting power, effectively to inhibit total
It is long that simultaneously there is large viewing simultaneously, ultra-wide angle visual angle can be realized under short overall length, to meet the demand of miniaturization and big visual angle,
When satisfaction -1<|f1|/f2<3.0 and 1.50<Nmax<When 1.70, aberration can be allowed to obtain more best balance with astigmatism, additionally it is possible to
Make full use of suitable molding material.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the structural schematic diagram of 1 lens group of embodiment.
Fig. 3 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 2 from left to right.
Fig. 4 is the structural schematic diagram of 2 lens group of embodiment.
Fig. 5 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 4 from left to right.
Fig. 6 is the structural schematic diagram of 3 lens group of embodiment.
Fig. 7 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 6 from left to right.
Fig. 8 is the structural schematic diagram of 4 lens group of embodiment.
Fig. 9 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 8 from left to right.
Specific implementation mode
Ultra-wide angle optical camera lens group as shown in Figure 1 includes sequentially by object side to image side：
First lens 1 have negative refracting power；It is concave surface at its image side surface dipped beam axis, can effectively expands optical lens visual angle, increases
Image capture is added to enclose.
Second lens 2 have positive refracting power；It is convex surface at its object side surface dipped beam axis, is at the dipped beam axis of image side surface
Concave surface.It can provide optical lens positive refracting power, help and correct astigmatism to promote image quality, and help to shorten optical lens
Total length.
The third lens 3 have positive refracting power, at the dipped beam axis of image side surface are convex surface；Optical lens total length can further be shortened
Effect, maintain its miniaturization.
4th lens 4 have negative refracting power, are included at least for concave surface, the off-axis place in image side surface at the dipped beam axis of image side surface
One convex surface；The aberration located at optical lens dipped beam axis and off axis can be corrected, image quality is effectively promoted.5th lens 5 have just
It is concave surface at refracting power, image side surface dipped beam axis, place includes at least a convex surface off axis on image side surface；At its object side surface dipped beam axis
For convex surface, the principal point (Principal Point) of optical lens can be made far from image side end, be conducive to shorten its back focal length to maintain
Miniaturization, and can effectively at modified off-axis aberration, further promote whole image quality.Wherein, 1 focal length of the first lens is
F1,2 focal length of the second lens are f2, and 3 focal length of the third lens is f3, and 4 focal length of the 4th lens is f4, and 5 focal length of the 5th lens is f5, whole
The focal length value of a lens set is f, meets following relationship：-1<|f1|/f2<3.0,-1<|f3|/f<2.Optical lens is bent
Folding power configuration helps to shorten total length, maintains its miniaturization.
The half at maximum visual angle is HFOV in lens group, and the optical axis distance on the first lens object side surface to imaging surface is
TL meets：TL/tan(HFOV)<1.5mm.The refractive index of first lens is N1, and the refractive index of the second lens is N2, the third lens
Refractive index be N3, the refractive index of the 4th lens is N4, and the refractive index of the 5th lens is N5, wherein in N1, N2, N3, N4 and N5
The maximum is Nmax, meets following condition：1.50<Nmax<1.70, just can make optical lens more and can show big visual angle with it is short total
The features such as long, effectively maintain its miniaturization.
The image side surface of the third lens 3 is spherical surface or aspherical, object side is spherical surface or aspherical.The image side of 4th lens 4
Face and object side are aspherical.The image side surface of 5th lens 5 and be aspherical without side.When lens material be plastics,
Production cost can effectively be reduced.Separately when lens use spherical surface, it is glass that can change material, then can increase optical lens and bend
Roll over the degree of freedom of power configuration.In addition, object side surface and image side surface in optical lens can be aspherical (ASP), it is aspherical can
With the shape for being easy to be fabricated to other than spherical surface, more control variable is obtained, to cut down aberration, and then reduces what lens used
Number, therefore can effectively reduce the total length of optical lens of the present invention.
Embodiment 1
It is described in detail with reference to Fig. 2 and Fig. 3：
Ultra-wide angle optical camera lens group in embodiment 1 includes sequentially by object side to image side：
First lens 1 have negative refracting power；Second lens 2 have positive refracting power；The third lens 3 have positive refracting power, image side
It is convex surface at the dipped beam axis of surface；4th lens 4, with off-axis for concave surface, image side surface at negative refracting power, image side surface dipped beam axis
Place includes at least a convex surface；5th lens 5, have positive refracting power, at the dipped beam axis of image side surface be concave surface, image side surface is located off axis
Including at least a convex surface.
Wherein, 1 focal length of the first lens is f1, and 2 focal length of the second lens is f2, and 3 focal length of the third lens is f3, the 4th lens 4
Focal length is f4, and 5 focal length of the 5th lens is f5, and the focal length value of entire lens set is f, meets following relationship：-1<|f1|/f2<
3.0、-1<|f3|/f<2。
The half at maximum visual angle is HFOV, the distance on the first lens object side surface to the axis of imaging surface in lens group
For TL, meet： TL/tan(HFOV)<1.5mm.The refractive index of first lens 1 is N1, and the refractive index of the second lens 2 is N2, the
The refractive index of three lens 3 is N3, and the refractive index of the 4th lens 4 is N4, and the refractive index of the 5th lens 5 is N5, wherein N1, N2, N3,
The maximum is Nmax in N4 and N5, meets following condition：1.50<Nmax<1.70.
The image side surface of the third lens 3 is aspherical, object side is aspherical.The image side surface of 4th lens 4 and object side are equal
It is aspherical.The image side surface of 5th lens 5 and object side are aspherical.
In the optical shooting lens group of embodiment 1, the focal length of optical shooting lens group is f, the light of optical shooting lens group
Circle value F-number) it is Fno, the half at maximum visual angle is HFOV in optical shooting lens group, and numerical value is as follows：F=1.268 is public
Li (mm), Fno=2.25, HFOV=60 degree (deg.).
Wherein：Radius of curvature, thickness and focal length unit are mm, and surface 0-14 indicates the surface by object side to image side.It is infrared
The material that line filters out filtering assembly is glass, is set between the 5th lens and imaging surface, has no effect on image capture optical
The focal length of lens systems.
Ultra-wide angle optical camera lens group optical shot for image capture group in embodiment 1 is provided with an aperture, and aperture system
It is set between the second lens and the third lens, it is possible to provide wide viewing angle configures advantage, and each in the first lens to the 5th lens
Mirror all have it is at least one aspherical, can update the system aberration, further shorten lens group overall length.
Following table is aspherical surface data in embodiment 1：
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate the aspherical system of each surface 1-16 ranks
Number.
The aspherical fitting equation of above-mentioned each lens indicates as follows：
Wherein, z is along optical axis direction in the positional value that be highly the position of h make to refer to surface vertices；
C is the inverse of radius of curvature；
k：Conical surface coefficient；
And
A, B, C, D, E, G ... be order aspherical coefficients.
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate that a surface 1-16 ranks are aspherical
Coefficient.
Pick-up lens group aberration and astigmatism according to Fig. 2,3 given by embodiment 1 balance, and can realize good
Image quality.
Embodiment 2
It is described in detail in conjunction with Fig. 4,5：Wherein omit part same as Example 1：
Following table is 2 detailed structured data of embodiment：
Wherein：Radius of curvature, thickness and focal length unit are mm, and surface 0-14 indicates the surface by object side to image side.Infrared ray is filtered
Except the material of filtering assembly is glass, it is set between the 5th lens and imaging surface, has no effect on image capture optical eyeglass
The focal length of system.
Ultra-wide angle optical camera lens group optical shot for image capture group in embodiment 2 is provided with an aperture, and aperture system
It is set between the second lens and the third lens, it is possible to provide wide viewing angle configures advantage, and each in the first lens to the 5th lens
Mirror all have it is at least one aspherical, can update the system aberration, further shorten lens group overall length.
Following table is aspherical surface data in embodiment 2：
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate the aspherical system of each surface 1-16 ranks
Number.
The aspherical fitting equation of above-mentioned each lens indicates as follows：
Wherein, z is along optical axis direction in the positional value that be highly the position of h make to refer to surface vertices；
C is the inverse of radius of curvature；
k：Conical surface coefficient；
And
A, B, C, D, E, G ... be order aspherical coefficients.
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate that a surface 1-16 ranks are aspherical
Coefficient.
Pick-up lens group aberration and astigmatism according to Fig. 4,5 given by embodiment 2 balance, and can realize good
Image quality.
Embodiment 3
It is described in detail in conjunction with Fig. 6,7：Wherein omit part same as Example 1：
Following table is 3 detailed structured data of embodiment：
Wherein：Radius of curvature, thickness and focal length unit are mm, and surface 0-14 indicates the surface by object side to image side.Infrared ray is filtered
Except the material of filtering assembly is glass, it is set between the 5th lens and imaging surface, has no effect on image capture optical eyeglass
The focal length of system.
Ultra-wide angle optical camera lens group optical shot for image capture group in embodiment 3 is provided with an aperture, and aperture system
It is set between the second lens and the third lens, it is possible to provide wide viewing angle configures advantage, and each in the first lens to the 5th lens
Mirror all have it is at least one aspherical, can update the system aberration, further shorten lens group overall length.
Following table is aspherical surface data in embodiment 3：
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate the aspherical system of each surface 1-16 ranks
Number.
The aspherical fitting equation of above-mentioned each lens indicates as follows：
Wherein, z is along optical axis direction in the positional value that be highly the position of h make to refer to surface vertices；
C is the inverse of radius of curvature；
k：Conical surface coefficient；
And
A, B, C, D, E, G ... be order aspherical coefficients.
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate that a surface 1-16 ranks are aspherical
Coefficient.
Pick-up lens group aberration and astigmatism according to Fig. 6,7 given by embodiment 3 balance, and can realize good
Image quality.
Embodiment 4
It is described in detail in conjunction with Fig. 8,9：Wherein omit part same as Example 1：
Following table is 4 detailed structured data of embodiment：
Wherein：Radius of curvature, thickness and focal length unit are mm, and surface 0-14 indicates the surface by object side to image side.Infrared ray is filtered
Except the material of filtering assembly is glass, it is set between the 5th lens and imaging surface, has no effect on image capture optical eyeglass
The focal length of system.
Ultra-wide angle optical camera lens group optical shot for image capture group in embodiment 4 is provided with an aperture, and aperture system
It is set between the second lens and the third lens, it is possible to provide wide viewing angle configures advantage, and each in the first lens to the 5th lens
Mirror all have it is at least one aspherical, can update the system aberration, further shorten lens group overall length.
Following table is aspherical surface data in embodiment 4：
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate the aspherical system of each surface 1-16 ranks
Number.
The aspherical fitting equation of above-mentioned each lens indicates as follows：
Wherein, z is along optical axis direction in the positional value that be highly the position of h make to refer to surface vertices；
C is the inverse of radius of curvature；
k：Conical surface coefficient；
And
A, B, C, D, E, G ... be order aspherical coefficients.
Wherein：K indicates that the conical surface coefficient in aspheric curve equation, A1-A16 indicate that a surface 1-16 ranks are aspherical
Coefficient.
Pick-up lens group aberration and astigmatism according to Fig. 8,9 given by embodiment 4 balance, can realize it is good at
As quality.
Claims (6)
1. ultra-wide angle optical camera lens group, it is characterized in that：Include sequentially by object side to image side：
First lens（1）, there is negative refracting power；
Second lens（2）, there is positive refracting power；
The third lens（3）, there is positive refracting power, at the dipped beam axis of image side surface be convex surface；
4th lens（4）, there is negative refracting power, place includes at least one off axis for concave surface, image side surface at the dipped beam axis of image side surface
Convex surface；
5th lens（5）, have positive refracting power, at the dipped beam axis of image side surface be concave surface, place includes at least one off axis on image side surface
Convex surface；
Wherein, the first lens（1）Focal length is f1, the second lens（2）Focal length is f2, the third lens（3）Focal length is f3, the 4th lens
（4）Focal length is f4, the 5th lens（5）Focal length is f5, and the focal length value of entire lens set is f, meets following relationship：-1<|f1
|/f2<3.0、-1<|f3|/f<2。
2. ultra-wide angle optical camera lens group according to claim 1, it is characterized in that：The half at maximum visual angle in lens group
For HFOV, the distance on the first lens object side surface to the axis of imaging surface is TL, is met：TL/tan(HFOV)<1.5mm.
3. ultra-wide angle optical camera lens group according to claim 1, it is characterized in that：First lens（1）Refraction
Rate is N1, the second lens（2）Refractive index be N2, the third lens（3）Refractive index be N3, the 4th lens（4）Refractive index be
N4, the 5th lens（5）Refractive index be N5, wherein in N1, N2, N3, N4 and N5 the maximum be Nmax, meet following condition：
1.50<Nmax<1.70。
4. ultra-wide angle optical camera lens group according to claim 1, it is characterized in that：The third lens（3）Image side
Face is spherical surface or aspherical, object side is spherical surface or aspherical.
5. ultra-wide angle optical camera lens group according to claim 1, it is characterized in that：4th lens（4）Image side
Face and object side are aspherical.
6. ultra-wide angle optical camera lens group according to claim 1, it is characterized in that：5th lens（5）Image side
Face and object side are aspherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810922792.6A CN108761740A (en) | 2018-08-14 | 2018-08-14 | Ultra-wide angle optical camera lens group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810922792.6A CN108761740A (en) | 2018-08-14 | 2018-08-14 | Ultra-wide angle optical camera lens group |
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| Publication Number | Publication Date |
|---|---|
| CN108761740A true CN108761740A (en) | 2018-11-06 |
Family
ID=63970044
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810922792.6A Withdrawn CN108761740A (en) | 2018-08-14 | 2018-08-14 | Ultra-wide angle optical camera lens group |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879456A (en) * | 2019-11-26 | 2020-03-13 | 歌尔股份有限公司 | Projection lens group, projection optical system and augmented reality equipment |
| CN111399194A (en) * | 2020-06-04 | 2020-07-10 | 江西联创电子有限公司 | Wide-angle lens and imaging apparatus |
| CN114779432A (en) * | 2022-03-10 | 2022-07-22 | 东莞晶彩光学有限公司 | Wide-angle optical lens |
| CN114779449A (en) * | 2022-04-26 | 2022-07-22 | 东莞晶彩光学有限公司 | Wide-view-angle lens for close-range shooting |
| US12000991B2 (en) | 2021-02-26 | 2024-06-04 | Largan Precision Co., Ltd. | Optical image capturing lens assembly, imaging apparatus and electronic device |
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| JP2005077692A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Corp | Variable power imaging lens |
| CN103869451A (en) * | 2012-12-10 | 2014-06-18 | 大立光电股份有限公司 | Wide-angle camera lens group |
| CN208654420U (en) * | 2018-08-14 | 2019-03-26 | 江苏光腾光学有限公司 | Ultra-wide angle optical camera lens group |
-
2018
- 2018-08-14 CN CN201810922792.6A patent/CN108761740A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077692A (en) * | 2003-08-29 | 2005-03-24 | Kyocera Corp | Variable power imaging lens |
| CN103869451A (en) * | 2012-12-10 | 2014-06-18 | 大立光电股份有限公司 | Wide-angle camera lens group |
| CN208654420U (en) * | 2018-08-14 | 2019-03-26 | 江苏光腾光学有限公司 | Ultra-wide angle optical camera lens group |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879456A (en) * | 2019-11-26 | 2020-03-13 | 歌尔股份有限公司 | Projection lens group, projection optical system and augmented reality equipment |
| CN110879456B (en) * | 2019-11-26 | 2022-03-25 | 歌尔光学科技有限公司 | Projection lens group, projection optical system and augmented reality equipment |
| CN111399194A (en) * | 2020-06-04 | 2020-07-10 | 江西联创电子有限公司 | Wide-angle lens and imaging apparatus |
| US12000991B2 (en) | 2021-02-26 | 2024-06-04 | Largan Precision Co., Ltd. | Optical image capturing lens assembly, imaging apparatus and electronic device |
| CN114779432A (en) * | 2022-03-10 | 2022-07-22 | 东莞晶彩光学有限公司 | Wide-angle optical lens |
| CN114779432B (en) * | 2022-03-10 | 2023-09-08 | 东莞晶彩光学有限公司 | Wide-angle optical lens |
| CN114779449A (en) * | 2022-04-26 | 2022-07-22 | 东莞晶彩光学有限公司 | Wide-view-angle lens for close-range shooting |
| CN114779449B (en) * | 2022-04-26 | 2023-09-08 | 东莞晶彩光学有限公司 | Wide-angle lens for close-range shooting |
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Application publication date: 20181106 |