CN208672895U - Optical shooting lens group - Google Patents
Optical shooting lens group Download PDFInfo
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- CN208672895U CN208672895U CN201821307323.5U CN201821307323U CN208672895U CN 208672895 U CN208672895 U CN 208672895U CN 201821307323 U CN201821307323 U CN 201821307323U CN 208672895 U CN208672895 U CN 208672895U
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Abstract
The utility model discloses optical shooting lens groups, sequentially include by object side to image side: the first lens, are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive refracting power；Second lens, have negative refracting power, are concave surface at the object side surface dipped beam axis of the second lens, at the dipped beam axis of image side surface are convex surface；The third lens are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive refracting power；4th lens are concave surface at the dipped beam axis of object side surface, are convex surface at the dipped beam axis of image side surface and have positive refracting power；5th lens are concave surface at the dipped beam axis of object side surface, image side surface locates at least one concave surface off axis and has negative refracting power；Wherein, f1/f2<0 and f2/f5>0.Lens group color difference and astigmatism balance, and can be realized good image quality.
Description
Technical field
The utility model relates to the small-sized image pickups of use for electronic products, taking lens field, and in particular to a kind of optical image-taking
Lens group.
Background technique
With the Sheng of the high standards running gear such as smartphone (SmartPhone) and tablet computer (Tablet PC)
Row drives phtographic lens rapid soaring on picture element and image quality, five chip lens groups is also proposed in field, the phase can provide
Superior image quality.However, refracting power configuration is bad between the usual common lens of five chips lens group, and influence the color of system
The problem of difference and image curvature, is not able to satisfy high-order image quality required in field.Therefore, it is badly in need of a kind of meeting in field
Under conditions of miniaturization, has the phtographic lens of good amendment color difference and image curvature ability.
Utility model content
The utility model overcomes existing defect to provide a kind of optical shooting lens group, has good amendment color difference and as curved
Qu Nengli.
The utility model is achieved through the following technical solutions:
Optical shooting lens group sequentially includes by object side to image side:
First lens are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive refracting power；
Second lens have negative refracting power, are concave surface, image side surface dipped beam axis at the object side surface dipped beam axis of the second lens
Place is convex surface；
The third lens are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive refracting power；
4th lens are concave surface at the dipped beam axis of object side surface, are convex surface at the dipped beam axis of image side surface and have positive refracting power；
5th lens are concave surface at the dipped beam axis of object side surface, at least one concave surface is located on image side surface off axis and are had negative
Refracting power；
Wherein, first focal length of lens is f1, and second focal length of lens is f2, and the third lens focal length is f3, the 4th focal length of lens
For f4, the 5th focal length of lens is f5, meets following relationship: f1/f2<0 and f2/f5>0.
The further improvement project of the utility model is that the abbe number of first lens is V1, the color of the second lens
Dissipating coefficient is V2, and the abbe numbers of the 4th lens is V4, meets following relationship: 0 < (V1-V2)/V4 < 2 and 0 < V4/V5 <
1.5；
The further improvement project of the utility model is that the object side surface and image side surface of the 5th lens are aspheric
Face.
The further improvement project of the utility model is, first lens, the second lens, the third lens, the 4th lens,
The material of 5th lens is plastics or is glass.
Further, aperture is set between object and first lens.
Compared to the prior art the utility model has the advantage that
Lens set of the invention for compact apparatus optimize, be conducive to realize large viewing under short overall length, color difference with
Astigmatism balance, can obtain high-order image quality.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model.
Fig. 2 by 1 lens group of embodiment structural schematic diagram.
Fig. 3 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 2 from left to right.
Fig. 4 by 2 lens group of embodiment structural schematic diagram.
Fig. 5 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 4 from left to right.
Fig. 6 by 3 lens group of embodiment structural schematic diagram.
Fig. 7 is lens group spherical aberration, astigmatism and distortion curve graph in Fig. 6 from left to right.
Specific embodiment
Optical shooting lens group as shown in Figure 1 sequentially includes by object side to image side:
First lens 1 are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive flexion
Power；First lens have positive refracting power, help to shorten knot as the total length of lens set.Second lens 2 have negative refracting power,
And it is concave surface at the dipped beam axis of object side surface, at the dipped beam axis of image side surface is convex surface；Astigmatism the first lens of balance can be corrected to be produced
Raw aberration facilitates lens error correction to control the quality of image.The third lens 3 are convex surface, image side at the dipped beam axis of object side surface
For concave surface and with positive refracting power at the dipped beam axis of surface；Aberration and astigmatism can be corrected, and effectively suppresses the light of off-axis visual field
Line is incident in the angle on image sensing component, promotes the response efficiency of image, sensing component.4th lens 4, object side surface
It is concave surface at dipped beam axis, is convex surface at the dipped beam axis of image side surface and there is positive refracting power；Spherical aberration and amendment astigmatism can be effectively reduced.
5th lens 5 are concave surface at the dipped beam axis of object side surface, image side surface locates at least one concave surface off axis and has negative refracting power；
Make principal point far from imaging surface to reduce back focal length and suppress overall length, additionally it is possible to effective modified off-axis visual field aberration.And it effectively presses
The light for making off-axis visual field is incident in angle on image sensing component, promotes the response efficiency of image sensing component.
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, meets following relationship: f1/f2<0 and f2/f5>0.
The abbe number of first lens 1 is V1, and the abbe number of the second lens 2 is V2, and the abbe number of the 4th lens 4 is
V4 meets following relationship: 0 < (V1-V2)/V4 < 2 and 0 < V4/V5 < 1.5；Color difference can be allowed relatively to be suitble to astigmatism
Balance, and be suitble to molding material compared with that can make full use of.
The object side surface and image side surface of 5th lens 5 are aspherical.It is aspherical to be easy to be fabricated to other than spherical surface
Shape, obtain more control variable, to cut down aberration, and then using the number of lens needed for reducing, therefore can have
Effect reduces optics total length.
First lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5 material be plastics or be glass
Glass.
Embodiment 1
It is described in detail below with reference to Fig. 2 and Fig. 3:
In embodiment 1, the first lens 1 are convex surface at the dipped beam axis of object side surface, at the dipped beam axis of image side surface are concave surface and tool
There is positive refracting power；Second lens 2 have negative refracting power；The third lens 3 are convex surface at the dipped beam axis of object side surface, image side surface is close
For concave surface and with positive refracting power at optical axis；4th lens 4 are concave surface at the dipped beam axis of object side surface, at the dipped beam axis of image side surface
For convex surface and there is positive refracting power；5th lens 5 are concave surface at the dipped beam axis of object side surface, image side surface locates at least one off axis
A concave surface and have negative refracting power.
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=3.379 is public
Li (mm), Fno=2.0, HFOV=40.7 degree (deg.).
First lens, 1 focal length is f1, and 2 focal length of the second lens is f2, and 3 focal length of the third lens is f3, and 4 focal length of the 4th lens is
F4,5 focal length of the 5th lens are f5, meet following relationship: f1/f2<0 and f2/f5>0.The abbe number of first lens 1 is
V1, the abbe number of the second lens 2 are V2, and the abbe number of the 4th lens 4 is V4, meets following relationship: 0 < (V1-
V2)/V4 < 2 and 0 < V4/V5 < 1.5.
The object side surface and image side surface of 5th lens 5 are aspherical.It is at the object side surface dipped beam axis of second lens 2
It is convex surface at concave surface, image side surface dipped beam axis.First lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5
Material be plastics.
Following table is the detailed structured data of embodiment 1:
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 6 is glass, is set between the 5th lens and imaging surface, has no effect on image capture optical
The focal length of lens systems.
Aperture 7 in embodiment 1 is configured to preposition, and preposition aperture implies that aperture is set between object and the first lens,
Preposition aperture can make the outgoing pupil (Exit Pupil) of photographing optical lens group and imaging surface generate longer distance, be allowed to have
There is telecentricity (Telecentric) effect, the efficiency that electronics photosensory assembly such as CCD or CMOS receive image can be increased.Embodiment 1
An aperture diaphragm (Aperture Stop) is arranged in lens group, helps to reduce stray light to promote the quality of image.
Following table is aspherical surface data in embodiment 1:
The aspherical fitting equation of above-mentioned each lens is expressed 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.
A1-A16 indicates each surface 1-16 rank asphericity coefficient.
Pick-up lens group color difference given by embodiment 1 and astigmatism balance according to Fig. 2,3, can be realized it is good at
As quality.
Embodiment 2
It is described in detail in conjunction with Fig. 4,5: wherein omitting part same as Example 1:
Following table is the detailed structured data of embodiment 2:
Wherein: radius of curvature, thickness and focal length unit are mm, and surface 0-14 indicates each lens by the table of object side to image side
Face.The material that infrared ray filters out filtering assembly 6 is glass, is set between the 5th lens and imaging surface, has no effect on image
The focal length of capture optical lens systems.
Aperture 7 in embodiment 2 is configured to preposition, and preposition aperture implies that aperture is set between object and the first lens.
An aperture diaphragm (Aperture Stop) is arranged in the lens group of embodiment 2, helps to reduce stray light to promote the quality of image.
Following table is aspherical surface data in embodiment 2:
The aspherical fitting equation of above-mentioned each lens is expressed 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.
A1-A16 indicates each surface 1-16 rank asphericity coefficient.
Pick-up lens group color difference given by embodiment 1 and astigmatism balance according to Fig. 4,5, can be realized good
Image quality.
Embodiment 3
It is described in detail in conjunction with Fig. 6,7: wherein omitting part same as Example 1:
Following table is the detailed structured data of embodiment 3:
Wherein: radius of curvature, thickness and focal length unit are mm, and surface 0-14 indicates each lens by the table of object side to image side
Face.The material that infrared ray filters out filtering assembly 6 is glass, is set between the 5th lens and imaging surface, has no effect on image
The focal length of capture optical lens systems.
Aperture 7 in embodiment 3 is configured to preposition, and preposition aperture implies that aperture is set between object and the first lens.
An aperture diaphragm (Aperture Stop) is arranged in the lens group of embodiment 3, helps to reduce stray light to promote the quality of image.
Following table is aspherical surface data in embodiment 3:
The aspherical fitting equation of above-mentioned each lens is expressed 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.
A1-A16 indicates each surface 1-16 rank asphericity coefficient.
Pick-up lens group color difference given by embodiment 1 and astigmatism balance according to Fig. 6,7, can be realized it is good at
As quality.
Claims (6)
1. optical shooting lens group, it is characterized in that: sequentially including by object side to image side:
First lens (1) are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive refracting power；
Second lens (2) have negative refracting power；
The third lens (3) are convex surface at the dipped beam axis of object side surface, are concave surface at the dipped beam axis of image side surface and have positive refracting power；
4th lens (4) are concave surface at the dipped beam axis of object side surface, are convex surface at the dipped beam axis of image side surface and have positive refracting power；
5th lens (5) are concave surface at the dipped beam axis of object side surface, at least one concave surface is located on image side surface off axis and have negative bend
Roll over power；
Wherein, the first lens (1) focal length is f1, and the second lens (2) focal length is f2, and the third lens (3) focal length is f3, the 4th lens
(4) focal length is f4, and the 5th lens (5) focal length is f5, meets following relationship: f1/f2<0 and f2/f5>0.
2. optical shooting lens group according to claim 1, it is characterized in that: the abbe number of first lens (1) is
V1, the abbe numbers of the second lens (2) are V2, and the abbe number of the 4th lens (4) is V4, meet following relationship: 0 <
(V1-V2)/V4 < 2 and 0 < V4/V5 < 1.5.
3. optical shooting lens group according to claim 1, it is characterized in that: the object side surface of the 5th lens (5) and
Image side surface is aspherical.
4. optical shooting lens group according to claim 1, it is characterized in that: the object side surface dipped beam axis of the second lens (2)
Place is concave surface, at the dipped beam axis of image side surface is convex surface.
5. optical shooting lens group according to claim 1, it is characterized in that: first lens (1), the second lens (2),
The third lens (3), the 4th lens (4), the 5th lens (5) material be plastics or be glass.
6. optical shooting lens group according to any one of claims 1 to 5, it is characterized in that: aperture (7) is set to object
Between first lens (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821307323.5U CN208672895U (en) | 2018-08-14 | 2018-08-14 | Optical shooting lens group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821307323.5U CN208672895U (en) | 2018-08-14 | 2018-08-14 | Optical shooting lens group |
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| Publication Number | Publication Date |
|---|---|
| CN208672895U true CN208672895U (en) | 2019-03-29 |
Family
ID=65837474
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821307323.5U Active CN208672895U (en) | 2018-08-14 | 2018-08-14 | Optical shooting lens group |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761741A (en) * | 2018-08-14 | 2018-11-06 | 江苏光腾光学有限公司 | Optical shooting lens group |
| CN110221410A (en) * | 2019-06-30 | 2019-09-10 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
-
2018
- 2018-08-14 CN CN201821307323.5U patent/CN208672895U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761741A (en) * | 2018-08-14 | 2018-11-06 | 江苏光腾光学有限公司 | Optical shooting lens group |
| CN110221410A (en) * | 2019-06-30 | 2019-09-10 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN110221410B (en) * | 2019-06-30 | 2021-07-30 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
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