CN106646837A - Fish-eye lens - Google Patents
Fish-eye lens Download PDFInfo
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- CN106646837A CN106646837A CN201710167949.4A CN201710167949A CN106646837A CN 106646837 A CN106646837 A CN 106646837A CN 201710167949 A CN201710167949 A CN 201710167949A CN 106646837 A CN106646837 A CN 106646837A
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- lens
- abbe number
- refractive index
- fish eye
- glass
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides a novel fish-eye lens. The fish-eye lens has eight groups of structures comprising ten lenses in total, wherein two cemented lens groups are included; from the object end to the imaging end along the optical axis direction the first cemented lens is formed by cementing a fourth lens and a fifth lens, and the second cemented lens is formed by cementing a sixth lens and a seventh lens. According to the fish-eye lens, a purple boundary is corrected, the optical structure is optimized, the aberration is greatly improved by matching chromatic dispersions of the ten lenses from higher to lower, and the purple boundary after imaging is corrected, so that the imaging purple boundary range is narrower than that of a first version of products.
Description
Technical field
The present invention relates to a kind of fish eye lens.
Background technology
Fish eye lens belongs to a kind of special lens in bugeye lens, and its visual angle usually is out what human eye to be seen
Scope.Therefore, there is very big difference in the scene of the real world in fish eye lens and human eye.Human eye is seen in real life
The world be well-regulated solid form, and by fish eye lens produce picture effect then there are various distortion.Ordinary circumstance
Under, fish eye lens can be understood as not doing the bugeye lens of pattern distortion correction, and this feature causes fish-eye visual angle
May be designed to close or equal to 180 °.
Due to not doing distortion correction, fish eye lens structure can avoid using special lens, such as aspherical lens, low color
The eyeglass of the high cost such as scattered eyeglass, glasses lens plated material or processing technology, this causes fish eye lens to have relative to bugeye lens
More cheap manufacturing cost, its performance is substantially can just to meet fish-eye optical system using spherical mirror
Require.
Into after the digital age, digital camera in shooting process, due to subject light contrast it is larger, bloom with
The color spot that low smooth position intersection occurs, mostly purple (or other colors), are referred to as " purple boundary ".In film epoch, purple boundary
Problem does not almost include problem.But to the digital age, purple boundary is just into a distinct issues.
Purple boundary Producing reason is many, and control of the camera lens to dispersion is an important means for reducing purple boundary.By
In bugeye lens architectural characteristic inherently, exist because lens design causes picture centre uneven with the luminous flux at edge
It is even, cause purple boundary phenomenon to become apparent from.
Therefore, one fish eye lens with low cost and that purple boundary can be optimized of digital age needs.
The content of the invention：
It is an object of the invention to provide a kind of novel fish eye lens.
The fish eye lens has eight groups of ten lens arrangements, wherein comprising two cemented lens groups；Along its optical axis direction
By object to imaging end, the first cemented lens group is bonded by the 4th and the 5th lens, second cemented lens
Group is bonded by the 6th and the 7th lens.
Above-mentioned fish eye lens the second cemented lens group effective focal length is 15mm.
The six-element lens is refractive index 1.78-1.90 glass lens, and its abbe number is 20-30, and focal length is 8mm,
R1 curvature radius are 4-6, and R2 curvature radius are -6～-10.The six-element lens refractive index preferably 1.83, its dispersion system
Number is preferably 26.
7th lens are refractive index 1.78-1.95 glass lens；Its abbe number is 20-30, and focal length is -8mm,
R1 curvature radius are 3-6；R2 curvature radius are -10～-15.7th index of refraction in lens preferably 1.80, its dispersion
Coefficient is preferably 25.
The 8th lens of the fish eye lens are the glass lens of refractive index 1.78-1.95, and its abbe number is 20-30,
Focal length is -10mm, and R1 curvature radius are 15-20, and R2 curvature radius are 3-6.8th lens are preferably refractive index
1.88 glass lens, its abbe number is preferably 25.
The fish eye lens the first cemented lens group effective focal length is 12mm.
4th lens be refractive index 1.78-1.95 glass lens, its abbe number be 20-30, focal length for-
10mm, R1 face is plane, and R2 curvature radius are 3-6.4th index of refraction in lens preferably 1.86, its abbe number is preferred
For 25.
5th lens are refractive index 1.78-1.95 glass lens, and its abbe number is 20-30, and focal length is 4mm,
R1 curvature radius are 3-6, and R2 curvature radius are -10～-15.5th index of refraction in lens preferably 1.90, its dispersion
Coefficient is preferably 25.
The fish eye lens first piece lens are the glass lens of refractive index 1.5-1.6, and its abbe number is 70-75, burnt
Away from for -15mm, R1 curvature radius are 15-18, and R2 curvature radius are 8-10.The first piece index of refraction in lens is preferred
1.55, its abbe number is preferably 72.
Second lens of the fish eye lens are the glass lens of refractive index 1.75-1.90, and its abbe number is 40-50,
Focal length is -8mm, and R1 curvature radius are 15-20, and R2 curvature radius are 3-6.Second index of refraction in lens is preferred
1.80, its abbe number is preferably 45.
The 3rd lens of the fish eye lens are the glass lens of refractive index 1.80-1.85, and abbe number is 30-35, burnt
Away from for -7mm, it is 4-10 that R1 curvature radius are -10～-12, R2 curvature radius.3rd index of refraction in lens is preferred
1.82, its abbe number is preferably 34.
The 9th lens of the fish eye lens are the glass lens of refractive index 1.70-1.80, and its abbe number is 50-60,
Focal length is 7mm, and R1 curvature radius are 15-20, and R2 curvature radius are -10～-15.9th index of refraction in lens is preferred
1.75, its abbe number is preferably 55.
The tenth lens of the fish eye lens for refractive index 1.40-1.55 glass lens, abbe number 70-80, focal length
For 8mm, R1 curvature radius are 3-6, R2 facial planes.Described ten index of refraction in lens preferably 1.55, abbe number is preferably
75。
Description of the drawings
Fig. 1 is fish-eye optical system structure schematic diagram of the present invention.
Fig. 2 is first edition chromaticity difference diagram (in 0.43nm wave band maximums more than 10).
Fig. 3 is second edition chromaticity difference diagram (in 0.43nm wave band maximums 3 or so).
Fig. 4 is 230 ° of MTF curve figures.
Fig. 5 is 230 ° of DIST curve maps.
Fig. 6 is 230 ° of acutance figures.
Specific embodiment：
As shown in Fig. 1-6, in order that the object, technical solutions and advantages of the present invention are of greater clarity.With reference to specific
Embodiment, the present invention is described in detail.During this, the description to known features and technology is eliminated, to avoid
To unnecessarily obscuring idea of the invention.It is simply exemplary for these descriptions.It is not to limit the scope of the present invention.
The fish eye lens has eight groups of ten lens arrangements, wherein comprising two cemented lens groups；Along its optical axis direction
By object to imaging end, the first cemented lens group is bonded by the 4th and the 5th lens, second cemented lens
Group is bonded by the 6th and the 7th lens.
Every lens adopt different refraction materials so that light changes, so as to resolving power reaches most preferably；Specifically
It is as follows：
The higher glass material of the relatively low abbe number of the refractive index of first piece lens 1；(ranges of indices of refraction 1.5-1.6 is preferred
1.55 or so；Abbe number scope 70-75 preferably 72 or so) focal length：F=-15mm radius of curvature：R1 faces 15-18；R2 faces 8-
10。
The relatively low glass material of the higher abbe number of second refractive index of lens 2；(ranges of indices of refraction 1.75-1.90 is preferred
1.80 or so；Abbe number scope 40-50 preferably 45 or so) focal length：F=-8mm radius of curvature：R1 faces 15-20；R2 faces 3-6.
The relatively low glass material of the higher abbe number of 3rd refractive index of lens 3；(ranges of indices of refraction 1.8-1.85 is preferred
1.82 or so；Abbe number scope 30-35 preferably 34 or so) focal length：F=-7mm radius of curvature：R1 faces -10～-12；R2 faces 4-
10。
The higher glass material of the relatively low abbe number of 4th refractive index of lens 4；(ranges of indices of refraction 1.78-1.95 is preferred
1.86 or so；Abbe number scope 20-30 preferably 25 or so) focal length：F=4mm radius of curvature：R1 faces 3-6；R2 faces -10～-
15。
Four or five lens are cemented lens focal length：F=12mm.
The relatively low glass material of the higher abbe number of the refractive index of six-element lens 6；(ranges of indices of refraction 1.78-1.90 is preferred
1.83 is left
It is right；Abbe number scope 20-30 preferably 26 or so) focal length：F=8mm radius of curvature：R1 faces 4-6；R2 faces -6～-
10。
The relatively low glass material of the higher abbe number of 7th refractive index of lens 7；(ranges of indices of refraction 1.78-1.95 is preferred
1.80 or so；Abbe number scope 20-30 preferably 25 or so) focal length：F=-8mm radius of curvature：R1 faces 3-6；R2 faces -10～-
15。
Six or seven lens are cemented lens focal length：F=15mm.
The relatively low glass material of the higher abbe number of 8th refractive index of lens 8；(ranges of indices of refraction 1.78-1.95 is preferred
1.88 or so；Abbe number scope 20-30 preferably 25 or so) focal length：F=-10mm radius of curvature：R1 faces 15-20；R2 faces 3-6.
The moderate glass material of the moderate abbe number of 9th refractive index of lens 9；(ranges of indices of refraction 1.70-1.80 is preferred
1.75 or so；Abbe number scope 50-60 preferably 55 or so) focal length：F=7mm radius of curvature：R1 faces 15-20；R2 faces -10～-
15。
The higher glass material of the relatively low abbe number of tenth refractive index of lens 10；(ranges of indices of refraction 1.40-1.55 is preferred
1.55 or so；Abbe number scope 70-80 preferably 75 or so) focal length：F=8mm radius of curvature：R1 faces 3-6；R2 facial planes.
100 is imaging plane, i.e. photo-sensitive cell.
The contrast of Fig. 2 and Fig. 3, it is evident that the latter's aberration has larger improvement.
Amendment is made for purple boundary, optical texture is optimized, is collocated with each other by the dispersion from high to low of ten lens,
Purple boundary after imaging is modified so that less than the imaging purple boundary scope of first edition product.
Claims (23)
1. a kind of fish eye lens, it is characterised in that with eight groups of ten lens arrangements, wherein comprising two cemented lens groups；Edge
By object to imaging end, the first cemented lens group is bonded its optical axis direction by the 4th and the 5th lens, and described the
Two cemented lens groups are bonded by the 6th and the 7th lens.
2. fish eye lens according to claim 1, it is characterised in that the second cemented lens group effective focal length is
15mm。
3. fish eye lens according to claim 1 and 2, it is characterised in that the six-element lens is refractive index 1.78-
1.90 glass lens, its abbe number is 20-30, and focal length is 8mm, and R1 curvature radius are 4-6, and R2 curvature radius are -6
～-10.
4. fish eye lens according to claim 3, it is characterised in that the six-element lens is that the glass of refractive index 1.83 is saturating
Mirror, its abbe number is 26.
5. fish eye lens according to claim 1 and 2, it is characterised in that the 7th lens are refractive index 1.78-
1.95 glass lens；Its abbe number is 20-30, and focal length is -8mm, and R1 curvature radius are 3-6；R2 curvature radius are -10
～-15.
6. fish eye lens according to claim 5, it is characterised in that the 7th lens are that the glass of refractive index 1.80 is saturating
Mirror, its abbe number is 25.
7. fish eye lens according to claim 1, it is characterised in that the 8th lens are refractive index 1.78-1.95
Glass lens, its abbe number be 20-30, focal length be -10mm, R1 curvature radius be 15-20, R2 curvature radius be 3-
6。
8. the fish eye lens according to claim 1 or 7, it is characterised in that the 8th lens are the glass of refractive index 1.88
Glass lens, its abbe number is 25.
9. fish eye lens according to claim 1, it is characterised in that the first cemented lens group effective focal length is
12mm。
10. the fish eye lens according to claim 1 or 9, it is characterised in that the 4th lens are refractive index 1.78-
1.95 glass lens, its abbe number is 20-30, and focal length is -10mm, and R1 faces are plane, and R2 curvature radius are 3-6.
11. fish eye lenses according to claim 10, it is characterised in that the 4th lens are the glass of refractive index 1.86
Lens, its abbe number is 25.
12. fish eye lenses according to claim 1 or 9, it is characterised in that the 5th lens are refractive index 1.78-
1.95 glass lens, its abbe number is 20-30, and focal length is 4mm, and R1 curvature radius are 3-6, and R2 curvature radius are -10
～-15.
13. fish eye lenses according to claim 12, it is characterised in that the 5th lens are the glass of refractive index 1.90
Lens, its abbe number is 25.
14. fish eye lenses according to claim 1,2,7 or 9, it is characterised in that the first piece lens are refractive index
The glass lens of 1.5-1.6, its abbe number be 70-75, focal length be -15mm, R1 curvature radius be 15-18, R2 face curvatures
Radius is 8-10.
15. fish eye lenses according to claim 14, it is characterised in that the first piece lens are the glass of refractive index 1.55
Lens, its abbe number is 72.
16. fish eye lenses according to claim 1,2,7 or 9, it is characterised in that second lens are refractive index
The glass lens of 1.75-1.90, its abbe number be 40-50, focal length be -8mm, R1 curvature radius be 15-20, R2 face curvatures
Radius is 3-6.
17. fish eye lenses according to claim 16, it is characterised in that second lens are the glass of refractive index 1.80
Lens, its abbe number is 45.
18. fish eye lenses according to claim 1,2,7 or 9, it is characterised in that the 3rd lens are refractive index
The glass lens of 1.80-1.85, abbe number is 30-35, and focal length is -7mm, and R1 curvature radius are that -10～-12, R2 faces are bent
Rate radius is 4-10.
19. fish eye lenses according to claim 18, it is characterised in that the 3rd lens are the glass of refractive index 1.82
Lens, its abbe number is 34.
20. fish eye lenses according to claim 1,2,7 or 9, it is characterised in that the 9th lens are refractive index
The glass lens of 1.70-1.80, its abbe number is 50-60, and focal length is 7mm, and R1 curvature radius are 15-20, R2 face curvatures
Radius is -10～-15.
21. fish eye lenses according to claim 20, it is characterised in that the 9th lens are the glass of refractive index 1.75
Lens, its abbe number is 55.
22. fish eye lenses according to claim 1,2,7 or 9, it is characterised in that the described ten lens are refractive index
The glass lens of 1.40-1.55, abbe number 70-80, focal length is 8mm, and R1 curvature radius are 3-6, R2 facial planes.
23. fish eye lenses according to claim 22, it is characterised in that the described ten lens are the glass of refractive index 1.55
Glass lens, abbe number 75.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195999 | 2016-03-31 | ||
| CN2016101959999 | 2016-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106646837A true CN106646837A (en) | 2017-05-10 |
| CN106646837B CN106646837B (en) | 2019-01-29 |
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ID=58848449
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710167949.4A Active CN106646837B (en) | 2016-03-31 | 2017-03-21 | Fish eye lens |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261680A (en) * | 1998-12-11 | 2000-08-02 | 美能达株式会社 | Camera lens system |
| CN103713382A (en) * | 2012-10-02 | 2014-04-09 | 索尼公司 | Imaging lens and imaging device |
| CN204832648U (en) * | 2015-06-25 | 2015-12-02 | 厦门云之拓科技有限公司 | Camera lens with super large angle of vision |
| CN105652414A (en) * | 2016-03-28 | 2016-06-08 | 中山依瓦塔光学有限公司 | Fisheye lens purple boundary removal optical system and camera lens with same |
| CN205539672U (en) * | 2016-03-29 | 2016-08-31 | 九江迅通新能源科技有限公司 | Super wide angle micro lens who can be used to monitored control system |
-
2017
- 2017-03-21 CN CN201710167949.4A patent/CN106646837B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261680A (en) * | 1998-12-11 | 2000-08-02 | 美能达株式会社 | Camera lens system |
| CN103713382A (en) * | 2012-10-02 | 2014-04-09 | 索尼公司 | Imaging lens and imaging device |
| CN204832648U (en) * | 2015-06-25 | 2015-12-02 | 厦门云之拓科技有限公司 | Camera lens with super large angle of vision |
| CN105652414A (en) * | 2016-03-28 | 2016-06-08 | 中山依瓦塔光学有限公司 | Fisheye lens purple boundary removal optical system and camera lens with same |
| CN205539672U (en) * | 2016-03-29 | 2016-08-31 | 九江迅通新能源科技有限公司 | Super wide angle micro lens who can be used to monitored control system |
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| Publication number | Publication date |
|---|---|
| CN106646837B (en) | 2019-01-29 |
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Effective date of registration: 20201104 Address after: D403 and d404, 4th floor, District D, No. 8, Jinshan Avenue East, Sanjiao Town, Zhongshan City, Guangdong Province Patentee after: Kaimu (Zhongshan) Electronic Technology Co., Ltd Address before: North Fourth Ring Road 100083 Beijing Haidian District City 229 Haitai building room 1720 Patentee before: USBLEND (BEIJING) TECHNOLOGY Co.,Ltd. |