CN106646837B - Fish eye lens - Google Patents
Fish eye lens Download PDFInfo
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- CN106646837B CN106646837B CN201710167949.4A CN201710167949A CN106646837B CN 106646837 B CN106646837 B CN 106646837B CN 201710167949 A CN201710167949 A CN 201710167949A CN 106646837 B CN106646837 B CN 106646837B
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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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Abstract
The present invention provides a kind of novel fish eye lenses.The fish eye lens has eight groups of ten lens arrangements, wherein including 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, and the second cemented lens group is bonded by the 6th and the 7th lens.The fish eye lens makes amendment for purple boundary, optimizes optical texture, is collocated with each other by the dispersion from high to low of ten lens, have larger improvement to color difference, be modified to the purple boundary after imaging, so that smaller than the imaging purple boundary range of first edition product.
Description
Technical field
The present invention relates to a kind of fish eye lenses.
Background technique
Fish eye lens belongs to one of bugeye lens special lens, its visual angle usually is out what human eye can be seen
Range.Therefore, there is very big difference in the scene of fish eye lens and the real world in human eye.Human eye is seen in real life
The world be well-regulated fixed form, and by fish eye lens generate picture effect then there are various distortion.Ordinary circumstance
Under, fish eye lens can be understood as the bugeye lens for not doing pattern distortion correction, this feature makes fish-eye visual angle
It may be designed to close or equal to 180 °.
Due to not doing distortion correction, fish eye lens structure can be to avoid using special lens, such as aspherical lens, low color
The eyeglass of eyeglass, glasses lens plated contour cost material or processing technology is dissipated, this has fish eye lens relative to bugeye lens
More cheap manufacturing cost, performance be substantially meet fish-eye optical system using spherical mirror
It is required that.
Into after the digital age, digital camera in shooting process, since subject light contrast 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 the film epoch, purple boundary
Problem is almost not counting problem.But to the digital age, purple boundary is just at a distinct issues.
Purple boundary Producing reason be it is various, camera lens to the control of dispersion be reduce purple boundary an important means.By
In the architectural characteristic of bugeye lens inherently, exist because lens design causes the luminous flux at picture centre and edge uneven
It is even, cause purple boundary phenomenon more obvious.
Therefore, the digital age needs a fish eye lens that is low in cost and can optimizing purple boundary.
Summary of the invention:
The purpose of the present invention is to provide a kind of novel fish eye lenses.
The fish eye lens has eight groups of ten lens arrangements, wherein including 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 the second cemented lens of fish eye lens group effective focal length is 15mm.
The six-element lens be refractive index 1.78-1.90 glass lens, abbe number 20-30, focal length 8mm,
R1 curvature radius is 4-6, and R2 curvature radius is -6~-10.The six-element lens refractive index preferably 1.83, dispersion system
Number 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 is 3-6；R2 curvature radius is -10~-15.7th index of refraction in lens preferably 1.80, dispersion
Coefficient is preferably 25.
Glass lens of the 8th lens of the fish eye lens for refractive index 1.78-1.95, abbe number 20-30,
Focal length is -10mm, and R1 curvature radius is 15-20, and R2 curvature radius is 3-6.8th lens are preferably refractive index
1.88 glass lens, abbe number are preferably 25.
The first cemented lens of fish eye lens group effective focal length is 12mm.
4th lens be refractive index 1.78-1.95 glass lens, abbe number 20-30, focal length for-
The face 10mm, R1 is plane, and R2 curvature radius is 3-6.4th index of refraction in lens preferably 1.86, abbe number is preferred
It is 25.
5th lens be refractive index 1.78-1.95 glass lens, abbe number 20-30, focal length 4mm,
R1 curvature radius is 3-6, and R2 curvature radius is -10~-15.5th index of refraction in lens preferably 1.90, dispersion
Coefficient is preferably 25.
First lens of the fish eye lens are the glass lens of refractive index 1.5-1.6, and abbe number 70-75 is burnt
Away from for -15mm, R1 curvature radius is 15-18, and R2 curvature radius is 8-10.First index of refraction in lens is preferred
1.55, abbe number is preferably 72.
Glass lens of second lens of the fish eye lens for refractive index 1.75-1.90, abbe number 40-50,
Focal length is -8mm, and R1 curvature radius is 15-20, and R2 curvature radius is 3-6.Second index of refraction in lens is preferred
1.80, abbe number is preferably 45.
The fish eye lens third piece lens are the glass lens of refractive index 1.80-1.85, and abbe number 30-35 is burnt
Away from for -7mm, R1 curvature radius is that -10~-12, R2 curvature radius is 4-10.The third piece index of refraction in lens is preferred
1.82, abbe number is preferably 34.
Glass lens of the 9th lens of the fish eye lens for refractive index 1.70-1.80, abbe number 50-60,
Focal length is 7mm, and R1 curvature radius is 15-20, and R2 curvature radius is -10~-15.9th index of refraction in lens is preferred
1.75, abbe number is preferably 55.
The tenth lens of the fish eye lens are the glass lens of refractive index 1.40-1.55, abbe number 70-80, focal length
For 8mm, R1 curvature radius is 3-6, R2 facial plane.Described ten index of refraction in lens preferably 1.55, abbe number are preferably
75。
Detailed description of the invention
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 maximum value 10 or more).
Fig. 3 is second edition chromaticity difference diagram (in 0.43nm wave band maximum value 3 or so).
Fig. 4 is 230 ° of MTF curve figures.
Fig. 5 is 230 ° of DIST curve graphs.
Fig. 6 is 230 ° of acutance figures.
Specific embodiment:
As shown in Fig. 1-6, it is illustrated to make the objectives, technical solutions, and advantages of the present invention clearer.In conjunction with specific
Embodiment, the present invention is described in detail.During this, descriptions of well-known structures and technologies are omitted, with to avoid
To unnecessarily obscuring idea of the invention.For these descriptions, only it is exemplary.It is not to limit the scope of the invention.
The fish eye lens has eight groups of ten lens arrangements, wherein including 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 use different refraction materials, so that light changes, so that resolving power reaches best；Specifically
It is as follows:
First higher glass material of the lower abbe number of 1 refractive index of lens；(ranges of indices of refraction 1.5-1.6 is preferred
1.55 left and right；Abbe number range 70-75 preferably 72 or so) focal length: f=-15mm radius of curvature: the face R1 15-18；The face R2 8-
10。
Second lower glass material of the higher abbe number of 2 refractive index of lens；(ranges of indices of refraction 1.75-1.90 is preferred
1.80 left and right；Abbe number range 40-50 preferably 45 or so) focal length: f=-8mm radius of curvature: the face R1 15-20；The face R2 3-6.
The lower glass material of the third piece lens higher abbe number of 3 refractive index；(ranges of indices of refraction 1.8-1.85 is preferred
1.82 left and right；Abbe number range 30-35 preferably 34 or so) focal length: f=-7mm radius of curvature: the face R1-10~-12；The face R2 4-
10。
The 4th higher glass material of the lower abbe number of 4 refractive index of lens；(ranges of indices of refraction 1.78-1.95 is preferred
1.86 left and right；Abbe number range 20-30 preferably 25 or so) focal length: f=4mm radius of curvature: the face R1 3-6；The face R2-10~-
15。
Four or five lens are cemented lens focal length: f=12mm.
The lower glass material of the higher abbe number of 6 refractive index of six-element lens；(ranges of indices of refraction 1.78-1.90 is preferred
1.83 left
It is right；Abbe number range 20-30 preferably 26 or so) focal length: f=8mm radius of curvature: the face R1 4-6；The face R2-6~-
10。
The 7th lower glass material of the higher abbe number of 7 refractive index of lens；(ranges of indices of refraction 1.78-1.95 is preferred
1.80 left and right；Abbe number range 20-30 preferably 25 or so) focal length: f=-8mm radius of curvature: the face R1 3-6；The face R2-10~-
15。
Six or seven lens are cemented lens focal length: f=15mm.
The 8th lower glass material of the higher abbe number of 8 refractive index of lens；(ranges of indices of refraction 1.78-1.95 is preferred
1.88 left and right；Abbe number range 20-30 preferably 25 or so) focal length: f=-10mm radius of curvature: the face R1 15-20；The face R2 3-6.
The moderate glass material of the 9th moderate abbe number of 9 refractive index of lens；(ranges of indices of refraction 1.70-1.80 is preferred
1.75 left and right；Abbe number range 50-60 preferably 55 or so) focal length: f=7mm radius of curvature: the face R1 15-20；The face R2-10~-
15。
The tenth higher glass material of the lower abbe number of 10 refractive index of lens；(ranges of indices of refraction 1.40-1.55 is preferred
1.55 left and right；Abbe number range 70-80 preferably 75 or so) focal length: f=8mm radius of curvature: the face R1 3-6；R2 facial plane.
100 be imaging plane, i.e. photosensitive element.
The comparison of Fig. 2 and Fig. 3, it is evident that the latter's color difference has larger improvement.
Amendment is made for purple boundary, optimizes optical texture, is collocated with each other by the dispersion from high to low of ten lens,
Purple boundary after imaging is modified, so that smaller than the imaging purple boundary range of first edition product.
Claims (11)
1. a kind of fish eye lens, which is characterized in that the 1st to the 10th lens arrangement is sequentially arranged with from the object side to image side, wherein wrapping
Containing two cemented lens groups；Along its optical axis direction by object to imaging end, the first cemented lens group is glued by the 4th and the 5th lens
It closes, the second cemented lens group is bonded by the 6th and the 7th lens；
First lens is glass material；Ranges of indices of refraction 1.5-1.6；Abbe number range 70-75；Focal length: f=-15mm；It is bent
Rate radius: the face R1 15-18mm；The face R2 8-10mm；
Second lens is glass material；Ranges of indices of refraction 1.75-1.90；Abbe number range 40-50；Focal length: f=-8mm；
Radius of curvature: the face R1 15-20mm；The face R2 3-6mm；
Third piece lens are glass materials；Ranges of indices of refraction 1.8-1.85；Abbe number range 30-35；Focal length: f=-7mm；It is bent
Rate radius: -10~-12mm of the face R1；The face R2 4-10mm；
4th lens are glass materials；Ranges of indices of refraction 1.78-1.95；Abbe number range 20-30；Focal length: f=4mm；It is bent
Rate radius: the face R1 3-6mm；- 10~-15mm of the face R2；
5th lens are refractive index 1.78-1.95 glass lens, abbe number 20-30, focal length 4mm；The face R1
Radius of curvature is 3-6mm, and R2 curvature radius is -10~-15mm；
Fourth, fifth lens combination is the first cemented lens group, effective focal length: f=12mm；
Six-element lens is glass material；Ranges of indices of refraction 1.78-1.90；Abbe number range 20-30；Focal length: f=8mm；It is bent
Rate radius: the face R1 4-6mm；- 6~-10mm of the face R2；
7th lens are glass materials；Ranges of indices of refraction 1.78-1.95；Abbe number range 20-30；Focal length: f=-8mm；
Radius of curvature: the face R1 3-6mm；- 10~-15mm of the face R2；
Six, the seven lens combinations are the second cemented lens group, effective focal length: f=15mm；
8th lens are glass materials；Ranges of indices of refraction 1.78-1.95；Abbe number range 20-30；Focal length: f=-10mm；
Radius of curvature: the face R1 15-20mm；The face R2 3-6mm；
9th lens are glass materials；Ranges of indices of refraction 1.70-1.80；Abbe number range 50-60；Focal length: f=7mm；It is bent
Rate radius: the face R1 15-20mm；- 10~-15mm of the face R2；
Tenth lens are glass materials；Ranges of indices of refraction 1.40-1.55；Abbe number range 70-80；Focal length: f=8mm；It is bent
Rate radius: the face R1 3-6mm；The face R2 is plane；
Wherein the face R1 is lens object plane, and the face R2 is lens image planes.
2. fish eye lens according to claim 1, which is characterized in that the six-element lens is that 1.83 glass of refractive index is saturating
Mirror, abbe number 26.
3. fish eye lens according to claim 1, which is characterized in that the 7th lens are that 1.80 glass of refractive index is saturating
Mirror, abbe number 25.
4. fish eye lens according to claim 1, which is characterized in that the 8th lens are that 1.88 glass of refractive index is saturating
Mirror, abbe number 25.
5. fish eye lens according to claim 1, which is characterized in that the 4th lens are that 1.86 glass of refractive index is saturating
Mirror, abbe number 25.
6. fish eye lens according to claim 1, which is characterized in that the 5th lens are that 1.90 glass of refractive index is saturating
Mirror, abbe number 25.
7. fish eye lens according to any one of claims 1 to 6, which is characterized in that first lens are refractive index
1.55 glass lens, abbe number 72.
8. fish eye lens according to claim 7, which is characterized in that second lens are that 1.80 glass of refractive index is saturating
Mirror, abbe number 45.
9. fish eye lens according to claim 8, which is characterized in that the third piece lens are that 1.82 glass of refractive index is saturating
Mirror, abbe number 34.
10. fish eye lens according to claim 9, which is characterized in that the 9th lens are 1.75 glass of refractive index
Lens, abbe number 55.
11. fish eye lens according to claim 10, which is characterized 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 |
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| Publication Number | Publication Date |
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| CN106646837A CN106646837A (en) | 2017-05-10 |
| CN106646837B true CN106646837B (en) | 2019-01-29 |
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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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW484019B (en) * | 1998-12-11 | 2002-04-21 | Minolta Co Ltd | A taking lens system |
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2017
- 2017-03-21 CN CN201710167949.4A patent/CN106646837B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN106646837A (en) | 2017-05-10 |
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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. |
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