CN108983396A - A kind of fish eye lens - Google Patents
A kind of fish eye lens Download PDFInfo
- Publication number
- CN108983396A CN108983396A CN201811026868.3A CN201811026868A CN108983396A CN 108983396 A CN108983396 A CN 108983396A CN 201811026868 A CN201811026868 A CN 201811026868A CN 108983396 A CN108983396 A CN 108983396A
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- China
- Prior art keywords
- lens
- fish eye
- focal length
- concave
- eye lens
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- 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
-
- 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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Fish eye lens of the present invention, the first lens including the convex-concave negative power being arranged successively from the object side to the image side, second lens of concave-concave negative power, the third lens of biconvex positive light coke, 4th lens of biconvex positive light coke, the 5th lens of concave-concave negative power, the 6th lens of biconvex positive light coke, wherein the one the second lens are glass lens, and the 3rd the 5th the 6th lens are plastic aspheric lens.By reasonable distribution focal power, visual field of the present invention is up to ultra-wide angle, it is seen that with it is infrared confocal, and realize 4K be imaged, meanwhile, under -40~85 DEG C of high and low temperature environments, resolving power is remained unchanged.
Description
Technical field
The invention belongs to lens technology field more particularly to a kind of fish eye lenses.
Background technique
With the development of protection and monitor field, high definition fish eye lens can be seen everywhere.It, can be full after even 4K concept proposes
The fish eye lens of sufficient 4K demand also comes into being.But traditional fish eye lens, in order to reach the effect of visible and infrared all high definitions
Fruit can all use more pieces of eyeglasses, in order to reach high/low temperature not defocus, all do not use plastic lens substantially.Not only structure bulky, and
And higher cost.The present invention guarantees 4K image quality under the premise of reducing cost, and field angle reaches ultra-wide angle, not only infrared
Not defocus, while under -40~85 DEG C of high and low temperature environments, resolving power remains unchanged.
Summary of the invention
The purpose of the present invention is to provide a kind of fish eye lens, first including setting gradually along light incident direction is saturating
Mirror, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens, form entire optical system；Described first thoroughly
Mirror, second lens are glass lens, and the third lens, the 5th lens and the 6th lens are plastic aspherical element
Lens；First lens are convex-concave negative power, and second lens are concave-concave negative power, and the third lens are biconvex
Positive light coke, the 4th lens are biconvex positive light coke, and the 5th lens are concave-concave negative power, and the 6th lens are
Biconvex positive light coke.
Preferably, the focal length of first lens is f1, the focal length of the entire optical system is f, meets: 2.5 < | f1/f
|<6.5。
Preferably, the refractive index of first lens and Abbe number are respectively n1And v1, meet: 0.01 < n1/v1<0.05。
Preferably, the focal length of first lens is f1, the focal length of second lens is f2, meet: 1.5 < | f1/f2|<
3.5。
Preferably, the focal length of the third lens is f3, the focal length of the entire optical system is f, is met: 3 < f3/f|<
5。
Preferably, the focal length of the 5th lens is f5, the focal length of the 6th lens is f6, meet: -0.5 < | f5/f6|
<1.5。
Preferably, the fish-eye field angle FOV meets: 222o≤FOV≤252o.
Preferably, the 4th lens are glass lens or plastic aspheric lens.
Preferably, there is a diaphragm between the third lens and the 4th lens.
Preferably, the aspherical shape of the third lens, the 5th lens and the 6th lens is all satisfied equation:
In above formula, parameter c is curvature corresponding to radius, and y is radial coordinate (its unit is identical with length of lens unit),
K is circular cone whose conic coefficient, and as k < -1, face shape curve is hyperbola, is parabola when k=-1, and when -1 < k < 0 is ellipse
Circle is circle when k=0, is oblateness when k > 0, α indicates coefficient corresponding to each radial coordinate.
Preferably, each aspherical relevant parameter is listed in the table below:
。
Preferably, the focal length and refractive index of first lens to the 6th lens meet the following conditions:
| -10≤f1≤-6 | 1.6≤n1≤1.8 |
| -6≤f2≤2 | 1.6≤n1≤1.8 |
| -5≤f3≤8 | 1.5≤n3≤1.7 |
| 4≤f4≤7 | 1.5≤n3≤1.7 |
| -6≤f5≤-3 | 1.5≤n5≤1.7 |
| 2≤f6≤6 | 1.5≤n5≤1.7 |
Preferably, the field angle FOV of the camera lens meets: 222o≤FOV≤252o
The camera lens moulds mixed structure using glass, under the premise of overcoming the wasting of resources, realizes 4K imaging, field angle is up to super wide
Angle, not only it is visible with it is infrared confocal, while being still able to maintain its excellent performance under -40 DEG C~85 DEG C of high and low temperature environment.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is index path of the invention.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.It is understood that
It is that specific embodiment described herein is used only for explaining the present invention rather than limiting the invention.It further needs exist for illustrating
, for ease of description, only some but not all contents related to the present invention are shown in the drawings.
As depicted in figs. 1 and 2, the present invention includes the first lens L1, the second lens set gradually along light incident direction
L2, the third lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6；
Fish eye lens as described above, first lens, second lens be glass lens, the third lens,
5th lens and the 6th lens are plastic aspheric lens.
The aspherical shape of fish eye lens as described above, the third lens, the 5th lens and the 6th lens is all satisfied
Equation:
In above formula, parameter c is curvature corresponding to radius, and y is radial coordinate (its unit is identical with length of lens unit),
K is circular cone whose conic coefficient, and as k < -1, face shape curve is hyperbola, is parabola when k=-1, and when -1 < k < 0 is ellipse
Circle is circle when k=0, is oblateness when k > 0, α indicates coefficient corresponding to each radial coordinate, accurately set by the above parameter
The face molded dimension of both-sided aspherical, aspherical relevant parameter are listed in the table below before and after fix-focus lens:
A kind of fish eye lens as described above, first lens are convex-concave negative power, and second lens are concave-concave
Negative power, the third lens are biconvex positive light coke, and the 4th lens are biconvex positive light coke, and the 5th lens are
Concave-concave negative power, the 6th lens are biconvex positive light coke.
A kind of fish eye lens as described above, the focal length of first lens and the focal length of entire optical system meet: 2.5
<|f1/f|<6.5。
A kind of fish eye lens as described above, the refractive index and Abbe number of first lens meet: 0.01 < n1/v1<
0.05。
The focal length of a kind of fish eye lens as described above, the focal length of first lens and second lens meets: 1.5
<|f1/f2|<3.5。
The focal length of a kind of fish eye lens as described above, the focal length of the third lens and entire optical system meets: 3 < |
f1/f|<5。
A kind of fish eye lens as described above, the focal length of the 5th lens and the focal length of the 6th lens meet: -0.5 < |
f5/f6|<1.5。
A kind of fish eye lens as described above, the focal length and refractive index of first lens to the 6th lens meet with
Lower condition:
| -10≤f1≤-6 | 1.6≤n1≤1.8 |
| -6≤f2≤2 | 1.6≤n2≤1.8 |
| -5≤f3≤8 | 1.5≤n3≤1.7 |
| 4≤f4≤7 | 1.5≤n4≤1.7 |
| -6≤f5≤-3 | 1.5≤n5≤1.7 |
| 2≤f6≤6 | 1.5≤n6≤1.7 |
The field angle FOV of a kind of fish eye lens as described above, the camera lens meets: 222o≤FOV≤252o.
A kind of fish eye lens as described above, the 4th lens are glass lens or plastic aspheric lens.
A kind of fish eye lens as described above, has a diaphragm between the third lens and the 4th lens.
As shown in Fig. 2, it was verified that the present invention makes structure more under the premise of reducing cost using glass modeling mixed structure
It is light, it ensure that 4K image quality, especially field angle reach ultra-wide angle, not only infrared not defocus, in -40 DEG C~85 DEG C of high/low temperature
Camera lens does not run coke under environment, and performance still keeps excellent.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of fish eye lens, it is characterised in that: including set gradually along light incident direction the first lens, the second lens,
The third lens, the 4th lens, the 5th lens and the 6th lens, form entire optical system；
First lens, second lens are glass lens, and the third lens, the 5th lens and the described 6th are thoroughly
Mirror is plastic aspheric lens；
First lens are convex-concave negative power, and second lens are concave-concave negative power, and the third lens are biconvex
Positive light coke, the 4th lens are biconvex positive light coke, and the 5th lens are concave-concave negative power, and the 6th lens are
Biconvex positive light coke.
2. a kind of fish eye lens according to claim 1, which is characterized in that the focal length of first lens is f1, described whole
The focal length of a optical system is f, is met: 2.5 < | f1/f|<6.5。
3. a kind of fish eye lens according to claim 2, which is characterized in that the refractive index and Abbe number of first lens
Respectively n1And v1, meet: 0.01 < n1/v1<0.05。
4. a kind of fish eye lens according to claim 2, which is characterized in that the focal length of first lens is f1, described
The focal length of two lens is f2, meet: 1.5 < | f1/f2|<3.5。
5. a kind of fish eye lens according to claim 1, which is characterized in that the focal length of the third lens is f3, described whole
The focal length of a optical system is f, is met: 3 < | f3/f|<5。
6. a kind of fish eye lens according to claim 1, which is characterized in that the focal length of the 5th lens is f5, described
The focal length of six lens is f6, meet: -0.5 < | f5/f6|<1.5。
7. a kind of fish eye lens according to claim 1, which is characterized in that the fish-eye field angle FOV meets:
222°≤FOV≤252°。
8. a kind of fish eye lens according to claim 1, which is characterized in that the 4th lens are glass lens or plastics
Non-spherical lens.
9. a kind of fish eye lens according to claim 1, which is characterized in that have between the third lens and the 4th lens
One diaphragm.
10. a kind of fish eye lens according to claim 1, which is characterized in that the third lens, the 5th lens and the 6th
The aspherical shape of lens is all satisfied equation:
In above formula, parameter c is curvature corresponding to radius, and y is radial coordinate (its unit is identical with length of lens unit), and k is
Circular cone whose conic coefficient, as k < -1, face shape curve is hyperbola, is parabola when k=-1, is ellipse, k when -1 < k < 0
It is circle when=0, is oblateness when k > 0, α indicates coefficient corresponding to each radial coordinate.
11. a kind of fish eye lens according to claim 10, which is characterized in that each aspherical relevant parameter is listed in the table below:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026868.3A CN108983396A (en) | 2018-09-04 | 2018-09-04 | A kind of fish eye lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026868.3A CN108983396A (en) | 2018-09-04 | 2018-09-04 | A kind of fish eye lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108983396A true CN108983396A (en) | 2018-12-11 |
Family
ID=64544593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811026868.3A Pending CN108983396A (en) | 2018-09-04 | 2018-09-04 | A kind of fish eye lens |
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| CN (1) | CN108983396A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111352214A (en) * | 2018-12-24 | 2020-06-30 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN112305718A (en) * | 2020-11-27 | 2021-02-02 | 东莞市宇瞳光学科技股份有限公司 | Fixed focus lens |
| CN113960752A (en) * | 2021-10-13 | 2022-01-21 | 江西凤凰光学科技有限公司 | Small-distortion high-resolution fisheye lens |
| CN115220186A (en) * | 2022-07-14 | 2022-10-21 | 福建福光天瞳光学有限公司 | Glass-plastic mixed panoramic optical system and imaging method thereof |
| TWI808581B (en) * | 2021-12-27 | 2023-07-11 | 大陸商信泰光學（深圳）有限公司 | Lens assembly |
-
2018
- 2018-09-04 CN CN201811026868.3A patent/CN108983396A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111352214A (en) * | 2018-12-24 | 2020-06-30 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN111352214B (en) * | 2018-12-24 | 2021-07-30 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN112305718A (en) * | 2020-11-27 | 2021-02-02 | 东莞市宇瞳光学科技股份有限公司 | Fixed focus lens |
| CN113960752A (en) * | 2021-10-13 | 2022-01-21 | 江西凤凰光学科技有限公司 | Small-distortion high-resolution fisheye lens |
| TWI808581B (en) * | 2021-12-27 | 2023-07-11 | 大陸商信泰光學（深圳）有限公司 | Lens assembly |
| CN115220186A (en) * | 2022-07-14 | 2022-10-21 | 福建福光天瞳光学有限公司 | Glass-plastic mixed panoramic optical system and imaging method thereof |
| CN115220186B (en) * | 2022-07-14 | 2024-01-12 | 福建福光天瞳光学有限公司 | Glass-plastic mixed look-around optical system and imaging method thereof |
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