CN107193111A - High pixel fish eye optical systems and its camera module of application - Google Patents
High pixel fish eye optical systems and its camera module of application Download PDFInfo
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- CN107193111A CN107193111A CN201710605653.6A CN201710605653A CN107193111A CN 107193111 A CN107193111 A CN 107193111A CN 201710605653 A CN201710605653 A CN 201710605653A CN 107193111 A CN107193111 A CN 107193111A
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- lens
- convex surface
- fish eye
- object plane
- image planes
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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
- G02B13/001—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
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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
- 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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Abstract
The embodiment of the invention discloses high pixel fish eye optical systems, it is sequentially provided with along optical axis from object plane to image planes：First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens；First lens, the object plane side of the second lens are convex surface, and image planes side is concave surface, and its focal power is negative；The object plane side of 3rd lens is concave surface, and image planes side is convex surface, and its focal power is negative；The object plane side of 4th lens, the 5th lens and the 7th lens is convex surface, and image planes side is convex surface, and its focal power is just；5th lens and the 6th lens are mutually glued to form compound lens, and the focal length f56 of compound lens meets following condition：0.08<f/f56<0.17, f is the focal length of whole optical system.On the other hand, the embodiment of the present invention additionally provides a kind of camera module.The embodiment of the present invention, simple in construction, small volume；With superperformances such as large aperture, big visual angle, more than 16,000,000 high pixels.
Description
Technical field：
The present invention relates to a kind of optical system and its camera module of application, especially a kind of high pixel fish eye optical systems
And its camera module of application.
Background technology：
, there is complicated, volume in the existing fish eye optical systems or camera lens for being applied to panorama VR cameras or monitoring field
The not high enough defect of larger, pixel.
The content of the invention：
To overcome the problem of existing fish eye optical systems or camera lens have complicated, on the one hand the embodiment of the present invention provides
A kind of high pixel fish eye optical systems.
High pixel fish eye optical systems, are sequentially provided with along optical axis from object plane to image planes：First lens, the second lens, the 3rd
Lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens；
The object plane side of first lens is convex surface, and image planes side is concave surface, and its focal power is negative；
The object plane side of second lens is convex surface, and image planes side is concave surface, and its focal power is negative；
The object plane side of 3rd lens is concave surface, and image planes side is convex surface, and its focal power is negative；
The object plane side of 4th lens is convex surface, and image planes side is convex surface, and its focal power is just；
The object plane side of 5th lens is convex surface, and image planes side is convex surface, and its focal power is just；
The object plane side of 7th lens is convex surface, and image planes side is convex surface, and its focal power is just；
Wherein, the 5th lens and the 6th lens are mutually glued forms compound lens, and the focal length f56 of compound lens meets as follows
Condition：0.08<f/f56<0.17, f is the focal length of whole optical system.
On the other hand, the embodiment of the present invention additionally provides a kind of camera module.
Camera module, at least including optical lens, is provided with high pixel fish eye optical system described above in optical lens
System.
The embodiment of the present invention, is mainly made up of 7 pieces of lens, and lens piece number is reasonable, simple in construction, small volume；Using difference
Lens are mutually combined and reasonable distribution focal power, with superperformances such as large aperture, big visual angle, more than 16,000,000 high pixels.It is suitable
For panorama VR cameras and 360 ° without dead angle monitoring field.
Brief description of the drawings：
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the optical system of the embodiment of the present invention or the structural representation of camera module；
Fig. 2 is the optical system of the embodiment of the present invention or the curvature of field, the distortion curve figure of camera module；
Fig. 3 is the optical system of the embodiment of the present invention or the chromaticity difference diagram of camera module；
Fig. 4 is the optical system of the embodiment of the present invention or the MTF transfer curve figures of camera module；
Fig. 5 is the optical system of the embodiment of the present invention or the relative illumination figure of camera module.
Embodiment：
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with
Drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, the high pixel fish eye optical systems of the present embodiment, are sequentially provided with along optical axis from object plane to image planes：The
One lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the 7th lens 7.
The object plane side of first lens 1 is convex surface, and image planes side is concave surface, and its focal power is negative；
The object plane side of second lens 2 is convex surface, and image planes side is concave surface, and its focal power is negative；
The object plane side of 3rd lens 3 is concave surface, and image planes side is convex surface, and its focal power is negative；
The object plane side of 4th lens 4 is convex surface, and image planes side is convex surface, and its focal power is just；
The object plane side of 5th lens 5 is convex surface, and image planes side is convex surface, and its focal power is just；
The object plane side of 7th lens 7 is convex surface, and image planes side is convex surface, and its focal power is just；
Wherein, the 5th lens 5 and the 6th lens 6 are mutually glued forms compound lens, and the focal length f56 of compound lens is met such as
Lower condition：0.08<f/f56<0.17, f is the focal length of whole optical system.
The embodiment of the present invention, is mainly made up of 7 pieces of lens, and lens piece number is reasonable, simple in construction, small volume；Using difference
Lens are mutually combined and reasonable distribution focal power, with superperformances such as large aperture, big visual angle, more than 16,000,000 high pixels.It is suitable
For panorama VR cameras and 360 ° without dead angle monitoring field.
Further, the optical system meets following condition：
(1)0.31<f/fⅠ<0.38；
(2)0.33<f/fⅡ<0.43；
Wherein, f I is the combined focal length of the first lens 1, the second lens 2, the 3rd lens 3 and the 4th lens 4, and f II is
The combined focal length of 5th lens 5, the 6th lens 6 and the 7th lens 7.It is mutually combined using different lens and reasonable distribution light focus
Degree, with superperformances such as large aperture, big visual angle, more than 16,000,000 high pixels.
Further, each lens of the optical system meet following condition：
(1)-0.21<f/f1<-0.11；
(2)-0.50<f/f2<-0.25；
(3)-0.13<f/f3<0；
(4)0.37<f/f4<0.49；
(5)0.19<f/f7<0.29；
Wherein, f1 is the focal length of the first lens 1, and f2 is the focal length of the second lens 2, and f3 is the focal length of the 3rd lens 3, and f4 is
The focal length of 4th lens 4, f7 is the focal length of the 7th lens 7.It is mutually combined and reasonable distribution focal power, is had by different lens
The superperformances such as large aperture, big visual angle, more than 16,000,000 high pixels.
Yet further, second lens 2, the 4th lens 4 and the 7th lens 7 are non-spherical lens.It can carry
The parsing power of high optical lens, can effectively realize athermal, while reducing the difficulty of processing of camera lens.
Further, the Refractive Index of Material Nd1 of the first lens 1, material Abbe constant Vd1 are met：Nd1 ＜ 1.72, Vd1
＞ 52.It is simple in construction, it is ensured that good optical property.
Further, the Refractive Index of Material Nd2 of the second lens 2, material Abbe constant Vd2 are met：Nd2 ＜ 1.60, Vd2
＞ 61.It is simple in construction, it is ensured that good optical property.
Yet further, the Refractive Index of Material Nd3 of the 3rd lens 3, material Abbe constant Vd3 are met：Nd3 ＞ 1.88, Vd3
＜ 40.It is simple in construction, it is ensured that good optical property.
Further, the Refractive Index of Material Nd4 of the 4th lens 4, material Abbe constant Vd4 are met：Nd4 ＞ 1.75, Vd4
＜ 50.It is simple in construction, it is ensured that good optical property.
Further, the Refractive Index of Material Nd5 of the 5th lens 5, material Abbe constant Vd5 are met：Nd5 ＜ 1.71, Vd5
＞ 55；Refractive Index of Material Nd6, the material Abbe constant Vd6 of 6th lens 6 are met：Nd6 ＞ 2.0, Vd6 ＜ 20.It is simple in construction,
Good optical property can be ensured.
Yet further, the Refractive Index of Material Nd7 of the 7th lens 7, material Abbe constant Vd7 are met：Nd7 ＞ 1.85, Vd7
＜ 41.It is simple in construction, it is ensured that good optical property.
Further, the aperture diaphragm 8 of optical system is located between the 4th lens 4 and the 5th lens 5.For adjusting light beam
Intensity.
Further, the lens 7 of the first lens 1 to the 7th are glass lens.It is simple in construction, it is ensured that good light
Learn performance.
Further, bandpass filter is provided between the 7th lens 7 and image planes 9.It may filter that infrared in environment
Light, to avoid image from producing red aeration phenomenon.
Specifically, in the present embodiment, the focal length f of this optical system is 2.163mm, and stop index F No. are 2.4, depending on
ω=185 ° of rink corner 2 (Φ 6.29mm), optics overall length TTL=17mm.Every basic parameter of this optical system is as shown in the table：
In upper table, along optical axis from object plane to image planes, S1, S2 correspond to two surfaces of the first lens 1；S3, S4 are corresponded to
Two surfaces of the second lens 2；S5, S6 correspond to two surfaces of the 3rd lens 3；S7, S8 correspond to two of the 4th lens 4
Surface；STO is the position of diaphragm 8；S10, S11 correspond to two surfaces of the 5th lens 5；It is saturating that S11, S12 correspond to the 6th
Two surfaces of mirror 6；S13, S14 correspond to two surfaces of the 7th lens 7；S15, S16 correspond to be located at the 7th lens 7 and picture
Two surfaces of the bandpass filter between face 9.
More specifically, the surface of second lens 2, the 4th lens 4 and the 7th lens 7 is aspherical shape, it is expired
Sufficient below equation：
Wherein, the curvature corresponding to parameter c=1/R, as radius, y is radial coordinate, its unit and length of lens unit phase
Together, k is circular cone whose conic coefficient, a1To a8Coefficient corresponding to respectively each radial coordinate.The S3 tables of second lens 2
The S13 surfaces and S14 surfaces on face and S4 surfaces, the S7 surfaces of the 4th lens 4 and S8 surfaces and the 7th lens 7 it is aspherical
Correlation values are as shown in the table：
| K | α2 | α3 | α4 | α5 | α6 | |
| S3 | 2.244 | -3.8527E-04 | -2.2836E-04 | 6.3717E-06 | 1.4687E-07 | -9.5505E-09 |
| S4 | -0.448 | 6.6616E-03 | 1.1542E-03 | 4.6063E-04 | -5.8708E-05 | 7.5552E-07 |
| S7 | -0.232 | 3.3061E-03 | 3.7949E-04 | 2.2909E-05 | -3.0833E-05 | 1.5748E-05 |
| S8 | 0 | 6.1521E-03 | -3.7346E-04 | 3.2156E-05 | 1.9467E-04 | -1.5922E-05 |
| S13 | -4.842 | -1.3050E-03 | 2.2048E-04 | 1.1111E-05 | -4.5173E-06 | 1.5622E-07 |
| S14 | 105.824 | -3.9260E-04 | -2.2887E-04 | -3.8529E-06 | -8.6526E-07 | 5.5208E-08 |
As can be seen that the optical system in the present embodiment has large aperture, big visual angle, more than 16,000,000 in from Fig. 2 to Fig. 5
The superperformances such as high pixel.
Camera module, at least including optical lens, is provided with high pixel fish eye optical system described above in optical lens
System.
This optical system and its camera module of application, are realized using different lens combinations and reasonable distribution focal power
The superperformances such as large aperture, big visual angle, more than 16,000,000 high pixels.
It is to combine one or more embodiments that particular content is provided as described above, does not assert the specific reality of the present invention
Apply and be confined to these explanations.It is all approximate with method of the invention, structure etc., identical, or for present inventive concept under the premise of
Some technology deduction or replace are made, should all be considered as protection scope of the present invention.
Claims (10)
1. high pixel fish eye optical systems, are sequentially provided with along optical axis from object plane to image planes：It is first lens, the second lens, the 3rd saturating
Mirror, the 4th lens, the 5th lens, the 6th lens and the 7th lens；Characterized in that,
The object plane side of first lens is convex surface, and image planes side is concave surface, and its focal power is negative；
The object plane side of second lens is convex surface, and image planes side is concave surface, and its focal power is negative；
The object plane side of 3rd lens is concave surface, and image planes side is convex surface, and its focal power is negative；
The object plane side of 4th lens is convex surface, and image planes side is convex surface, and its focal power is just；
The object plane side of 5th lens is convex surface, and image planes side is convex surface, and its focal power is just；
The object plane side of 7th lens is convex surface, and image planes side is convex surface, and its focal power is just；
Wherein, the 5th lens and the 6th lens are mutually glued forms compound lens, and the focal length f56 of compound lens meets following bar
Part：0.08<f/f56<0.17, f is the focal length of whole optical system.
2. high pixel fish eye optical systems according to claim 1, it is characterised in that the optical system meets following bar
Part：
(1)0.31<f/fⅠ<0.38；
(2)0.33<f/fⅡ<0.43；
Wherein, f I is the combined focal length of the first lens, the second lens, the 3rd lens and the 4th lens, f II be the 5th lens,
The combined focal length of 6th lens and the 7th lens.
3. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that the optical system meets as follows
Condition：
(1)-0.21<f/f1<-0.11；
(2)-0.50<f/f2<-0.25；
(3)-0.13<f/f3<0；
(4)0.37<f/f4<0.49；
(5)0.19<f/f7<0.29；
Wherein, f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is the focal length of the 3rd lens, and f4 is the 4th saturating
The focal length of mirror, f7 is the focal length of the 7th lens.
4. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that second lens, the 4th saturating
Mirror and the 7th lens are non-spherical lens.
5. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that the material refraction of the first lens
Rate Nd1, material Abbe constant Vd1 are met：Nd1 ＜ 1.72, Vd1 ＞ 52.
6. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that the material refraction of the second lens
Rate Nd2, material Abbe constant Vd2 are met：Nd2 ＜ 1.60, Vd2 ＞ 61.
7. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that the material refraction of the 3rd lens
Rate Nd3, material Abbe constant Vd3 are met：Nd3 ＞ 1.88, Vd3 ＜ 40.
8. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that the material refraction of the 4th lens
Rate Nd4, material Abbe constant Vd4 are met：Nd4 ＞ 1.75, Vd4 ＜ 50.
9. high pixel fish eye optical systems according to claim 1 or 2, it is characterised in that the material refraction of the 5th lens
Rate Nd5, material Abbe constant Vd5 are met：Nd5 ＜ 1.71, Vd5 ＞ 55；Refractive Index of Material Nd6, the material Abbe of 6th lens
Constant Vd6 is met：Nd6 ＞ 2.0, Vd6 ＜ 20.
10. camera module, at least including optical lens, it is characterised in that any one of claim 1-9 is provided with optical lens
Described high pixel fish eye optical systems.
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| CN109991719A (en) * | 2019-03-18 | 2019-07-09 | 广东弘景光电科技股份有限公司 | High definition wide-angle day and night confocal optical system and its camera module of application |
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