CN107065144A - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
- Publication number
- CN107065144A CN107065144A CN201710476109.6A CN201710476109A CN107065144A CN 107065144 A CN107065144 A CN 107065144A CN 201710476109 A CN201710476109 A CN 201710476109A CN 107065144 A CN107065144 A CN 107065144A
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- Prior art keywords
- lens
- wide
- sphere
- aspherical
- angle
- Prior art date
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Classifications
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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
-
- 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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- 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
Abstract
The invention discloses a kind of wide-angle lens, it is sequentially coaxially arranged with the first lens, the second lens, the 3rd lens, diaphragm, the 4th lens, the 5th lens and optical filter from object space to image space；First lens are spherical mirror, and the first power of lens is negative；Second lens are aspherical mirror, and the second power of lens is negative；3rd lens are spherical mirror, and the 3rd power of lens is just；4th lens are aspherical mirror, and the 4th power of lens is just；5th lens are spherical mirror, and the 5th power of lens is negative；Optical filter includes the first platen surface and the second platen surface being oppositely arranged.Wide-angle lens proposed by the present invention significantly reduces the F numbers of wide-angle lens by appropriate optimization structure, improves the brightness of image and image quality of panoramic video captured by wide-angle lens；Also, the present invention is by using glass and plastics combination of different materials structure, reduces the weight of wide-angle lens itself and optimize the monovalent cost of wide-angle lens.
Description
Technical field
The present invention relates to a kind of wide-angle lens.
Background technology
Panoramic video is supplied to user to carry out the interaction and operation of correlation by head-mounted display by optical system, is brought
People's visual experience on the spot in person, the technology has been widely used for the fields such as amusement, medical treatment, education.With virtual existing
The fast development of real technology is, it is necessary to which increasing high-quality panoramic video does the substantial in content of correlation.Therefore, for clapping
The portable panoramic camera of video of panning obtains increasing concern.Currently, the visual angle of panoramic camera is more than 180
The F numbers (focal length of camera lens and the ratio of clear aperature) of the wide-angle lens of degree are mostly more than 2.4, and the brightness of image is relatively low, and
Mostly full glass lens, the cost of manufacture is higher.
The content of the invention
The technical problem to be solved in the present invention is to cause figure to overcome the F numbers of wide-angle lens of the prior art larger
There is provided a kind of wide-angle lens for the relatively low defect of the brightness of picture.
The present invention is to solve above-mentioned technical problem by following technical proposals：
A kind of wide-angle lens, its feature is that the wide-angle lens is sequentially coaxially arranged with from object space to image space：
One first lens, first lens are spherical mirror, and first power of lens is negative, first lens
Including the first sphere and the second sphere；
One second lens, second lens are aspherical mirror, and second power of lens is negative, and described second is saturating
It is aspherical and second aspherical that mirror includes first；
One the 3rd lens, the 3rd lens are spherical mirror, and the 3rd power of lens is just the 3rd lens
Including the 3rd sphere and the 4th sphere；
One diaphragm；
One the 4th lens, the 4th lens are aspherical mirror, and the 4th power of lens is just, the described 4th is saturating
Mirror includes the 3rd aspherical and the 5th sphere；
One the 5th lens, the 5th lens are spherical mirror, and the 5th power of lens is negative, the 5th lens
It is aspherical including the 6th sphere and the 4th；
One optical filter, the optical filter includes the first platen surface and the second platen surface being oppositely arranged；
Wherein, first sphere, second sphere, it is described first aspherical, described second the aspherical, described 3rd
Sphere, the 4th sphere, the diaphragm, the described 3rd aspherical, described 5th sphere, the 6th sphere, the described 4th
Aspherical, described first platen surface and second platen surface are sequentially coaxially arranged from object space to image space.
It is preferred that first lens, the material of the 3rd lens are glass；Second lens, the described 4th
The material of lens and the 5th lens is plastics.
It is preferred that the refractive index of second lens and the 4th lens is 1.43~1.63, Abbe number is 50
~60.
It is preferred that the refractive index of first lens is 1.62~1.82, Abbe number is 45~55；3rd lens
Refractive index is 1.74~1.94, and Abbe number is 18~28；The refractive index of 5th lens is 1.53~1.73, and Abbe number is 18
~28.
It is preferred that the refractive index of the optical filter is 1.41~1.61, Abbe number is 59~69.
It is preferred that first lens focal length and the wide-angle lens focal length ratio absolute value for 2.31~
4.5；
The absolute value of the ratio of the focal length of second lens and the focal length of the wide-angle lens is 3.68~5.12；
The absolute value of the ratio of the focal length of 3rd lens and the focal length of the wide-angle lens is 5.52~7.38；
The absolute value of the ratio of the focal length of 4th lens and the focal length of the wide-angle lens is 3.35~6.27；
The absolute value of the ratio of the focal length of 5th lens and the focal length of the wide-angle lens is 18.26~21.3.
It is preferred that the 4th lens are glued with the 5th lens, wherein, the 5th sphere of the 4th lens and institute
The 6th sphere for stating the 5th lens is glued, and the 5th sphere is identical with the 6th sphere curvature radius.
It is preferred that the radius of curvature of first sphere is 28.33mm, thickness is 0.97mm；
The radius of curvature of second sphere is 3.6mm, and thickness is 3.28mm；
Described first aspherical radius of curvature is -15.922mm, and thickness is 0.91mm；
Described second aspherical radius of curvature is 4.34mm, and thickness is 2.49mm；
The radius of curvature of 3rd sphere is -65.69mm, and thickness is 2.38mm；
The radius of curvature of 4th sphere is -7.49mm, and thickness is 5.25mm；
The radius of curvature of the diaphragm is ∞, and thickness is 0.05mm；
The 3rd aspherical radius of curvature is 2.63mm, and thickness is 1.51mm；
The radius of curvature of 5th sphere is -2.26mm, and thickness is 1.96mm；
The radius of curvature of 6th sphere is -2.26mm, and thickness is 1.96mm；
The 4th aspherical radius of curvature is -8.11mm, and thickness is 1.88mm；
The radius of curvature of first platen surface is ∞, and thickness is 0.4mm；
The radius of curvature of second platen surface is ∞, and thickness is 1.29mm.
It is preferred that the F numbers of the wide-angle lens are 2, the angle of visual field is 185 degree.
It is preferred that second lens, the 4th lens and the 5th lens are even aspheric surface mirror；
4th lens the 3rd it is aspherical be even aspheric surface, the 5th lens the 4th it is aspherical for even it is non-
Sphere.
The positive effect of the present invention is：
Wide-angle lens proposed by the present invention significantly reduces the F numbers of wide-angle lens by appropriate optimization structure, improves
The brightness of image and image quality of panoramic video captured by wide-angle lens；Also, the present invention by using glass and plastics not
With the combining structure of material, reduce the weight of wide-angle lens itself and optimize the monovalent cost of wide-angle lens.
Brief description of the drawings
Fig. 1 is the structural representation of the wide-angle lens of present pre-ferred embodiments.
Fig. 2 is the index path of the wide-angle lens of present pre-ferred embodiments.
Fig. 3 is the optical distortion curve map of the wide-angle lens of present pre-ferred embodiments.
Fig. 4 is the curvature of field figure of the wide-angle lens of present pre-ferred embodiments.
Fig. 5 is the MTF curve figure of the wide-angle lens of present pre-ferred embodiments.
Fig. 6 is the relative illumination curve map of the wide-angle lens of present pre-ferred embodiments.
Description of reference numerals
First lens 10
First sphere 11
Second sphere 12
Second lens 20
First aspherical 21
Second aspherical 22
3rd lens 30
3rd sphere 31
4th sphere 32
4th lens 40
3rd aspherical 41
5th sphere 42
5th lens 50
6th sphere 51
4th aspherical 52
Diaphragm 60
Mating plate 70
First platen surface 71
Second platen surface 72
Direction X
Image planes 80
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Apply among a scope.
Understood incorporated by reference to Fig. 1 and Fig. 2, the implementation case provides a kind of wide-angle lens, the wide-angle lens is along direction X
The first lens 10, the second lens 20, the 3rd lens 30, diaphragm are sequentially coaxially arranged with from object space to image space (namely image planes 80)
60th, the 4th lens 40, the 5th lens 50 and optical filter 70.First lens 10, the material of the 3rd lens 30 are glass；The
The material of two lens 20, the 4th lens 40 and the 5th lens 50 is plastics.
First lens 10 are spherical mirror, and the focal power of the first lens 10 is negative, and the first lens 10 include the He of the first sphere 11
Second sphere 12.Second lens 20 are aspherical mirror, and the focal power of the second lens 20 is negative, and the second lens 20 include the first aspheric
Face 21 and second aspherical 22.3rd lens 30 are spherical mirror, and the focal powers of the 3rd lens 30 is just, and the 3rd lens 30 include the
Three spheres 31 and the 4th sphere 32.4th lens 40 are aspherical mirror, and the focal power of the 4th lens 40 is just, the 4th lens 40 wraps
Include the the 3rd aspherical 41 and the 5th sphere 42.5th lens 50 are spherical mirror, and the focal power of the 5th lens 50 is negative, the 5th lens
50 include the 6th sphere 51 and the 4th aspherical 52.Optical filter 70 includes the first platen surface 71 and the second platen surface being oppositely arranged
72.First sphere 11, the second sphere 12, first aspherical 21, second aspherical 22, the 3rd sphere 31, the 4th sphere 32, diaphragm
60th, the 3rd aspherical 41, the 5th sphere 42, the 6th sphere 51, the 4th aspherical 52, the first platen surface 71 and the second platen surface 72
Sequentially coaxially arranged from object space to image space.4th lens 40 and the 5th lens 50 are glued, wherein, the 5th sphere of the 4th lens 40
42 and the 5th lens 50 the 6th sphere 51 it is glued, and the 5th sphere 42 is identical with the radius of curvature of the 6th sphere 51.Second lens
20th, the 4th lens 40 and the 5th lens 50 are even aspheric surface mirror.The the 3rd aspherical 41 of 4th lens 40 is even aspheric
Face, the 4th aspherical 52 of the 5th lens 50 be even aspheric surface.
In the present embodiment, the refractive index of the second lens 20 and the 4th lens 40 is 1.43~1.63, and Abbe number is
50~60.It is preferred that the refractive index of the second lens 20 and the 4th lens 40 is 1.53, Abbe number is 55.74.First lens
10 refractive index is 1.62~1.82, and Abbe number is 45~55；The refractive index of 3rd lens 30 is 1.74~1.94, and Abbe number is
18~28；The refractive index of 5th lens 50 is 1.53~1.73, and Abbe number is 18~28.It is preferred that the refraction of the first lens 10
Rate is 1.72, and Abbe number is 50.35；The refractive index of 3rd lens 30 is 1.84, and Abbe number is 23.78；The folding of 5th lens 50
It is 1.63 to penetrate rate, and Abbe number is 23.97.The refractive index of optical filter 70 is 1.41~1.61, and Abbe number is 59~69.It is preferred that
The refractive index of optical filter 70 is 1.516, and Abbe number is 64.1.
In the present embodiment, the absolute value of the ratio of the focal length of the focal length of the first lens 10 and the wide-angle lens is 2.31
~4.5；The absolute value of the ratio of the focal length of second lens 20 and the focal length of the wide-angle lens is 3.68~5.12；3rd lens
The absolute value of the ratio of the focal length of 30 focal length and the wide-angle lens is 5.52~7.38；The focal length of 4th lens 40 and described
The absolute value of the ratio of the focal length of wide-angle lens is 3.35~6.27；The focal length of 5th lens 50 and the focal length of the wide-angle lens
Ratio absolute value be 18.26~21.3.
In the present embodiment, the radius of curvature of the first sphere 11 is 28.33mm, and thickness is 0.97mm.Second sphere 12
Radius of curvature is 3.6mm, and thickness is 3.28mm.First aspherical 21 radius of curvature is -15.922mm, and thickness is 0.91mm.
Second aspherical 22 radius of curvature is 4.34mm, and thickness is 2.49mm.The radius of curvature of 3rd sphere 31 is -65.69mm, thick
Spend for 2.38mm.The radius of curvature of 4th sphere 32 is -7.49mm, and thickness is 5.25mm.The radius of curvature of diaphragm 60 is ∞, thick
Spend for 0.05mm.3rd aspherical 41 radius of curvature is 2.63mm, and thickness is 1.51mm.The radius of curvature of 5th sphere 42
For -2.26mm, thickness is 1.96mm.The radius of curvature of 6th sphere 51 is -2.26mm, and thickness is 1.96mm.4th is aspherical
52 radius of curvature is -8.11mm, and thickness is 1.88mm.The radius of curvature of first platen surface 71 is ∞, and thickness is 0.4mm.The
The radius of curvature of two platen surfaces 72 is ∞, and thickness is 1.29mm.Shown in chart specific as follows：
Wherein, the aspherical face type formula of the wide-angle lens is：
In formula above, z be it is aspherical optical axis direction height be r when, apart from aspheric vertex of surface apart from rise,
C is the curvature in eyeglass face, and k is circular cone coefficient, and A, B, C, D, E, F, G, H are order aspherical coefficients, in the present embodiment, coefficient
Get A, B, C, D, E, F.Following table is each aspherical parameter list：
| First is aspherical | Second is aspherical | 3rd is aspherical | 4th is aspherical | |
| k | 5.378 | 0 | -0.13474 | -11.357 |
| A | 0 | 0 | 0 | 0 |
| B | 0.00229 | 0.00184 | -0.00186 | 0.01149 |
| C | -0.04719 | -0.05521 | -0.82561 | -1.33982 |
| D | 0.05531 | 0.01524 | 0.29814 | 0.84335 |
| E | - | 0.23815 | - | -0.40918 |
| F | - | -0.32638 | - | 0.011235 |
In the present embodiment, by above-mentioned setting, it is the 2, angle of visual field of wide-angle lens to realize the F numbers of the wide-angle lens
For 185 degree, large aperture wide-angle image is reached.TTL (the lens planes above camera lens light hole to chip of the wide-angle lens
The distance of sensitized lithography) it is 22.4mm, focal length is 1.36mm, and eyeglass maximum gauge is 15mm.
Fig. 3 is the optical distortion curve map of the wide-angle lens of the present embodiment, and Fig. 4 is the curvature of field of the wide-angle lens of the present embodiment
Figure, it can be seen that the curvature of field absolute value of the wide-angle lens is in 0.08mm, and distortion curve is more smooth, the figure of edge wide-angle region
It is more gentle as compressing, effectively increase the definition of unfolded image.
Fig. 5 is MTF curve figure (the MTF English full name of the wide-angle lens of the present embodiment：Modulation Transfer
Function, modulation transfer function), from curve, the meridian of each visual field and the MTF curve of the sagitta of arc relatively, show
The imaging consistency in meridian (T) and the sagitta of arc (S) both direction of the wide-angle lens is relatively good, and the MTF contrasts of full filed
Degree has reached 0.3, and the image contrast of the wide-angle lens is preferable.
Fig. 6 is the relative illumination curve map of the wide-angle lens of the present embodiment, and the wide-angle lens is contrasted in full filed scope
Degree more than 0.7 and curve is more smooth, show picture that the wide-angle lens shoots whole visual field brightness of image relatively,
It is not in local dark situation.
Although the foregoing describing the embodiment of the present invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
On the premise of principle and essence from the present invention, various changes or modifications can be made to these embodiments, but these are changed
Protection scope of the present invention is each fallen within modification.
Claims (10)
1. a kind of wide-angle lens, it is characterised in that the wide-angle lens is sequentially coaxially arranged with from object space to image space：
One first lens, first lens are spherical mirror, and first power of lens is negative, and first lens include
First sphere and the second sphere；
One second lens, second lens are aspherical mirror, and second power of lens is negative, the second lens bag
Include first aspherical and second aspherical；
One the 3rd lens, the 3rd lens are spherical mirror, and the 3rd power of lens is just, the 3rd lens includes
3rd sphere and the 4th sphere；
One diaphragm；
One the 4th lens, the 4th lens are aspherical mirror, and the 4th power of lens is just the 4th lens bag
Include the 3rd aspherical and the 5th sphere；
One the 5th lens, the 5th lens are spherical mirror, and the 5th power of lens is negative, and the 5th lens include
6th sphere and the 4th aspherical；
One optical filter, the optical filter includes the first platen surface and the second platen surface being oppositely arranged；
Wherein, first sphere, second sphere, described first aspherical, the described second aspherical, described 3rd ball
It is face, the 4th sphere, the diaphragm, the described 3rd aspherical, described 5th sphere, the 6th sphere, the described 4th non-
Sphere, first platen surface and second platen surface are sequentially coaxially arranged from object space to image space.
2. wide-angle lens as claimed in claim 1, it is characterised in that first lens, the 3rd lens material it is equal
For glass；The material of second lens, the 4th lens and the 5th lens is plastics.
3. wide-angle lens as claimed in claim 2, it is characterised in that the refractive index of second lens and the 4th lens
It is 1.43~1.63, Abbe number is 50~60.
4. wide-angle lens as claimed in claim 2, it is characterised in that the refractive index of first lens is 1.62~1.82,
Abbe number is 45~55；The refractive index of 3rd lens is 1.74~1.94, and Abbe number is 18~28；5th lens
Refractive index is 1.53~1.73, and Abbe number is 18~28.
5. wide-angle lens as claimed in claim 1, it is characterised in that the refractive index of the optical filter is 1.41~1.61, Ah
Shellfish number is 59~69.
6. wide-angle lens as claimed in claim 1, it is characterised in that
The absolute value of the ratio of the focal length of first lens and the focal length of the wide-angle lens is 2.31~4.5；
The absolute value of the ratio of the focal length of second lens and the focal length of the wide-angle lens is 3.68~5.12；
The absolute value of the ratio of the focal length of 3rd lens and the focal length of the wide-angle lens is 5.52~7.38；
The absolute value of the ratio of the focal length of 4th lens and the focal length of the wide-angle lens is 3.35~6.27；
The absolute value of the ratio of the focal length of 5th lens and the focal length of the wide-angle lens is 18.26~21.3.
7. wide-angle lens as claimed in claim 1, it is characterised in that the 4th lens are glued with the 5th lens, its
In, the 6th sphere of the 5th sphere of the 4th lens and the 5th lens is glued, and the 5th sphere and described the
Six sphere curvature radius are identical.
8. wide-angle lens as claimed in claim 1, it is characterised in that
The radius of curvature of first sphere is 28.33mm, and thickness is 0.97mm；
The radius of curvature of second sphere is 3.6mm, and thickness is 3.28mm；
Described first aspherical radius of curvature is -15.922mm, and thickness is 0.91mm；
Described second aspherical radius of curvature is 4.34mm, and thickness is 2.49mm；
The radius of curvature of 3rd sphere is -65.69mm, and thickness is 2.38mm；
The radius of curvature of 4th sphere is -7.49mm, and thickness is 5.25mm；
The radius of curvature of the diaphragm is ∞, and thickness is 0.05mm；
The 3rd aspherical radius of curvature is 2.63mm, and thickness is 1.51mm；
The radius of curvature of 5th sphere is -2.26mm, and thickness is 1.96mm；
The radius of curvature of 6th sphere is -2.26mm, and thickness is 1.96mm；
The 4th aspherical radius of curvature is -8.11mm, and thickness is 1.88mm；
The radius of curvature of first platen surface is ∞, and thickness is 0.4mm；
The radius of curvature of second platen surface is ∞, and thickness is 1.29mm.
9. wide-angle lens as claimed in claim 1, it is characterised in that the F numbers of the wide-angle lens are 2, and the angle of visual field is 185
Degree.
10. the wide-angle lens as described in any one in claim 1-9, it is characterised in that second lens, the described 4th
Lens and the 5th lens are even aspheric surface mirror；
4th lens the 3rd it is aspherical be even aspheric surface, the 5th lens the 4th it is aspherical be even aspheric
Face.
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|---|---|---|---|
| CN201710476109.6A CN107065144B (en) | 2017-06-21 | 2017-06-21 | Wide-angle lens |
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| CN109782416A (en) * | 2017-11-15 | 2019-05-21 | 大立光电股份有限公司 | Optical image-taking microscope group, image-taking device and electronic device |
| CN111323890A (en) * | 2018-12-13 | 2020-06-23 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus including the same |
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| CN111323890B (en) * | 2018-12-13 | 2021-10-26 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus including the same |
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| Publication number | Publication date |
|---|---|
| CN107065144B (en) | 2023-04-14 |
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Address after: Building 1, No. 399 Keyuan Road, Zhangjiang hi tech park, Pudong New Area, Shanghai, 201203 Applicant after: Huaqin Technology Co.,Ltd. Address before: Building 1, No. 399 Keyuan Road, Zhangjiang hi tech park, Pudong New Area, Shanghai, 201203 Applicant before: Huaqin Technology Co.,Ltd. Address after: Building 1, No. 399 Keyuan Road, Zhangjiang hi tech park, Pudong New Area, Shanghai, 201203 Applicant after: Huaqin Technology Co.,Ltd. Address before: 201203 Building 1, 399 Zhangyuan Road, Zhangjiang, Pudong New Area, Shanghai Applicant before: HUAQIN TELECOM TECHNOLOGY Co.,Ltd. |
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