CN208297811U - A kind of video conference optical imaging system - Google Patents
A kind of video conference optical imaging system Download PDFInfo
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- CN208297811U CN208297811U CN201820427906.5U CN201820427906U CN208297811U CN 208297811 U CN208297811 U CN 208297811U CN 201820427906 U CN201820427906 U CN 201820427906U CN 208297811 U CN208297811 U CN 208297811U
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Abstract
The utility model discloses a kind of video conference optical imaging systems, successively include by object plane to image planes: the first lens 1 are negative focal length lens, and object side is convex surface, and image side surface is concave surface；Second lens 2 are positive focal length lenses, and object side is convex surface, and image side surface is concave surface；The third lens 3 are positive focal length lenses, and object side image side surface is all convex surface；4th lens 4；5th lens 5；6th lens 6 are positive focal length lenses, are meniscus shaped lens, and object side is concave surface, and image side surface is convex surface；7th lens 7 are negative focal length lens, and object side surface and image interface are all aspherical, at least one points of inflexion of image interface.The utility model uses 7 eyeglasses, aspherical ball adding face and cemented doublet combination, and the height of the sensitive film is IMC, and the total focal length of optical lens is f, meets between IMC and f: 0.4<f/IMC<0.5, wherein IMC>17MM.Meet big picture imaging, realizes 21,000,000 high pixel imagings, imaging clearly.
Description
[technical field]
The utility model relates to a kind of video conference optical imaging systems.
[background technique]
Existing video conference camera lens on the market, sensor image planes size are largely 1/2.5inch or so, pixel
For size near 2,200,000 pixels, picture image quality is limited, can not show perfect high-resolution image quality.
Since there are the above problems, it is necessary to propose solution to it, the utility model is exactly in this context
It proposes.
[summary of the invention]
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of video
Meeting optical imaging system.The video conference optical imaging system, which realizes, meets the big picture imaging of 1 inch of sensor, realizes
21000000 high pixel imagings, imaging clearly.
Purpose of the utility model is realized as follows:
A kind of video conference optical imaging system successively includes by object plane to image planes:
First lens 1 are negative focal length lens, and object side is convex surface, and image side surface is concave surface；
Second lens 2 are positive focal length lenses, and object side is convex surface, and image side surface is concave surface；
The third lens 3 are positive focal length lenses, and object side image side surface is all convex surface；
4th lens 4；
5th lens 5；
6th lens 6 are positive focal length lenses, are meniscus shaped lens, and object side is concave surface, and image side surface is convex surface；
7th lens 7 are negative focal length lens, object side surface and image interface be all it is aspherical, image interface at least one
The point of inflexion；
And optical filter (8) and sensitive film (9)；
Wherein the caliber size of the first lens 1 is the lens of D1, D1 < 17MM, first 1 and the spacing of sensitive film 9 is TL, optics
The total focal length of camera lens is f, and the height of the sensitive film 9 is IMC；Meet between D1, TL, f: 0.15 < f/TL < 0.35,0.55 <
Meet between D1/TL<0.85, IMC and f: 0.4<f/IMC<0.5, wherein IMC>17MM.
A kind of video conference optical imaging system as described above, it is characterised in that the 4th lens 4 are positive focal length lenses,
It is convex surface towards the one side of object plane, and the side towards image planes is concave surface, is glass spherical surface.
A kind of video conference optical imaging system as described above, it is characterised in that the 5th lens 5 are negative focal length lens,
It is convex surface towards the side of object plane, is concave surface towards the side of image planes, is glass spherical surface.
A kind of video conference optical imaging system as described above, it is characterised in that the 7th lens 7 are that negative focal length is saturating
Mirror can be M type lens or meniscus shaped lens, and the one side towards object plane is convex surface, and the another side towards image planes is concave surface.
A kind of video conference optical imaging system as described above, it is characterised in that the first lens 1 are spherical lens or non-
Spherical lens.
A kind of video conference optical imaging system as described above, it is characterised in that the second lens 2 and the third lens 3 are
Non-spherical lens.
A kind of video conference optical imaging system as described above, it is characterised in that the 4th lens 4 and the 5th lens 5 are
Balsaming lens.
A kind of video conference optical imaging system as described above, it is characterised in that the first lens 1, the second lens the 2, the 6th
Lens 6, the 7th lens 7 are Glass aspheric or plastic cement aspherical lens.
A kind of video conference optical imaging system as described above, it is characterised in that optical system works condition is -20 °~
70°。
A kind of video conference optical imaging system as described above, it is characterised in that: the first lens 1, second
The aspherical surface shape of lens 2, the 6th lens 6 and the 7th lens 7 meets equation: In formula, parameter c is curvature corresponding to radius, and y is radial coordinate, unit and lens
Length unit is identical, and k is circular cone whose conic coefficient；When k coefficient is less than -1, the face shape curve of lens is hyperbola, works as k
When coefficient is equal to -1, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse
Circle, when k-factor is equal to 0, the face shape curve of lens is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；
α1To α8Respectively indicate coefficient corresponding to each radial coordinate.
The beneficial effects of the utility model are:
1, the utility model uses 7 eyeglasses, aspherical ball adding face and cemented doublet combination, the height of the sensitive film
For IMC, the total focal length of optical lens is f, is met between IMC and f: 0.4<f/IMC<0.5, wherein IMC>17MM.Meet big draw
21,000,000 high pixel imagings, imaging clearly are realized in width imaging.
2, the first lens described in the utility model are negative focal length lens, and the one side towards object plane is convex aspheric surface, court
It is that concave surface is aspherical to the another side of image planes, effectively collapses high angle scattered light, realizes that horizontal field of view angle is greater than 83 °, the face R2 has
Effect has neutralized the correction variable of other eyeglasses generation, meets the small distortion imaging requirements of screen meeting optical system, and optical distortion <-
5%, TV aberration control are in -2.1%~3.5% range.
3, the utility model can be all using glass lens, or use plastic cement aspherical lens, can be high in high/low temperature high temperature
It is used in wet working environment, realizes blur-free imaging of focusing under -20~70 ° of environment, realize high-resolution imaging requirements.
4, the large aperture of FNO < 2.0 of the utility model, it may be achieved high brightness imaging.
4, the uniform imaging effect of the picture of the utility model, periphery relative illumination meet > 40%.
5, the image lenses effective diameter D1 of first eyeglass of the utility model, wherein D1 meets D1 < 17MM, the first lens
Spacing with sensitive film is TL, TL < 30mm, effectively saving loading space.
6, aspherical lens can be used in the entire optical texture of the utility model, effectively control Optical Chromatic and optics is total
It is long, it realizes that small space loads, and the Geometrical MTF of system is made to be greatly improved, high-resolution imaging requirements is realized, if making
It is aspherical with plastic cement, processing cost can also be greatlyd save, realizes and produces in enormous quantities at a low price, promote cost performance.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of the utility model.
[specific embodiment]
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, a kind of video conference optical imaging system, is successively arranged the first lens 1, second by object plane to image planes
Lens 2, aperture of the diaphragm A, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7, optical filter 8 and sense
Mating plate 9；First lens 1 are negative focal length lens, and the one side towards object plane is convex surface, and the another side towards image planes is recessed
Face；Second lens 2 are positive focal length lenses, and object side is convex surface, and image side surface is concave surface；The third lens 3 are positive focal length lenses,
It is Glass aspheric for biconvex；4th lens 4 are positive focal length lenses, and the one side towards object plane is convex surface, towards image planes
Side is concave surface, is glass spherical surface；5th lens 5 are negative focal length lens, are convex surface towards the side of object plane, towards image planes
Side is concave surface, is glass spherical surface；6th lens 6 are positive focal length lenses, are meniscus shaped lens, towards the one side of object plane
For concave surface, the another side towards image planes is convex surface；7th lens 7 are negative focal length lens；The wherein imaging surface of the first lens 1
Effective aperture size is D1, and the spacing of the first lens 1 and sensitive film 9 is TL, and the total focal length of optical lens is f, between D1, TL, f
Meet: 0.15 < f/TL < 0.35,0.55 < D1/TL < 0.85, D1 < 17MM；The height of the sensitive film 9 is IMC, optical lens
Total focal length is f, is met between IMC and f: 0.4<f/IMC<0.5, wherein IMC>17MM.With 7 eyeglasses, aspherical ball adding
Face and cemented doublet combination, the height of the sensitive film 9 are IMC, and the total focal length of optical lens is f, are met between IMC and f:
0.4<f/IMC<0.5, wherein IMC>15MM.Realize big picture and high pixel blur-free imaging requirement.Wherein D1 meets D1 < 17MM,
The spacing of first lens 1 and sensitive film 6 is TL, TL < 30mm, effectively saving loading space.
As shown in Figure 1, first lens 1 are negative focal length lens, the one side towards object plane is convex aspheric surface, direction
The another side of image planes is that concave surface is aspherical, effectively collapses high angle scattered light, realizes that horizontal field of view angle is greater than 83 °, the face R2 is effective
The correction variable for having neutralized the generation of other eyeglasses, meets the small distortion imaging requirements of screen meeting optical system, and optical distortion <-
5%, TV aberration control are in -2.1%~3.5% range.
5th lens can be negative lens, be biconcave lens, meeting same performance situation, the 5th lens can also be used just
Lens are in meniscus shaped lens, and the one side towards object plane is convex lens, and the another side towards image planes is concave lens, or
For biconvex lens.
7th lens 7 are negative focal length lens, can be M type lens, can also be meniscus shaped lens, towards the one of object plane
Face is convex surface, and the another side towards image planes is concave surface.
First lens 1 can be spherical lens, be also possible to non-spherical lens, and the second lens 2 can be non-spherical lens,
The third lens 3 are non-spherical lens, and the 4th lens 4 and the 5th lens 5 can be cemented doublet, the 6th lens 6 and the 7th lens
7 can be non-spherical lens.
In addition, during this Optical System Design, 7 pieces of eyeglasses can remove the 5th lens and all using glass material
Outside the spherical surface cemented doublet that six lens use, other several pieces of eyeglasses: the first lens 1, the second lens 2, the third lens the 3, the 6th are saturating
Plastic cement aspherical lens all can be used in mirror 6, the 7th lens 7, optimize the performance of optical system.
This optical system can have preferable imaging performance under 70 ° of situations of -20 ° of low temperature and high temperature, meet high/low temperature, high temperature
High humidity operating condition.
First lens 1, the second lens 2, the third lens 3, the aspherical surface shape of the 6th lens 6 and the 7th lens 7 are full
Sufficient equation: In public affairs
In formula, parameter c is curvature corresponding to radius, and y is radial coordinate, and unit is identical with length of lens unit, and k is circular cone two
Secondary curve coefficients；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, the face shape of lens
Curve is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0, lens
Face shape curve be circle, when k-factor is greater than 0, the face shape curves of lens is oblateness；α1To α8Respectively indicate each radial seat
The corresponding coefficient of mark.
Embodiment data are as follows: table one
Table two:
Claims (10)
1. a kind of video conference optical imaging system, it is characterised in that successively include by object plane to image planes:
First lens (1) are negative focal length lens, and object side is convex surface, and image side surface is concave surface；
Second lens (2) are positive focal length lenses, and object side is convex surface, and image side surface is concave surface；
The third lens (3) are positive focal length lenses, and object side image side surface is all convex surface；
4th lens (4)；
5th lens (5)；
6th lens (6) are positive focal length lenses, are meniscus shaped lens, and object side is concave surface, and image side surface is convex surface；
7th lens (7) are negative focal length lens, object side surface and image interface be all it is aspherical, at least one is anti-for image interface
Qu Dian；
And optical filter (8) and sensitive film (9)；
Wherein the caliber size of the first lens (1) is the lens of D1, D1 < 17MM, first (1) and the spacing of sensitive film (9) is TL, light
Learning the total focal length of camera lens is f, and the height of the sensitive film (9) is IMC；Meet between D1, TL, f: 0.15 < f/TL < 0.35,
Meet between 0.55<D1/TL<0.85, IMC and f: 0.4<f/IMC<0.5, wherein IMC>17MM.
2. a kind of video conference optical imaging system according to claim 1, it is characterised in that the 4th lens (4) are positive coke
Away from lens, the one side towards object plane is convex surface, and the side towards image planes is concave surface, is glass spherical surface.
3. a kind of video conference optical imaging system according to claim 1, it is characterised in that the 5th lens (5) are negative coke
It is convex surface towards the side of object plane away from lens, is concave surface towards the side of image planes, is glass spherical surface.
4. a kind of video conference optical imaging system according to claim 1, it is characterised in that the 7th lens (7) are
Negative focal length lens can be M type lens or meniscus shaped lens, and the one side towards object plane is convex surface, and the another side towards image planes is
Concave surface.
5. a kind of video conference optical imaging system according to claim 1, it is characterised in that the first lens (1) are spherical surface
Lens or non-spherical lens.
6. a kind of video conference optical imaging system according to claim 1, it is characterised in that the second lens (2) and third
Lens (3) are non-spherical lens.
7. a kind of video conference optical imaging system according to claim 1, it is characterised in that the 4th lens (4) and the 5th
Lens (5) are balsaming lens.
8. a kind of video conference optical imaging system according to claim 1, it is characterised in that the first lens (1), second
Lens (2), the 6th lens (6), the 7th lens (7) are Glass aspheric or plastic cement aspherical lens.
9. a kind of video conference optical imaging system according to claim 1, it is characterised in that optical system works condition
It is -20 °~70 °.
10. a kind of video conference optical imaging system according to claim 8, it is characterised in that: the first lens
(1), the aspherical surface shape of the second lens (2), the 6th lens (6) and the 7th lens (7) meets equation: In 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；When k-factor is less than -1, the face shape curve of lens is
Hyperbola, when k-factor is equal to -1, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face of lens
Shape curve is ellipse, and when k-factor is equal to 0, the face shape curve of lens is circle, and when k-factor is greater than 0, the face shape of lens is bent
Line is oblateness；α1To α8Respectively indicate coefficient corresponding to each radial coordinate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820427906.5U CN208297811U (en) | 2018-03-28 | 2018-03-28 | A kind of video conference optical imaging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820427906.5U CN208297811U (en) | 2018-03-28 | 2018-03-28 | A kind of video conference optical imaging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111198438A (en) * | 2020-03-05 | 2020-05-26 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
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2018
- 2018-03-28 CN CN201820427906.5U patent/CN208297811U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111198438A (en) * | 2020-03-05 | 2020-05-26 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| US11740434B2 (en) | 2020-03-05 | 2023-08-29 | Genius Electronic Optical (Xiamen) Co., Ltd. | Optical imaging lens |
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