CN205374852U - Low distortion optical imaging system of high picture - Google Patents
Low distortion optical imaging system of high picture Download PDFInfo
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- CN205374852U CN205374852U CN201521106443.5U CN201521106443U CN205374852U CN 205374852 U CN205374852 U CN 205374852U CN 201521106443 U CN201521106443 U CN 201521106443U CN 205374852 U CN205374852 U CN 205374852U
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Abstract
The utility model discloses a low distortion optical imaging system of high picture, accessory things incline image planes and have set gradually first lens, second lens, third lens, fourth lens, the 5th lens, VI lenses, the 7th lens, the 8th lens, light filter and photosensitive sheets, are equipped with the diaphragm between fourth lens and the 5th lens, first lens, fourth lens and VI lenses are the negative focal length lens, the second lens, the third lens, the 5th lens, the 7th lens and the 8th lens are positive focus lens, first lens, the 7th lens and the 8th lens are aspherical lens, the second lens, the third lens, the fourth lens, the 5th lens and VI lenses are spherical lens. The utility model discloses the big problem of big angle of vision distortion can be solved, the height of wide -angle light at system's interarea can be effectively reduced to reduce designability tolerance sensitiveness. The utility model discloses a distortion only is 1% under full visual field, the requirement of taking photo by plane to the distortion is satisfied at very little within range to distortion control.
Description
[technical field]
This utility model relates to the low distorted optical imaging system of a kind of high picture, particularly relates to and a kind of is applied to that unmanned plane is taken photo by plane, the picture element of micro-aspect such as single-lens is high, picture is big, distort little optical imaging system.This eyeglass is made up of three non-spherical lenses and five spherical lenss.
[background technology]
There are some drawbacks in currently used unmanned plane camera lens of taking photo by plane, most visual field is little, resolution is low, picture element is poor, it is few to obtain quantity of information, and distortion is also corresponding relatively big, and shooting picture can not present reality sight authentic and validly.
This utility model is based on the shortcoming proposition of above-mentioned prior art existence.
[utility model content]
Technical problem to be solved in the utility model there are provided the low distorted optical imaging system of a kind of high picture, this optical imaging system achieves high picture element, high-resolution, large aperture imaging, big view field imaging and the little requirement that distorts can be met, as unmanned plane is taken photo by plane and the field such as micro-one camera.
For achieving the above object, this utility model have employed following technical proposals:
A kind of low distorted optical imaging system of high picture, it is characterized in that from thing side to image planes, be disposed with the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, optical filter and sensitive film, between described 4th lens and the 5th lens, be provided with diaphragm；For controlling thing side's angle of incidence of light and reducing the first lens of image deformation, the 4th lens and the 6th lens are negative focal length lens；For focusing on the second lens of light beam above, the 3rd lens, the 5th lens, the 7th lens and the 8th lens are positive focal length lens；The first described lens, the 7th lens and the 8th lens are non-spherical lenses；Described second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens are spherical lenss.
The low distorted optical imaging system of a kind of high picture described above, it is characterised in that the first lens are convex hyperbola aspheric surface towards thing side one side, is matrix hyperbola aspheric surface towards image planes one side；Described second lens are sphere towards thing side one side with towards image planes one side；Described 3rd lens and the 4th lens are glued construction.The glass material that the high low-refraction different by model and Abbe number differ greatly is made；Described 3rd lens and the 4th lens are sphere towards thing side one side with towards image planes one side；Described 5th lens and the 6th lens are glued construction；The glass material that the high low-refraction different by model and Abbe number differ greatly is made；Described 5th lens and the 6th lens are sphere towards thing side one side with towards image planes one side；Described 7th lens, towards the oblate aspheric surface of thing side one side, are oval aspheric towards image planes one side；Described 8th lens are hyperbola aspheric surface towards thing side one side, are oblate aspheric surface towards image planes one side；It is provided with diaphragm between described 4th lens and the 5th lens.
The low distorted optical imaging system of a kind of high picture described above, it is characterised in that described 3rd lens and the 4th lens composition cemented doublet, the 5th lens and the 6th lens composition cemented doublet.
The low distorted optical imaging system of a kind of high picture described above, it is characterized in that the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the 3rd lens is f3, and the focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, the focal length of the 6th lens is f6, the focal length of the 7th lens is f7, and the focal length of the 8th lens is f8, meets:
-1 < (f1)/(f2) < 0,
-1 < (f3)/(f4) < 0,
-3 < (f5)/(f6) <-2,
0<(f7)/(f8)<1。
The low distorted optical imaging system of a kind of high picture described above, it is characterized in that the abbe number of described first lens is lens1, the abbe number of the second lens is lens2, the abbe number of the 3rd lens is lens3, and the abbe number of the 4th lens is lens4, and the abbe number of the 5th lens is lens5, the abbe number of the 6th lens is lens6, the abbe number of the 7th lens is lens7, and the abbe number of the 8th lens is lens8, meets:
Vd (lens1, lens4, lens5, lens7, lens, 8) >=45；
Vd (lens2, lens3, lens6)≤40.
The low distorted optical imaging system of a kind of high picture described above, it is characterized in that the focal length of described optical system is EFL, rear Jiao is BFL, the center thickness respectively T3 of described 3rd lens, the center thickness respectively T4 of the 4th lens, the center thickness respectively T5 of the 5th lens, center thickness respectively T6 with the 6th lens, 7th lens center thickness respectively T7, the center thickness respectively T8 of the 8th lens, the spacing of the first lens and the second lens is A1, the spacing of the second lens and the 3rd lens is A2, the spacing of the 4th lens and the 5th lens is A4, the spacing of the 6th lens and the 7th lens is A6, the spacing of the 7th lens and the 8th lens is A7, the spacing of described first lens and sensitive film is TL, meet:
0.2 < (EFL)/(TL) < 0.3,
0.3 < (BFL)/(TL) < 0.4,
0.1 < (T7)/(TL) < 0.2,
0 < (T8)/(TL) < 0.1,
2 < (T3)/(T4) < 3,
2 < (T5)/(T6) < 3
2 < (T7)/(T8) < 3
0.5 < (A2)/(A1) < 0.8,
0 < (A6)/(A4) < 0.1
0 < (A7)/(A6) < 1
7, a kind of height draws low distortion single optical imaging system as mentioned above, it is characterised in that described second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens are glass spherical lens；Described first lens, the 7th lens and the 8th lens are glass aspheric lenses.
The beneficial effects of the utility model are:
1, in optical texture of the present utility model, the focal length of the first lens 1 is f1, the focal length of the second lens 2 is f2, the focal length of the 3rd lens 3 is f3, the focal length of the 4th lens 4 is f4, the focal length of the 5th lens 5 is f5, and the focal length of the 6th lens 6 is f6, and the focal length of the 7th lens 7 is f7, the focal length of the 8th lens 8 is f8, meet :-1 < f1/f2 < 0 ,-1 < f3/f4 < 0 ,-3 < f5/f6 <-2,0 < f7/f8 < 1, the problem that the distortion of the big angle of visual field is big can be solved, can effectively reduce the high angle scattered light height at system interarea, and reduce structural tolerance sensitivity.
2, in this utility model optical texture, the abbe number of the first lens 1 is lens1, the abbe number of the second lens 2 is lens2, the abbe number of the 3rd lens 3 is lens3, and the abbe number of the 4th lens 4 is lens4, and the abbe number of the 5th lens 5 is lens5, the abbe number of the 6th lens 6 is lens6, the abbe number of the 7th lens 7 is lens7, and the abbe number of the 8th lens 8 is lens8, meets between lens:
Vd (lens1, lens4, lens5, lens7, lens, 8) >=45；
Vd (lens2, lens3, lens6)≤40.
This distribution and collocation can solve system axial aberration problems of too thus realizing center high-resolution.
3, this utility model can realize high picture, high picture element, high-resolution, and low distortion images.
4, image planes of the present utility model are overall uniformly, brightness is high, aperture big (F-number reaches F2.4).
5, for aberration correction, it is ensured that high-resolution imaging, have employed two groups of cemented doublets.
6, the first lens of the present utility model, the 7th lens and the 8th lens all adopt aspheric surface, are conducive to the correction of aberration, reduce the distortion of system, make field of view center and edge all have good resolution.The optical transfer function of optical system is greatly improved, it is possible to make the sharpness of this product, transmitance, color reducibility be significantly improved.
7, utilize above reasonable disposition to combine, solve the difficult problem being difficult to high-resolution and low distortion under big visual field, there is structure and the profile of miniaturization and lightness simultaneously.Situation lower half image height at overall length 50mm can reach 11mm.
8, what is more important, distortion of the present utility model is only 1% under full filed, and aberration control, in very little scope, meets the requirement taken photo by plane to distortion；
[accompanying drawing explanation]
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is light path schematic diagram of the present utility model.
[detailed description of the invention]
Below in conjunction with accompanying drawing, this utility model is done further detailed description.
As shown in Figure 1 to Figure 2, a kind of low distorted optical imaging system of high picture, including first lens the 1, second lens the 2, the 3rd lens the 3, the 4th lens the 4, the 5th lens the 5, the 6th lens the 6, the 7th lens the 7, the 8th lens 8 arranged, optical filter 9 and sensitive film 10, between described 4th lens 4 and the 5th lens 5, it is provided with diaphragm 11.Described first lens the 1, the 4th lens the 4, the 6th lens 6 are negative focal length lens, and described second lens 2 the 3rd lens the 3, the 5th lens the 5, the 7th lens the 7, the 8th lens 8 are positive focal length lens.This optical imaging system achieves the high picture element of the little distortion of the big angle of visual field, large aperture imaging, it is possible to take photo by plane for unmanned plane and the field such as micro-one camera.
As shown in Figure 1 and Figure 2; in the present embodiment; it is provided with optical filter 9 towards the side of image planes at described 8th lens 8; light enters from optical filter 9; when considering to be applied to lens imaging, using CMOS sensitive chip, sensitive chip is had certain protective effect by optical filter; simultaneously also filter a part of light to reduce veiling glare, make image color beautiful and sharp keen while there is good color reducibility.
As shown in Figure 1 and Figure 2, in the present embodiment, described first lens 1 towards a curvature radius of described object plane 12 more than 20, described first lens 1 towards a curvature radius of image planes less than 6.
First lens 1 are convex hyperbola aspheric surface towards thing side one side, are matrix hyperbola aspheric surface towards image planes one side.For controlling thing side's angle of incidence of light and reducing image deformation.
Described second lens 2 are sphere towards thing side one side with towards image planes one side.Light change in refraction angle between each lens can be controlled.
Described 3rd lens 3 and the 4th lens 4 are glued construction.The glass material that the high low-refraction different by model and Abbe number differ greatly is made, it is possible to aberration is compensated.
Described 3rd lens 3 and the 4th lens 4 are sphere towards thing side one side with towards image planes one side.
Described 5th lens 5 and the 6th lens 6 are glued construction；The glass material that the high low-refraction different by model and Abbe number differ greatly is made, it is possible to aberration is compensated.
Described 5th lens 5 and the 6th lens 6 are sphere towards thing side one side with towards image planes one side.
Described 7th lens 7, towards the oblate aspheric surface of thing side one side, are oval aspheric surface towards image planes one side.Distortion increasing light height of incidence in image planes being reduced well, improve the illumination of peripheral field, improving the optical transfer function of system, thus promoting picture element.
Described 8th lens 8 are hyperbola aspheric surface towards thing side one side, are oblate aspheric surface towards image planes one side.Image planes chief ray incidence angles can be reduced, reduce imaging aberration.
It is provided with diaphragm 11, it is possible to control the aperture of light transmission so that imaging picture is overall uniformly, brightness is high between described 4th lens 4 and the 5th lens 5.
Described 3rd lens the 3, the 4th lens 4 form cemented doublet, and the 5th lens the 5, the 6th lens 6 form cemented doublet.The glass material that the high low-refraction different by model and Abbe number differ greatly is made, it is possible to improve picture element while aberration is compensated.
As shown in Figure 1 and Figure 2, in the present embodiment, the focal length of the first lens 1 is f1, the focal length of the second lens 2 is f2, and the focal length of the 3rd lens 3 is f3, and the focal length of the 4th lens 4 is f4, the focal length of the 5th lens 5 is f5, the focal length of the 6th lens 6 is f6, and the focal length of the 7th lens 7 is f7, and the focal length of the 8th lens 8 is f8, meet :-1 < f1/f2 < 0,-1 < f3/f4 < 0 ,-3 < f5/f6 <-2,0 < f7/f8 < 1.Focal length assignment problem and the tolerance distributing equilibrium sex chromosome mosaicism of this utility model structure can be solved, it is possible to effectively reduce the high angle scattered light height at system interarea, and reduce structural tolerance sensitivity.
As shown in Figure 1 and Figure 2, in the present embodiment, the abbe number of the first lens 1 is lens1, and the abbe number of the second lens 2 is lens2, and the abbe number of the 3rd lens 3 is lens3, the abbe number of the 4th lens 4 is lens4, the abbe number of the 5th lens 5 is lens5, and the abbe number of the 6th lens 6 is lens6, and the abbe number of the 7th lens 7 is lens7, the abbe number of the 8th lens 8 is lens8, meets between lens:
Vd (lens1, lens4, lens5, lens7, lens, 8) >=45；
Vd (lens2, lens3, lens6)≤40.
This distribution and collocation can solve system axial aberration problems of too thus realizing center high-resolution.
nullSuch as Fig. 1、Shown in Fig. 2，In the present embodiment，The focal length of described optical system and rear Jiao respectively EFL and BFL，Center thickness respectively T3 and the T4 of described 3rd lens 3 and the 4th lens 4，Center thickness respectively T5 and the T6 of the 5th lens 5 and the 6th lens 6，Center thickness respectively T7 and the T8 of the 7th lens 7 and the 8th lens 8，The spacing of the first lens 1 and the second lens 2 is A1，The spacing of the second lens 2 and the 3rd lens 3 is A2，The spacing of the 4th lens 4 and the 5th lens 5 is A4，The spacing of the 6th lens 6 and the 7th lens 7 is A6，The spacing of the 7th lens 7 and the 8th lens 8 is A7，The spacing of described first lens 1 and sensitive film 10 is TL，Meet: 0.2 < EFL/TL < 0.3，0.3 < BFL/TL < 0.4，0.1 < T7/TL < 0.2，0 < T8/TL < 0.1，2 < T3/T4 < 3，2 < T5/T6 < 3，2 < T7/T8 < 3，0.7 < A2/A1 < 0.8，0 < A6/A4 < 0.1，0 < A7/A6 < 1.Can effectively compress aberration, and guarantee Machinability Evaluation, make camera lens entirety acutance promote.
As shown in Figure 1 and Figure 2, in the present embodiment, described second lens the 2, the 3rd lens the 3, the 4th lens the 4, the 5th lens the 5, the 6th lens 6 are spherical lens, and the aspherical surface shape of described first lens the 1, the 7th lens 7 and the 8th lens 8 meets equation: In formula, parameter c is the curvature corresponding to radius, and y is that its unit of radial coordinate is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1, the face sigmoid curves of lens is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor is between-1 to 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, and when k-factor is more than 0, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
Claims (7)
1. the low distorted optical imaging system of high picture, it is characterized in that being disposed with the first lens (1), the second lens (2), the 3rd lens (3), the 4th lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7), the 8th lens (8), optical filter (9) and sensitive film (10) from thing side (12) to image planes, between described 4th lens (4) and the 5th lens (5), be provided with diaphragm (11)；For controlling thing side's angle of incidence of light and reducing by first lens (1) of image deformation, the 4th lens (4) and the 6th lens (6) are negative focal length lens；For focusing on second lens (2) of light beam above, the 3rd lens (3), the 5th lens (5), the 7th lens (7) and the 8th lens (8) are positive focal length lens；Described the first lens (1), the 7th lens (7) and the 8th lens (8) are non-spherical lenses；Described second lens (2), the 3rd lens (3), the 4th lens (4), the 5th lens (5) and the 6th lens (6) are spherical lenss.
2. the low distorted optical imaging system of a kind of high picture according to claim 1, it is characterised in that the first lens (1) be convex hyperbola aspheric surface towards thing side one side, are simultaneously matrix hyperbola aspheric surface towards image planes；Described second lens (2) are sphere towards thing side one side with towards image planes one side；Described 3rd lens (3) and the 4th lens (4) are glued construction；The glass material that the high low-refraction different by model and Abbe number differ greatly is made；Described 3rd lens (3) and the 4th lens (4) are sphere towards thing side one side with towards image planes one side；Described 5th lens (5) and the 6th lens (6) are glued construction；The glass material that the high low-refraction different by model and Abbe number differ greatly is made；Described 5th lens (5) and the 6th lens (6) are sphere towards thing side one side with towards image planes one side；Described 7th lens (7), towards the oblate aspheric surface of thing side one side, are oval aspheric towards image planes one side；Described 8th lens (8) are hyperbola aspheric surface towards thing side one side, are oblate aspheric surface towards image planes one side；It is provided with diaphragm (11) between described 4th lens (4) and the 5th lens (5).
3. the low distorted optical imaging system of a kind of high picture according to claim 1, it is characterized in that described 3rd lens (3) and the 4th lens (4) composition cemented doublet, the 5th lens (5) and the 6th lens (6) composition cemented doublet.
4. the low distorted optical imaging system of a kind of high picture according to claim 1, it is characterized in that the focal length of the first lens (1) is f1, the focal length of the second lens (2) is f2, the focal length of the 3rd lens (3) is f3, the focal length of the 4th lens (4) is f4, the focal length of the 5th lens (5) is f5, the focal length of the 6th lens (6) is f6, the focal length of the 7th lens (7) is f7, the focal length of the 8th lens (8) is f8, meets:
-1 < f1/f2 < 0,
-1 < f3/f4 < 0,
-3 < f5/f6 <-2,
0<f7/f8<1。
5. the low distorted optical imaging system of a kind of high picture according to claim 1, it is characterized in that the abbe number of described first lens (1) is lens1, the abbe number of the second lens (2) is lens2, the abbe number of the 3rd lens (3) is lens3, the abbe number of the 4th lens (4) is lens4, the abbe number of the 5th lens (5) is lens5, the abbe number of the 6th lens (6) is lens6, the abbe number of the 7th lens (7) is lens7, the abbe number of the 8th lens (8) is lens8, meets:
Vd (lens1, lens4, lens5, lens7, lens8) >=45；
Vd (lens2, lens3, lens6)≤40.
null6. the low distorted optical imaging system of a kind of high picture according to claim 1，It is characterized in that the focal length of described optical system is EFL,Rear Jiao is BFL，The center thickness respectively T3 of described 3rd lens (3)，The center thickness respectively T4 of the 4th lens (4)，The center thickness respectively T5 of the 5th lens (5)，Center thickness respectively T6 with the 6th lens (6)，7th lens (7) center thickness respectively T7，The center thickness respectively T8 of the 8th lens (8)，The spacing of the first lens (1) and the second lens (2) is A1，The spacing of the second lens (2) and the 3rd lens (3) is A2，The spacing of the 4th lens (4) and the 5th lens (5) is A4，The spacing of the 6th lens (6) and the 7th lens (7) is A6，The spacing of the 7th lens (7) and the 8th lens (8) is A7，The spacing of described first lens (1) and sensitive film (10) is TL，Meet:
0.2 < EFL/TL < 0.3,
0.3 < BFL/TL < 0.4,
0.1 < T7/TL < 0.2,
0 < T8/TL < 0.1,
2 < T3/T4 < 3,
2 < T5/T6 < 3
2 < T7/T8 < 3
0.5 < A2/A1 < 0.8,
0 < A6/A4 < 0.1
0 < A7/A6 < 1.
7. the low distorted optical imaging system of a kind of high picture according to claim 1, it is characterized in that described second lens (2), 3rd lens (3), 4th lens (4), the 5th lens (5) and the 6th lens (6) are glass spherical lens；Described first lens (1), the 7th lens (7) and the 8th lens (8) are glass aspheric lenses.
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| CN201521106443.5U CN205374852U (en) | 2015-12-24 | 2015-12-24 | Low distortion optical imaging system of high picture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445908A (en) * | 2015-12-24 | 2016-03-30 | 中山联合光电科技股份有限公司 | High-image quality, large-image frame and small-distortion optical imaging system |
| CN108919467A (en) * | 2018-09-21 | 2018-11-30 | 广东奥普特科技股份有限公司 | A kind of lens assembly carrying out multi-angle of view shooting |
| CN112162387A (en) * | 2020-11-03 | 2021-01-01 | 福建福光股份有限公司 | Low-distortion ultra-clear palmprint instrument optical system |
-
2015
- 2015-12-24 CN CN201521106443.5U patent/CN205374852U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445908A (en) * | 2015-12-24 | 2016-03-30 | 中山联合光电科技股份有限公司 | High-image quality, large-image frame and small-distortion optical imaging system |
| CN105445908B (en) * | 2015-12-24 | 2018-02-13 | 中山联合光电科技股份有限公司 | One kind is as matter is high, picture is big, the small optical imaging system of distortion |
| CN108919467A (en) * | 2018-09-21 | 2018-11-30 | 广东奥普特科技股份有限公司 | A kind of lens assembly carrying out multi-angle of view shooting |
| CN112162387A (en) * | 2020-11-03 | 2021-01-01 | 福建福光股份有限公司 | Low-distortion ultra-clear palmprint instrument optical system |
| CN112162387B (en) * | 2020-11-03 | 2022-07-15 | 福建福光股份有限公司 | Low-distortion ultra-clear palmprint instrument optical system |
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