CN208621825U - A kind of telescope optical system for taking pictures - Google Patents
A kind of telescope optical system for taking pictures Download PDFInfo
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- CN208621825U CN208621825U CN201821191762.4U CN201821191762U CN208621825U CN 208621825 U CN208621825 U CN 208621825U CN 201821191762 U CN201821191762 U CN 201821191762U CN 208621825 U CN208621825 U CN 208621825U
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- lens
- negative lens
- image planes
- optical system
- positive lens
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Abstract
The utility model discloses a kind of telescope optical systems for taking pictures, including from object plane along optical axis direction image planes successively sort with convexo-convex first positive lens, the second negative lens with concave surface towards object plane, the 4th negative lens with convex surface towards the third positive lens of object plane and with concave surface towards image planes, first positive lens is towards image planes when the while gluing with the second negative lens towards object plane, in current optical system, the effect of positive lens is to be converged to as optical path, realizes big field angle；Negative lens shortens dramatically lens length for shortening ray tracing distance, compensation dispersion, the correction curvature of field and distortion, this design, and it is clear and close to undistorted to maintain silent frame, realize it is small and exquisite simply, the at low cost and function that can be used for taking pictures.
Description
Technical field
The utility model relates to field of optical systems, especially a kind of telescope optical system for taking pictures.
Background technique
Previous telescope optical system is mainly by eyepiece come direct observing scene, and generally there is no take pictures and record
As function.And sale has the telescope optical system of camera function on current market, then all there is at high cost, camera lens it is big and
The shortcomings that length, structure is complicated.
Utility model content
In order to solve the above technical problems, the purpose of the utility model is to provide a kind of telescope optical systems for taking pictures.
The technical solution adopted in the utility model is:
A kind of telescope optical system for taking pictures, including there is biconvex from object plane along what optical axis direction image planes successively sorted
The first positive lens, with concave surface towards the second negative lens of object plane, with convex surface towards the third positive lens and tool of object plane
There is fourth negative lens of the concave surface towards image planes, first positive lens is towards one side and the second negative lens of image planes towards object plane
It is glued on one side.
Diaphragm is additionally provided between second negative lens and third positive lens.
The diaphragm close to the second negative lens towards the one side of image planes on.
The diaphragm close to third positive lens towards the one side of image planes on.
Optical filter is additionally provided between 4th negative lens and image planes.
The total focal length f of the telescope optical system is 108mm, the focal length f1 of first positive lens meet 0.45 < f1/f <
0.65, the focal length f2 of the second negative lens meet -0.95 < f2/f < -0.65, the focal length f3 of third positive lens meet 0.55 < f3/f <
0.75, the focal length f4 of the 4th negative lens meets -0.85 < f4/f < -0.55.
The utility model has the beneficial effects that
In current optical system, the effect of positive lens is to be converged to as optical path, realizes big field angle；Negative lens is used for
Shortening ray tracing distance, compensation dispersion, the correction curvature of field and distortion, this design shortens dramatically lens length, and maintains complete
Picture is clear and close to undistorted, realize it is small and exquisite simply, the at low cost and function that can be used for taking pictures.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of the utility model first embodiment；
Fig. 2 is the curvature of field and distortion schematic diagram of the utility model first embodiment；
Fig. 3 is the chromatic longitudiinal aberration schematic diagram of the utility model first embodiment；
Fig. 4 is the point range figure schematic diagram of the utility model first embodiment；
Fig. 5 is the structural schematic diagram of the utility model second embodiment；
Fig. 6 is the curvature of field and distortion schematic diagram of the utility model second embodiment；
Fig. 7 is the chromatic longitudiinal aberration schematic diagram of the utility model second embodiment；
Fig. 8 is the point range figure schematic diagram of the utility model second embodiment.
Specific embodiment
As shown in Figure 1, a kind of telescope optical system for taking pictures, including successively sort from object plane 5 along optical axis direction image planes 6
With convexo-convex first positive lens 1, with concave surface towards the second negative lens 2 of object plane 5, with convex surface towards object plane 6
Third positive lens 3 and with concave surface towards the 4th negative lens 4 of image planes 6, one side of first positive lens 1 towards image planes 6
It is glued with the one side of the second negative lens 2 towards object plane 5.In current optical system, the effect of positive lens is to be converged to as light
Big field angle is realized on road；Negative lens makes mirror for shortening ray tracing distance, compensation dispersion, the correction curvature of field and distortion, this design
Head length shortens dramatically, and it is clear and close to undistorted to maintain silent frame, realize it is small and exquisite simply, it is at low cost and can be used for
The function of taking pictures.
It is additionally provided with diaphragm 8 between second negative lens 2 and third positive lens 3, for adjusting the size of areas imaging.
In the first embodiment, the diaphragm 8 close to the second negative lens 2 towards the one side of image planes 6 on.Entire telescope optical system at this time
Focal length be 108mm, optics overall length TTL=115mm, full filed distortion < 1%, design parameter reference table one:
The diaphragm 8 close to third positive lens 3 towards the one side of image planes 6 on be the utility model second embodiment, this
When entire telescope optical system focal length be 108mm, optics overall length TTL=106.3mm, full filed distortion < 1%, design parameter
Reference table two:
It is additionally provided with optical filter 7 between 4th negative lens 4 and image planes 6, for filtering out part veiling glare, design parameter can
Reference table one and table two.
The total focal length f of the telescope optical system is 108mm, the focal length f1 of first positive lens 1 meet 0.45 < f1/f <
0.65, the focal length f2 of the second negative lens 2 meet -0.95 < f2/f < -0.65, and the focal length f3 of third positive lens 3 meets 0.55 < f3/f
< 0.75, the focal length f4 of the 4th negative lens 4 meets -0.85 < f4/f < -0.55.
The foregoing is merely the preferred embodiments of the utility model, the utility model is not limited to above-mentioned embodiment party
Formula, if with essentially identical means realize the utility model aim technical solution belong to the protection scope of the utility model it
It is interior.
Claims (6)
1. a kind of telescope optical system for taking pictures, it is characterised in that: including what is successively sorted from object plane along optical axis direction image planes
With convexo-convex first positive lens, with concave surface towards object plane the second negative lens, with convex surface towards object plane third just
Lens and with concave surface towards the 4th negative lens of image planes, one side and second negative lens of first positive lens towards image planes
One side towards object plane is glued.
2. a kind of telescope optical system for taking pictures according to claim 1, it is characterised in that: second negative lens
Diaphragm is additionally provided between third positive lens.
3. a kind of telescope optical system for taking pictures according to claim 2, it is characterised in that: the diaphragm is close to
Two negative lenses are towards in the one side of image planes.
4. a kind of telescope optical system for taking pictures according to claim 2, it is characterised in that: the diaphragm is close to
Three positive lens are towards in the one side of image planes.
5. a kind of telescope optical system for taking pictures according to claim 1, it is characterised in that: the 4th negative lens
Optical filter is additionally provided between image planes.
6. a kind of telescope optical system for taking pictures according to claim 1, it is characterised in that: the telescope optical system
Total focal length f be 108mm, the focal length f1 of first positive lens meets 0.45 < f1/f < 0.65, the focal length f2 of the second negative lens
Meet -0.95 < f2/f < -0.65, the focal length f3 of third positive lens meets 0.55 < f3/f < 0.75, the focal length f4 of the 4th negative lens
Meet -0.85 < f4/f < -0.55.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821191762.4U CN208621825U (en) | 2018-07-25 | 2018-07-25 | A kind of telescope optical system for taking pictures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821191762.4U CN208621825U (en) | 2018-07-25 | 2018-07-25 | A kind of telescope optical system for taking pictures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208621825U true CN208621825U (en) | 2019-03-19 |
Family
ID=65707382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821191762.4U Active CN208621825U (en) | 2018-07-25 | 2018-07-25 | A kind of telescope optical system for taking pictures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208621825U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698501A (en) * | 2021-01-14 | 2021-04-23 | 浙江舜宇光学有限公司 | Camera lens group |
| CN114791660A (en) * | 2021-01-25 | 2022-07-26 | 东京晨美光学电子株式会社 | Camera lens |
| CN116755218A (en) * | 2023-08-16 | 2023-09-15 | 江西联昊光电有限公司 | optical lens |
-
2018
- 2018-07-25 CN CN201821191762.4U patent/CN208621825U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698501A (en) * | 2021-01-14 | 2021-04-23 | 浙江舜宇光学有限公司 | Camera lens group |
| CN114791660A (en) * | 2021-01-25 | 2022-07-26 | 东京晨美光学电子株式会社 | Camera lens |
| CN116755218A (en) * | 2023-08-16 | 2023-09-15 | 江西联昊光电有限公司 | optical lens |
| CN116755218B (en) * | 2023-08-16 | 2023-12-01 | 江西联昊光电有限公司 | optical lens |
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