CN201681207U - Coaxial three-reflection optical system used in full field of view - Google Patents
Coaxial three-reflection optical system used in full field of view Download PDFInfo
- Publication number
- CN201681207U CN201681207U CN2009202451344U CN200920245134U CN201681207U CN 201681207 U CN201681207 U CN 201681207U CN 2009202451344 U CN2009202451344 U CN 2009202451344U CN 200920245134 U CN200920245134 U CN 200920245134U CN 201681207 U CN201681207 U CN 201681207U
- Authority
- CN
- China
- Prior art keywords
- optical system
- catoptron
- vignetting
- folding axle
- district
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 68
- 238000003384 imaging method Methods 0.000 claims abstract description 3
- 230000000007 visual effect Effects 0.000 claims description 20
- 210000001747 pupil Anatomy 0.000 claims description 9
- 210000000003 hoof Anatomy 0.000 claims description 2
- 230000004075 alteration Effects 0.000 abstract description 3
- 238000001444 catalytic combustion detection Methods 0.000 abstract 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Images
Landscapes
- Lenses (AREA)
Abstract
The utility model relates to a coaxial three reflection optical system that full field of vision used, the CCD on this optical system image plane is as follows arranges: 1) calculating an image surface range, a vignetting area range and a non-vignetting area range of the optical system according to the focal length f of the optical system, the field angle 2w and the line obscuration system coefficient alpha; 2) according to the diameter range D of the vignetting zone1And calculating the length of the required CCD, wherein if the effective pixel length of a single CCD is d, nd is not less than 2r (n is 1, 3, 5, and so), and meanwhile, the CCDs are distributed in a non-vignetting area along the radial direction of an image surface, so that all the CCDs participating in push-scan imaging are in the non-vignetting area. The utility model reduces the difficulty of assembly and eliminates the aberration of the optical system completely through the design of the shape of the folding axis reflector and the arrangement of various reflectors; the field of view of the optical system is fully utilized, and the ground coverage width of the camera is expanded.
Description
Technical field
The utility model belongs to the optical application technology, is specifically related to the coaxial three-reflection optical system of a kind of long-focus, the use of full visual field.
Background technology:
Now coaxial three reflecting optical systems that generally use on the space camera since secondary mirror to central obscuration that system caused, to cause existing on the image planes vignetting zone, cause on the image planes uneven illumination even for fear of making CCD be in the vignetting district, the general scheme that adopts the anorthopia field to use, but coaxial three reflecting optical systems that use the anorthopia field will make the apparent field angle of optical system diminish, can not effectively utilize the field angle of optical system, be unfavorable for improving the ground fabric width of camera, reduced the efficient of camera system.
The utility model content:
The purpose of this utility model is to solve the defective that the coaxial three reflecting optical system apparent field angles of using the existing anorthopia field described in the background technology diminish, fabric width reduces.
And folding axle three reflecting optical systems that provide a kind of long-focus, full visual field to use have all utilized the visual field of optical system.Can satisfy to push away the request for utilization of the space camera of sweeping the form imaging.
Solution of the present utility model is: the coaxial three-reflection optical system that use a kind of full visual field, and its special character is: following the arranging of CCD on these optical system image planes:
1) according to the f of optical system focal length, field angle 2w, line block coefficient of combination α, calculate optical system image planes scope, vignetting district scope and do not have the scope in vignetting district:
Calculate the image height H of optical system by formula (1):
H＝f×tan?w (1)
The image planes scope is D:
D＝πH
2 (2)
Calculate the radius r in vignetting district by formula (3):
r＝H×α (3)
Vignetting district scope is:
D
1＝πr
2 (4)
The scope in no vignetting district is:
D
0＝D-D
1＝π(H
2-r
2)；(5)
2) according to the diameter range D in vignetting district
1Calculate the length of required CCD, suppose that effective pixel length of wall scroll CCD is d, then should make nd 〉=2r (n=1,3,5 ...), simultaneously, described CCD radially is arranged in non-vignetting district along image planes, and the CCD that participates in push-scanning image all is in the no vignetting district.
By the CCD that on final image planes, reasonably arranges, make imageing sensor be in non-vignetting district fully, the problem of having avoided vignetting to cause the uneven illumination on the image planes to be spared.
One of employed optical system: comprise principal reflection mirror 1 and secondary mirror 2, form with folding axle catoptron 4, the 3rd catoptron 3 and image planes 5 that primary and secondary mirror optical axis angle at 45 is placed; The special character of this system is, be in the incident ray that the folding axle catoptron of placing with primary and secondary mirror optical axis angle at 45 4 promptly will reflect the primary and secondary mirror, the reflection ray of three catoptrons is passed from folding axle catoptron 4, and both light beams will separate fully and can not disturb, therefore the utility model has designed a kind of horseshoe-shaped folding axle catoptron 4 and shape of being shaped as and constitutes and be to be provided with by the center that the rectangle of unthreaded hole and a trapezoidal bottom connection form, and the folding axle catoptron 4 that equates with the length of side with one side of its this rectangle that joins of this trapezoidal bottom width; The reflecting surface of these two kinds folding axle catoptrons 4 is used to reflect the reflection ray of primary and secondary mirror, and middle unthreaded hole is used for seeing through the reflection ray of the 3rd catoptron 3.
Because the processing and manufacturing of above two kinds of folding axle catoptrons 4 has certain degree of difficulty, therefore the utility model provides another kind of optical system, its composition still has principal reflection mirror 1, secondary mirror 2, the 3rd catoptron 3, folding axle catoptron 4 and image planes 5 to form, and principal reflection mirror 1, secondary mirror 2, the 3rd catoptron 3 coaxial arrangement, folding axle catoptron 4 can its with 35 °～55 ° angular ranges that optical axis became of the 3rd catoptron 3 in be positioned over the optional position near the emergent pupil.
Block problem for fear of secondary, the utility model also provides the third folding axle catoptron 4, and the shape of this folding axle catoptron is a rectangular parallelepiped, and four jiaos of this rectangular parallelepiped all is fillets.
The utility model has reduced the difficulty of assembling by the design of the shape of doubling axle catoptron and the layout of various catoptrons, has eliminated the aberration of optical system fully; Optical system of the present utility model is suitable for the CCD camera of the linear array push-scanning image of full visual field use, and the visual field that has made full use of optical system has enlarged the ground cover width of camera.
Description of drawings:
Fig. 1 is a CCD arrangement mode synoptic diagram on the utility model optical system image planes.
Fig. 2 is a light path synoptic diagram of the present utility model;
Fig. 3 is a folding axle mirror profile synoptic diagram one of the present utility model;
Fig. 4 is a folding axle mirror profile synoptic diagram two of the present utility model;
Fig. 5 is another light path synoptic diagram of the present utility model;
Fig. 6 is the folding axle mirror intention of another optical system of the utility model;
Fig. 7 is the image quality of the utility model optical system.
Embodiment:
Referring to Fig. 1, the coaxial three-reflection optical system that use the related a kind of full visual field of the utility model, following the arranging of CCD on these optical system image planes:
1) according to the f of optical system focal length, field angle 2w, line block coefficient of combination α, calculate optical system image planes scope, vignetting district scope and do not have the scope in vignetting district:
Calculate the image height H of optical system by formula (1):
H＝f×tan?w (1)
The image planes scope is D:
D＝πH
2 (2)
Calculate the radius r in vignetting district by formula (3):
r＝H×α (3)
Vignetting district scope is:
D
1＝πr
2 (4)
The scope in no vignetting district is:
D
0＝D-D
1＝π(H
2-r
2)；(5)
2) according to the diameter range D in vignetting district
1Calculate the length of required CCD, suppose that effective pixel length of wall scroll CCD is d, then should make nd 〉=2r (n=1,3,5 ...), simultaneously, described CCD radially is arranged in non-vignetting district along image planes, and the CCD that participates in push-scanning image all is in the no vignetting district.
Calculate according to optical system parameter optical system image planes scope, vignetting district scope and do not have the scope in vignetting district.Calculate the image planes length of CCD then according to the diameter range in vignetting district, by rational CCD arrangement mode the CCD of whole participation push-scanning images all is in the no vignetting district then, thereby effectively utilizes whole visual fields.
Referring to Fig. 2, coaxial three reflecting optical systems that use full visual field are by principal reflection mirror 1 and secondary mirror 2, folding axle catoptron 4 with the angle placement at 45 of the optical axis of principal reflection mirror 1 (secondary mirror 2), the 3rd catoptron 3 and image planes 5 are formed, wherein the optical axis coincidence of principal reflection mirror 1 and secondary mirror 2 and secondary mirror 2 are arranged on the reflected light path of principal reflection mirror 1, folding axle catoptron 4 is arranged on the reflected light path of secondary mirror 2, the 3rd catoptron 3 is arranged on the reflected light path of folding axle catoptron 4, and the middle unthreaded hole that the reflection ray of the 3rd catoptron 3 passes folding axle catoptron 4 reflectings surface incides image planes 5.
Referring to Fig. 3,4, two kinds of multi-form folding axle catoptrons 4 that the utility model provides, wherein, a kind ofly be shaped as horseshoe-shaped (part of shape of a hoof hollow do unthreaded hole with), alternative shape constitutes and is to be provided with by the center that the rectangle of unthreaded hole and a trapezoidal bottom connection form, and the folding axle catoptron 4 that equates with the length of side with one side of its this rectangle that joins of this trapezoidal bottom width; The reflecting surface of these two kinds folding axle catoptrons 4 is used to reflect the reflection ray of principal reflection mirror 1 (secondary mirror 2), and middle unthreaded hole is used for seeing through the reflection ray of the 3rd catoptron 3.
This folding axle catoptron 4 not only will reflect the reflection ray of principal reflection mirror 1 (secondary mirror 2), the reflection ray of the 3rd catoptron 3 is passed from folding axle catoptron 4, and both light beams will separate and can not disturb fully.A folding axle catoptron 4 has certain thickness simultaneously, therefore center light hole disposed thereon to need certain outside inclination angle Q be unthreaded hole from the reflecting surface of described folding axle catoptron inclination angle to the back side of this folding catoptron, and computing formula is as follows:
Q＝arctan(H/D)
Wherein: H is the image planes height of optical system, and D is the distance that emergent pupil arrives image planes.
Please describe the direction of knowing this inclination angle, and please mark signal in the drawings.
Referring to Fig. 5, on these optical system image planes arrange and still adopt the form of Fig. 1 in the visual field, optical system is formed still and is made up of principal reflection mirror 1, secondary mirror 2, the 3rd catoptron 3, folding axle catoptron 4 and image planes 5, and principal reflection mirror 1, principal reflection mirror 2, the 3rd catoptron 3 three's coaxial arrangement, eliminated the aberration of optical system fully, folding axle catoptron 4 can its with 35 °～55 ° angular ranges that optical axis became of the 3rd catoptron 3 in be positioned over the optional position near the emergent pupil, here will roll over an axle catoptron 4 and be placed on the exit pupil position, its size and emergent pupil big or small identical.
Referring to Fig. 6, because the profile of above two kinds of folding axle catoptrons is comparatively complicated, processing and manufacturing is difficulty, therefore use and be subjected to certain restriction, for this reason, the utility model has designed the folding axle catoptron of the third shape on the basis of optical system shown in Figure 5, not only volume is less for this folding axle catoptron, and contour structures is comparatively simple, by near the exit pupil position, placing folding axle catoptron, the emergent ray of the 3rd catoptron can be reflected fully, can avoid blocking simultaneously the emergent ray of primary and secondary mirror again, not the problem that can cause secondary to block.
Referring to Fig. 7, the image quality of two kinds of optical systems of the present utility model is all near diffraction limit, and image quality is intact.
It should be noted that these two kinds of optical systems of the present utility model are suitable for the CCD camera of the linear array push-scanning image of full visual field use, made full use of the visual field of optical system, enlarged the ground cover width of camera.
Claims (7)
1. coaxial three-reflection optical system that use full visual field is characterized in that: following the arranging of CCD on these optical system image planes:
1) according to the f of optical system focal length, field angle 2w, line block coefficient of combination α, calculate optical system image planes scope, vignetting district scope and do not have the scope in vignetting district:
Calculate the image height H of optical system by formula (1):
H＝f×tanw (1)
The image planes scope is D:
D＝πH
2 (2)
Calculate the radius r in vignetting district by formula (3):
r＝H×α (3)
Vignetting district scope is:
D
1＝πr
2 (4)
The scope in no vignetting district is:
D
0＝D-D
1＝π(H
2-r
2)； (5)
2) according to the diameter range D in vignetting district
1Calculate the length of required CCD, suppose that effective pixel length of wall scroll CCD is d, then should make nd 〉=2r (n=1,3,5 ... .), simultaneously, described CCD radially is arranged in non-vignetting district along image planes, and the CCD that participates in push-scanning image all is in the no vignetting district.
2. the coaxial three-reflection optical system that use full visual field according to claim 1, it is characterized in that: described system comprises principal reflection mirror, be arranged on secondary mirror on the reflected light path of principal reflection mirror, be arranged on the folding axle catoptron on the reflected light path of secondary mirror and be arranged on the 3rd catoptron on the reflected light path of folding axle catoptron, the optical axis coincidence of described principal reflection mirror and secondary mirror; The reflecting surface of described folding axle catoptron is provided with unthreaded hole, and the optical axis angle at 45 of this folding axle catoptron and described secondary mirror is provided with; The reflection ray of described the 3rd catoptron incides imaging surface by this unthreaded hole.
3. the coaxial three-reflection optical system that use full visual field according to claim 2 is characterized in that: described folding axle catoptron is horseshoe-shaped, and the part of this shape of a hoof hollow forms unthreaded hole.
4. the coaxial three-reflection optical system that use full visual field according to claim 2, it is characterized in that: the shape of described folding axle catoptron is to be formed by a rectangle and a trapezoidal bottom connection that the center is provided with unthreaded hole, and this trapezoidal bottom width equates with the length of side with one side of its this rectangle that joins.
5. the coaxial three-reflection optical system that uses according to claim 3 or 4 described full visual fields, it is characterized in that: the inclination angle to the back side of this folding catoptron is Q=arctan (H/D) to described unthreaded hole from the reflecting surface of described folding axle catoptron, wherein: H is the image planes height of described optical system, and D is the distance that emergent pupil arrives these image planes.
6. the coaxial three-reflection optical system that use full visual field according to claim 1, it is characterized in that: described system comprises principal reflection mirror, be arranged on secondary mirror on the reflected light path of principal reflection mirror, be arranged on the 3rd catoptron on the reflected light path of secondary mirror and be arranged on folding axle catoptron on the reflected light path of the 3rd catoptron, the optical axis coincidence of described principal reflection mirror, secondary mirror and the 3rd catoptron; Described folding axle catoptron is arranged on the exit pupil position, and its optical axis with the 3rd catoptron becomes 35 °～55 ° angles to place; The size of this folding axle catoptron and emergent pupil big or small identical.
7. the coaxial three-reflection optical system that use full visual field according to claim 6 is characterized in that: the shape of described folding axle catoptron is a rectangular parallelepiped, and four jiaos of this rectangular parallelepiped all is fillets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202451344U CN201681207U (en) | 2009-11-04 | 2009-11-04 | Coaxial three-reflection optical system used in full field of view |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202451344U CN201681207U (en) | 2009-11-04 | 2009-11-04 | Coaxial three-reflection optical system used in full field of view |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681207U true CN201681207U (en) | 2010-12-22 |
Family
ID=43346246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202451344U Expired - Fee Related CN201681207U (en) | 2009-11-04 | 2009-11-04 | Coaxial three-reflection optical system used in full field of view |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681207U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869491A (en) * | 2014-03-18 | 2014-06-18 | 中国科学院西安光学精密机械研究所 | Off-axis non-blocking parallel light system capable of eliminating six aberrations |
| CN105425391A (en) * | 2015-11-26 | 2016-03-23 | 中国航空工业第六一八研究所 | Optical system of airborne star sensor |
| CN106125280A (en) * | 2016-08-19 | 2016-11-16 | 四川九洲电器集团有限责任公司 | Zigzag type optical system for field stitching |
| CN108345095A (en) * | 2018-03-30 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | Wide-width low-stray-light all-time star tracker optical structure |
| CN111367067A (en) * | 2018-12-25 | 2020-07-03 | 中国科学院长春光学精密机械与物理研究所 | Total reflection type afocal optical system |
-
2009
- 2009-11-04 CN CN2009202451344U patent/CN201681207U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869491A (en) * | 2014-03-18 | 2014-06-18 | 中国科学院西安光学精密机械研究所 | Off-axis non-blocking parallel light system capable of eliminating six aberrations |
| CN105425391A (en) * | 2015-11-26 | 2016-03-23 | 中国航空工业第六一八研究所 | Optical system of airborne star sensor |
| CN106125280A (en) * | 2016-08-19 | 2016-11-16 | 四川九洲电器集团有限责任公司 | Zigzag type optical system for field stitching |
| CN106125280B (en) * | 2016-08-19 | 2019-04-23 | 四川九洲电器集团有限责任公司 | Zigzag type optical system for field stitching |
| CN108345095A (en) * | 2018-03-30 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | Wide-width low-stray-light all-time star tracker optical structure |
| CN111367067A (en) * | 2018-12-25 | 2020-07-03 | 中国科学院长春光学精密机械与物理研究所 | Total reflection type afocal optical system |
| CN111367067B (en) * | 2018-12-25 | 2020-12-11 | 中国科学院长春光学精密机械与物理研究所 | Total reflection type afocal optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201681207U (en) | Coaxial three-reflection optical system used in full field of view | |
| KR101833576B1 (en) | Wide angle field of view active illumination imaging system | |
| CN102782446B (en) | Board checking device | |
| CA2828159C (en) | A optical lens and a miner's helmet lamp | |
| CN101414054B (en) | Device and method for implementing stereo imaging by overall view ring belt imaging lens | |
| CN103592749B (en) | Free form surface imaging optical system | |
| CN110207616B (en) | Shooting device based on reflection light path | |
| US20190207048A1 (en) | Solar energy collection and transmission device and methods of using thereof | |
| US9223063B2 (en) | Sensing method and system for fresnel lens | |
| CN103809277A (en) | Off-axis triple-reflector | |
| CN212618084U (en) | Optical lens, optical lens group, car light system and vehicle | |
| CN101737728A (en) | Lighting device and projector | |
| CN105467569B (en) | A kind of preposition optical system of off-axis incidence | |
| CN102981254A (en) | Coaxial aspheric surface four-reflecting mirror optical system with long focal length short structure | |
| CN102087407B (en) | Off-axis total reflection optical system with huge field of view | |
| CN103809278A (en) | Off-axis triple-reflector | |
| US20110285882A1 (en) | Camera with volumetric sensor chip | |
| CN102033300A (en) | Panoramic lens and pan-shot system with panoramic lens | |
| CN103226236A (en) | Large-viewing-field spherical three-mirror optical system | |
| CN104181675A (en) | Dead-zone-free panoramic annular-band imaging system using optical thin film to realize refraction and reflection | |
| CN203981954U (en) | One utilizes optical thin film to realize refraction-reflection blind-area-free panoramic endless belt imaging system | |
| CN103645523A (en) | A reflection-type ellipsoid surface diaphragm | |
| US7616389B2 (en) | Optical system | |
| CN209945275U (en) | Shooting device based on reflection light path | |
| CN201641972U (en) | Three-dimensional imaging data acquisition unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20141104 |
|
| EXPY | Termination of patent right or utility model |