CN112285913A - Double-fast-reflection-mirror imaging system for compensating image motion - Google Patents
Double-fast-reflection-mirror imaging system for compensating image motion Download PDFInfo
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- CN112285913A CN112285913A CN202011292407.8A CN202011292407A CN112285913A CN 112285913 A CN112285913 A CN 112285913A CN 202011292407 A CN202011292407 A CN 202011292407A CN 112285913 A CN112285913 A CN 112285913A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
- G02B17/0647—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using more than three curved mirrors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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Abstract
The invention discloses a double-fast-reflection-mirror imaging system for compensating image motion. The system comprises a primary mirror, a secondary mirror, a third mirror, a fourth mirror, a first fast reflecting mirror, a second fast reflecting mirror and a detector. The primary mirror, the secondary mirror, the three mirrors and the four mirrors form a set of coaxial four-mirror optical system, the two fast-reflecting mirrors are placed between the three mirrors and the four mirrors, and rotating shafts of the two fast-reflecting mirrors are perpendicular to each other. The invention aims at the image motion generated by the remote sensing camera in high-speed rotation, can compensate the image motion by using two fast reflecting mirrors, is different from the original compensation mode of one two-dimensional fast reflecting mirror, and can effectively eliminate the image rotation problem generated by one two-dimensional fast reflecting mirror in the compensation process by the mutually vertical rotation state of the two fast reflecting mirrors which are vertically arranged, thereby realizing the two-dimensional rotary scanning imaging in a large range.
Description
Technical Field
The invention relates to the field of optical systems of space remote sensing cameras, in particular to a double-fast-reflection-mirror imaging system for compensating image motion.
Background
In order to realize the imaging in the orbit in a large range, the remote sensing camera can expand the scanning range by rotating around a central shaft at a high speed, thereby realizing the large-amplitude wide observation on the ground. Due to the adoption of two-dimensional high-speed rotation around the central axis, image motion can be generated within an integral time, and the imaging quality is seriously influenced. In order to eliminate image motion caused by high-speed rotation, two single-axis rotating plane fast reflecting mirrors are adopted to compensate the image motion in an integration time, so that better imaging image quality is realized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention designs a double-fast-reflection-mirror imaging optical system for compensating image motion.
The technical scheme adopted by the invention is as follows:
a double fast reflecting mirror imaging system for compensating image motion is designed. The double fast reflection mirror aberration-eliminating layout is characterized by comprising a main mirror 1, a secondary mirror 2, a three-mirror 3, a four-mirror 4, a first fast reflection mirror 5, a second fast reflection mirror 6 and an image surface 7. The light path is reflected to the primary mirror 1, the secondary mirror 2, the tertiary mirror 2, the quaternary mirror 3, the quaternary mirror 4, the fast mirror 5, the fast mirror 6 and the image plane 7 according to incident light. Wherein, primary mirror 1, secondary mirror 2, three mirrors 3 and four mirrors 4 form one set of coaxial four and reflect the light way overall arrangement, place two fast reflection mirrors between three mirrors 3 and four mirrors 4, fast reflection mirror 5 and fast reflection mirror two 6 respectively, fast reflection mirror 5 and fast reflection mirror two 6 are two level crossing, can rotate around its center pin, fast reflection mirror 5 and fast reflection mirror two 6 mounting means need satisfy axis of rotation mutually perpendicular between them.
The primary mirror 1 is a concave aspheric surface reflector;
the secondary mirror 2 is a convex aspheric reflector;
the three mirrors 2 are convex aspheric reflectors;
the four mirrors 4 are concave aspheric reflectors;
the first fast reflecting mirror 5 is a plane reflecting mirror;
the second fast reflecting mirror 6 is a plane reflecting mirror.
Compared with the prior art, the invention has the beneficial effects that: in order to eliminate image shift caused by high-speed rotation, two plane fast reflecting mirrors rotating along a single axis are adopted to compensate the image shift in an integral time, so that better imaging image quality is realized.
Drawings
FIG. 1 is a schematic diagram of a double fast-reflection imaging system for compensating image shift:
FIG. 2 is a schematic side view of a dual fast reflecting mirror imaging system for compensating image motion:
description of the labeling: the optical system comprises a 1-primary mirror, a 2-secondary mirror, a 3-tertiary mirror, a 4-quaternary mirror, a 5-fast reflection mirror I, a 6-fast reflection mirror II, a 7-image plane, an 8-fast reflection mirror I and a 9-fast reflection mirror II.
Detailed Description
The embodiments of the invention will be described in further detail with reference to the accompanying drawings and examples:
the implementation mode of the invention is as follows: the light path is a coaxial four-reflection light path. The focal length of the system is 10000mm, the main mirror 1 is a concave reflector, the radius value is 4500mm, the secondary mirror 2 is a convex reflector, the radius value is 1700mm, the three mirrors 3 are convex reflectors, the radius value is 4400mm, the four mirrors 4 are concave reflectors, and the radius value is 1700 mm. As shown in fig. 2, the first fast reflecting mirror 5 is a plane mirror and can rotate around a first rotating shaft 8 of the first fast reflecting mirror whose center is parallel to the Y axis, and the fast reflecting mirror 6 is also a plane mirror and can rotate around a second rotating shaft 9 of the second fast reflecting mirror whose center is perpendicular to the Y axis, and the rotating shafts of the two are perpendicular to each other.
When the optical system points to perform two-dimensional rotation or translation at high speed, an imaging point can generate a tailing phenomenon which is image motion, in order to compensate the phenomenon, two plane fast-reflecting mirrors are arranged between the three mirrors 3 and the four mirrors 4, the fast-reflecting mirror I5 is coaxial with the three mirrors 3 and the four mirrors 4 and used for converting light rays out at a certain angle, and then the fast-reflecting mirror II 6 is placed on a converted light path and used for converting the light rays to an image surface 7 for imaging.
The rotation directions of the two fast reflecting mirrors are mutually vertical, and the fast reflecting mirrors can be used for compensating image motion in two directions. The first fast reflecting mirror 5 is a plane reflecting mirror and can rotate around a rotating shaft 8 of the first fast reflecting mirror with the center parallel to the Y axis, the second fast reflecting mirror 6 is also a plane reflecting mirror and can rotate around a rotating shaft 9 of the second fast reflecting mirror with the center vertical to the Y axis, the rotating shafts of the first fast reflecting mirror and the second fast reflecting mirror are mutually vertical, and compensation for two-dimensional image shift can be realized when the two fast reflecting mirrors rotate around the rotating shafts respectively.
The fast reflection mirror in the light path eliminates image shift caused by high-speed rotation, two plane fast reflection mirrors rotating along a single axis compensate image shift in an integration time, and therefore better imaging image quality is achieved.
Claims (7)
1. The utility model provides a compensation image moves two imaging system that reflects soon, includes primary mirror (1), secondary mirror (2), three mirrors (3), four mirrors (4), reflects soon mirror (5), reflects soon mirror two (6) and image plane (7), its characterized in that:
the double fast reflecting mirror imaging system sequentially comprises the following components in the direction of an incident light path: the main mirror (1) reflects to the secondary mirror (2), reflects to the third mirror (3) from the secondary mirror (2), reflects to the fourth mirror (4) from the third mirror (3), reflects to the first fast reflector (5) from the fourth mirror (4), reflects to the second fast reflector (6) from the first fast reflector (5), and reflects to the image plane (7) from the second fast reflector (6);
wherein, primary mirror (1), secondary mirror (2), three mirrors (3) and four mirrors (4) form one set of coaxial four and reflect the light way overall arrangement, place two fast anti-mirrors between three mirrors (3) and four mirrors (4), fast anti-mirror one (5) and fast anti-mirror two (6) respectively, fast anti-mirror one (5) and fast anti-mirror two (6) are two level crossing, can rotate around its center pin, fast anti-mirror one (5) and fast anti-mirror two (6) mounting means need satisfy axis of rotation mutually perpendicular between them.
2. The image motion compensated double fast reflecting mirror imaging system according to claim 1, wherein the primary mirror (1) is a concave aspherical mirror.
3. The image motion compensated double fast reflecting mirror imaging system according to claim 1, wherein the secondary mirror (2) is a convex aspheric mirror.
4. The image motion compensated double fast reflecting mirror imaging system according to claim 1, wherein the three mirrors (2) are convex aspheric mirrors.
5. The image motion compensated double fast reflecting mirror imaging system according to claim 1, wherein said four mirrors (4) are aspherical concave mirrors.
6. A motion compensated dual fast reflecting mirror imaging system as claimed in claim 1, wherein the first fast reflecting mirror (5) is a plane mirror.
7. The image motion compensated dual fast reflecting mirror imaging system as claimed in claim 1, wherein the second fast reflecting mirror (6) is a plane mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011292407.8A CN112285913B (en) | 2020-11-18 | 2020-11-18 | Dual-fast-reflection mirror imaging system capable of compensating image shift |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011292407.8A CN112285913B (en) | 2020-11-18 | 2020-11-18 | Dual-fast-reflection mirror imaging system capable of compensating image shift |
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| Publication Number | Publication Date |
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| CN112285913A true CN112285913A (en) | 2021-01-29 |
| CN112285913B CN112285913B (en) | 2023-09-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189756A (en) * | 2021-05-13 | 2021-07-30 | 中国科学院长春光学精密机械与物理研究所 | Surveying and mapping camera optical system |
Citations (6)
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|---|---|---|---|---|
| US20150253552A1 (en) * | 2014-03-05 | 2015-09-10 | Tsinghua University | Off-axial three-mirror optical system with freeform surfaces |
| US20150346022A1 (en) * | 2014-06-03 | 2015-12-03 | Tsinghua University | Off-axial three-mirror optical system with freeform surfaces |
| US20160170190A1 (en) * | 2014-12-11 | 2016-06-16 | Tsinghua University | Off-axis three-mirror optical system with freeform surfaces |
| CN109739014A (en) * | 2019-03-05 | 2019-05-10 | 中国科学院长春光学精密机械与物理研究所 | A kind of optical system put fastly suitable for whole star |
| CN111399077A (en) * | 2020-04-24 | 2020-07-10 | 中国科学院微小卫星创新研究院 | Optical satellite imaging system and imaging method |
| CN213903945U (en) * | 2020-11-18 | 2021-08-06 | 中国科学院上海技术物理研究所 | Double fast reflecting mirror imaging system for compensating image motion |
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2020
- 2020-11-18 CN CN202011292407.8A patent/CN112285913B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150253552A1 (en) * | 2014-03-05 | 2015-09-10 | Tsinghua University | Off-axial three-mirror optical system with freeform surfaces |
| US20150346022A1 (en) * | 2014-06-03 | 2015-12-03 | Tsinghua University | Off-axial three-mirror optical system with freeform surfaces |
| US20160170190A1 (en) * | 2014-12-11 | 2016-06-16 | Tsinghua University | Off-axis three-mirror optical system with freeform surfaces |
| CN109739014A (en) * | 2019-03-05 | 2019-05-10 | 中国科学院长春光学精密机械与物理研究所 | A kind of optical system put fastly suitable for whole star |
| CN111399077A (en) * | 2020-04-24 | 2020-07-10 | 中国科学院微小卫星创新研究院 | Optical satellite imaging system and imaging method |
| CN213903945U (en) * | 2020-11-18 | 2021-08-06 | 中国科学院上海技术物理研究所 | Double fast reflecting mirror imaging system for compensating image motion |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189756A (en) * | 2021-05-13 | 2021-07-30 | 中国科学院长春光学精密机械与物理研究所 | Surveying and mapping camera optical system |
| CN113189756B (en) * | 2021-05-13 | 2023-03-07 | 中国科学院长春光学精密机械与物理研究所 | Surveying and mapping camera optical system |
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| CN112285913B (en) | 2023-09-12 |
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