CN110596991A - Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera - Google Patents
Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera Download PDFInfo
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- CN110596991A CN110596991A CN201910921264.3A CN201910921264A CN110596991A CN 110596991 A CN110596991 A CN 110596991A CN 201910921264 A CN201910921264 A CN 201910921264A CN 110596991 A CN110596991 A CN 110596991A
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- light
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- stray light
- remote sensing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
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- General Physics & Mathematics (AREA)
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Abstract
An ultra-light stray light eliminating component suitable for a coaxial micro-nano remote sensing camera relates to the field of space optical remote sensing, has the characteristics of light weight, simple structure, higher stray light eliminating effect and the like, is excellent in mechanical property, and can meet the dual requirements of the micro-nano camera on the quality and the stray light elimination. The stray light eliminating assembly comprises: the lens comprises a main lens hood, a secondary lens hood and a main bearing structure; the primary mirror light shield and the secondary mirror light shield are fixedly installed through a primary bearing structure respectively. The ultra-light stray light eliminating assembly adopts a coaxial structure form, has a simple structure, and the primary lens hood and the secondary lens hood both use carbon fiber/epoxy composite materials, and has the advantages of small density, high specific stiffness, high specific strength, good processing technology, good dimensional stability, good fatigue resistance, good vibration resistance and the like, thereby meeting the requirements of micro-nano satellite quality and mechanical properties.
Description
Technical Field
The invention relates to the field of space optical remote sensing, in particular to an ultra-light stray light eliminating component suitable for a coaxial micro-nano remote sensing camera.
Background
The micro-nano satellite stray light eliminating assembly has the function of inhibiting stray light and has enough strength and rigidity on the premise of meeting the ultralight quality index of a camera. In general, in order to realize the function of eliminating stray light, the stray light eliminating component of the camera is relatively complex in structural design and too large in mass, and is not suitable for a micro-nano remote sensing camera.
The main lens hood of the stray light eliminating assembly of the space remote sensing camera can be divided into a fixed lens hood and an expandable lens hood. The fixed type light shield can be divided into a cylinder, a waist cylinder, a square cylinder, a hexagon and the like, and the expandable type light shield is divided into a telescopic expandable type, an inflatable expandable type, a follow-up folding light shield and the like. The above light shields have several problems: (1) the mass is relatively large. The quality of the light shield with a complex shape or a complex structure is difficult to control within the quality requirement of the micro-nano satellite, and the index requirement is easily exceeded; (2) the difficulty of structural mechanical property verification is high. When the light shield is designed, not only the function of eliminating stray light but also the mechanical property of the light shield need to be considered. The lens hood has enough strength and rigidity, avoids overlarge dynamic response in the transportation and emission processes, cracks and damages, even influences the structural stability, and reduces the imaging quality of the space camera optical system. The light shield with a complex structure increases the workload and difficulty of mechanical property verification; (3) the development period is long and the processing cost is high. In order to promote the industrialization and scale development trend of the micro-nano satellite, the development period of the satellite is shortened, and the processing difficulty and cost are reduced, so that most of light shields with complex structures cannot meet the current development requirements of the micro-nano satellite.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an ultra-light stray light eliminating component suitable for a coaxial micro-nano remote sensing camera, which has the characteristics of light weight, simple structure, higher stray light eliminating effect and the like, is excellent in mechanical property, and can meet the dual requirements of the micro-nano camera on quality and stray light elimination.
The technical scheme adopted by the invention for solving the technical problem is as follows:
an ultra-light stray light eliminating assembly suitable for a coaxial micro-nano remote sensing camera comprises: the lens comprises a main lens hood, a secondary lens hood and a main bearing structure; the primary mirror light shield and the secondary mirror light shield are fixedly installed through a primary bearing structure respectively.
Preferably, the main mirror shade includes: the diaphragm, the convex beam and the shading cylinder; the shading curtain is of a cylindrical structure, and five layers of equal-height diaphragms are arranged in the shading curtain at equal intervals; the convex cross beam is arranged on the outer surface of the shading cylinder, the length of the convex cross beam is the same as that of the shading cylinder, and the shading cylinder is fixed with the main bearing structure through a hollow structure in the convex cross beam; the two ends of the shading cylinder are respectively provided with an inner flanging and an outer flanging, the inner flanging enables incident light to be round light, and the shading cylinder is fixed with the main bearing structure through the outer flanging.
Preferably, the outer flanging of the shading cylinder is provided with a mechanical interface.
Preferably, the secondary mirror light shield includes: the device comprises a conical cover, inclined vertical ribs, a cylindrical cover and a circular ring plate; the circumference equipartition of muscle is found to one side in the toper cover, the cylinder cover passes through found the muscle to one side and installs in the toper cover, the axial length of cylinder cover is less than the axial length of toper cover, the cylinder cover with the toper cover all is equipped with the breach, just two breach coincidence sets up, the ring plate is installed on the short radial bottom surface of toper cover, seals the cylinder cover.
Preferably, the circular plate is provided with a mechanical interface.
Preferably, the main load-bearing structure comprises: the mirror comprises a main back plate, a support rod and a secondary mirror bracket, wherein the main back plate and the secondary mirror bracket are fixed at two ends of the support rod; the main bearing structure is arranged in the main mirror light shield, the support rod is fixed in the hollow structure in the raised cross beam, the annular plate is fixed with the secondary mirror support, and the light shield barrel flanging is fixed with the main back plate.
Preferably, the outer edges of the main back plate and the secondary mirror bracket are provided with mechanical interfaces.
The invention has the beneficial effects that:
1. the ultra-light stray light eliminating assembly adopts a coaxial structure form, has a simple structure, and the primary lens hood and the secondary lens hood both use carbon fiber/epoxy composite materials, and has the advantages of small density, high specific stiffness, high specific strength, good processing technology, good dimensional stability, good fatigue resistance, good vibration resistance and the like, thereby meeting the requirements of micro-nano satellite quality and mechanical properties.
2. The ultra-light stray light eliminating assembly has flange connection between the main lens hood and the main bearing structure and between the secondary lens hood and the main bearing structure, and the main lens hood and the secondary lens hood are connected with the main bearing structure through polyimide heat insulating spacers. In addition, epoxy glue is smeared in the gap around the connection of the primary lens hood, the secondary lens hood and the primary bearing structure for bonding, so that the problem of structural damage caused by the traditional positioning pin is avoided while the connection strength is ensured.
3. According to the ultra-light stray light eliminating assembly, the two light shields are made of carbon fiber/epoxy composite materials, the thickness of the light shield cylinder part of the main lens light shield is only 0.32mm, and the flanging serving as a mechanical interface is thickened to be 1 mm; the secondary lens hood is 0.3mm thick except the circular ring plate, and the circular ring plate is a mechanical interface and is 0.6mm thick. The two light shields guarantee the mechanical property of the structure and realize ultralightness, and the quality requirement of the micro-nano camera is met.
4. The main mirror light shield of the ultra-light stray light eliminating assembly is provided with the raised cross beam, the main bearing structure supporting rod can be embedded into the main mirror light shield, the external structure of the main mirror light shield does not need to be damaged, and the risk that external stray light enters an optical system is reduced. In addition, the appearance of the main mirror light shield adopts a cylindrical structure, the internal diaphragm is distributed at the same height, the function of eliminating stray light is realized by adopting a simple structural form, the development period is shortened, and the processing cost is reduced.
5. The secondary lens hood of the ultra-light stray light eliminating assembly adopts a double-layer structure combining a conical hood and a cylindrical hood, realizes the function of the secondary lens hood through fewer layers, and has the ultra-light characteristic; the inclined vertical ribs in the secondary lens hood not only play a role in connecting the two layers of hoods, but also strengthen the strength of the secondary lens hood.
6. The main bearing structure of the ultra-light stray light eliminating assembly adopts a single cantilever structure form, is used for a coaxial camera system, can reduce the overall structure quality, and meets the ultra-light requirement of a micro-nano satellite; all parts of the main bearing structure are made of silicon carbide, and the main bearing structure has the advantages of high mechanical stability and high thermal stability.
Drawings
FIG. 1 is an isometric view of an ultra-lightweight parasitic light removal assembly of the present invention.
FIG. 2 is an isometric view of the primary lens hood of the ultra-light parasitic light removal assembly of the present invention.
FIG. 3 is a bottom view of the primary lens hood of the ultra-light parasitic light removal assembly of the present invention.
FIG. 4 is an isometric view of a secondary lens hood of the ultra-light stray light eliminating assembly of the present invention.
FIG. 5 is a top view of a secondary lens hood of the ultra-light stray light eliminating assembly of the present invention.
FIG. 6 is an axonometric view of the main load-bearing structure of the ultra-light stray light eliminating component of the invention.
In the figure: 1. a primary mirror light shield; 2. a secondary mirror lens hood; 3. a main bearing structure; 11. a diaphragm; 12. a raised cross beam; 13. inward flanging; 14. flanging; 15. a shading cylinder; 16. a first mechanical interface; 17. a second mechanical interface; 21. a conical cover; 22. obliquely erecting ribs; 23. a cylindrical cover; 24. a circular ring plate; 25. a third mechanical interface; 31. a main backplane; 32. a support bar; 33. a secondary mirror support; 34. a secondary mirror lens hood mechanical interface; 35. a primary mirror lens hood mechanical interface; 36. a main mirror lens hood boss mechanical interface; 37. the bottom of the supporting rod is flanged;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, an ultra-light stray light eliminating assembly suitable for a coaxial micro-nano remote sensing camera comprises: the lens comprises a primary lens hood 1, a secondary lens hood 2 and a primary bearing structure 3; the primary lens hood 1 and the secondary lens hood 2 are respectively connected through flanges and fixedly installed together with the main bearing structure 3 by using screws.
As shown in fig. 2, the main mirror shade 1 includes: a diaphragm 11, a convex beam 12 and a shading cylinder 15; the shading cylinder 15 is of a cylinder structure, five layers of equal-height diaphragms 11 are arranged in the shading cylinder at equal intervals, and stray light entering a system is absorbed; the raised beam 12 is arranged on one side of the outer surface of the shading cylinder 15, the length of the raised beam is the same as the axial length of the shading cylinder 15, and the shading cylinder 15 and the main bearing structure 3 are fixed through a hollow structure in the raised beam 12; the two ends of the light-shielding cylinder 15 are respectively an inner flange 13 and an outer flange 14, the inner flange 13 makes incident light into circular light, as shown in fig. 3, the light-shielding cylinder 15 is fixed with the main force-bearing structure 3 through a first mechanical interface 16 on the outer flange 14 and a second mechanical interface 17 on the outer edge of the raised beam 12. The light shading cylinder 15 is a main body supporting part of the main lens shading cover 1, the front end of the light shading cylinder is connected with the inner flanging 13, the rear end of the light shading cylinder is connected with the outer flanging 14, the inner part of the light shading cylinder is connected with the diaphragm 11, and the outer part of the light shading cylinder is connected with the convex beam 12.
As shown in fig. 4, the secondary mirror shade 2 includes: a conical cover 21, an inclined vertical rib 22, a cylindrical cover 23 and a circular ring plate 24; the conical cover 21 is positioned on the outermost layer of the secondary mirror light shield 2, directly shields part of stray light from entering the optical system, and a conical surface notch of the conical cover provides an installation space for the primary bearing structure 3 secondary mirror support; the 7 groups of oblique studs 22 are uniformly distributed in the conical cover 21 in the circumference, the cylindrical cover 23 is installed in the conical cover 21 through the oblique studs 22, and the axial length of the cylindrical cover 23 is smaller than that of the conical cover 21. The cylindrical cover 23 and the conical cover 21 are provided with notches, the two notches are overlapped, and the openings of the notches correspond to the raised cross beam 12. The annular plate 24 is mounted on the bottom surface of the short radius of the conical cover 21, sealing the cylindrical cover 23. As shown in fig. 5, a third mechanical interface 25 of 3 primary load-bearing structure secondary mirror supports uniformly distributed along the circumferential direction is arranged in the circular plate 24.
As shown in fig. 6, the main load-bearing structure 3 includes: the mirror comprises a main back plate 31, a support rod 32 and a secondary mirror bracket 33, wherein the main back plate 31 and the secondary mirror bracket 33 are fixed at two ends of the support rod 32; the main force bearing structure 3 is installed in the main lens hood 1, the support rod 32 is fixed in the hollow structure in the raised beam 12, the third mechanical interface 25 on the annular plate 24 is fixed with the secondary lens hood mechanical interface 34 on the secondary lens bracket 33, and the lens hood flanging 14 is fixed with the main lens hood boss mechanical interface 36 on the main back plate 31.
The main lens hood 1 and the secondary lens hood 2 of the ultra-light type hood assembly are both made of carbon fiber/epoxy composite material (CFRP), and the number of carbon fiber layers is properly increased at the connecting position.
Claims (8)
1. The utility model provides an ultralight type stray light subassembly that disappears suitable for remote sensing camera is received a little to coaxial-type which characterized in that should disappear the stray light subassembly and include: the lens comprises a main lens hood, a secondary lens hood and a main bearing structure; the primary mirror light shield and the secondary mirror light shield are fixedly installed through a primary bearing structure respectively.
2. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 1, wherein the primary mirror light shield comprises: the diaphragm, the convex beam and the shading cylinder; the shading curtain is of a cylindrical structure, and five layers of equal-height diaphragms are arranged in the shading curtain at equal intervals; the convex cross beam is arranged on the outer surface of the shading cylinder, the length of the convex cross beam is the same as that of the shading cylinder, and the shading cylinder is fixed with the main bearing structure through a hollow structure in the convex cross beam; the two ends of the shading cylinder are respectively provided with an inner flanging and an outer flanging, the inner flanging enables incident light to be round light, and the shading cylinder is fixed with the main bearing structure through the outer flanging.
3. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 2 is characterized in that a mechanical interface is arranged on a flanging of the shading cylinder.
4. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 1, wherein the secondary mirror light shield comprises: the device comprises a conical cover, inclined vertical ribs, a cylindrical cover and a circular ring plate; the circumference equipartition of muscle is found to one side in the toper cover, the cylinder cover passes through found the muscle to one side and installs in the toper cover, the axial length of cylinder cover is less than the axial length of toper cover, the cylinder cover with the toper cover all is equipped with the breach, just two breach coincidence sets up, the ring plate is installed on the short radial bottom surface of toper cover, seals the cylinder cover.
5. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 4 is characterized in that a mechanical interface is arranged on the circular ring plate.
6. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 1, 2 or 4, wherein the main bearing structure comprises: the mirror comprises a main back plate, a support rod and a secondary mirror bracket, wherein the main back plate and the secondary mirror bracket are fixed at two ends of the support rod; the main bearing structure is arranged in the main mirror light shield, the support rod is fixed in the hollow structure in the raised cross beam, the annular plate is fixed with the secondary mirror support, and the light shield barrel flanging is fixed with the main back plate.
7. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 6 is characterized in that mechanical interfaces are arranged on the outer edges of the main back plate and the secondary mirror support.
8. The ultra-light stray light eliminating assembly suitable for the coaxial micro-nano remote sensing camera according to claim 1, wherein the primary mirror light shield and the secondary mirror light shield are made of carbon fiber and epoxy composite materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910921264.3A CN110596991A (en) | 2019-09-27 | 2019-09-27 | Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910921264.3A CN110596991A (en) | 2019-09-27 | 2019-09-27 | Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera |
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| CN110596991A true CN110596991A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910921264.3A Pending CN110596991A (en) | 2019-09-27 | 2019-09-27 | Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068383A (en) * | 2020-09-18 | 2020-12-11 | 长光卫星技术有限公司 | Stray light eliminating assembly suitable for off-axis three-reflection wide-width remote sensing camera |
| CN112731618A (en) * | 2021-01-15 | 2021-04-30 | 长光卫星技术有限公司 | Light-duty multi-functional secondary mirror bearing structure of integration suitable for space camera |
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| CN204719256U (en) * | 2015-05-27 | 2015-10-21 | 北京空间机电研究所 | The embedded outer light shield of a kind of ultrashort type |
| CN108241198A (en) * | 2018-02-07 | 2018-07-03 | 中国科学院光电研究院 | The main secondary mirror supporting structure of coaxial spaces camera |
| CN109387994A (en) * | 2017-08-04 | 2019-02-26 | 北京空间机电研究所 | A kind of secondary mirror hood for space large caliber camera |
| CN109739065A (en) * | 2019-02-25 | 2019-05-10 | 长光卫星技术有限公司 | Single lever-type main force support structure suitable for micro-nano remote sensing camera |
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2019
- 2019-09-27 CN CN201910921264.3A patent/CN110596991A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7455465B2 (en) * | 2004-07-26 | 2008-11-25 | Ricoh Company, Ltd. | Optical system apparatus, camera and portable information terminal apparatus |
| CN102243414A (en) * | 2010-11-26 | 2011-11-16 | 北京空间机电研究所 | Reflective star sensor light shield |
| CN204719256U (en) * | 2015-05-27 | 2015-10-21 | 北京空间机电研究所 | The embedded outer light shield of a kind of ultrashort type |
| CN109387994A (en) * | 2017-08-04 | 2019-02-26 | 北京空间机电研究所 | A kind of secondary mirror hood for space large caliber camera |
| CN108241198A (en) * | 2018-02-07 | 2018-07-03 | 中国科学院光电研究院 | The main secondary mirror supporting structure of coaxial spaces camera |
| CN109739065A (en) * | 2019-02-25 | 2019-05-10 | 长光卫星技术有限公司 | Single lever-type main force support structure suitable for micro-nano remote sensing camera |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112068383A (en) * | 2020-09-18 | 2020-12-11 | 长光卫星技术有限公司 | Stray light eliminating assembly suitable for off-axis three-reflection wide-width remote sensing camera |
| CN112731618A (en) * | 2021-01-15 | 2021-04-30 | 长光卫星技术有限公司 | Light-duty multi-functional secondary mirror bearing structure of integration suitable for space camera |
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Application publication date: 20191220 |
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