CN112051233B - Small off-axis three-counter ionosphere imager frame device - Google Patents
Small off-axis three-counter ionosphere imager frame device Download PDFInfo
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- CN112051233B CN112051233B CN202010811907.1A CN202010811907A CN112051233B CN 112051233 B CN112051233 B CN 112051233B CN 202010811907 A CN202010811907 A CN 202010811907A CN 112051233 B CN112051233 B CN 112051233B
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- 239000005433 ionosphere Substances 0.000 title claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 58
- 230000004888 barrier function Effects 0.000 claims abstract description 56
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 239000003973 paint Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000009432 framing Methods 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 5
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 108010063955 thrombin receptor peptide (42-47) Proteins 0.000 description 1
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The invention relates to the technical field of space optical remote sensors, in particular to a frame structure of a small off-axis three-counter ionosphere imager, which solves the problems of low rigidity and insufficient stray light inhibition of the frame structure caused by large length-width ratio of the structure due to long focal length and wide field of view of an optical system. The off-axis three-mirror assembly comprises a primary mirror assembly, a secondary mirror assembly and a three-mirror assembly; the main frame comprises an entrance plate, a main mirror substrate, a secondary mirror substrate, a three-mirror substrate, a detector substrate, a top plate, a bottom plate, a support plate I, a support plate II, a light barrier I, a light barrier II and a light barrier III. The structure of the invention has high space utilization rate and high specific rigidity, can inhibit the stray light of the off-axis three-mirror system in a whole path, and effectively improves the imaging quality of the optical system.
Description
Technical Field
The invention relates to the technical field of space optical remote sensing, in particular to a frame structure of a small off-axis three-counter ionosphere imager.
Background
The ionosphere of the earth is an important place for the operation of a near-earth satellite and a space station, and the safety of the space vehicle can be effectively guaranteed by monitoring the characteristic parameters of the ionosphere. The ionosphere imager is a scientific instrument for monitoring ionosphere characteristic parameters, and obtains ionosphere space environment parameters through measurement of far ultraviolet radiation.
The off-axis three-mirror optical system has the advantages of large field of view, high resolution and the like, and is widely applied to the field of space optical remote sensing. Because the off-axis three-mirror system has no central shielding, the primary stray light, the secondary stray light and the stray light in the field entering the optical system can reduce the transfer function of the system, and the imaging quality of the optical system is adversely affected. In order to ensure that stray light is strictly controlled, a stray light suppression method commonly used in the existing structure is to use an outer light shield and an inner light shield plate in a combined manner, but in an ionosphere imager structure with high imaging quality requirement and limited inner space, the stray light suppression system is difficult to meet the use requirement.
In the prior art, the off-axis three-mirror space optical system mostly adopts a truss rod type, a force bearing cylinder type and a frame type main supporting structure. Truss rod type enveloping size is large, mass production is not facilitated, the main force bearing cylinder type design process is complicated, the optical assembly and adjustment of the mirror assembly are complex, the traditional frame type structure is small in specific rigidity, and the space utilization rate is small.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a frame type structure of a small off-axis three-reflection ionosphere imager, which is convenient for optical adjustment of a mirror, has high specific rigidity, can effectively inhibit stray light of the whole optical path of an optical system, and improves the space utilization rate of the structure.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
three anti ionospheric imager frame rack structures of small-size off-axis, this structure includes: the device comprises a front cover plate, a rear cover plate, an off-axis three-mirror assembly, a main frame, a detector assembly, a T-shaped slit structure, a truss rod, a stray light eliminating trap, a shading cylinder and a detector diaphragm.
The off-axis three-mirror assembly comprises a primary mirror assembly, a secondary mirror assembly and a three-mirror assembly.
The primary mirror assembly, the secondary mirror assembly and the three-mirror assembly comprise mirror frames, glue spots and mirrors.
The main frame comprises an integrally formed light inlet plate, a main mirror substrate, a secondary mirror substrate, a three-mirror substrate, a detector substrate, a top plate, a bottom plate, a support plate I, a support plate II, a light barrier I, a light barrier II and a light barrier III; the light inlet plate, the primary mirror substrate, the secondary mirror substrate, the three-mirror substrate, the detector substrate, the top plate, the bottom plate, the support plate I and the support plate II form an outer envelope of the main frame; mounting interfaces are reserved on the main mirror substrate, the secondary mirror substrate, the three-mirror substrate and the detector substrate; a T-shaped slit structure is arranged on the light barrier II; the primary mirror assembly is mounted on the primary mirror substrate; the secondary mirror assembly is arranged on the secondary mirror substrate; the three-mirror assembly is arranged on the three-mirror substrate; the detector assembly is arranged on the detector substrate; one ends of the light barrier I, the light barrier II and the light barrier III are connected in a Y shape, the other end of the light barrier III is connected with the detector substrate, the other end of the light barrier II is connected with the support plate I, and the other end of the light barrier I is connected with the main mirror substrate; the centers of the light barrier I, the light barrier II and the light barrier III are hollowed to ensure that the centers of the off-axis three-reflector optical systems are not blocked; the T-shaped slit structure is arranged at the position, which is not shielded, of the light barrier II in an outer embedded mode; the light shading cylinder I is arranged on the light inlet plate, and the light shading cylinder II and the detector diaphragm are arranged on the detector substrate; truss rods are respectively arranged on the mounting feet of the three-mirror substrate and the detector substrate; the bottom plate is provided with an independently installed stray light eliminating trap; the front cover plate and the rear cover plate are fixed on two end surfaces of the main frame, and the stray light eliminating traps which are integrally formed are arranged at one side of the main mirror chamber, the secondary mirror chamber and the three mirror chambers; two ends of the top plate are respectively connected with the light inlet plate and the main mirror substrate; and two ends of the support plate II are respectively connected with the secondary mirror substrate and the detector substrate.
The light barrier I, the light barrier II and the light barrier III are connected in a Y shape, and the main frame is divided into a main mirror cabin, a secondary mirror cabin and a three-mirror cabin.
Preferably, the T-shaped slit structure is arranged at a non-shielding position on the light barrier II in an outer embedded mode.
Preferably, the off-axis three-mirror assembly and the detector assembly are installed on the installation interface reserved in the main frame in an outer embedded mode.
Preferably, the truss rod and the truss rod mounting foot are assembled in a screw connection and structure limiting mode.
Preferably, the stray light eliminating trap integrally formed with the front cover plate and the rear cover plate is composed of thin plates of 0.3-0.6mm in vertical and horizontal arrangement, and more preferably, the stray light eliminating trap integrally formed with the front cover plate and the rear cover plate is composed of thin plates of 0.5mm in vertical and horizontal arrangement.
Preferably, the inner surface of the main frame, the whole surfaces of the light shielding cylinder I and the light shielding cylinder II, the T-shaped slit structure, the whole surfaces of the light barrier I, the light barrier II and the light barrier III, the whole surface of the detector diaphragm, the inner surfaces of the front cover plate and the rear cover plate, the whole surfaces of the truss rods and the whole surfaces of the optical trap are all sprayed with the stray light eliminating black paint material.
The invention has the beneficial effects that:
1. the front cover plate and the rear cover plate are respectively arranged on the front end surface and the rear end surface of the main frame, and the stray light elimination trap and the stray light elimination paint are combined to use the cabins to inhibit the stray light; the truss rod is connected with the detector mounting plate and the three-mirror mounting plate of the main frame, so that the transverse swinging rigidity of the whole structure is increased. The invention can be used in the fields of small space optical remote sensors and the like.
2. According to the invention, a main frame is divided into a primary mirror cabin, a secondary mirror cabin and a three-mirror cabin by a Y-shaped light barrier composed of a light barrier I, a light barrier II and a light barrier III, and stray light of an off-axis three-mirror system is subjected to cabin separation treatment; the main frame divides the light path of the optical system into three chambers in the internal propagation space of the main frame by utilizing the integrally formed Y-shaped light barrier, so that the rigidity of the main frame is increased; and the main frame of the optical system is divided into three chambers by adopting a Y-shaped light barrier structure, a shading cylinder, an optical trap, a detector diaphragm and a stray light eliminating paint are comprehensively applied in each chamber, and the stray light on a light path propagation path is subjected to the compartmentalization inhibition treatment, so that the stray light inhibition efficiency is greatly improved, the imaging quality of the ionosphere imager is ensured, and meanwhile, the rigidity of the main frame structure is enhanced by the three light barriers connected in a Y shape.
3. The T-shaped slit structure, the off-axis three-mirror assembly and the detector assembly are all installed in an outer embedding mode, so that the optical system is convenient to install and adjust, the space utilization rate is improved, and meanwhile, the T-shaped slit structure, the off-axis three-mirror assembly and the detector assembly are used as a connecting structure to improve the torsional rigidity of the main frame.
Drawings
FIG. 1 is a schematic diagram of a small off-axis three-counter ionosphere imager frame structure according to the present invention;
FIG. 2 is a front view of the main frame structure of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a three-dimensional view of the main frame structure of the present invention;
FIG. 5 is a schematic view of a shade cartridge I of the present invention;
FIG. 6 is a schematic view of a rear cover plate of the present invention;
FIG. 7 is a schematic view of a T-shaped slit structure according to the present invention;
FIG. 8 is a schematic view of a stray light eliminating trap structure according to the present invention;
FIG. 9 is a schematic view of a shade cartridge II of the present invention;
FIG. 10 is a schematic view of a detector diaphragm of the present invention;
FIG. 11 is a schematic view of a truss bar of the present invention;
FIG. 12 is a cross-sectional view of the off-axis three-mirror assembly, T-slit structure, detector assembly, barrel I, barrel II and detector diaphragm mounted on the main frame structure in accordance with the present invention;
reference numerals:
1. the device comprises a secondary mirror assembly, 2, a main frame, 3, a shading cylinder I, 4, a rear cover plate, 5, a T-shaped slit structure, 6, a stray light eliminating trap, 7, a primary mirror assembly, 8, a truss rod, 9, a three-mirror assembly, 10, a shading cylinder II, 11, a detector diaphragm, 12, a detector assembly, 13, a front cover plate, 201, a light inlet plate, 202, a support plate I, 203, a light blocking plate III, 204, a secondary mirror assembly mounting surface, 205, a secondary mirror substrate, 206, a support plate II, 207, a detector substrate, 208, a front cover plate mounting surface, 209, a bottom plate, 210, a truss rod mounting foot, 211, a three-mirror substrate, 212, a three-mirror assembly mounting surface, 213, a light blocking plate I, 214, a primary mirror assembly mounting surface, 215, a primary mirror substrate, 217, a top plate, 216, a light blocking plate II, 218, a T-shaped slit structure mounting surface, 401, a rear cover plate stray light eliminating trap.
Detailed Description
The present invention will be further described with reference to the following specific examples.
As shown in fig. 1-12, an off-axis three counter ionosphere imager frame structure comprises: the device comprises an off-axis three-mirror assembly (a secondary mirror 1, a primary mirror 7 and a three-mirror 9), a main frame 2, a shading cylinder I3, a rear cover plate 4, a T-shaped slit structure 5, a stray light eliminating trap 6, a truss rod 8, a shading cylinder II 10, a detector diaphragm 11, a detector assembly 12 and a front cover plate 13.
The main frame 1 comprises an integrally cast light inlet plate 201, a main mirror substrate 215, a secondary mirror substrate 205, a three-mirror substrate 211, a detector substrate 207, a top plate 217, a bottom plate 209, a support plate I202, a support plate II 206, a light barrier plate III 203, a light barrier plate I213, a light barrier plate II 216 and truss rod mounting feet 210.
The main mirror substrate 215, the secondary mirror substrate 205 and the tertiary mirror substrate 211 are respectively provided with a main mirror assembly mounting surface 214, a secondary mirror assembly mounting surface 204 and a tertiary mirror assembly mounting surface 212, the connection part of the light barrier II 216 and the support plate I202 is provided with a mounting surface 218 of a T-shaped slit structure, and the off-axis three-mirror assembly, the T-shaped slit structure and the detector are embedded and mounted on the mounting surfaces of the main frame from the outer side through screw connection, so that the imaging requirement of the off-axis three-mirror optical system is met, and meanwhile, the off-axis three-mirror assembly, the T-shaped.
One ends of the light barrier III 203, the light barrier I213 and the light barrier II 216 are connected in a Y shape, the other end of the light barrier III 203 is connected with the detector substrate 207, the other end of the light barrier I213 and the main mirror substrate 215 respectively, the other end of the light barrier II 216 is connected with the support plate I202, the main frame is divided into the main mirror cabin, the secondary mirror cabin and the three mirror cabin by the three light barriers connected in the Y shape, the three cabins are used for cabin division processing of stray light of the whole path of the optical system, and meanwhile the rigidity of the main frame structure is effectively improved.
An integrally formed stray light eliminating trap 401 is attached to one side of the front cover plate 13 and the rear cover plate 4 close to the inner side of the cabin, and is connected and installed on the end face 209 of the main frame through screws, so that stray light in each cabin is inhibited, and the transverse swing rigidity of the main frame structure is effectively increased; the shading cylinder I is connected to one side in the cabin of the light inlet plate 201 through a screw; the shading cylinder II and the detector diaphragm are connected to one side of the main frame detector substrate 207 in the cabin through screws; the stray light eliminating trap is independently arranged on one side in the cabin of the bottom plate 209 of the main frame.
The inner surfaces of the front cover plate 13 and the rear cover plate 4 with the stray light eliminating traps, the inner surface of the main frame 2, the whole surface of the shading cylinder I3, the whole surface of the shading cylinder II 10, the whole surface of the stray light eliminating traps 6, the whole surface of the detector diaphragm 11 and the whole surface of the T-shaped slit structure 5 are sprayed with black stray light eliminating paint.
The optical trap 401, the shading cylinder I3 and the impurity removing paint of the front cover plate and the rear cover plate effectively inhibit stray light in the main mirror cabin; the optical trap 401, the shading cylinder II 10, the detector diaphragm 11, the stray light eliminating trap and the stray light eliminating paint of the front cover plate and the rear cover plate effectively inhibit stray light in the three-mirror cabin.
The truss rod 8 combines the truss rod mounting joint 801 and the truss rod mounting foot 210 of the main frame in a screw connection and structure limiting mode, and therefore the transverse swinging rigidity of the main frame structure is enhanced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A compact off-axis three counter ionosphere imager frame assembly comprising: the detector comprises a front cover plate, a rear cover plate, an off-axis three-mirror assembly, a main frame, a detector assembly, a T-shaped slit structure, a truss rod, a stray light eliminating trap, a shading cylinder I, a shading cylinder II and a detector diaphragm, and is characterized in that the off-axis three-mirror assembly comprises a primary mirror assembly, a secondary mirror assembly and a three-mirror assembly; the main frame comprises an integrally formed light inlet plate, a main mirror substrate, a secondary mirror substrate, a three-mirror substrate, a detector substrate, a top plate, a bottom plate, a support plate I, a support plate II, a light barrier I, a light barrier II and a light barrier III; one ends of the light barrier I, the light barrier II and the light barrier III are connected in a Y shape, the other end of the light barrier III is connected with the detector substrate, the other end of the light barrier II is connected with the support plate I, and the other end of the light barrier I is connected with the main mirror substrate; the main frame is divided into a main mirror cabin, a secondary mirror cabin and a three-mirror cabin by a light barrier I, a light barrier II and a light barrier III; the primary mirror assembly is mounted on the primary mirror substrate; the secondary mirror assembly is arranged on the secondary mirror substrate; the three-mirror assembly is arranged on the three-mirror substrate; the detector assembly is arranged on the detector substrate; the light barrier II is provided with a T-shaped slit structure; the light shading cylinder I is arranged on the light inlet plate, and the light shading cylinder II and the detector diaphragm are arranged on the detector substrate; truss rods are respectively arranged on the mounting feet of the three-mirror substrate and the detector substrate; the bottom plate is provided with an independently installed stray light eliminating trap; the front cover plate and the rear cover plate are fixed on two end surfaces of the main frame, and the stray light eliminating traps which are integrally formed are arranged at one side of the main mirror chamber, the secondary mirror chamber and the three mirror chambers; two ends of the top plate are respectively connected with the light inlet plate and the main mirror substrate; and two ends of the support plate II are respectively connected with the secondary mirror substrate and the detector substrate.
2. The small off-axis three counter-ionosphere imager frame apparatus of claim 1, wherein the primary, secondary, and tertiary mirror assemblies each comprise a mirror frame, a glue spot, and a mirror.
3. The compact off-axis three-mirror ionospheric imager frame assembly of claim 1, wherein the off-axis three-mirror assembly and the detector assembly are mounted in an outer embedded manner on a mounting interface reserved in the main frame.
4. The compact off-axis three counter ionosphere imager frame assembly of claim 1, wherein said first, second and third baffles are hollow so that there is no obstruction in the center of the off-axis three mirror system.
5. The compact off-axis three counter ionosphere imager frame assembly of claim 1, wherein said T-shaped slit structure is mounted in an outside-embedded manner in a non-blocking position of the light barrier ii.
6. The compact off-axis triple reflection ionospheric imager frame means of claim 1, wherein said truss rod and truss rod mounting feet are assembled jointly in the form of screw connections and structural stops.
7. The compact off-axis three counter ionosphere imager frame set of claim 1, wherein the stray light traps of the front and back cover plates are comprised of thin plates of 0.3-0.6mm thickness arranged in rows and columns.
8. The framing apparatus of claim 1, wherein the inner surface of the main frame, the entire surfaces of the first and second light-shielding cylinders, the T-shaped slit structure, the entire surfaces of the first, second and third light-shielding plates, the entire surface of the detector diaphragm, the inner surfaces of the front and rear cover plates, the entire surface of the truss rod and the entire surface of the optical trap are coated with black paint materials for eliminating stray light.
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| CN202010811907.1A CN112051233B (en) | 2020-08-13 | 2020-08-13 | Small off-axis three-counter ionosphere imager frame device |
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| CN202010811907.1A CN112051233B (en) | 2020-08-13 | 2020-08-13 | Small off-axis three-counter ionosphere imager frame device |
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| CN113189663B (en) * | 2021-04-02 | 2021-11-09 | 中国科学院国家空间科学中心 | Earth synchronous orbit ionosphere detection device |
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