CN115826186A - Two-reflecting-surface integrated reflector and coaxial four-reflecting optical system applying same - Google Patents
Two-reflecting-surface integrated reflector and coaxial four-reflecting optical system applying same Download PDFInfo
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- CN115826186A CN115826186A CN202211443523.4A CN202211443523A CN115826186A CN 115826186 A CN115826186 A CN 115826186A CN 202211443523 A CN202211443523 A CN 202211443523A CN 115826186 A CN115826186 A CN 115826186A
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Abstract
The invention relates to a reflector with two integrated reflecting surfaces and a coaxial four-reflection optical system applying the reflector. In the coaxial four-reflection optical system, two reflecting surfaces of the two reflecting surface integrated reflecting mirrors are respectively used as a first reflecting mirror surface and a fourth reflecting mirror surface of the optical system; the incident light is firstly reflected to the second reflector through the first reflector surface, the light reflected by the second reflector is incident to the third reflector through the light through hole of the two-reflector-surface integrated reflector, and the light reflected by the third reflector is reflected by the fourth reflector surface and then imaged on the imaging focal plane. The invention adopts the integrated processing design of two reflecting surfaces, reduces the processing and adjusting difficulty, has high standard contact ratio, can effectively compress the axial length of the optical system, and improves the reliability and the environmental adaptability.
Description
Technical Field
The invention relates to the field of optical precision instruments, in particular to a two-reflecting-surface integrated reflector and a coaxial four-reflecting optical system applying the reflector.
Background
The micro optical remote sensor is one of the important directions of the development of the remote sensing load in the field of aerospace at present, and has the characteristics of small volume, light weight and the like. The reflective optical system has the advantages of no chromatic aberration, small volume, light weight and the like, and is widely applied to the space remote sensing system.
Under the condition of a large field of view, the center barrier of the conventional coaxial three-mirror optical system is large, so that the energy entering the system is greatly influenced, and the transfer function and the imaging quality of the system are reduced; off-axis three-mirror optical systems are relatively difficult to process, assemble and adjust and optically detect, and the three-mirror optical systems have limited distortion correcting capability, while the four-mirror optical systems can make up for the technical defect. The invention patent with the publication number of CN 102866B and the name of coaxial four-mirror ultra-low distortion optical system provides a coaxial four-mirror ultra-low distortion optical system, wherein a four mirror with small focal power and large aspheric surface coefficient is introduced on the basis of a coaxial TMA optical system, the four mirror is positioned near the exit pupil of the system, and the system realizes ultra-low distortion by correcting the pupil aberration of the system through the aspheric surface coefficient of the four mirror, but the total length of the system is larger, the three mirror and the four mirror are too far away from a main mirror, the structure is complex and huge, the distance between the four mirrors of the main mirror is far, and the four mirrors of the main mirror can not adopt an integrated structure. The invention patent with the publication number of CN111367066B and the name of 'a coaxial four-reflection optical system' proposes an optical structure form adopting coaxial four-reflection, utilizes the multiple folding of an optical path to reduce the total length of the system, further reduces the tube length focal length ratio of the optical system, and improves the aberration balance capability of the optical system. The invention patent with the publication number of CN111812829B and the name of 'a main three-mirror integrated coaxial four-reflection optical system' adopts four secondary aspheric reflectors, is convenient for correcting astigmatism and field curvature, and inhibits stray light of the system at a first image surface based on a secondary imaging principle, and the common reflector in the system has the same two reflecting surfaces positioned at the same side of a reflector, so that the utilization rate of the reflector is low.
Disclosure of Invention
The invention aims to provide a reflector with two integrated reflecting surfaces, which has high utilization rate of a reflector body.
In order to solve the technical problem, the two-reflecting-surface integrated reflector is characterized in that the two reflecting surfaces are positioned on two sides of the common reflector and are coaxially arranged, and the center of the common reflector is provided with a light through hole.
Furthermore, the reflector is mounted on the back plate through a back three-point flexible support structure.
Furthermore, one side of the common reflector is provided with three mounting holes which are uniformly distributed in the circumferential direction according to 120 degrees, and taper sleeves are fixedly bonded in the mounting holes; the taper sleeve is connected with the back plate through the flexible supporting structure.
Preferably, the bonding surface between the taper sleeve and the mounting hole is a tapered cylindrical surface.
Preferably, the flexible supporting structure is provided with a left flange, a right flange and three flexible supporting sections which are uniformly distributed in the middle circumferential direction at 120 degrees; the flexible supporting structure is fixedly connected with the taper sleeve through a left flange plate and fixedly connected with the back plate through a right flange plate; each flexible supporting section is provided with a flexible stress unloading groove.
Preferably, the flexible stress relief groove is provided with 4 transverse grooves and 2 longitudinal grooves.
Preferably, the middle of the left flange plate and the right flange plate is provided with a light-weight hole.
Preferably, the back plate has a lightweight pore structure.
The back plate is provided with three platform mounting interfaces which are circumferentially distributed and used for being connected with the platform.
The invention also requests to protect a coaxial four-reflection optical system applying the two-reflecting-surface integrated reflector, and the system also comprises a second reflector and a third reflector; the two reflecting surfaces of the two reflecting surface integrated reflecting mirror are respectively used as a first reflecting mirror surface and a fourth reflecting mirror surface of the optical system; the incident light is firstly reflected to the second reflector through the first reflector surface, the light reflected by the second reflector is incident to the third reflector through the light through hole of the two-reflector-surface integrated reflector, and the light reflected by the third reflector is reflected by the fourth reflector surface and then imaged on the imaging focal plane.
Compared with the prior art, the invention has the beneficial effects that:
(1) The two reflecting surfaces of the two-reflecting surface integrated reflecting mirror assembly are integrally processed, so that the processing and adjusting difficulty is reduced, the reference coincidence degree is high, and meanwhile, the axial length of an optical system is effectively compressed, so that the structure is compact.
(2) The two-reflecting-surface integrated reflector component provided by the invention adopts a back three-point supporting mode, an effective flexible supporting structure is designed, on one hand, the reflector surface shape accuracy under a gravity working condition is ensured, on the other hand, the influence on the reflector surface shape when the mounting surface is uneven and the ambient temperature changes can be improved, the component weight is obviously reduced under the same supporting effect, the structure is simple, the supporting is stable, the assembling accuracy is high, the thermal stability and rigidity requirements of the reflector are met, and the remote sensor is ensured to have good imaging quality.
(3) The coaxial four-reflection optical system adopts an integral reflector structure with two reflecting surfaces, so that optical-mechanical structure connecting pieces can be reduced, the reliability is improved, and the problems of complex and large structure, poor environmental adaptability and the like of the coaxial four-reflection optical system are solved; meanwhile, the reflector component has compact structure and strong environment adaptability and is convenient to process, assemble and adjust.
Above-mentioned two plane of reflection integral type speculum adopts back three point support form to design complete effectual flexible structure on flexible bearing structure, guaranteed the reflector surface shape precision under the gravity operating mode on the one hand, on the other hand can improve the installation face and have influence that unevenness, ambient temperature caused when changing to the mirror surface shape, subassembly weight obviously reduces under the equal supporting effect, and simple structure, support stable, assembly accuracy height.
The flexible supporting structure is used as a main part for connecting the back plate and the reflector body, has good dynamic and static mechanical properties and thermal properties, and can ensure that the reflector has a good enough surface shape when the environmental conditions change.
The reflector is used as a core component of the remote sensing load system, and the installation, assembly and positioning accuracy of the reflector directly influences the surface shape of the reflector, so that the imaging quality of the remote sensing load is influenced. The two-reflecting-surface integrated reflector can be applied to a coaxial four-reflecting optical system, can reduce optical-mechanical structure connecting pieces of the system, improves the reliability, and ensures that the system has compact structure and strong environment adaptability and is convenient to process, assemble and adjust.
Drawings
FIG. 1 is a cutaway perspective view of a two-reflecting-surface integral reflector of the present invention;
FIG. 2 is a perspective view of a two-reflecting-surface integral reflector of the present invention;
FIG. 3 is an exploded view of a two reflecting surface integral mirror of the present invention;
FIGS. 4a and 4b are perspective views of the two-reflecting-surface integrated reflector;
5a, 5b are respectively a cutting-away perspective view and an integral perspective view of the taper sleeve;
FIGS. 6a and 6b are perspective views of the flexible support structure;
FIGS. 7a and 7b are perspective views of the back plate structure;
FIG. 8 is a schematic view of a coaxial four-mirror optical system of the present invention.
Description of the reference numerals:
1. a common reflector; 11. a light through hole; 2. a taper sleeve; 3. a flexible support structure; 4. a back plate; 5. and (4) screws. 21. The taper sleeve is connected with the flexible supporting structure; 21 a bottom inner surface; 22. a sidewall outer surface; 31. a left flange plate; 32. a right flange plate; 33. a flexible support section; 331. a flexible stress relief groove; 41. a back plate and platform mounting interface; 42. the back plate is mounted on the flexible supporting structure.
61. A second reflector; 62. two reflecting surface integral reflectors; 621. a first mirror surface; 622. a fourth mirror surface; 63. a third reflector; 64. and imaging the focal plane.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments described herein are illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be specifically understood in specific cases by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," or "beneath" a second feature includes the first feature being directly under or obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1-3, the two-reflecting-surface integral reflector of the present invention comprises a common reflector 1 and a back plate 4; the reflector 1 is mounted on a back plate 4 through a back three-point flexible support structure 3.
As shown in fig. 4, the common reflector 1 has two reflecting surfaces, the two reflecting surfaces are integrally machined and coaxially arranged, the two reflecting surfaces are located at two sides of the common reflector, and the center of the common reflector is provided with a light through hole 11. The back plate 4 has a lightweight hole structure.
One side of the reflector 1 is provided with three mounting holes which are uniformly distributed in the circumferential direction at 120 degrees, and taper sleeves 2 are fixedly bonded in the mounting holes by using an adhesive.
Preferably, the taper sleeve 2 is a cylinder with an opening on one side, and the outer surface 22 of the side wall of the taper sleeve is a tapered cylindrical surface which is an adhesive surface between the taper sleeve and the mounting hole.
The inner surface 21 of the bottom of the taper sleeve 2 is a connecting surface of the taper sleeve and the flexible supporting structure 3, and a threaded hole is formed in the bottom of the taper sleeve.
Taking a flexible supporting structure at one point of the back as an example, the flexible supporting structure is provided with a left flange 31, a right flange 32 and three flexible supporting joints 33 which are uniformly distributed at 120 degrees in the middle circumferential direction; lightweight holes are formed in the middle of the left flange plate 31 and the right flange plate 32; each flexible support section 33 has a flexible stress relief groove 331 therein, the flexible stress relief groove 331 has 4 transverse grooves and 2 longitudinal grooves, and the groove width is determined by the flexibility of the flexible support structure. The flexible supporting structure can effectively unload other stresses and strains from the axial direction, the circumferential direction and the radial direction and from two rotating directions, reduce the mirror surface deformation of the reflector caused by external environment changes (such as gravity release, heat radiation, temperature change, assembly errors and the like), and powerfully ensure that the reflector has the requirement of ultrahigh surface shape.
The flexible supporting structure 3 is fixedly connected with the taper sleeve 2 through a left flange plate 31 and screws, and is fixedly connected with the back plate 4 through a right flange plate 32 and screws.
The back plate 4 is designed with three circumferentially distributed back plate and platform mounting interfaces 41 and a back plate and flexible support structure mounting surface 42.
Above-mentioned two plane of reflection integral type speculum adopts back three point support form to design complete effectual flexible structure on flexible bearing structure, guaranteed the reflector surface shape precision under the gravity operating mode on the one hand, on the other hand can improve the installation face and have influence that unevenness, ambient temperature caused when changing to the mirror surface shape, subassembly weight obviously reduces under the equal supporting effect, and simple structure, support stable, assembly accuracy height.
The flexible supporting structure is used as a main part for connecting the back plate and the reflector body, has good dynamic and static mechanical properties and thermal properties, and can ensure that the reflector has a good enough surface shape when environmental conditions change.
The reflector is used as a core component of the remote sensing load system, and the installation, assembly and positioning accuracy of the reflector directly influences the surface shape of the reflector, so that the imaging quality of the remote sensing load is influenced. The reflector with the two integrated reflecting surfaces can be applied to a coaxial four-reflection optical system, optical mechanical structure connecting pieces of the system can be reduced, the reliability is improved, and the system is compact in structure, strong in environmental adaptability and convenient to process, assemble and adjust.
As shown in fig. 8, the coaxial four-mirror optical system using the two-mirror integrated mirror further includes a second mirror 61 and a third mirror 63; the two reflecting surfaces of the two-reflecting-surface integrated mirror 62 are respectively used as a first reflecting mirror surface 621 and a fourth reflecting mirror surface 622 of the optical system; the incident light is firstly reflected to the second reflector 61 through the first reflector 621, the light reflected by the second reflector 61 is incident to the third reflector 63 through the light-passing hole 44 of the two-reflector integrated reflector, and the light reflected by the third reflector 63 is reflected by the fourth reflector 622 and then imaged on the imaging focal plane 64.
The above specific examples are further illustrative of the technical solutions provided by the present invention, but should not be construed as limiting the present invention.
Claims (10)
1. The two-reflecting-surface integrated reflector is characterized in that the two reflecting surfaces are positioned on two sides of a common reflector and are coaxially arranged, and the center of the common reflector is provided with a light through hole (11).
2. A two reflecting surface integral reflector according to claim 1, characterized in that said integral reflector (1) is mounted on the back plate (4) by a back three-point flexible support structure (3).
3. The reflector of claim 2, wherein one side of the reflector (1) has three mounting holes uniformly distributed at 120 ° in the circumferential direction, and taper sleeves (2) are fixed in the mounting holes; the taper sleeve (2) is connected with the back plate (4) through the flexible supporting structure (3).
4. The reflector as claimed in claim 3, wherein the bonding surface between the cone sleeve (2) and the mounting hole is a tapered cylinder.
5. A two-reflecting-surface integral reflector according to claim 3, wherein said flexible supporting structure has an integral left flange (31), right flange (32) and three flexible supporting segments (33) uniformly distributed at 120 ° in the middle circumference; the flexible supporting structure (3) is fixedly connected with the taper sleeve (2) through a left flange plate (31) and is fixedly connected with the back plate (4) through a right flange plate (32); each flexible support joint (33) is provided with a flexible stress relief groove (331).
6. The two-reflecting-surface one-piece mirror according to claim 5, wherein the flexible stress relief groove (331) has 4 transverse grooves and 2 longitudinal grooves.
7. The reflector of claim 5, wherein the flange (31) is provided with a light-weight hole at the center thereof, and the flange (32) is provided with a light-weight hole at the center thereof.
8. A two-reflecting-surface integral reflector according to claim 2, characterized in that said back plate (4) has a lightweight hole structure.
9. A two reflecting surface integral reflector according to claim 2, characterized in that the back plate (4) is provided with three circumferentially distributed platform mounting interfaces (41) for connection with a platform.
10. A coaxial four-mirror optical system using the reflector-surface-integrated type reflector according to claim 1, further comprising a second reflector (61), a third reflector (63); two reflecting surfaces of the two-reflecting-surface integrated reflecting mirror (62) are respectively used as a first reflecting mirror surface (621) and a fourth reflecting mirror surface (622) of the optical system; incident light is firstly reflected to the second reflector (61) through the first reflector (621), light reflected by the second reflector (61) is incident to the third reflector (63) through the light through hole (44) of the two-reflector integrated reflector, and light reflected by the third reflector (63) is reflected by the fourth reflector (622) and then imaged on the imaging focal plane (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211443523.4A CN115826186A (en) | 2022-11-18 | 2022-11-18 | Two-reflecting-surface integrated reflector and coaxial four-reflecting optical system applying same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211443523.4A CN115826186A (en) | 2022-11-18 | 2022-11-18 | Two-reflecting-surface integrated reflector and coaxial four-reflecting optical system applying same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539283A (en) * | 2023-07-06 | 2023-08-04 | 长春通视光电技术股份有限公司 | Double-reflecting-surface composite mirror optical axis deviation detection system and detection method |
| CN116699927A (en) * | 2023-08-07 | 2023-09-05 | 中国科学院长春光学精密机械与物理研究所 | Remote sensing camera with integrated silicon carbide main mirror and substrate |
-
2022
- 2022-11-18 CN CN202211443523.4A patent/CN115826186A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539283A (en) * | 2023-07-06 | 2023-08-04 | 长春通视光电技术股份有限公司 | Double-reflecting-surface composite mirror optical axis deviation detection system and detection method |
| CN116539283B (en) * | 2023-07-06 | 2023-09-12 | 长春通视光电技术股份有限公司 | Double-reflecting-surface composite mirror optical axis deviation detection system and detection method |
| CN116699927A (en) * | 2023-08-07 | 2023-09-05 | 中国科学院长春光学精密机械与物理研究所 | Remote sensing camera with integrated silicon carbide main mirror and substrate |
| CN116699927B (en) * | 2023-08-07 | 2023-11-03 | 中国科学院长春光学精密机械与物理研究所 | Remote sensing camera with integrated silicon carbide main mirror and substrate |
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