CN213814103U - Ultra-light low-centroid reflector flexible supporting structure of micro space remote sensor - Google Patents
Ultra-light low-centroid reflector flexible supporting structure of micro space remote sensor Download PDFInfo
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- CN213814103U CN213814103U CN202022383338.3U CN202022383338U CN213814103U CN 213814103 U CN213814103 U CN 213814103U CN 202022383338 U CN202022383338 U CN 202022383338U CN 213814103 U CN213814103 U CN 213814103U
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Abstract
The utility model relates to a flexible bearing structure of miniature space remote sensor ultralight low quality heart speculum. The utility model aims at solving the small-bore ultralight low barycenter speculum flexible bearing structure of current miniature space remote sensor and having centre of gyration and speculum barycenter to coincide, produce great moment, and then seriously influence the technical problem of speculum shape of face, provide a miniature space remote sensor ultralight low barycenter speculum flexible bearing structure. The flexible supporting structure is provided with three flexible supporting units which are uniformly distributed in a 120-degree circumference, each flexible supporting unit is provided with a flexible assembly, the extension lines of the central axes of the three flexible assemblies are intersected at one point, namely the common rotary central point of the flexible supporting structure, the intersection point is coincided with the mass center O of the ultralight reflector, the flexible assemblies are elastically deformed through the flexible assemblies, the deformation difference between the reflector and a bearing structure is coordinated, the reflector is prevented from generating internal stress, and the surface shape precision requirement of the reflector is reduced.
Description
Technical Field
The utility model relates to a miniature space remote sensor speculum bearing structure, concretely relates to miniature space remote sensor ultralight low quality heart speculum flexible support structure.
Background
The micro space remote sensor has important scientific significance and economic value in the aspects of providing a distributed high-resolution space remote sensing image, greatly reducing the satellite load, improving the long-term stability of the load, improving the environmental adaptability and the like. The optical reflector is a core component of the optical system of the miniature remote sensor, and the installation and positioning accuracy of the optical reflector directly influences the imaging quality of the optical system. Because the micro remote sensor has strict requirements on weight, the optical reflector of the remote sensor needs to be designed to be ultra-light, so that the absolute rigidity of the reflector is reduced, and meanwhile, the centroid of the reflector is very close to the mirror surface of the reflector, so that the ultra-light low-mass reflector is formed. Therefore, the support structure of the micro remote sensor has good dynamic and static mechanical properties to meet the support stability required by the ultra-light low-mass-center reflector and have certain flexibility to improve the thermal stability of the reflector, and meanwhile, the flexible rotation center of the flexible support structure is required to be overlapped with the mass center of the reflector as much as possible, so that the influence on the surface shape of the reflector due to misalignment of the mass center is reduced or even eliminated.
The rotation characteristic of the supporting structure has great influence on the stress state of the reflector, and the surface shape precision of the reflector is very sensitive to the position of the rotation center. The flexible supporting structure generally has flexibility in the radial direction, under the condition that the axial direction is relatively rigid and the positions of the reflector structure and the supporting hole are determined, the supporting structure is similar to rigidity under the working condition of axial gravity, and at the moment, the flexible structure parameters have no influence on the stress state of the reflector under the working condition of axial gravity. However, when the mirror assembly is subjected to a radial gravitational force, the flexible structure may be considered as a mechanical hinge with springs, in which case the support structure provides not only a radial counter-force but also a moment to counterbalance the gravitational force if the centre of rotation of the flexible structure is not in the plane of the mirror's centroid. However, the axial dimension of the reflector is much smaller than the radial dimension, the bending resistance is very poor, and the moment action of the supporting structure is very likely to cause the deformation of the reflector. For an ultrathin reflector (an ultralight low-mass-center reflector), the centroid position of the ultrathin reflector is close to the mirror surface, and the rotation center of a general flexible support has a larger potential difference with the centroid of the reflector in the axial direction, so that the surface shape of the reflector is seriously influenced.
Usually, the back flexible supporting structure of the space reflector is connected with the reflector through a taper sleeve so as to improve the influence of temperature change on the surface shape precision of the optical reflector. For a small-caliber reflector with the caliber smaller than 300mm, the weight of the reflector component is increased by additionally arranging the taper sleeve, the structure is over compact, and the assembly difficulty is increased. Therefore, the flexible supporting structure of the space reflector is generally slotted on the cylindrical rigid supporting structure to realize flexible transition, and the flexible direction is increased through a plurality of slots. However, for smaller aperture lightweight mirrors, it is difficult to arrange such support structures in a limited space to achieve the desired flexibility requirements.
Disclosure of Invention
The utility model aims at solving the small-bore ultralight low barycenter speculum flexible bearing structure of current miniature space remote sensor and having centre of gyration and speculum barycenter to coincide, produce great moment, and then seriously influence the speculum shape of face to and hardly arrange bearing structure's technical problem in finite space, provide a miniature space remote sensor ultralight low barycenter speculum flexible bearing structure.
In order to solve the technical problem, the utility model provides a technical solution as follows:
the utility model provides a flexible bearing structure of miniature space remote sensor ultralight low quality heart speculum, including speculum support housing, speculum support housing openly shape with treat support speculum looks adaptation, its special character lies in: the reflector support shell is provided with three reflector support hole structures which are uniformly arranged on the same circumference of the back of the reflector support shell, and three integrated flexible support units;
each flexible supporting unit comprises a reflector bonding conical ring, a cross supporting structure, a flexible assembly and a substrate mounting table;
the reflector bonding taper ring is matched with a supporting hole on the reflector supporting hole structure, and the axes of the reflector bonding taper ring and the supporting hole structure are coincident and have the same taper;
the cross supporting structure is positioned in the reflector bonding conical ring, and the edge of the cross supporting structure is connected with the reflector bonding conical ring;
the flexible assembly is connected between the cross support structure and the substrate mounting table;
the included angles between the extension lines of the central axes of the three flexible assemblies and the optical axis of the reflector to be supported are equal, and the central axes of the three flexible assemblies penetrate through the centroid O of the reflector to be supported;
and the substrate mounting table is provided with a connecting threaded hole for connecting a mechanical interface of the bearing structure substrate of the micro space remote sensor.
Further, the flexure assembly includes a first flexure web, a second flexure web, and a transitional coupling structure for coupling the first flexure web and the second flexure web;
the first flexible sheet is vertical to the surface of the substrate mounting table;
the first flexible sheet and the second flexible sheet are perpendicular to each other and the central axes of the first flexible sheet and the second flexible sheet coincide with each other.
Further, in order to make the deformation amount of the flexible supporting unit and the deformation amount of the mirror to be supported close, and to realize good support, the expansion coefficients of the flexible supporting unit and the mirror to be supported are equal.
Furthermore, in order to realize convenient and reliable connection, the reflector bonding conical ring and the reflector supporting hole structure are fixed through bonding.
Furthermore, in order to ensure the accurate connection position, the substrate mounting table is also provided with a positioning pin hole, and a positioning pin for positioning the micro space remote sensor bearing structure substrate is arranged in the positioning pin hole
Further, in order to guarantee that the integral strength of the reflector supporting shell meets the requirement of light weight, a reinforcing rib is further arranged on the back face of the reflector supporting shell, the thickness of the reinforcing rib is equal to the thickness of the mirror surface of the reflector to be supported, and the reinforcing rib is of a triangular structure.
Further, for convenience of processing and assembly, the integrated flexible supporting unit is processed by invar alloy materials.
Further, the mirror support housing has a front face with an inner diameter of 80-400mm for fitting the mirror to be supported.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model provides a flexible bearing structure of miniature space remote sensor ultralight low quality center reflector, the three flexible supporting unit that is 120 circumference equipartitions has, every flexible supporting unit has flexible assembly, three flexible assembly's the central axis is handed in a bit, be flexible supporting structure common centre of gyration point promptly, should intersect and ultralight low quality center reflector barycenter O coincidence, flexible assembly passes through the elastic deformation of self, coordinate the deformation difference between reflector and the load structure, avoid the reflector to produce internal stress, reduce the shape of face precision of reflector, fundamentally has solved the influence of the bending moment that ultralight low quality center reflector barycenter O and flexible support centre of gyration do not coincide and arouse to the shape of face precision of mirror face.
2. The utility model provides an among the flexible bearing structure of miniature space remote sensor ultralight low quality heart speculum, first flexible piece in every flexible support unit mainly provides radial flexibility, and the flexible piece of second mainly provides axial flexibility, and first flexible piece and flexible piece of second (two inclined plane flexible pieces) form the flexible hook hinge of spring leaf formula jointly, can uninstall effectively and come from outside heat load and stress, meet an emergency.
3. The flexible supporting structure of the ultralight low-mass-center reflector is directly bonded with the ultralight reflector, so that the size of the flexible supporting structure is reduced, the weight of the supporting structure is reduced, and the overall structure of the ultralight reflector is simplified.
4. For ultralight and low-mass-center reflectors with different weights, the coincidence of the reflector centroid O and the flexible support rotation center can be realized by adjusting the included angle between the central axis of the inclined flexible sheet and the reflector optical axis.
5. For small-sized ultralight reflectors with different weights and different light-weight forms, good surface shape precision can be guaranteed by adjusting the length, the width and the thickness of the flexible sheet.
6. The ultra-light low-centroid reflector flexible supporting structure is made of invar steel materials, the influence of environmental temperature change on reflector surface shape precision is improved through the characteristics of small expansion coefficient and extremely small temperature deformation of the invar steel materials, and the support structure is the best material for manufacturing parts with strict requirements on temperature deformation.
7. Adopt the utility model provides a when miniature space remote sensor ultralight low barycenter speculum flexible support structure assembles, can guarantee that the speculum changes at the direction of operation, operational environment temperature change and when having assembly error, the shape of face precision of speculum remains stable at the allowed band.
Drawings
Fig. 1 is a bottom view of an embodiment of the present invention;
fig. 2 is a front view of an embodiment of the present invention;
fig. 3 is a cross-sectional view of an embodiment of the present invention;
FIG. 4 is a perspective view of an integrated flexible support unit according to an embodiment of the present invention;
FIG. 5 is a front view of an integrated flexible support unit according to an embodiment of the present invention;
FIG. 6 is a top view of an integrated flexible support unit according to an embodiment of the present invention;
description of reference numerals:
the reflector comprises a 1-reflector supporting shell, 11-reinforcing ribs, a 2-reflector supporting hole structure, a 3-flexible supporting unit, a 31-reflector bonding conical ring, a 32-cross supporting structure, a 33-flexible assembly, 331-first flexible sheet, 332-second flexible sheet, 333-transition connecting structure, 34-substrate mounting table and 341-connecting threaded holes.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
The ultra-light low-mass core reflector flexible supporting structure of the micro space remote sensor comprises a reflector supporting shell 1, wherein the shape of the front surface of the reflector supporting shell 1 is matched with a reflector to be supported, the inner diameter of the front surface of the reflector supporting shell 1 is 80-400mm, the inner diameter is equal to the outer diameter of the ultra-light low-mass core reflector, the micro space remote sensor further comprises three reflector supporting hole structures 2 (provided with three supporting holes uniformly distributed in a 120-degree circumference manner) uniformly arranged on the same circumference of the back surface of the reflector supporting shell 1 and three integrated flexible supporting units 3; each flexible supporting unit 3 comprises a reflector bonding cone ring 31, a cross supporting structure 32, a flexible assembly 33 and a substrate mounting table 34; the reflector bonding taper ring 31 is matched with the support hole on the reflector support hole structure 2, and the axes of the reflector bonding taper ring and the support hole are coincident and have the same taper; the cross-shaped support structure 32 is positioned in the reflector bonding conical ring 31, and the edge of the cross-shaped support structure 32 is connected with the reflector bonding conical ring 31; the flexible assembly 33 is connected between the cross support structure 32 and the substrate mounting table 34, and includes a first flexible sheet 331, a second flexible sheet 332, and a transition connection structure 333 for connecting the first flexible sheet 331 and the second flexible sheet 332; the first flexible sheet 331 is perpendicular to the surface of the substrate mounting table 34; the first flexible sheet 331 and the second flexible sheet 332 are perpendicular to each other and have central axes coincident with each other; the included angles between the central axes of the three flexible assemblies 33 and the optical axis of the reflector to be supported are equal, and the extension lines of the central axes of the three flexible assemblies 33 pass through the centroid O of the reflector to be supported; and a threaded hole for connecting a mechanical interface of the bearing structure substrate of the micro space remote sensor is formed in the substrate mounting table 34.
The flexible supporting unit 3 matches (equals) the expansion coefficient of the mirror to be supported. The reflector bonding conical ring 31 and the reflector supporting hole structure 2 are fixed through glue joint. The base plate mounting table 34 is further provided with 2 positioning pin holes, and positioning pins for positioning the base plate of the force bearing structure of the micro space remote sensor are arranged in the positioning pin holes. The reflector supporting shell 1 is also provided with a reinforcing rib 11 on the back, the thickness of the reinforcing rib 11 is equal to the thickness (2mm) of the reflector surface to be supported, and the reinforcing rib 11 is of a triangular lightweight structure. The integrated flexible supporting unit 3 is made of invar alloy materials.
An assembling method based on the ultra-light low-mass core reflector flexible supporting structure of the micro space remote sensor comprises the following steps:
1) a supporting hole on the reflector supporting hole structure 2 is used for grinding and processing a reflector bonding conical ring 31, so that the conicity of the reflector bonding conical ring and the conicity of the reflector supporting hole structure are equal, and the tolerance meets the requirement;
2) installing the mirror bonding conical ring 31 which is well ground and processed into a supporting hole on the mirror supporting hole structure 2, and fixing by gluing;
3) integrally grinding the substrate mounting tables 34 of the three flexible supporting units 3 to enable the connecting surfaces to be in the same plane, wherein the flatness meets the tolerance requirement;
4) and connecting the flexible supporting structure which is well glued and fixed to a mechanical interface of the force bearing structure substrate of the micro space remote sensor through a screw and a pin.
The flexible supporting structure of the ultra-light low-mass core reflector of the micro space remote sensor utilizes the bending elastic deformation of the first flexible sheet 331 and the second flexible sheet 332 (two inclined flexible sheets), so that a small displacement can be generated between the reflector bonding cone ring 31 of the flexible supporting unit 3 and the substrate mounting table 34, and the flexible supporting structure is used for weakening the internal stress of the ultra-light low-mass core reflector caused by temperature change and assembly error. The central axis of the inclined flexible sheet is intersected at one point, and the size of an included angle formed by the central axis of the first flexible sheet 331 and the central axis of the second flexible sheet 332 and the optical axis of the ultralight low-quality center reflector is adjusted through design, so that the intersection point is overlapped with the mass center O of the ultralight low-quality center reflector, the mirror surface deformation caused by the gravity moment balance of the reflector is reduced and eliminated, and the surface shape precision of the reflector is ensured. The three flexible supporting units 3 are respectively connected with the mechanical interface of the micro space optical remote sensor force bearing structure substrate through 4 connecting threaded holes 341 on the corresponding substrate mounting table 34. The three flexible supporting units 3 are all of an integrated structure, and reliability and stability of a supporting effect are guaranteed.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to equally replace some technical features of the embodiments, and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (8)
1. The utility model provides a flexible bearing structure of miniature space remote sensor ultralight low-mass center speculum, includes speculum support casing (1), speculum support casing (1) front shape with treat support speculum looks adaptation, its characterized in that: the reflector supporting device also comprises three reflector supporting hole structures (2) which are uniformly arranged on the same circumference of the back of the reflector supporting shell (1) and three integrated flexible supporting units (3);
each flexible supporting unit (3) comprises a reflector bonding conical ring (31), a cross supporting structure (32), a flexible assembly (33) and a substrate mounting table (34);
the reflector bonding conical ring (31) is matched with a supporting hole on the reflector supporting hole structure (2), the axes of the reflector bonding conical ring and the supporting hole are coincident, and the conicity of the reflector bonding conical ring and the axis of the reflector supporting hole structure are equal;
the cross support structure (32) is positioned in the reflector bonding conical ring (31), and the edge of the cross support structure (32) is connected with the reflector bonding conical ring (31);
the flexible assembly (33) is connected between the cross support structure (32) and the substrate mounting table (34);
the included angles between the central axes of the three flexible assemblies (33) and the optical axis of the reflector to be supported are equal, and the extension lines of the central axes of the three flexible assemblies (33) penetrate through the centroid O of the reflector to be supported;
and a connection threaded hole (341) for connecting a mechanical interface of the bearing structure substrate of the micro space remote sensor is formed in the substrate mounting table (34).
2. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 1, characterized in that: the flexible assembly (33) comprises a first flexible sheet (331), a second flexible sheet (332) and a transitional connecting structure (333) for connecting the first flexible sheet (331) and the second flexible sheet (332);
the first flexible sheet (331) is perpendicular to the surface of the substrate mounting table (34);
the first flexible sheet (331) and the second flexible sheet (332) are perpendicular to each other and have their central axes coincident with each other.
3. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 1 or 2, characterized in that: the expansion coefficients of the flexible supporting unit (3) and the reflector to be supported are equal.
4. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 3, wherein: the reflector bonding conical ring (31) and the reflector supporting hole structure (2) are fixed through gluing.
5. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 4, wherein: and the substrate mounting table (34) is also provided with a positioning pin hole, and a positioning pin for positioning the substrate of the force bearing structure of the micro space remote sensor is arranged in the positioning pin hole.
6. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 5, characterized in that: the reflector supporting shell (1) is characterized in that a reinforcing rib (11) is further arranged on the back face of the reflector supporting shell (1), the thickness of the reinforcing rib (11) is equal to the thickness of the mirror face of the reflector to be supported, and the reinforcing rib (11) is of a triangular structure.
7. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 6, characterized in that: the integrated flexible supporting unit (3) is made of an invar steel alloy material.
8. The micro space remote sensor ultra-light low-mass core reflector flexible support structure of claim 7, wherein: the inner diameter of the front surface of the reflector supporting shell (1) is 80-400 mm.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112394472A (en) * | 2020-10-23 | 2021-02-23 | 中国科学院西安光学精密机械研究所 | Flexible supporting structure of ultra-light low-centroid reflector of micro space remote sensor and assembling method |
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- 2020-10-23 CN CN202022383338.3U patent/CN213814103U/en not_active Withdrawn - After Issue
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112394472A (en) * | 2020-10-23 | 2021-02-23 | 中国科学院西安光学精密机械研究所 | Flexible supporting structure of ultra-light low-centroid reflector of micro space remote sensor and assembling method |
CN112394472B (en) * | 2020-10-23 | 2023-12-08 | 中国科学院西安光学精密机械研究所 | Flexible supporting structure of ultra-light low-mass-center reflecting mirror of miniature space remote sensor and assembling method |
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