CN219625791U - Heat-eliminating off-axis reflective collimator and optical-mechanical system - Google Patents
Heat-eliminating off-axis reflective collimator and optical-mechanical system Download PDFInfo
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- CN219625791U CN219625791U CN202321275357.1U CN202321275357U CN219625791U CN 219625791 U CN219625791 U CN 219625791U CN 202321275357 U CN202321275357 U CN 202321275357U CN 219625791 U CN219625791 U CN 219625791U
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Abstract
The utility model relates to an athermal off-axis reflective collimator and an optical-mechanical system, which comprise a box body, wherein the box body comprises a vertical plate; the main mirror mechanism comprises a main mirror support and a main mirror, wherein the main mirror support is connected to the vertical plate through a plurality of bipod structures, and the main mirror is arranged on the main mirror support; the support leg mechanism comprises a plurality of support legs, and the support legs are connected with the main mirror support piece; the folding mirror mechanism comprises a folding mirror supporting piece and a folding mirror, wherein the folding mirror supporting piece is connected with the supporting legs, and the folding mirror is arranged on the folding mirror supporting piece; the secondary mirror mechanism comprises a secondary mirror supporting piece and a secondary mirror, wherein the secondary mirror supporting piece is connected to the supporting leg, and the secondary mirror is arranged on the secondary mirror supporting piece. The flexible bipod structure can reduce the influence of thermal deformation of the box body on the position and the shape of the main mirror when the temperature changes, and meanwhile, the supporting leg mechanism can enable the relative positions and the relative postures of the main mirror mechanism, the fold mirror mechanism and the secondary mirror mechanism to be basically unchanged at different temperatures, so that the light-emitting parallelism of the off-axis reflective collimator is improved.
Description
Technical Field
The utility model relates to the technical field of optical-mechanical systems, in particular to an athermal off-axis reflective collimator and an optical-mechanical system.
Background
The off-axis reflection type collimator is generally composed of a main mirror, a folding mirror and a secondary mirror, the distance between the main mirror, the folding mirror and the secondary mirror and the change of the relative position can greatly influence the light-emitting parallelism of the collimator, and in order to ensure the stability of the light-emitting parallelism of the instrument at different temperatures, the distance between the main mirror, the folding mirror and the secondary mirror and the change of the relative position at different temperatures need to be controlled within a very small range;
the existing off-axis reflection type optical-mechanical system is characterized in that a main mirror, a folding mirror and a secondary mirror are installed on a bottom plate made of the same invar steel material, the invar steel bottom plate is fixed on an aluminum alloy bottom plate by adopting a bipod structure (flexible supporting structure), the distance between the main mirror and the secondary mirror is larger, the required invar steel bottom plate is longer, the cost is higher, and the invar steel is higher in density, so that the whole optical-mechanical system is heavier in quality and inconvenient to transport and install; meanwhile, as the span of the invar base plate is larger, when the temperature fluctuation is larger, the bimetal effect between the aluminum alloy base plate and the invar base plate is obvious, the invar base plate is easy to bend, and the deviation of the relative position and the space posture among the main mirror, the fold mirror and the secondary mirror is caused, so that the light-emitting parallelism of the collimator is difficult to ensure.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome that the off-axis reflection type optical mechanical system in the prior art mostly installs a main mirror, a folding mirror and a secondary mirror on a bottom plate made of the same invar steel material, the invar steel bottom plate is fixed on an aluminum alloy bottom plate by adopting a bipod structure (flexible supporting structure), the required invar steel bottom plate is longer in length and higher in cost due to larger distance between the main mirror and the secondary mirror, and the invar steel is heavier in quality and inconvenient to transport and install due to larger density of the invar steel; meanwhile, as the span of the invar base plate is larger, when the temperature fluctuation is larger, the bimetal effect between the aluminum alloy base plate and the invar base plate is obvious, the invar base plate is easy to bend, and the relative position and the space posture among the main mirror, the fold mirror and the secondary mirror are caused to deviate, so that the light-emitting parallelism of the collimator is difficult to guarantee.
In order to solve the technical problems, the utility model provides an off-axis reflection collimator for removing heat, which comprises,
the box body comprises a vertical plate;
the main mirror mechanism comprises a main mirror support and a main mirror, the main mirror support is connected to the vertical plate through a plurality of bipod structures, and the main mirror is arranged on the main mirror support;
the support leg mechanism comprises a plurality of support legs which are arranged in parallel, and the support legs are connected with the main mirror support piece;
the folding mirror mechanism comprises a folding mirror supporting piece and a folding mirror, wherein the folding mirror supporting piece is connected with the supporting legs, and the folding mirror is arranged on the folding mirror supporting piece;
the secondary mirror mechanism comprises a secondary mirror supporting piece and a secondary mirror, wherein the secondary mirror supporting piece is connected to the supporting leg, and the secondary mirror is arranged on the secondary mirror supporting piece.
In one embodiment of the utility model, the main mirror support comprises a bracket and a main mirror fixing seat, wherein the bracket is vertically connected to the vertical plate through three groups of bipod structures which are arranged in a triangle shape, and a connecting block is arranged on the main mirror fixing seat and is connected with the bracket.
In one embodiment of the utility model, the main mirror fixing seat is of a groove structure, the groove of the main mirror fixing seat corresponds to the shape of the main mirror, and the main mirror is glued in the groove of the main mirror fixing seat.
In one embodiment of the utility model, the supporting legs comprise a frame structure in a right-angle trapezoid shape, a plurality of rib plates parallel to the bottom edges of the frame structure are arranged between two waists of the frame structure at intervals, and the lower bottom edges of the frame structure are connected with the bracket.
In one embodiment of the utility model, the secondary mirror support comprises a mounting bracket and a secondary mirror support, the mounting bracket is connected to one end of the support leg away from the primary mirror support, the secondary mirror support is arranged on the mounting bracket, and the secondary mirror is arranged on the secondary mirror support.
In one embodiment of the utility model, the secondary mirror support is of an annular structure, and the inner hole of the secondary mirror support is a stepped hole, and the secondary mirror is glued in the stepped hole.
In one embodiment of the utility model, the box comprises a bottom plate, the vertical plate is vertically arranged on the bottom plate, and the supporting legs extend parallel to the bottom plate and have a gap with the bottom plate.
In one embodiment of the present utility model, the support legs are made of invar.
In one embodiment of the present utility model, the vertical plate is made of aluminum alloy.
An optical-mechanical system comprising the athermal off-axis reflective collimator of any of the preceding claims.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
the utility model relates to a heat-removing off-axis reflective collimator and an optical mechanical system, wherein the collimator comprises a box body, a main mirror mechanism, a supporting leg mechanism, a fold mirror mechanism and a secondary mirror mechanism, wherein the main mirror mechanism is connected to a vertical plate of the box body through a bipod structure, the supporting leg mechanism is a cantilever structure connected with the main mirror mechanism, and the fold mirror mechanism and the secondary mirror mechanism are connected with the main mirror mechanism through the supporting leg mechanism; the flexible bipod structure can eliminate or reduce the influence of thermal deformation of the box body on the position and the shape of the main mirror mechanism when the temperature changes, so that the light-emitting parallelism of the off-axis reflective collimator at different temperatures is ensured; meanwhile, the supporting leg mechanism can enable the relative positions of the main mirror mechanism, the fold mirror mechanism and the secondary mirror mechanism to be basically unchanged at different temperatures, so that the stability of the relative positions and the relative postures among the main mirror, the fold mirror and the secondary mirror during temperature change is further ensured, and the light-emitting parallelism of the off-axis reflection collimator is improved; the heat-eliminating off-axis reflection type collimator has the advantages of simple structure, convenient installation and maintenance and suitability for practical use.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a perspective view of an athermal off-axis reflective collimator according to a preferred embodiment of the present utility model;
FIG. 2 is a schematic view showing the structure of a first view angle of the internal structure of the athermal off-axis reflective collimator according to the preferred embodiment of the present utility model;
FIG. 3 is a schematic view showing the structure of a second view angle of the internal structure of the athermal off-axis reflective collimator according to the preferred embodiment of the present utility model;
FIG. 4 is a schematic structural view of a primary mirror support and a secondary mirror support of an athermal off-axis reflective collimator according to a preferred embodiment of the present utility model;
fig. 5 is a schematic structural view of a support leg of an athermal off-axis reflective collimator according to a preferred embodiment of the present utility model.
Description of the specification reference numerals: 1. a case; 11. a vertical plate; 2. a main mirror mechanism; 21. a main mirror support; 211. a bracket; 212. a main mirror fixing seat; 22. a primary mirror; 23. bipod structure; 3. a support leg mechanism; 31. support legs; 311. a frame structure; 312. rib plates; 4. a fold mirror mechanism; 41. a fold mirror support; 42. a fold mirror; 5. a secondary mirror mechanism; 51. a secondary mirror support; 511. a mounting frame; 512. a secondary mirror support; 52. a secondary mirror.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Example 1
Referring to fig. 1 to 5, an athermal off-axis reflective collimator of the present utility model includes,
the box body 1, the box body 1 comprises a vertical plate 11;
the main mirror mechanism 2, the main mirror mechanism 2 comprises a main mirror support 21 and a main mirror 22, the main mirror support 21 is connected to the vertical plate 11 through a plurality of bipod structures 23, and the main mirror 22 is arranged on the main mirror support 21;
the support leg mechanism 3, the support leg mechanism 3 includes a plurality of support legs 31 arranged in parallel, the support legs 31 are connected with the main mirror support 21;
the folding mirror mechanism 4, the folding mirror mechanism 4 comprises a folding mirror supporting piece 41 and a folding mirror 42, the folding mirror supporting piece 41 is connected with the supporting leg 31, and the folding mirror 42 is arranged on the folding mirror supporting piece 41;
the secondary mirror mechanism 5, the secondary mirror mechanism 5 includes a secondary mirror support 51 and a secondary mirror 52, the secondary mirror support 51 is connected to the support leg 31, and the secondary mirror 52 is disposed on the secondary mirror support 51.
Specifically, the main mirror mechanism 2, the fold mirror mechanism 4 and the secondary mirror mechanism 5 are all arranged in the box body 1, wherein the main mirror mechanism 2 comprises a main mirror support piece 21 and a main mirror 22, the main mirror support piece 21 is connected to the vertical plate 11 of the box body 1 through a plurality of bipod structures 23, and the flexible bipod structures 23 can eliminate or reduce the influence of the thermal deformation of the box body 1 on the position and the shape of the main mirror mechanism 2 when the temperature changes, so that the light-emitting parallelism of the off-axis reflective collimator at different temperatures is ensured; simultaneously, the cantilever type supporting leg mechanism 3 is arranged, the supporting leg mechanism 3 comprises a plurality of supporting legs 31 connected with the main mirror supporting piece 21, the supporting legs 31 are suspended, the folding mirror mechanism 4 and the secondary mirror mechanism 5 are connected to the supporting legs 31, the relative positions of the main mirror mechanism 2, the folding mirror mechanism 4 and the secondary mirror mechanism 5 at different temperatures can be kept basically unchanged through the supporting leg 31 structure, the stability of the relative positions and the relative postures among the main mirror 22, the folding mirror 42 and the secondary mirror 52 during temperature change is further ensured, and the light-emitting parallelism of the off-axis reflection type collimator is improved.
Referring to fig. 2 to 4, further, the main mirror support 21 includes a bracket 211 and a main mirror fixing base 212, the bracket 211 is vertically connected to the vertical plate 11 through three sets of bipod structures 23 arranged in a triangle shape, a connection block is installed on the main mirror fixing base 212, and the connection block is connected to the bracket 211. Specifically, the support 211 is connected to the vertical plate 11 in parallel through three groups of bipod structures 23, the bipod structures 23 which are arranged in a triangle shape can ensure the stability of the support 211 on the vertical plate 11, and the flexible bipod structures 23 can offset or reduce the influence on the position and shape of the support 211 when the vertical plate 11 (the box body 1) is thermally deformed at different temperatures; the middle position of one end of the main mirror fixing base 212 is provided with a connecting block, and a plurality of threaded holes are formed in the connecting block and are connected to the bracket 211 through screws. It is conceivable that different main mirror holders 212 and main mirrors 22 may be replaced according to different usage requirements to improve the versatility of the entire collimator.
Further, the main mirror fixing base 212 has a groove structure, and the groove of the main mirror fixing base 212 corresponds to the shape of the main mirror 22, and the main mirror 22 is glued in the groove of the main mirror fixing base 212. Specifically, the main mirror fixing base 212 is a circular groove, the circular groove of the main mirror fixing base 212 corresponds to the shape of the main mirror 22, and the main mirror 22 is glued in the circular groove of the main mirror fixing base 212. More preferably, the bottom surface of the main mirror fixing base 212 is provided with a plurality of through holes symmetrically arranged at the center thereof, the through holes are beneficial to heat dissipation of the main mirror 22, and the main mirror fixing base 212 is provided with the through holes, so that the quality of the main mirror fixing base 212 and the whole light pipe structure can be reduced, and the installation and the maintenance are convenient.
Referring to fig. 5, further, the supporting legs 31 each comprise a frame structure 311 having a right trapezoid shape, a plurality of rib plates 312 parallel to the bottom edges of the frame structure 311 are arranged between two waists of the frame structure 311 at intervals, and the bottom edges of the frame structure 311 are connected with the bracket 211.
Referring to fig. 2-4, further, the secondary mirror support 51 includes a mounting bracket 511 and a secondary mirror mount 512, the mounting bracket 511 is connected to an end of the support leg 31 facing away from the primary mirror support 21, the secondary mirror mount 512 is disposed on the mounting bracket 511, and the secondary mirror 52 is mounted on the secondary mirror mount 512.
Further, the secondary mirror support 512 has an annular structure, and the inner hole of the secondary mirror support 512 is a stepped hole, and the secondary mirror 52 is glued in the stepped hole. Specifically, the mounting frame 511 is connected to the supporting leg 31 through a screw, the secondary mirror support 512 is mounted on the mounting frame 511 through a screw, the secondary mirror support 512 is annular, an inner hole of the secondary mirror support 512 is a step hole matched with the shape of the secondary mirror 52, and the secondary mirror 52 can be glued in the step hole; the installation and the dismantlement of whole secondary mirror mechanism 5 are comparatively convenient, can change different accessories according to different user demands, convenient and practical.
Further, the case 1 includes a bottom plate on which the vertical plate 11 is vertically disposed, and the support legs 31 extend parallel to the bottom plate with a gap therebetween. Specifically, one end of the supporting leg 31 is connected with the bracket 211, and the other end extends parallel to the bottom plate of the box body 1 and has a certain gap with the bottom plate to form a cantilever structure; it is conceivable that the suspended support leg 31 is not in direct contact with the case 1, and when the case 1 is thermally deformed due to a temperature change of the external environment, the suspended support leg 31 is hardly affected by the thermal deformation of the case 1 to change in position and posture, so that the change in position and posture of the fold mirror mechanism 4 and the sub-mirror mechanism 5 connected thereto is small, and the parallelism of light output of the light pipe is further ensured.
Further, the support legs 31 are made of invar. The invar material has a smaller thermal expansion coefficient, and has smaller thermal deformation when the external temperature changes, and smaller influence on the relative position and relative posture of the main mirror 22, the fold mirror 42 or the sub-mirror 52, which is beneficial to ensuring the light-emitting parallelism of the collimator. Preferably, the primary mirror support 21 and the secondary mirror support 51 may be made of invar, so as to further improve the light-emitting stability of the collimator.
Further, the vertical plate 11 is made of an aluminum alloy material.
Example two
The utility model also discloses an optical-mechanical system, which comprises the athermal off-axis reflective collimator according to the first embodiment.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. An off-axis reflective collimator for removing heat, which is characterized in that: comprising the steps of (a) a step of,
the box body comprises a vertical plate;
the main mirror mechanism comprises a main mirror support and a main mirror, the main mirror support is connected to the vertical plate through a plurality of bipod structures, and the main mirror is arranged on the main mirror support;
the support leg mechanism comprises a plurality of support legs which are arranged in parallel, and the support legs are connected with the main mirror support piece;
the folding mirror mechanism comprises a folding mirror supporting piece and a folding mirror, wherein the folding mirror supporting piece is connected with the supporting legs, and the folding mirror is arranged on the folding mirror supporting piece;
the secondary mirror mechanism comprises a secondary mirror supporting piece and a secondary mirror, wherein the secondary mirror supporting piece is connected to the supporting leg, and the secondary mirror is arranged on the secondary mirror supporting piece.
2. The athermal off-axis reflective collimator of claim 1, wherein: the main mirror support piece comprises a support and a main mirror fixing seat, the support is vertically connected to the vertical plate through three groups of bipod structures which are arranged in a triangular mode, a connecting block is mounted on the main mirror fixing seat, and the connecting block is connected with the support.
3. The athermal off-axis reflective collimator of claim 2, wherein: the main mirror fixing seat is of a groove structure, the groove of the main mirror fixing seat corresponds to the shape of the main mirror, and the main mirror is glued in the groove of the main mirror fixing seat.
4. The athermal off-axis reflective collimator of claim 2, wherein: the supporting legs comprise frame structures in right-angle trapezoid shapes, a plurality of rib plates parallel to the bottom edges of the two waists of the frame structures are arranged at intervals, and the lower bottom edges of the frame structures are connected with the support.
5. The athermal off-axis reflective collimator of claim 1, wherein: the secondary mirror support comprises a mounting frame and a secondary mirror support, the mounting frame is connected to one end of the support leg, which deviates from the primary mirror support, the secondary mirror support is arranged on the mounting frame, and the secondary mirror is mounted on the secondary mirror support.
6. The athermal off-axis reflective collimator of claim 5, wherein: the secondary mirror support is of an annular structure, an inner hole of the secondary mirror support is a step hole, and the secondary mirror is glued in the step hole.
7. The athermal off-axis reflective collimator of claim 1, wherein: the box body comprises a bottom plate, the vertical plate is vertically arranged on the bottom plate, and the supporting legs extend parallel to the bottom plate and are provided with gaps with the bottom plate.
8. The athermal off-axis reflective collimator of claim 1, wherein: the supporting legs are made of invar steel.
9. The athermal off-axis reflective collimator of claim 1, wherein: the vertical plate is made of aluminum alloy.
10. An optical-mechanical system, characterized in that: an athermal off-axis reflective collimator comprising the collimator of any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321275357.1U CN219625791U (en) | 2023-05-24 | 2023-05-24 | Heat-eliminating off-axis reflective collimator and optical-mechanical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321275357.1U CN219625791U (en) | 2023-05-24 | 2023-05-24 | Heat-eliminating off-axis reflective collimator and optical-mechanical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117724218A (en) * | 2024-02-18 | 2024-03-19 | 中国科学院长春光学精密机械与物理研究所 | Thermally stable camera structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117724218A (en) * | 2024-02-18 | 2024-03-19 | 中国科学院长春光学精密机械与物理研究所 | Thermally stable camera structure |
| CN117724218B (en) * | 2024-02-18 | 2024-04-26 | 中国科学院长春光学精密机械与物理研究所 | Thermally stable camera structure |
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