CN211348826U - High stability secondary mirror bearing structure - Google Patents
High stability secondary mirror bearing structure Download PDFInfo
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- CN211348826U CN211348826U CN201921871646.1U CN201921871646U CN211348826U CN 211348826 U CN211348826 U CN 211348826U CN 201921871646 U CN201921871646 U CN 201921871646U CN 211348826 U CN211348826 U CN 211348826U
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- secondary mirror
- lens
- gasket
- supporting seat
- high stability
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Abstract
The utility model provides a high-stability secondary mirror supporting structure, which comprises a secondary mirror supporting seat with a hollow structure, wherein a secondary mirror gasket is arranged in the inner cavity of the secondary mirror supporting seat, one side of the secondary mirror gasket is bonded on the inner side wall of the secondary mirror supporting seat, the other side of the secondary mirror gasket is abutted with a secondary mirror lens, a secondary mirror pressing ring is abutted against the other side of the secondary mirror lens relative to the secondary mirror gasket, and the secondary mirror pressing ring is in threaded connection with the inner wall of the secondary mirror supporting seat; the lens of the secondary mirror is pushed to move slightly by the expansion and contraction of the gasket of the secondary mirror, so that the expansion and contraction of the primary mirror base are counteracted, and the distance between the secondary mirror and the primary mirror is ensured; simultaneously, the pretightening force of the secondary mirror pressing ring and the adhesive filled in the adhesive groove of the secondary mirror base are cemented to fix the secondary mirror lens, so that the stability under the vibration environment is ensured, and the precision of astronomical star measurement is improved.
Description
Technical Field
The utility model relates to an optics space flight optics remote sensor technical field, concretely relates to high stability secondary mirror bearing structure.
Background
In the field of astronomical observers, a cassegrain optical system, also called a cassegrain telescope, i.e., a two-mirror optical system having a secondary mirror (hereinafter referred to simply as a secondary mirror) mounted between the vertex and the focal point of a primary mirror, is widely used. Therefore, the main reflector and the secondary reflector are indispensable parts of the cassegrain optical system, the relative position and posture of the two reflectors directly determine the astronomical star measurement precision of the cassegrain optical system, but because the outer diameter of the secondary reflector is far smaller than that of the main reflector, the error generated by the secondary reflector is larger at the same inclination amount or offset, so that a great deal of research needs to be carried out on the supporting and adjusting mechanism of the secondary reflector.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of above-mentioned technique, provide a high stability secondary mirror bearing structure, solve the secondary mirror that temperature variation, vibration etc. arouse and incline or the skew change for the emergence of primary mirror position, cause the problem of the precision that reduces astronomical star finder.
In order to realize the technical purpose, the utility model provides a high stability secondary mirror bearing structure, secondary mirror supporting seat including hollow structure, the inner chamber of secondary mirror supporting seat still is equipped with secondary mirror gasket, secondary mirror gasket one side bonds on the inside wall of secondary mirror supporting seat, and the opposite side butt has connect the secondary mirror lens, the opposite side of the relative secondary mirror gasket of secondary mirror lens still the butt has secondary mirror clamping ring, secondary mirror clamping ring threaded connection in on the inner wall of secondary mirror supporting seat.
Furthermore, a plurality of glue grooves are uniformly formed in the side wall of the inner cavity of the secondary mirror supporting seat along the circumferential direction, and each glue groove is provided with a glue injection hole used for injecting a bonding agent into the glue groove.
Further, the number of the glue grooves is at least three, and each group is 3.
Furthermore, a plurality of flexible bosses are fixedly mounted on one side of the secondary mirror pressing ring relative to the secondary mirror lens, and the other end of each flexible boss abuts against the flange end face of the secondary mirror lens.
Further, the number of the flexible bosses is at least three, and the flexible bosses are distributed on the side surface of the secondary mirror pressing ring along the circumferential direction.
Furthermore, the secondary mirror gasket is made of polytetrafluoroethylene material with good thermal expansion coefficient.
Compared with the prior art, the utility model discloses following effect has: the mounting flange surface of the secondary mirror lens and the imaging mirror surface are not coplanar, so that the influence of assembly stress and environment change stress on the surface shape precision of the secondary mirror lens is weakened, meanwhile, the secondary mirror pressing ring supports and presses the secondary mirror lens through three flexible bosses, the flexible bosses generate certain deformation to form certain pretightening force to press the secondary mirror lens on a secondary mirror gasket, the secondary mirror gasket is made of polytetrafluoroethylene materials, and through selecting proper gasket thickness, when the temperature changes, the thermal expansion and cold contraction of the secondary mirror gasket push the micro movement of the secondary mirror lens to offset the thermal expansion and cold contraction of a main mirror seat, so that the distance between the secondary mirror and the main mirror is ensured; simultaneously, the pretightening force of the secondary mirror pressing ring and the adhesive filled in the adhesive groove of the secondary mirror base are cemented to fix the secondary mirror lens, so that the stability under the vibration environment is ensured, and the precision of astronomical star measurement is improved.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a sectional view of the overall structure of the present invention;
FIG. 2 is a perspective view of the pressing ring of the secondary mirror of the present invention;
FIG. 3 is a perspective view of the secondary mirror support of the present invention;
fig. 4 is a schematic structural view of the secondary mirror lens of the present invention.
The list of components represented by the various reference numbers in the figures is as follows: 1. the secondary mirror comprises a secondary mirror supporting seat, 2 secondary mirror pressing rings, 3 secondary mirror lenses, 4 secondary mirror gaskets, 11 glue injection holes, 12 glue grooves, 21 flexible bosses, 31 flange end faces and 32 convex mirrors.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the above objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and preferred embodiments, it should be understood that the embodiments described in the present invention are only used for explaining the present invention, and are not used for limiting the present invention.
Please look up and show in fig. 1-4, the utility model provides a high stability secondary mirror bearing structure, including hollow structure's secondary mirror supporting seat 1, the inner chamber of secondary mirror supporting seat 1 still is equipped with secondary mirror gasket 4, and secondary mirror gasket 4 one side bonds on the inside wall of secondary mirror supporting seat 1, and opposite side butt has secondary mirror lens 3, and this secondary mirror lens 3 is convex mirror 32, and the opposite side of secondary mirror lens 3 relative secondary mirror gasket 4 still butt has secondary mirror clamping ring 2, and secondary mirror clamping ring 2 threaded connection is on the inner wall of secondary mirror supporting seat 1. The side wall of the inner cavity of the secondary mirror supporting seat 1 is uniformly provided with a plurality of glue grooves 12 along the circumferential direction, each glue groove 12 is provided with a glue injection hole 11 for injecting a bonding agent into the glue groove 12, at least three groups of glue grooves 12 are arranged for improving the stability of the secondary mirror lens 3, each group comprises 3 glue grooves, and when the bonding agent (such as 703 bonding agent sealant) flows into a gap between the glue groove 12 and the secondary mirror lens 3 through the glue injection holes 11, the bonding agent is cooled and compacted, so that the secondary mirror lens 3 can be installed and fixed in the inner cavity of the secondary mirror supporting seat 1; then, the mounting flange surface of the secondary mirror lens 3 is not coplanar with the imaging mirror surface, so that the influence of assembly stress and environment change stress on the surface shape precision of the secondary mirror lens 3 is weakened, meanwhile, the secondary mirror pressing ring 2 supports and presses the secondary mirror lens by utilizing three-point flexible bosses 21, the flexible bosses 21 generate certain deformation to form certain pretightening force to press the secondary mirror lens 3 on a secondary mirror gasket 4, the secondary mirror gasket 4 is made of polytetrafluoroethylene materials, and by selecting proper gasket thickness, when the temperature changes, the secondary mirror lens 3 is pushed to move slightly by the expansion and contraction of the secondary mirror gasket 4, the expansion and contraction of the primary mirror base are counteracted, and the distance between the secondary mirror and the primary mirror is ensured; meanwhile, the pretightening force of the secondary mirror pressing ring 2 and an adhesive (703 adhesive sealant) filled in the adhesive groove 12 of the secondary mirror supporting seat 1 are cemented to fix the secondary mirror lens 3, so that the stability under a vibration environment is ensured, and the accuracy of astronomical star measurement is improved.
In one embodiment, please refer to fig. 1 and 2, a plurality of flexible bosses 21 are further fixedly installed on one side of the secondary mirror pressing ring 2 opposite to the secondary mirror lens 3, and the other end of each flexible boss 21 abuts against a flange end face 31 of the secondary mirror lens 3; external screw thread that is equipped with on the external diameter of secondary mirror clamping ring 2 and the internal thread that is equipped with on the lateral wall of secondary mirror supporting seat 1 inner chamber mutually support, will screw up the removal at secondary mirror clamping ring 2 like this, remove flexible boss 21 on the secondary mirror clamping ring 2 of in-process and will take place a little deformation, the pretightning force that its deformation produced compresses tightly secondary mirror lens 3 on secondary mirror gasket 4, promote the stability of lens.
In one embodiment, please refer to fig. 2 and 3, each flexible boss 21 is a laminated structure, and the force-receiving expansion direction of each flexible boss 21 is perpendicular to the flange end face 31 of the secondary mirror lens 3; thus, the flexible boss 21 is deformed by extrusion or stretching, and the generated acting force is directly and effectively applied to the flange end face 31 of the secondary mirror lens 3 to adjust the installation position of the secondary mirror lens 3 in the inner cavity of the secondary mirror support seat 1. And in order to press secondary mirror lens 3 on secondary mirror gasket 4 better, therefore with flexible boss 21 quantity at least three, all along the side surface of circumferential distribution at secondary mirror clamping ring 2, utilize the high mode of three point support stability to set up, the stability of promotion secondary mirror lens 3 that can be fine, the effectual secondary mirror that has avoided temperature variation, vibration etc. to arouse inclines or the skew change poor stability relatively taking place of main mirror position, causes the emergence of the current situation of reduction astronomical star finding's precision.
In one embodiment, please refer to fig. 1 and 4, the secondary mirror gasket 4 is made of polytetrafluoroethylene material with good thermal expansion coefficient, when the temperature changes, the secondary mirror lens 3 is pushed to move slightly by expansion and contraction of the secondary mirror gasket 4, so as to counteract the expansion and contraction of the primary mirror base, and ensure the distance between the secondary mirror and the primary mirror, so that the secondary mirror and the primary mirror are not offset or inclined, and the accuracy of the astronomical star finder of the cassegrain telescope is improved.
The utility model provides a high-stability secondary mirror supporting structure, which pushes the secondary mirror lens 3 to move slightly through the expansion and contraction of the secondary mirror gasket 4, counteracts the expansion and contraction of the primary mirror seat, and ensures the distance of the secondary mirror relative to the primary mirror; meanwhile, the pretightening force of the secondary mirror pressing ring 2 and an adhesive (703 adhesive sealant) filled in the adhesive groove 12 of the secondary mirror supporting seat 1 are cemented to fix 3 pieces of the secondary mirror lens, so that the stability under a vibration environment is ensured, and the accuracy of astronomical star measurement is improved.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (7)
1. The utility model provides a high stability secondary mirror bearing structure, its characterized in that, secondary mirror supporting seat (1) including hollow structure, the inner chamber of secondary mirror supporting seat (1) still is equipped with secondary mirror gasket (4), secondary mirror gasket (4) one side bonds on the inside wall of secondary mirror supporting seat (1), and opposite side butt has secondary mirror lens (3), the opposite side of secondary mirror lens (3) relative secondary mirror gasket (4) still the butt has secondary mirror clamping ring (2), secondary mirror clamping ring (2) threaded connection in on the inner wall of secondary mirror supporting seat (1).
2. The secondary mirror support structure with high stability as claimed in claim 1, wherein a plurality of glue grooves (12) are uniformly formed on the sidewall of the inner cavity of the secondary mirror support base (1) along the circumferential direction, and each glue groove (12) is formed with a glue injection hole (11) for injecting a bonding agent into the glue groove (12).
3. A high stability secondary mirror support structure according to claim 2, wherein the number of glue grooves (12) is at least three groups, and 3 in each group.
4. A high stability secondary mirror support structure according to claim 1, wherein a plurality of flexible bosses (21) are further fixedly installed on one side of the secondary mirror pressing ring (2) opposite to the secondary mirror lens (3), and the other end of each flexible boss (21) abuts against a flange end face (31) of the secondary mirror lens (3).
5. A high stability secondary mirror support structure according to claim 4, wherein each of the flexible bosses (21) is of a laminated structure, and the force expansion and contraction direction of each flexible boss (21) is perpendicular to the flange end face (31) of the secondary mirror lens (3).
6. A high stability secondary mirror support structure according to claim 5, wherein the number of said flexible bosses (21) is at least three, each circumferentially distributed on the side surface of the secondary mirror clamping ring (2).
7. A high stability secondary mirror support structure according to claim 1, wherein said secondary mirror spacer (4) is made of teflon with good thermal expansion coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921871646.1U CN211348826U (en) | 2019-11-01 | 2019-11-01 | High stability secondary mirror bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921871646.1U CN211348826U (en) | 2019-11-01 | 2019-11-01 | High stability secondary mirror bearing structure |
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| CN211348826U true CN211348826U (en) | 2020-08-25 |
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| CN201921871646.1U Active CN211348826U (en) | 2019-11-01 | 2019-11-01 | High stability secondary mirror bearing structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255756A (en) * | 2020-11-17 | 2021-01-22 | 中国科学院长春光学精密机械与物理研究所 | Field diaphragm installation device and installation method thereof |
| CN113857973A (en) * | 2021-09-14 | 2021-12-31 | 北京空间机电研究所 | Process device for optical element processing and adjusting method |
-
2019
- 2019-11-01 CN CN201921871646.1U patent/CN211348826U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255756A (en) * | 2020-11-17 | 2021-01-22 | 中国科学院长春光学精密机械与物理研究所 | Field diaphragm installation device and installation method thereof |
| CN113857973A (en) * | 2021-09-14 | 2021-12-31 | 北京空间机电研究所 | Process device for optical element processing and adjusting method |
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