CN206906669U - A kind of primary and secondary mirror support of the high resonant frequency of Light deformation - Google Patents
A kind of primary and secondary mirror support of the high resonant frequency of Light deformation Download PDFInfo
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- CN206906669U CN206906669U CN201720703681.7U CN201720703681U CN206906669U CN 206906669 U CN206906669 U CN 206906669U CN 201720703681 U CN201720703681 U CN 201720703681U CN 206906669 U CN206906669 U CN 206906669U
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- mirror support
- secondary mirror
- primary
- support base
- resonant frequency
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Abstract
The utility model is specifically related to a kind of primary and secondary mirror support of the high resonant frequency of Light deformation, solves the problems, such as that existing primary and secondary mirror support device structure is complicated, cost is higher, resonant frequency is relatively low.Including primary mirror support seat, secondary mirror support base, three braced wings and three reinforcements；Primary mirror support seat is circular ring structure, and secondary mirror support base is hollow cone platform structure；One end of three braced wings is equidistantly fixedly installed on primary mirror support seat；The other end of three braced wings is equidistantly fixedly installed on secondary mirror support base, it is and tangent with the circular conical surface of secondary mirror support base, in terms of the axial direction of secondary mirror support base, three braced wings form a small triangle with the tangent part of the circular conical surface of secondary mirror support base, and the small triangle is also the edge of secondary mirror support base；Three reinforcements are separately positioned on the middle part of the adjacent supports wing.The utility model has preferable structural stability, can effectively improve the resonant frequency of large span primary and secondary mirror support.
Description
Technical field
The utility model belongs to space flight optical mirror slip support meanss field, and in particular to a kind of high resonance of large span Light deformation
The primary and secondary mirror support of frequency.
Background technology
At present, in space flight optical engineering field, especially in heavy caliber coaxial optical system, the optical interval of primary and secondary mirror will
Ask larger, optical interval precise requirements are higher, and require higher primary and secondary mirror axiality and less the ratio of obstruction.In order to ensure
System has less the ratio of obstruction, and supporting construction is usually to be supported fixation to secondary mirror by some brace rods, due to brace rod
Rigidity deficiency, causes primary and secondary mirror support resonant frequency relatively low, and extraneous vibration or thermal strain can cause the light of secondary mirror and primary mirror
Axle deviates, and forms aberration, influences the observation index of whole system.If primary and secondary mirror support design margin is insufficient, in mechanical environment
The failure of optics load is even caused to scrap during vibration certification test.
In conventional support structure, secondary mirror assembly is connected by lens barrel with primary mirror, and lens barrel expands with heat and contract with cold, and can cause primary and secondary mirror
The change of optical interval and the skew of systematic optical axis, the position of optics load optimum image plane is caused to vary with temperature, existing dress
Put and add dynamic focus adjusting mechanism in load rear end to solve the above problems, dynamic focus adjusting mechanism enters according to the change of temperature parameter
Row optimal imaging focal plane is adjusted, to ensure optimal optical index, but because the complexity of in-orbit space environment, dynamic are focused
The risk of failure mechanisms is higher, and focus adjusting mechanism also increases the quality of load, make primary and secondary mirror support device structure it is complicated, into
This increase, the requirement of space flight light-weight design is not met.Meanwhile optical system it is all supporting structure it is all larger using density
Low-grade fever strain gauge material be made, it is excessive into quality of loads to make optics.
Utility model content
In order to solve the problems, such as that existing primary and secondary mirror support device structure is complicated, cost is higher, resonant frequency is relatively low, this reality
A kind of primary and secondary mirror support of the high resonant frequency of large span microstrain is proposed with new, the primary and secondary mirror support is ensureing less heat
On the premise of strain, there is higher resonant frequency and less weight, ensure that the stability of optical system index.
The technical solution of the utility model is：
A kind of primary and secondary mirror support of the high resonant frequency of Light deformation, including primary mirror support seat and the secondary mirror support being coaxially disposed
Seat, in addition to three braced wings and three reinforcements；Primary mirror support seat is circular ring structure, and secondary mirror support base is hollow cone platform knot
Structure, the end face of secondary mirror support base are provided with the through hole of installation secondary mirror；One end of three braced wings is equidistantly fixedly installed on primary mirror
On support base；The other end of three braced wings is equidistantly fixedly installed on secondary mirror support base, integrated structure mechanical analysis, when three
When the tangent formation offset of circular conical surface of root braced wing and secondary mirror support base supports, secondary mirror bracket has higher resonant frequency,
In terms of the axial direction of secondary mirror support base, three braced wings form a small triangle with the tangent part of the circular conical surface of secondary mirror support base,
The small triangle is also the edge of secondary mirror support base；Three reinforcements are separately positioned on the middle part of the adjacent supports wing.
Further, it is additionally provided with lightening hole on secondary mirror support base.Lightening hole can not only mitigate the overall weight of support,
And the effective clear field of system is added, reduces the ratio of obstruction of optical system.
Further, primary mirror support seat, secondary mirror support base, braced wing and reinforcement use the metal of low thermal coefficient of expansion
Material or carbon fibre composite are made, and the drift displacement of the optimal focal plane of system is reduced in tolerance interval class, low
The metal material manufacturing cost of thermal coefficient of expansion is relatively low, and the process-cycle is short, and weight is also compared to lighter.
Further, primary mirror support seat, secondary mirror support base, braced wing and reinforcement are the metal material of low thermal coefficient of expansion
When by casting integrated shaping, ensure that the overall structural stability of support.
Further, primary mirror support seat, secondary mirror support base, braced wing and reinforcement are made of iron-nickel alloy, make branch
Frame has less cost.
Further, to ensure the overall structural stability of support, three reinforcements are disposed on the same plane, and make support
Structural stability it is more preferable.
The advantages of the utility model is：
1. the utility model makes support have preferable structural stability by 2 size triangles, can effectively improve big
The resonant frequency of span primary and secondary mirror support.
2. the utility model movement-less part, have that cost is low, safety coefficient is high in orbit and the less advantage of weight.
3. by the metal material of low thermal coefficient of expansion, the drift displacement of the optimal focal plane of system is reduced acceptable
Scope class, the metal material manufacturing cost of low thermal coefficient of expansion is relatively low, and the process-cycle is short, and weight is also compared to lighter.
4. the lightening hole in the utility model can not only mitigate the overall weight of support, and it is effective to add system
Clear field, reduce the ratio of obstruction of optical system.
5. the utility model primary and secondary mirror support uses casting integrated shaping, the overall structural stability of support ensure that.
Brief description of the drawings
Fig. 1 is the structure diagram one of the utility model embodiment；
Fig. 2 is Fig. 1 axial view；
Fig. 3 is the structure diagram two of the utility model embodiment；
Fig. 4 is the structure diagram three of the utility model embodiment.
Reference：1- braced wings, 2- reinforcements, the big triangles of 3-, the small triangles of 4-, 5- primary mirror support seats, the support of 6- secondary mirrors
Seat, 7- lightening holes.
Embodiment
Content of the present utility model is described in further detail below in conjunction with the drawings and specific embodiments：
As shown in figure 1, the primary and secondary mirror support of the high resonant frequency of Light deformation of the present utility model includes the primary mirror being coaxially disposed
Support base 5 and secondary mirror support base 6, primary mirror support seat 5 are circular ring structure, and secondary mirror support base 6 is hollow cone platform structure, and two support
Seat is linked together by three braced wings 1, reinforcement 2 is provided with again between the adjacent supports wing, wherein three braced wings 1 are circumferentially
It is distributed between primary and secondary mirror support base.One end of each braced wing is connected with primary mirror support seat, the circle of the other end and secondary mirror support base
The conical surface is tangent, i.e., in terms of the axial direction of secondary mirror support base, the tangent part formation of circular conical surface of braced wing and secondary mirror support base is one small
The edge of triangle 4, the small triangle 4 and secondary mirror support base one end, the other end of secondary mirror support base is circular hole, secondary for installing
Mirror.Three reinforcements 2 are disposed on the same plane, i.e., they are end to end, form one big triangle 3.
Lightening hole 7 is provided with secondary mirror support base 6.Lightening hole 7 can not only mitigate the overall weight of support, and increase
System effective clear field, reduce the ratio of obstruction of optical system.Three reinforcements 2 are respectively fixedly disposed at the adjacent supports wing
Middle part, using finite element analysis software, the position of reinforcement 2 is set to variable parameter, solving-optimizing resonant frequency, according to compared with
High resonant frequency, the final set location for determining reinforcement 2.
Primary mirror support seat 5, secondary mirror support base 6, braced wing 1 and reinforcement 2 use the metal material of low thermal coefficient of expansion
Or carbon fibre composite is made, low-grade fever stress design is realized.To ensure the stability of supporting structure, primary and secondary mirror support uses
Casting integrated shaping during the metal material of low thermal coefficient of expansion.
As shown in Fig. 2 the utility model provides a kind of primary and secondary mirror support of the high resonant frequency of large span microstrain, support is whole
Body uses iron-nickel alloy machine-shaping, and supporting construction uses three braced wings 1, and the circular conical surface of braced wing 1 and secondary mirror support base is adopted
With tangentOffset supporting form, three braced wings 1 form one with the tangent part of the circular conical surface of secondary mirror support base 6
Individual small triangle 4, is improved the resonant frequency of supporting construction, and three middle parts of braced wing 1 are connected by three reinforcements 2,
The middle part of braced wing 1 forms one big triangle 3, using the structural stability of front and rear two triangles of size, can effectively improve greatly across
The resonant frequency of primary and secondary mirror support is spent, and by the metal material of low thermal coefficient of expansion, by the drift of the optimal focal plane of system
Displacement is reduced in tolerance interval class, and the metal material price of low thermal coefficient of expansion is low, and the machine-shaping cycle is short, makes this practicality
New have that cost is low, and safety coefficient is high in orbit and the less advantage of weight.
As shown in Figure 3, Figure 4, braced wing 1 is lath-shaped, and its structural parameters is：Width b1, thickness h 1；Reinforcement 2 is plate
Strip, structural parameters are：Width b2, thickness h 2；On the premise of optical system the ratio of obstruction index request is ensured, pass through finite element
Analysis software, certain warm change condition is set, with respect to offset displacement D and is optimization object function with resonant frequency F and secondary mirror, branch
Four parameters of the support wing 1 and reinforcement 2 optimize analysis, Comprehensive analysis results, obtain higher resonant frequency FmaxIt is smaller
Dmin.Designed more than and optimize the measures such as analysis means so that the primary and secondary mirror support of large span has higher resonance frequency
Rate, low-grade fever strain, development cost is low, develops the characteristics of all short, product weight is light, and safety coefficient is high.
The scope of protection of the utility model is not limited to specific embodiment of the present utility model, for the skill of the art
For art personnel, under enlightenment of the present utility model, directly can exporting association from the utility model disclosure, some are former
Reason and structure identical basic deformation, or the replacement of known technology is commonly used in the prior art, and feature identical is mutually different
Combination, the technical characteristic of same or similar technique effect simply change, and belong to the protection domain of the utility model technology.
Claims (6)
1. a kind of primary and secondary mirror support of the high resonant frequency of Light deformation, including the primary mirror support seat and secondary mirror support base being coaxially disposed,
It is characterized in that：Also include three braced wings and three reinforcements；Primary mirror support seat is circular ring structure, and secondary mirror support base is hollow
Circular cone structure, the end face of secondary mirror support base are provided with the through hole of installation secondary mirror；
One end of three braced wings is equidistantly fixedly installed on primary mirror support seat；The other end of three braced wings is equidistantly fixed
It is arranged on secondary mirror support base, and it is tangent with the circular conical surface of secondary mirror support base, in terms of the axial direction of secondary mirror support base, three braced wings
A small triangle is formed with the tangent part of the circular conical surface of secondary mirror support base, the small triangle is also the edge of secondary mirror support base；Three
Root reinforcement is separately positioned on the middle part of the adjacent supports wing.
2. the primary and secondary mirror support of the high resonant frequency of Light deformation according to claim 1, it is characterised in that：On secondary mirror support base
It is additionally provided with lightening hole.
3. the primary and secondary mirror support of the high resonant frequency of Light deformation according to claim 1, it is characterised in that：Primary mirror support seat,
Secondary mirror support base, braced wing and reinforcement are made of the metal material or carbon fibre composite of low thermal coefficient of expansion.
4. the primary and secondary mirror support of the high resonant frequency of Light deformation according to claim 3, it is characterised in that：Primary mirror support seat,
Secondary mirror support base, braced wing and reinforcement pass through casting integrated shaping when using the metal material of low thermal coefficient of expansion.
5. the primary and secondary mirror support of the high resonant frequency of Light deformation according to any one of claims 1 to 4, it is characterised in that：Primary mirror
Support base, secondary mirror support base, braced wing and reinforcement are made of iron-nickel alloy.
6. the primary and secondary mirror support of the high resonant frequency of Light deformation according to claim 5, it is characterised in that：Three reinforcements are set
Put at grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720703681.7U CN206906669U (en) | 2017-06-16 | 2017-06-16 | A kind of primary and secondary mirror support of the high resonant frequency of Light deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720703681.7U CN206906669U (en) | 2017-06-16 | 2017-06-16 | A kind of primary and secondary mirror support of the high resonant frequency of Light deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206906669U true CN206906669U (en) | 2018-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720703681.7U Withdrawn - After Issue CN206906669U (en) | 2017-06-16 | 2017-06-16 | A kind of primary and secondary mirror support of the high resonant frequency of Light deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206906669U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144935A (en) * | 2017-06-16 | 2017-09-08 | 中国科学院西安光学精密机械研究所 | A kind of primary and secondary mirror support of the high resonant frequency of Light deformation |
-
2017
- 2017-06-16 CN CN201720703681.7U patent/CN206906669U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144935A (en) * | 2017-06-16 | 2017-09-08 | 中国科学院西安光学精密机械研究所 | A kind of primary and secondary mirror support of the high resonant frequency of Light deformation |
| CN107144935B (en) * | 2017-06-16 | 2022-12-23 | 中国科学院西安光学精密机械研究所 | Primary and secondary mirror support of high resonant frequency of micro-deformation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180119 Effective date of abandoning: 20221223 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180119 Effective date of abandoning: 20221223 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |