CN101799580A - Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement - Google Patents
Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement Download PDFInfo
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- CN101799580A CN101799580A CN 201010144352 CN201010144352A CN101799580A CN 101799580 A CN101799580 A CN 101799580A CN 201010144352 CN201010144352 CN 201010144352 CN 201010144352 A CN201010144352 A CN 201010144352A CN 101799580 A CN101799580 A CN 101799580A
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- web member
- basic web
- compensating cylinder
- length
- cylinder
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 20
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 7
- 239000004917 carbon fiber Substances 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000004643 cyanate ester Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000000805 composite resin Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000005606 hygroscopic expansion Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003913 materials processing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The invention relates to a moisture absorption expansion compensation fixed length structure and a telescope secondary mirror fixed length supporting device, wherein the moisture absorption expansion compensation fixed length structure is characterized in that: the compensation device comprises a basic connecting piece and a compensation cylinder connected with the basic connecting piece, wherein the compensation cylinder is coaxially arranged in the basic connecting piece, a fixed end of the compensation cylinder is fixedly connected with a free end of the basic connecting piece, and the free end of the compensation cylinder is positioned on one side of the fixed end of the basic connecting piece; the length L of the basic connecting piece and the length M of the compensating cylinder satisfy M ═ L × E × A/(F × B), E is the hygroscopic expansion coefficient of the basic connecting piece in the length direction, and A is the saturated hygroscopic percentage of the basic connecting piece; f is the coefficient of moisture absorption and expansion of the compensation cylinder in the length direction, and B is the percentage of saturated moisture absorption of the compensation cylinder. The telescope secondary mirror support structure solves the technical problem that the length of the telescope secondary mirror support structure processed by the carbon fiber reinforced resin composite material is easily influenced by the environmental humidity, and has the advantages of high precision, high reliability, simple structure and convenience in assembly and adjustment.
Description
Technical field
The present invention relates to a kind of moisture expantion compensated length-fixed structure, relate in particular to a kind of telescope secondary mirror and support length-fixed structure.
Background technology
Telescope guarantees accurate interval between primary mirror and the secondary mirror with length-fixed structure usually.Existing telescope secondary mirror supporting construction by carbon fiber-reinforced resin composite materials processing, change adsorption moisture or slough moisture with ambient humidity easily, length increases thereupon or dwindles, and causes the interval between telescope primary mirror and the secondary mirror to change, and the performance of optical system descends.
Summary of the invention
The purpose of this invention is to provide a kind of moisture expantion compensated length-fixed structure, it has solved the technical matters that existing telescope secondary mirror supporting construction length by carbon fiber-reinforced resin composite materials processing is subject to the ambient humidity influence, the stability of optical system has been improved in the position that has kept secondary mirror.
Technical solution of the present invention is:
A kind of moisture expantion compensated length-fixed structure, its special character is: comprise basic web member and the compensating cylinder that links to each other with basic web member, described compensating cylinder is coaxial to be arranged in the basic web member, and the compensating cylinder stiff end is connected mutually with the free end of basic web member and the free end of compensating cylinder is positioned at stiff end one side of basic web member; The length M of described basic web member length L and compensating cylinder satisfies M=L * E * A/, and (F * B), wherein E is a basic web member moisture expantion coefficient in the longitudinal direction, and A is the saturated moisture absorption number percent of basic web member; F is a compensating cylinder moisture expantion coefficient in the longitudinal direction, and B is the saturated moisture absorption number percent of compensating cylinder.
Above-mentioned basic web member structure is cylindrical drum or cylinder truss or circular cone bridge.
Above-mentioned compensating cylinder structure is cylindrical drum or cylinder truss or circular cone bridge.
The material of above-mentioned basic web member is that carbon fiber strengthens the cyanate ester compound substance, and the material of described compensating cylinder is a carbon-fibre reinforced epoxy resin composite material.
A kind of telescope secondary mirror bracing or strutting arrangement of length-fixed structure, comprise secondary mirror, basic web member and the compensating cylinder that links to each other with basic web member, described compensating cylinder is coaxial to be arranged in the basic web member, and the compensating cylinder stiff end is connected mutually with the free end of basic web member and the free end of compensating cylinder is positioned at stiff end one side of basic web member; The length M of described basic web member length L and compensating cylinder satisfies M=L * E * A/, and (F * B), wherein E is a basic web member moisture expantion coefficient in the longitudinal direction, and A is the saturated moisture absorption number percent of basic web member; F is a compensating cylinder moisture expantion coefficient in the longitudinal direction, and B is the saturated moisture absorption number percent of compensating cylinder, and described secondary mirror is arranged on the free end of compensating cylinder, and the stiff end of described basic web member is connected with primary mirror.
Above-mentioned basic web member structure is cylindrical drum or cylinder truss or circular cone bridge.
Above-mentioned compensating cylinder structure is cylindrical drum or cylinder truss or circular cone bridge.
Said apparatus comprises also and is fixed on free-ended picture frame of compensating cylinder that described secondary mirror is pressed in time picture frame by trim ring.
The material of above-mentioned basic web member is that carbon fiber strengthens the cyanate ester compound substance, and the material of described compensating cylinder is a carbon-fibre reinforced epoxy resin composite material.
Beneficial effect of the present invention is:
1, precision height.Utilization of the present invention has the compound substance of different moisture expantion coefficients and saturated moisture absorption number percent, and the moisture expantion of composite structure is compensated, and makes the influence that perspective glass primary and secondary mirror spacing is not changed by ambient humidity.
2, the reliability height, simple in structure, debug conveniently.The present invention only need be installed in secondary mirror on the moisture expantion collocation structure by inferior picture frame, and is simple in structure, debugs conveniently the reliability height.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the synoptic diagram of cylindrical drum for the basic web member of the present invention;
Fig. 3 is the synoptic diagram of cylinder truss for the basic web member of the present invention;
Fig. 4 is the synoptic diagram of circular cone bridge for the basic web member of the present invention.
Wherein Reference numeral is as follows: the basic web member of 1-, 2-compensating cylinder, 3-picture frame, 4-secondary mirror, 5-trim ring, 6-cylindrical drum, 7-cylinder truss, 8-circular cone bridge.
Embodiment
Be illustrated in figure 1 as structural representation of the present invention, comprise basic web member 1 and the compensating cylinder 2 that links to each other with basic web member 1, compensating cylinder 2 coaxial being arranged in the basic web member 1, compensating cylinder 2 stiff ends are connected by pad, screw and nut mutually with the free end of basic web member 1, and the free end of compensating cylinder is positioned at stiff end one side of basic web member; The length M of basic web member length L and compensating cylinder satisfies M=L * E * A/, and (F * B), wherein E is a basic web member moisture expantion coefficient in the longitudinal direction, and A is the saturated moisture absorption number percent of basic web member; F is a compensating cylinder moisture expantion coefficient in the longitudinal direction, and B is the saturated moisture absorption number percent of compensating cylinder.Basic web member structure can be cylindrical drum or cylinder truss or circular cone bridge.The compensating cylinder structure can be cylindrical drum or cylinder truss or circular cone bridge.The material of basic web member is that carbon fiber strengthens the cyanate ester compound substance, and the material of described compensating cylinder is a carbon-fibre reinforced epoxy resin composite material.
A kind of telescope secondary mirror bracing or strutting arrangement of length-fixed structure, comprise secondary mirror 4, basic web member 1 and the compensating cylinder 2 that links to each other with basic web member, compensating cylinder 2 coaxial being arranged in the basic web member 1, compensating cylinder stiff end are connected mutually with the free end of basic web member and the free end of compensating cylinder is positioned at stiff end one side of basic web member; The length M of basic web member length L and compensating cylinder satisfies M=L * E * A/, and (F * B), wherein E is a basic web member moisture expantion coefficient in the longitudinal direction, and A is the saturated moisture absorption number percent of basic web member; F is a compensating cylinder moisture expantion coefficient in the longitudinal direction, and B is the saturated moisture absorption number percent of compensating cylinder, and secondary mirror is arranged on the free end of compensating cylinder, and secondary mirror is pressed in time picture frame by trim ring, and the stiff end of basic web member is connected with primary mirror.Basic web member structure is cylindrical drum or cylinder truss or circular cone bridge.When ambient humidity changed, basic web member 1 and compensating cylinder 2 carried out the moisture expantion or the contraction of drying simultaneously, and the length variations amount equates, cancels out each other, and finally keeps the axial location of secondary mirror 4 constant.
Being illustrated in figure 2 as the basic web member of the present invention is the synoptic diagram of cylindrical drum, when basic web member 1 structural shape is cylindrical drum 6, is made up of cylinder, spoke, central tube and front and back flange, and profile is cylindrical.
Being illustrated in figure 3 as the basic web member of the present invention is the synoptic diagram of cylinder truss, when basic web member 1 structural shape is cylinder truss 7, is made up of connecting link, spoke, central tube and front and back flange, and appearance profile is cylindrical.
Being illustrated in figure 4 as the basic web member of the present invention is the synoptic diagram of circular cone bridge, when basic web member 1 structural shape is circular cone bridge 8, is made up of connecting link, spoke, central tube and rear flange, and it is conical that appearance profile is.
Embodiment:
When basic web member 1 is the cylindrical drum pattern, material is that a kind of carbon fiber strengthens cyanate ester compound substance M6OJ/954-3, and under 50% relative humidity, moisture expantion coefficient E is 59PPM/%M, and saturated moisture absorption number percent is 0.18 (%M).Compensating cylinder 2 is another kind of carbon-fibre reinforced epoxy resin composite material GY7O/934, and under 50% relative humidity, moisture expantion coefficient E is 157PPM/%M, and saturated moisture absorption number percent is 0.54 (%M).If when the length of basic web member 1 was 500mm, the length of compensating cylinder 2 equaled 62.63mm, can compensate the moisture expantion under varying environment humidity of basic web member 1 and change the length change that causes.
Claims (9)
1. moisture expantion compensated length-fixed structure, it is characterized in that: comprise basic web member and the compensating cylinder that links to each other with basic web member, described compensating cylinder is coaxial to be arranged in the basic web member, and the compensating cylinder stiff end is connected mutually with the free end of basic web member and the free end of compensating cylinder is positioned at stiff end one side of basic web member; The length M of described basic web member length L and compensating cylinder satisfies M=L * E * A/, and (F * B), wherein E is a basic web member moisture expantion coefficient in the longitudinal direction, and A is the saturated moisture absorption number percent of basic web member; F is a compensating cylinder moisture expantion coefficient in the longitudinal direction, and B is the saturated moisture absorption number percent of compensating cylinder.
2. moisture expantion compensated length-fixed structure according to claim 1 is characterized in that: described basic web member structure is cylindrical drum or cylinder truss or circular cone bridge.
3. moisture expantion compensated length-fixed structure according to claim 2 is characterized in that: described compensating cylinder structure is cylindrical drum or cylinder truss or circular cone bridge.
4. according to claim 1 or 2 or 3 described moisture expantion compensated length-fixed structures, it is characterized in that: the material of described basic web member is that carbon fiber strengthens the cyanate ester compound substance, and the material of described compensating cylinder is a carbon-fibre reinforced epoxy resin composite material.
5. the telescope secondary mirror bracing or strutting arrangement of a length-fixed structure, it is characterized in that: comprise secondary mirror, basic web member and the compensating cylinder that links to each other with basic web member, described compensating cylinder is coaxial to be arranged in the basic web member, and the compensating cylinder stiff end is connected mutually with the free end of basic web member and the free end of compensating cylinder is positioned at stiff end one side of basic web member; The length M of described basic web member length L and compensating cylinder satisfies M=L * E * A/, and (F * B), wherein E is a basic web member moisture expantion coefficient in the longitudinal direction, and A is the saturated moisture absorption number percent of basic web member; F is a compensating cylinder moisture expantion coefficient in the longitudinal direction, and B is the saturated moisture absorption number percent of compensating cylinder, and described secondary mirror is arranged on the free end of compensating cylinder, and the stiff end of described basic web member is connected with primary mirror.
6. the telescope secondary mirror bracing or strutting arrangement of length-fixed structure according to claim 5, it is characterized in that: described basic web member structure is cylindrical drum or cylinder truss or circular cone bridge.
7. the telescope secondary mirror bracing or strutting arrangement of length-fixed structure according to claim 6, it is characterized in that: described compensating cylinder structure is cylindrical drum or cylinder truss or circular cone bridge.
8. according to the telescope secondary mirror bracing or strutting arrangement of claim 5 or 6 or 7 described length-fixed structures, it is characterized in that: described device comprises also and is fixed on free-ended picture frame of compensating cylinder that described secondary mirror is pressed in time picture frame by trim ring.
9. the telescope secondary mirror bracing or strutting arrangement of length-fixed structure according to claim 8 is characterized in that: the material of described basic web member is that carbon fiber strengthens the cyanate ester compound substance, and the material of described compensating cylinder is a carbon-fibre reinforced epoxy resin composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101443526A CN101799580B (en) | 2010-04-12 | 2010-04-12 | Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101443526A CN101799580B (en) | 2010-04-12 | 2010-04-12 | Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101799580A true CN101799580A (en) | 2010-08-11 |
| CN101799580B CN101799580B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101443526A Expired - Fee Related CN101799580B (en) | 2010-04-12 | 2010-04-12 | Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412400A (en) * | 2013-07-20 | 2013-11-27 | 中国科学院光电技术研究所 | Heat diaphragm adjustable type segmented supporting device for coaxial solar telescope |
| CN104570265A (en) * | 2014-12-18 | 2015-04-29 | 中国科学院西安光学精密机械研究所 | Lightweight, simplified and high-stability primary and secondary lens component of coaxial camera and mounting method |
| CN107144935A (en) * | 2017-06-16 | 2017-09-08 | 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 |
| CN111487758A (en) * | 2020-05-11 | 2020-08-04 | 湖南源信光电科技股份有限公司 | Glimmer night vision sighting telescope |
| CN112731618A (en) * | 2021-01-15 | 2021-04-30 | 长光卫星技术有限公司 | Light-duty multi-functional secondary mirror bearing structure of integration suitable for space camera |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249456A (en) * | 1992-06-26 | 1993-10-05 | Eastman Kodak Company | Assembly suitable for determining a coefficient of moisture expansion of a workpiece |
| DE19823878C1 (en) * | 1998-05-28 | 1999-12-23 | Mannesmann Sachs Ag | Two-tube vibration damper with a compensating element |
| CN2872391Y (en) * | 2005-11-22 | 2007-02-21 | 大立光电股份有限公司 | Lens set structure |
| CN201298098Y (en) * | 2008-03-28 | 2009-08-26 | 富士能株式会社 | Lens assembly body and image pick-up device |
| CN201716468U (en) * | 2010-04-12 | 2011-01-19 | 中国科学院西安光学精密机械研究所 | Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement |
-
2010
- 2010-04-12 CN CN2010101443526A patent/CN101799580B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249456A (en) * | 1992-06-26 | 1993-10-05 | Eastman Kodak Company | Assembly suitable for determining a coefficient of moisture expansion of a workpiece |
| DE19823878C1 (en) * | 1998-05-28 | 1999-12-23 | Mannesmann Sachs Ag | Two-tube vibration damper with a compensating element |
| CN2872391Y (en) * | 2005-11-22 | 2007-02-21 | 大立光电股份有限公司 | Lens set structure |
| CN201298098Y (en) * | 2008-03-28 | 2009-08-26 | 富士能株式会社 | Lens assembly body and image pick-up device |
| CN201716468U (en) * | 2010-04-12 | 2011-01-19 | 中国科学院西安光学精密机械研究所 | Moisture absorption expansion compensation fixed length structure and telescope secondary mirror fixed length strutting arrangement |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412400A (en) * | 2013-07-20 | 2013-11-27 | 中国科学院光电技术研究所 | Heat diaphragm adjustable type segmented supporting device for coaxial solar telescope |
| CN103412400B (en) * | 2013-07-20 | 2015-12-02 | 中国科学院光电技术研究所 | Heat diaphragm adjustable type segmented supporting device for coaxial solar telescope |
| CN104570265A (en) * | 2014-12-18 | 2015-04-29 | 中国科学院西安光学精密机械研究所 | Lightweight, simplified and high-stability primary and secondary lens component of coaxial camera and mounting method |
| CN107144935A (en) * | 2017-06-16 | 2017-09-08 | 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 |
| 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 |
| CN111487758A (en) * | 2020-05-11 | 2020-08-04 | 湖南源信光电科技股份有限公司 | Glimmer night vision sighting telescope |
| CN112731618A (en) * | 2021-01-15 | 2021-04-30 | 长光卫星技术有限公司 | Light-duty multi-functional secondary mirror bearing structure of integration suitable for space camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101799580B (en) | 2012-01-04 |
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