CN107783249A - A kind of space active thermal optical system - Google Patents
A kind of space active thermal optical system Download PDFInfo
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- CN107783249A CN107783249A CN201710915483.1A CN201710915483A CN107783249A CN 107783249 A CN107783249 A CN 107783249A CN 201710915483 A CN201710915483 A CN 201710915483A CN 107783249 A CN107783249 A CN 107783249A
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- speculum
- correction
- active thermal
- actuator
- optical system
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/181—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Astronomy & Astrophysics (AREA)
- Sustainable Development (AREA)
- Telescopes (AREA)
- Lens Barrels (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
A kind of space active thermal optical system of the present invention, the space active thermal optical system include：First speculum and the second speculum, first speculum and the second speculum are separately positioned on the both ends of lens barrel；Multiple correction actuators, it is multiple correction actuators in a part correction actuator be located on the first speculum, it is multiple correction actuators in another part correct actuator be located on the second speculum；Active thermal optical controller, electrically connected respectively with multiple temperature sensors and correction actuator control；The active thermal optical controller is used for temperature, the temperature of the second speculum and the temperature of lens barrel of the first speculum detected according to multiple temperature sensors, obtain calibrated force and the displacement that each correction actuator should apply, the calibrated force and displacement are exported to the correction actuator driver by correcting actuator control, and actuator driver control is multiple to correct actuators to complete the displacement of the face shape of control and the first speculum of correction and the second speculum by correcting.
Description
Technical field
The present invention relates to space telescope field, more particularly to a kind of space active thermal optical system.
Background technology
In the research of telescope such as large-scale ground or infrared telescope, become when due to gravity, overload, impact, temperature
When systematic wavefront affects greatly to the performance of telescope caused by shape etc., optical technology of typically taking the initiative prevents
Influence of the systematic wavefront to telescope.Existing active optics system is to correct the closed-loop control system of wavefront error, main
To be made up of Wavefront sensor, computer control system, correcting element and correction actuator.By being distributed in mirror back surface
Actuator array applies axial force to speculum and carries out mirror shape control, to correct the primary mirror of large telescope due to weight
Face shape error caused by power change, foozle and thermograde etc..The system need to only consider mirror shape, have technical flow
The advantages of journey is clear.But the complicated of system, weight are big and higher to the dependence of Wavefront sensor.To space telescope
For, picture matter influence of the optical system Mirror thermal distortion caused by temperature field on whole telescope is the most serious, for this low
Frequency surface deformation can use the method for improving space telescope thermal control precision, but this will not only spend a large amount of funds, also increase
The complexity of whole optical system.
The content of the invention
Present invention seek to address that it is big and right to solve existing active optics system complexity height, system weight in the prior art
The problem of dependence of Wavefront sensor is higher, propose a kind of space active thermal optical system.
The present invention provides a kind of space active thermal optical system of embodiment, and the space active thermal optical system includes：
First speculum and the second speculum, first speculum and the second speculum are separately positioned on the both ends of lens barrel；Multiple temperature
Sensor is spent, is distributed on the first speculum, the second speculum and lens barrel；Multiple correction actuators, it is multiple to correct in actuators
Part correction actuator is located on the first speculum, and another part correction actuator is anti-positioned at second in multiple correction actuators
Penetrate on mirror；Active thermal optical controller, electrically connected respectively with multiple temperature sensors and correction actuator control；Correction actuates
Device driver, electrically connected respectively with correction actuator control and multiple correction actuators；Wherein described active thermal optics control
Device is used for temperature, the temperature of the second speculum and the temperature of lens barrel of the first speculum detected according to multiple temperature sensors
Degree, calibrated force and the displacement that each correction actuator should apply are obtained, by correcting described in actuator control output
Calibrated force and displacement actuate to the correction actuator driver, and by correcting the multiple corrections of actuator driver control
Device with complete control with correction the first speculum face shape and the second speculum displacement.
Compared with prior art, beneficial effect is technical scheme：Obtain in real time by temperature sensor
The temperature of the temperature of one speculum, the temperature of the second speculum and lens barrel, active thermal optical controller is according to the first speculum
The temperature of temperature, the temperature of the second speculum and lens barrel, obtains each calibrated force that should apply of correction actuator and displacement is big
The small displacement to complete to control with the face shape of the first speculum of correction and the second speculum, therefore Wavefront sensor can be cancelled,
Without carrying out real-time detection and feedback to the first reflecting mirror surface shape, so as to reduce active optics system complexity, cause simultaneously
The structure of space active thermal optical system is simple, in light weight, and cost is relatively low.The tune to the first reflecting mirror surface shape is considered in addition
Whole and the second mirror displacements controls, it is adaptable, it can adapt to the coaxial or off-axis formula space optics system of various bores
System.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment of active thermal optical system in space of the present invention.
1st, the first speculum, the 2, second speculum, 3, temperature sensor, 4, correction actuator, 5, temperature meter, 6, main
Move hot optical controller, 7, correction actuator control, 8, correction actuator driver and 9, lens barrel.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings.
The present invention principle be utilization space optical system imaging quality major disturbances source be temperature field change, optics
The focal plane and Deformation of surface figure situation of system can be reflected with temperature information.The low-spatial frequency errors of Space Optical System are (partially
The heart, defocus, the change of primary and secondary mirror spacing etc.) position for changing the second speculum can be used to be adjusted, high spatial frequency error
(main mirror face removes translation, inclination, axial defocusing and residual error) can be by adjusting the face shape of the first speculum come complete
Into.
The present invention provides a kind of space active thermal optical system of embodiment, as shown in figure 1, the system includes：
First speculum 1 and the second speculum 2, the speculum 2 of the first speculum 1 and second are separately positioned on lens barrel 9
Both ends；
Multiple temperature sensors 3, it is distributed on the first speculum 1, the second speculum 2 and lens barrel 9；
Multiple to correct actuators 4, part correction actuator is located on the first speculum 1 in multiple correction actuators 4, more
Another part correction actuator is located on the second speculum 2 in individual correction actuator 4；
Active thermal optical controller 6, electrically connected respectively with multiple temperature sensors 3 and correction actuator control 7；
Actuator driver 8 is corrected, is electrically connected respectively with correction actuator control 7 and multiple correction actuators 4；Wherein
The active thermal optical controller 6 is used for the temperature, second anti-of the first speculum 1 detected according to multiple temperature sensors 3
The temperature of mirror 2 and the temperature of lens barrel 9 are penetrated, calibrated force and the displacement that each correction actuator 4 should apply is obtained, passes through school
Positive actuator control 7 exports the calibrated force and displacement to the correction actuator driver 8, and is actuated by correction
Device driver 8 controls multiple correction actuators 4 to complete control and the face shape and second speculum 2 of the first speculum 1 of correction
Displacement.
Because the first speculum 1 is acted on down by temperature loading, the minute surface of the first speculum 1 can produce thermal deformation, so as to lead
The specular surface of speculum 1 is caused to produce different degrees of projection in different zones or be recessed, the minute surface under perfect optical system
Face shape is smooth continuous curve surface, and the face shape school for realizing speculum is to recover the face shape correction of minute surface after deformation to close ideal
Mirror shape under optical system.
The present invention obtains the temperature of the first speculum, the temperature of the second speculum and lens barrel by temperature sensor in real time
Temperature, active thermal optical controller obtain every according to the temperature, the temperature of the second speculum and the temperature of lens barrel of the first speculum
Face shape and second of the calibrated force and displacement that individual correction actuator should apply to complete control with correct the first speculum
The displacement of speculum, therefore Wavefront sensor can be cancelled, without carrying out real-time detection and feedback to the first reflecting mirror surface shape, from
And active optics system complexity is reduced, while make it that the structure of space active thermal optical system is simple, it is in light weight, and cost
It is relatively low.The adjustment to the first reflecting mirror surface shape and the control of the second mirror displacements, adaptable, Neng Goushi are considered in addition
Answer the coaxial or off-axis formula Space Optical System of various bores.
In specific implementation, multiple correction actuators 4 are arranged on the bottom of first speculum 1.Multiple corrections promote
Dynamic device 4 is arranged on the bottom or side of second speculum 2.Multiple correction actuators 4 are evenly distributed in the first speculum 1
On the second speculum.The speculum 2 of first speculum 1 and second is is coaxially disposed either located off-axis, and described the
The face shape of one speculum 1 and the face shape of the second speculum 2 are oppositely arranged.The speculum 2 of first speculum 1 and second leads to respectively
Cross the both ends that flexible structure is arranged on lens barrel 9.Multiple temperature sensors 3 be uniformly or non-uniformly distributed in the first speculum 1,
On second speculum 2 and lens barrel 9.Specifically, the first speculum 1 and the second speculum 2 use carbofrax material, the first reflection
The bottom lightweight structure of the bottom lightweight structure of mirror 1 and the second speculum 2 is cellular structure.Correction actuator 4 is adopted
With driving stepper motor, 18 correction actuators 4 are uniformly distributed pacifies installed in the bottom of the first speculum 1,7 correction actuators 4
It is anti-with the first speculum 1 and second respectively by epoxy glue mounted in the side and bottom of the second speculum 2, correction actuator 4
Mirror 2 is penetrated to be bonded.Temperature sensor 3 uses thermistor, model MF501, is pasted onto by room temperature vulcanized silicone rubber GD414
On the temperature measuring point of one speculum 1, the second speculum 2 and lens barrel 9, drink temperature sensor 3 more and connected with temperature meter 5 by cable
Connect and sent the temperature of the temperature of the first speculum 1, the temperature of the second speculum 2 and lens barrel 9 to master by spending measuring system 5
Move hot optical controller 6.36 temperature sensors 3 are set wherein on the first speculum 1,4 temperature are set on the second speculum 2
Sensor 3,32 temperature sensors 3 are set on lens barrel 9.Active thermal optical controller system 6 respectively with temperature meter 5 and correction
Actuator control 7 is connected by cable.
In specific implementation, active thermal optical controller 6 is additionally operable to：
According to the temperature of the temperature of the first speculum 1, the temperature of the second speculum 2 and lens barrel 9, the first mirror surface is obtained
Spacing knots modification between shape, the variable quantity of the first reflecting mirror surface shape and the first speculum 1 and the second speculum 2；
According to the first reflecting mirror surface shape, face shape error is obtained；
According to the face shape error, the variable quantity of the first reflecting mirror surface shape and the first speculum 1 and the second speculum 2
Spacing knots modification obtains each calibrated force that should apply of correction actuator and displacement to be moved by multiple correction actuators 4
The second reflecting mirror surface shape of position and adjustment of dynamic second speculum.
Specifically, the correction of the space active thermal optical system and control process are as follows：First, temperature meter 5 will
The profiling temperatures of the first speculum 1, the second speculum 2 and lens barrel 9 obtained by the measurement of temperature sensors of high precision 3 feed back to
Active thermal optical controller 6；Then, active thermal optical controller 6 according to default ray machine be thermally integrated simulation data base and temperature-
Face shape conversion program, analysis calculate the variable quantity and the first speculum 1 of the face shape of the first speculum 1, the face shape of the first speculum 1
With the spacing knots modification of the second speculum 2, wherein the spacing knots modification between the first speculum 1 and the second speculum 2 includes edge
The bias of optical axis direction and horizontal direction.By the face shape of the first speculum 1 by Zernike Factoring Polynomials for translation, tilt,
Axial defocusing and face shape error, wherein, translation, tilt, between axial defocusing and the first speculum 1 and the second speculum 2 between
Being corrected away from knots modification by the position of mobile second speculum 2, face shape error is completed by adjusting the face shape of the first speculum 1,
Face shape error can be that time high-order residual error includes astigmatism, coma and spherical aberration etc..Active thermal optical controller 6 passes through default face shape
Calibrated force and mirror displacement solver, calibrated force and displacement that each correction actuator 4 should apply are calculated, and will
It passes to correction actuator control 7；Then, actuator control 7 is corrected to be obtained according to the solution of active thermal optical controller 6
Margin or displacement send control instruction to correction actuator driver 8, pass through this in above calculating process in addition
The existing calculation formula in field can obtain result of calculation, and finally, correction actuator driver 8 drives correction actuator 4 to generate
Calibrated force or displacement is specified to act on the first speculum 1 and the second speculum 2, to complete the face shape of the first speculum 1 and the
The control and correction of the displacement of two-mirror 2.
Merely illustrating the principles of the invention described in above-described embodiment and specification and most preferred embodiment, this is not being departed from
On the premise of spirit and scope, various changes and modifications of the present invention are possible, and these changes and improvements both fall within requirement and protected
In the scope of the invention of shield.
Claims (9)
- A kind of 1. space active thermal optical system, it is characterised in that：The space active thermal optical system includes：First speculum and the second speculum, first speculum and the second speculum are separately positioned on the both ends of lens barrel；Multiple temperature sensors, it is distributed on the first speculum, the second speculum and lens barrel；Multiple correction actuators, it is multiple correction actuators in a part correction actuator be located on the first speculum, multiple corrections Another part correction actuator is located on the second speculum in actuator；Active thermal optical controller, electrically connected respectively with multiple temperature sensors and correction actuator control；Actuator driver is corrected, is electrically connected respectively with correction actuator control and multiple correction actuators；Wherein described master Hot optical controller is moved for temperature, the temperature of the second speculum of the first speculum detected according to multiple temperature sensors With the temperature of lens barrel, calibrated force and the displacement that each correction actuator should apply are obtained, by correcting actuator control Device exports the calibrated force and displacement and corrects actuator driver to described, and more by correcting actuator driver control It is individual to correct actuator to complete the displacement of the face shape of control and the first speculum of correction and the second speculum.
- 2. active thermal optical system in space as claimed in claim 1, it is characterised in that：Multiple correction actuators are arranged on described On the bottom of first speculum.
- 3. active thermal optical system in space as claimed in claim 2, it is characterised in that：Multiple correction actuators are arranged on described The bottom or side of second speculum.
- 4. active thermal optical system in space as claimed in claim 3, it is characterised in that：Multiple correction actuators are evenly distributed On the first speculum and the second speculum.
- 5. active thermal optical system in space as claimed in claim 1, it is characterised in that：First speculum and the second reflection Mirror is to be coaxially disposed either located off-axis, and the face shape of first speculum and the face shape of the second speculum are oppositely arranged.
- 6. active thermal optical system in space as claimed in claim 1, it is characterised in that：First speculum and the second reflection Mirror is arranged on the both ends of lens barrel by flexible structure respectively.
- 7. space active thermal optical system as claimed in any one of claims 1 to 6, it is characterised in that：Multiple temperature sensors Uniformly or non-uniformly it is distributed on the first speculum, the second speculum and lens barrel.
- 8. space active thermal optical system as claimed in any one of claims 1 to 6, it is characterised in that：Active thermal optics controls Device is additionally operable to：According to the temperature of the temperature of the first speculum, the temperature of the second speculum and lens barrel, the first reflecting mirror surface shape, first are obtained Spacing knots modification between the variable quantity of reflecting mirror surface shape and the first speculum and the second speculum；According to the first reflecting mirror surface shape, face shape error is obtained；Changed according to the face shape error, the variable quantity of the first reflecting mirror surface shape and the spacing of the first speculum and the second speculum Variable obtains each calibrated force that should apply of correction actuator and displacement with by multiple correction actuators movements second The second reflecting mirror surface shape of position and adjustment of speculum.
- 9. active thermal optical system in space as claimed in claim 8, it is characterised in that：First speculum and the second speculum it Between spacing knots modification include along optical axis direction and horizontal direction bias.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710915483.1A CN107783249B (en) | 2017-09-30 | 2017-09-30 | A kind of space active thermal optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710915483.1A CN107783249B (en) | 2017-09-30 | 2017-09-30 | A kind of space active thermal optical system |
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| CN107783249A true CN107783249A (en) | 2018-03-09 |
| CN107783249B CN107783249B (en) | 2019-11-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634372A (en) * | 2019-09-29 | 2019-12-31 | 中国科学院长春光学精密机械与物理研究所 | Optical system installation and adjustment strategy verification system |
| WO2023102309A1 (en) * | 2021-12-02 | 2023-06-08 | Plx, Inc. | Self-aligning active retroreflector system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1760714A (en) * | 2005-09-02 | 2006-04-19 | 中国科学院国家天文台南京天文光学技术研究所 | The intelligence control system of displacement actuator in the large-scale astronomical telescope |
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2017
- 2017-09-30 CN CN201710915483.1A patent/CN107783249B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760714A (en) * | 2005-09-02 | 2006-04-19 | 中国科学院国家天文台南京天文光学技术研究所 | The intelligence control system of displacement actuator in the large-scale astronomical telescope |
Non-Patent Citations (2)
| Title |
|---|
| 胡小川等: "变形镜热变形及其对光束质量的影响分析", 《中国激光》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634372A (en) * | 2019-09-29 | 2019-12-31 | 中国科学院长春光学精密机械与物理研究所 | Optical system installation and adjustment strategy verification system |
| WO2023102309A1 (en) * | 2021-12-02 | 2023-06-08 | Plx, Inc. | Self-aligning active retroreflector system and method |
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| Publication number | Publication date |
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| CN107783249B (en) | 2019-11-05 |
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