CN104267745A - Large-caliber ultra-thin self-adaptation secondary mirror control method - Google Patents
Large-caliber ultra-thin self-adaptation secondary mirror control method Download PDFInfo
- Publication number
- CN104267745A CN104267745A CN201410499332.9A CN201410499332A CN104267745A CN 104267745 A CN104267745 A CN 104267745A CN 201410499332 A CN201410499332 A CN 201410499332A CN 104267745 A CN104267745 A CN 104267745A
- Authority
- CN
- China
- Prior art keywords
- secondary mirror
- voice coil
- control method
- ultra
- coil motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Telescopes (AREA)
Abstract
The embodiment of the invention discloses a large-caliber ultra-thin self-adaptation secondary mirror control method which is applied to a telescope large-caliber ultra-thin mirror plane system provided with a secondary mirror. The large-caliber ultra-thin self-adaptation secondary mirror control method includes the following steps that a plurality of coated capacitors and voice coil motors corresponding to the coated capacitors in a one-to-one mode are arranged on the secondary mirror; the capacitance, representing the secondary mirror deformation quantity, of the coated capacitors of the secondary mirror is measured according to a certain frequency; mirror plane deformation information is analyzed according to the capacitance representing the secondary mirror deformation quantity, and control current is generated and converted into a digital control signal; the sucking force of the voice coil motors is controlled by controlling the connecting current on the voice coil motors through the digital control signal, and therefore a secondary mirror plane shape is controlled. According to the large-caliber ultra-thin self-adaptation secondary mirror control method, the voice coil motors serve as supporting actuator elements, the deformation of the secondary mirror is reflected by arranging the coated capacitors, compared with a traditional self-adaptation optical control method, a non-contact mirror plane supporting manner is adopted, the stroke is larger, frequency is higher, a hysteresis effect does not exist, and the large-caliber ultra-thin self-adaptation secondary mirror control method can be used for supporting of ultra-thin mirror planes with larger calibers.
Description
Technical field
The invention belongs to electronic information technical field, particularly a kind of heavy caliber ultra-thin self-adaptation secondary mirror control method.
Background technology
In order to explore darker universe, modern telescope demand for development telescope bore is increasing, and require more and more higher to telescopical optical efficiency, the research of the ultra-thin minute surface of heavy caliber also more and more obtains the attention of people.Along with the development of adaptive optics, the ultra-thin minute surface of heavy caliber is just becoming the emphasis of world today astronomer research, has very high research and practical value.Traditional ADAPTIVE OPTICS SYSTEMS needs to build extra optical component, conjugate image that is that be used for a formation telescope entrance pupil or an atmospheric disturbance.Within 1989, J.M.Beckers is in the portion application of giving American National optical observatory, proposes the existing telescope secondary mirror of use one first and is used for correcting atmospheric scattering as wavefront correction mechanism.Because self-adaptation secondary mirror does not need additionally to introduce optical element, so compare traditional adaptive system have obvious advantage, first greatly reduce the quantity of reflection or transmission plane, improve telescopical efficiency; Secondly the ir scattering of self-adaptation secondary mirror system is very little, and this is very important in the observation of infrared band to optical system; Self-adaptation secondary mirror system does not have extra optical polarization in addition, can obviously improve optical system picture element; Build large aperture telescope, self-adaptation secondary mirror system is absolutely necessary a part, but the secondary mirror bore of large aperture telescope is general comparatively large, how supporting with high frequency correction minute surface face type is the key scientific problems faced in the ultra-thin self-adaptation secondary mirror design of heavy caliber.
Therefore, for the above-mentioned defect existed in currently available technology, be necessary to study in fact, to provide a kind of scheme, high speed detection is carried out to the secondary mirror type of heavy caliber, and utilizes control method to correct in real time secondary mirror, make secondary mirror type maintain a suitable deformation values all the time.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of heavy caliber ultra-thin self-adaptation secondary mirror control method, for utilizing voice coil motor (Voice Coil) as supporting actuator element, the mode that painting electric capacity is set is adopted to react secondary mirror deformation, compare with traditional adaptive optics control method, adopt contactless mirror support mode stroke larger, frequency is higher, there is no hysteresis effect, can be used in the support of more bigbore ultra-thin minute surface.
For achieving the above object, technical scheme of the present invention is:
A kind of heavy caliber ultra-thin self-adaptation secondary mirror control method, is applied to the telescope heavy caliber ultra-thin mirror plane system being provided with secondary mirror, comprises the following steps:
Secondary mirror is arranged multiple painting electric capacity and with its voice coil motor one to one;
The electric capacity size of the secondary mirror painting electric capacity of secondary mirror deformation quantity is characterized according to certain frequency measurement;
Carry out analysis according to the electric capacity size characterizing secondary mirror deformation quantity to minute surface deformation data produce control size of current and convert digital controlled signal to;
Control On current size mode on voice coil motor according to digital controlled signal control the suction-combining force of voice coil motor thus control secondary mirror type.
Preferably, the concrete set-up mode of described painting electric capacity is, in the pole of plating layer of metal film in the thin mirror surface back side of secondary mirror as electric capacity, the devitrified glass reference substrate after the minute surface of secondary mirror plates another layer of metal film another pole as electric capacity, the distance between two poles is 0.05mm-0.15mm.
Preferably, the concrete set-up mode of described voice coil motor is, one block of magnet binds on secondary mirror face, and voice coil motor is fixed on the devitrified glass reference substrate directly over it, and in magnet and voice coil motor, interval is empty, and distance is 0.05mm-0.15mm.
Preferably, describedly control On current size mode on voice coil motor according to digital controlled signal and control the suction-combining force of voice coil motor thus control secondary mirror type and be specially,
Digital controlled signal is converted to the first voltage signal;
By the first voltage signal through voltage follow isolation and amplifier second voltage;
Convert the second voltage signal to current signal and input to voice coil motor two ends;
Adopt the real work electric current of precision resistance sampling voice coil motor, carry out gathering thus obtain real size of current, and main control module expects that wanting the control size of current produced to compare carries out further accurately controlling.
Preferably, digital controlled signal being converted to the first voltage signal adopts 16 figure place weighted-voltage D/A converter AD5668 to be master chip.
Preferably, high speed operation amplifier OPA890 is adopted to be master chip through voltage follow isolation and amplifier second voltage the first voltage signal.
Preferably, the second voltage signal is converted to current signal to input to voice coil motor two ends and adopt low pressure paster field effect transistor FDS9926 to be master chip.
Preferably, the real work electric current of precision resistance sampling voice coil motor is adopted to adopt 16 analog to digital converter AD7694 to be master chip.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) carry out secondary mirror type detection by arranging multiple painting electric capacity, the variable quantity being coated with electric capacity reacts the deformation quantity of secondary mirror accurately;
(2) each position being coated with electric capacity arranges a voice coil motor and adjusts secondary mirror type, make face type adjustment accurately;
(3) adopt integrated chip mode to carry out secondary mirror type to detect and secondary mirror adjustment, make the accuracy of control high, avoid greatly to introduce and measure and alignment error.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the heavy caliber ultra-thin self-adaptation secondary mirror control method of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
On the contrary, the present invention is contained any by the substituting of making on marrow of the present invention and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the present invention, in hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.
See Fig. 1, be depicted as the flow chart of steps of a kind of heavy caliber ultra-thin self-adaptation secondary mirror control method of the embodiment of the present invention, be applied to the telescope heavy caliber ultra-thin mirror plane system being provided with secondary mirror, comprise the following steps:
S10, secondary mirror is arranged multiple painting electric capacity and with its voice coil motor one to one;
S20, characterizes the electric capacity size of the secondary mirror painting electric capacity of secondary mirror deformation quantity according to certain frequency measurement;
S30, carries out analysis according to the electric capacity size characterizing secondary mirror deformation quantity to minute surface deformation data and produces control size of current and convert digital controlled signal to;
S40, controls On current size mode on voice coil motor according to digital controlled signal and controls the suction-combining force of voice coil motor thus control secondary mirror type.
Self-adaptation secondary mirror (adaptive secondary) thickness is generally 2mm, diameter is generally at more than 500mm, secondary mirror minute surface is that real-time correction air is on the impact of light path, minute surface needs to change face type fast with very high frequency (generally at more than 1KHz), minute surface employs a lot of voice coil motor actuators (voice coil actuators) and supports, actuator needs the power that provides very little, general at below 1N, the frequency just wanting power to change will reach very high frequency.By the heavy caliber of the embodiment of the present invention arranged above ultra-thin self-adaptation secondary mirror control method, when being arranged on the deformation of the painting electric capacity on secondary mirror with secondary mirror and producing deformation, the large young pathbreaker of electric capacity that secondary mirror is coated with electric capacity changes, now measure electric capacity, and electric capacity and standard electric capacity are carried out contrasting and then producing needs, calculate the row variable of secondary mirror and send drive control signal to secondary mirror Circuit tuning, secondary mirror Circuit tuning output current drives voice coil motor to compensate the deformation of secondary mirror painting electric capacity, before making secondary mirror shape return to deformation.
In a particular embodiment, the concrete set-up mode being coated with electric capacity is, in the pole of plating layer of metal film in the thin mirror surface back side of secondary mirror as electric capacity, devitrified glass reference substrate after the minute surface of secondary mirror plates another layer of endless metal film another pole as electric capacity, the distance between two poles is 0.05mm-0.15mm.Such as, in an instantiation, if spacing d=0.1mm between substrate and minute surface, substrate side ring plate, internal diameter 12mm, external diameter 18mm.Then polar plate area S=141.372mm
2, consider in atmosphere, relative dielectric constant ε
r=1.00058986, permittivity of vacuum ε
0=8.854187817620 × 10
-12fm
-1, under can obtaining standard state, the electric capacity of single capacitive transducer is:
When the spacing of substrate and minute surface changes 10nm, calculate capacitance change and be about 0.001pF.
In instantiation, the concrete set-up mode of voice coil motor is, one block of magnet binds on secondary mirror face, and voice coil motor is fixed on the devitrified glass reference substrate directly over it, and in magnet and voice coil motor, interval is empty, and distance is 0.05mm-0.15mm.When have in the electromagnet of upper end electric current by time, produce magnetic field the suction-combining force, thus produce adhesive lower end, magnetic field magnet and control minute surface face type, electric current is larger, and the suction-combining force is also larger.
In embody rule example, control On current size mode on voice coil motor according to digital controlled signal and control the suction-combining force of voice coil motor thus control secondary mirror type and can be,
S401, converts the first voltage signal to by digital controlled signal, digital controlled signal is converted to the first voltage signal and adopt 16 figure place weighted-voltage D/A converter AD5668 to be master chip.
S402, by the first voltage signal through voltage follow isolation and amplifier second voltage, adopts high speed operation amplifier OPA890 to be master chip through voltage follow isolation and amplifier second voltage the first voltage signal.
S403, converts the second voltage signal to current signal and inputs to voice coil motor two ends, the second voltage signal is converted to current signal and inputs to voice coil motor two ends and adopt low pressure paster field effect transistor FDS9926 to be master chip.
S404, adopts the real work electric current of precision resistance sampling voice coil motor, carries out gathering thus obtain real size of current, and main control module expects that wanting the control size of current produced to compare carries out further accurately controlling.The real work electric current of precision resistance sampling voice coil motor is adopted to adopt 16 analog to digital converter AD7694 to be master chip.
After the thermomechanical processing of the face of acquisition type, contrast with standard value, calculate the size of current needing to provide electromagnet.Produce control voltage by control DAC, through isolation, be added to electromagnet two ends.Because electromagnetism has blocked impedance, so change in voltage electric current also respective change.This electric current is provided through MOS by 5V voltage source.In order to can more precisely control, also specially add one-level ADC voltage acquisition gather voice coil motor both end voltage thus obtain real size of current, want the electric current produced to compare with expection, further control, and then accurately control secondary mirror deformed state.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a heavy caliber ultra-thin self-adaptation secondary mirror control method, is applied to the telescope heavy caliber ultra-thin mirror plane system being provided with secondary mirror, it is characterized in that, comprise the following steps:
Secondary mirror is arranged multiple painting electric capacity and with its voice coil motor one to one;
The electric capacity size of the secondary mirror painting electric capacity of secondary mirror deformation quantity is characterized according to certain frequency measurement;
Carry out analysis according to the electric capacity size characterizing secondary mirror deformation quantity to minute surface deformation data produce control size of current and convert digital controlled signal to;
Control On current size mode on voice coil motor according to digital controlled signal control the suction-combining force of voice coil motor thus control secondary mirror type.
2. heavy caliber according to claim 1 ultra-thin self-adaptation secondary mirror control method, it is characterized in that, the concrete set-up mode of described painting electric capacity is, in the pole of plating layer of metal film in the thin mirror surface back side of secondary mirror as electric capacity, devitrified glass reference substrate after the minute surface of secondary mirror plates another layer of metal film another pole as electric capacity, the distance between two poles is 0.05mm-0.15mm.
3. heavy caliber according to claim 1 and 2 ultra-thin self-adaptation secondary mirror control method, it is characterized in that, the concrete set-up mode of described voice coil motor is, one block of magnet binds on secondary mirror face, voice coil motor is fixed on the devitrified glass reference substrate directly over it, in magnet and voice coil motor, interval is empty, and distance is 0.05mm-0.15mm.
4. heavy caliber according to claim 1 and 2 ultra-thin self-adaptation secondary mirror control method, is characterized in that, describedly controls On current size mode on voice coil motor according to digital controlled signal and controls the suction-combining force of voice coil motor thus control secondary mirror type and be specially,
Digital controlled signal is converted to the first voltage signal;
By the first voltage signal through voltage follow isolation and amplifier second voltage;
Convert the second voltage signal to current signal and input to voice coil motor two ends;
Adopt the real work electric current of precision resistance sampling voice coil motor, carry out gathering thus obtain real size of current, and main control module expects that wanting the control size of current produced to compare carries out further accurately controlling.
5. heavy caliber according to claim 4 ultra-thin self-adaptation secondary mirror control method, is characterized in that, digital controlled signal is converted to the first voltage signal and adopts 16 figure place weighted-voltage D/A converter AD5668 to be master chip.
6. heavy caliber according to claim 4 ultra-thin self-adaptation secondary mirror control method, is characterized in that, adopts high speed operation amplifier OPA890 to be master chip the first voltage signal through voltage follow isolation and amplifier second voltage.
7. heavy caliber according to claim 4 ultra-thin self-adaptation secondary mirror control method, is characterized in that, the second voltage signal is converted to current signal and inputs to voice coil motor two ends and adopt low pressure paster field effect transistor FDS9926 to be master chip.
8. heavy caliber according to claim 4 ultra-thin self-adaptation secondary mirror control method, is characterized in that, adopts the real work electric current of precision resistance sampling voice coil motor to adopt 16 analog to digital converter AD7694 to be master chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410499332.9A CN104267745B (en) | 2014-09-26 | 2014-09-26 | Mirror plane control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410499332.9A CN104267745B (en) | 2014-09-26 | 2014-09-26 | Mirror plane control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104267745A true CN104267745A (en) | 2015-01-07 |
| CN104267745B CN104267745B (en) | 2017-02-15 |
Family
ID=52159273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410499332.9A Expired - Fee Related CN104267745B (en) | 2014-09-26 | 2014-09-26 | Mirror plane control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104267745B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712055A (en) * | 2018-04-26 | 2018-10-26 | 中国科学院国家天文台南京天文光学技术研究所 | Voice coil motor for the adaptive distorting lens of heavy caliber |
| CN109239911A (en) * | 2018-07-12 | 2019-01-18 | 中国科学院国家天文台南京天文光学技术研究所 | Adaptive subaperture based on electric eddy current measurement controls equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2783352Y (en) * | 2005-03-04 | 2006-05-24 | 中国科学院国家天文台南京天文光学技术研究所 | Sub-lens self-adaption positoing mechanism for astronmical telescope |
| US20090141347A1 (en) * | 2007-11-29 | 2009-06-04 | David Joseph Mehrl | Apparatus and Method for Using Voice Coils as Screen Motion Sensors |
| CN102928956A (en) * | 2012-11-26 | 2013-02-13 | 中国科学院长春光学精密机械与物理研究所 | Minitype rigid bearing type rapid reflecting mirror |
-
2014
- 2014-09-26 CN CN201410499332.9A patent/CN104267745B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2783352Y (en) * | 2005-03-04 | 2006-05-24 | 中国科学院国家天文台南京天文光学技术研究所 | Sub-lens self-adaption positoing mechanism for astronmical telescope |
| US20090141347A1 (en) * | 2007-11-29 | 2009-06-04 | David Joseph Mehrl | Apparatus and Method for Using Voice Coils as Screen Motion Sensors |
| CN102928956A (en) * | 2012-11-26 | 2013-02-13 | 中国科学院长春光学精密机械与物理研究所 | Minitype rigid bearing type rapid reflecting mirror |
Non-Patent Citations (2)
| Title |
|---|
| R.ARSENAULT 等: ""A Deformable Secondary Mirror for the VLT"", 《PROC. OF SPIE》 * |
| 张玉方 等: ""用于薄镜面主动光学的音圈力促动器设计"", 《光学精密工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712055A (en) * | 2018-04-26 | 2018-10-26 | 中国科学院国家天文台南京天文光学技术研究所 | Voice coil motor for the adaptive distorting lens of heavy caliber |
| CN109239911A (en) * | 2018-07-12 | 2019-01-18 | 中国科学院国家天文台南京天文光学技术研究所 | Adaptive subaperture based on electric eddy current measurement controls equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104267745B (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jung et al. | Dynamically tunable hemispherical electronic eye camera system with adjustable zoom capability | |
| CN111133357A (en) | Optical lens assembly and electronic device with cross reference to related applications | |
| TWI676045B (en) | Image capturing apparatus | |
| CN107741295A (en) | A kind of MENS capacitive baroceptors test calibration device and method | |
| Sano et al. | An electret-augmented low-voltage MEMS electrostatic out-of-plane actuator for acoustic transducer applications | |
| CN102607701B (en) | Fourier transformation miniature spectrometer based on moving mirror of micro-electro-mechanical system | |
| CN110210349B (en) | Fingerprint sensor and mobile terminal | |
| CN106776826A (en) | A kind of update method, the apparatus and system of wrist-watch background picture | |
| CN104267745A (en) | Large-caliber ultra-thin self-adaptation secondary mirror control method | |
| CN103926475A (en) | Electric field measuring method and measuring system thereof | |
| CN103149682B (en) | Optically controlled deformable mirror device applied to wavefront phase calibration | |
| CN106249922A (en) | A kind of pointer | |
| WO2019127577A1 (en) | Optical sensing method for photosensitive device | |
| Bagolini et al. | High frequency MEMS capacitive mirror for space applications | |
| CN108535864A (en) | A kind of four component zooming telecentric optical system design methods | |
| CN109425366A (en) | A kind of analog signal processing circuit for active optics micro-displacement sensor | |
| Haus et al. | Robust Pressure Sensor in SOI Technology with Butterfly Wiring for Airfoil Integration | |
| CN115471917B (en) | Gesture detection and recognition system and method | |
| CN109117014A (en) | A kind of pressure correction method and system of capacitive pressure induction panel | |
| CN104267746B (en) | Mirror plane control system | |
| Tao et al. | Design and Construction of the Optical Bench Interferometer for the Taiji Program | |
| CN115523998A (en) | Vibration capacitance detection device, system and method and storage medium | |
| CN109186819A (en) | A kind of MEMS pressure sensor mould group | |
| CN110113066A (en) | A kind of the real-time noise calibration system and method for radio telescope system | |
| CN203858303U (en) | Electric field sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NANJING INST OF ASTROMICAL PHOTOTECHNOLOGY, STATE Effective date: 20150506 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zuo Heng Inventor after: Yu Haibin Inventor after: Huang Feng Inventor after: He Shufei Inventor after: Liu Jingbiao Inventor before: Ma Jun Inventor before: Huang Feng Inventor before: He Shufei |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: MA JUN HUANG FENG HE SHUFEI TO: ZUO HENG YU HAIBIN HUANG FENG HE SHUFEI LIU JINGBIAO |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20150506 Address after: 6, No. 600, No. 21, No. 310000, Xiasha economic and Technological Development Zone, Zhejiang, Hangzhou Province, 323 Applicant after: HANGZHOU MORUI ELECTROMECHANICAL SCIENCE & TECHNOLOGY CO., LTD. Applicant after: Nanjing Inst of Astromical Phototechnology, State Astraonomical Observatory, Chi Address before: 6, No. 600, No. 21, No. 310000, Xiasha economic and Technological Development Zone, Zhejiang, Hangzhou Province, 323 Applicant before: HANGZHOU MORUI ELECTROMECHANICAL SCIENCE & TECHNOLOGY CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20180926 |