CN103941393A - Optical wavefront error improvement system based on pupil discrete gating - Google Patents
Optical wavefront error improvement system based on pupil discrete gating Download PDFInfo
- Publication number
- CN103941393A CN103941393A CN201410155939.5A CN201410155939A CN103941393A CN 103941393 A CN103941393 A CN 103941393A CN 201410155939 A CN201410155939 A CN 201410155939A CN 103941393 A CN103941393 A CN 103941393A
- Authority
- CN
- China
- Prior art keywords
- wavefront
- discrete
- gating
- pupil
- optical
- 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
Abstract
An optical wavefront error improvement system based on pupil discrete gating is composed of an optical system main lens, a beam splitter, a wavefront detector, a discrete gating system and a scientific imaging camera, and further comprises a computer. The wavefront detector and the discrete gating system are connected through the computer. The computer is used for controlling the discrete gating system according to wavefront distortion information from the wavefront detector to carry out pupil discrete wavefront gating. Light entering the main lens is splitted into the two parts through the beam splitter; one part of light passes through the wavefront detector and serves as detection wavefront, and a wavefront signal is input to the computer and fed back to the discrete gating system; the other part of light directly enters the discrete gating system, the discrete gating system is used for controlling according to the wavefront signal and the control logic and carrying out the pupil discrete wavefront gating, and finally scientific images are obtained. The pupil discrete wavefront gating is achieved through the discrete gating system, and on the basis of keeping completeness of space frequency, the statistical performance of wavefront errors is improved.
Description
Technical field
The present invention relates to a kind of optical wavefront error based on the discrete gating of pupil and improve system, belong to active optics, the contour performance imaging field of adaptive optics, specifically improve system by the optical wavefront error before discrete gating system control wave.
Background technology
Along with appearance and the development of laser, microelectronics and computing machine, the function of optical instrument and quality have had obvious development and raising.But this effort only limits to improve instrument internal quality.But in actual astronomical sight, can be subject to gravity deformation, thermal deformation, the even very serious impact of atmospheric turbulence.Improve to greatest extent the spatial resolving power of ground In Astro-optical Systems so as to observe better the shape of celestial body and CONSTRUCTED SPECIFICATION on astronomer's dream and the target that astronomical instrument expert pursues.
Optical system, in the process of actual processing, installation, debugging, the traditional optical source of errors such as its temperature deformation, gravity deformation, mismachining tolerance, alignment error, optical design residual error, environmental impact exist all the time.Telescope is as in common In Astro-optical Systems, according to Rayleigh criterion, and its angular resolution α=1.22 λ/D, the wavelength that wherein λ is incident light wave, D is entrance pupil diameter.But in actual observation, telescopical resolution is relevant with local seeing and above-mentioned various optical aberrations source.For ground optical instrument, light wave, among the process of propagating, meets with turbulent atmosphere, can make its wavefront produce high time and space frequency distortion.For heavy caliber telescope, the factor that affects its resolution transforms and thinks dry length and correlation time for atmosphere from the bore of entrance pupil.Because the inside and outside dimensional variation of large air mass has the character of complicated nonstationary random process, the light that celestial body sends is distorted while passing through atmospheric envelope, finally makes telescope actual corners resolution cannot break through the restriction of the quiet degree of atmosphere and various optical aberrations.
Full-fledged to 20 century 70s due to basic technology, also due at aspects such as high resolution imaging observation and the transmission of high concentration degree laser energy to the demand that overcomes dynamic disturbance more urgently, the imagination of active optics and adaptive optics is achieved.
Active optics and adaptive optical technique are all the automatic control systems taking the wavefront on pupil face as research object, and difference is only the spatio-temporal frequency that emending frequency and aberration change.The most general, the most ripe active optics and the ADAPTIVE OPTICS SYSTEMS of development is corrector optical system at present, and its of paramount importance element is wave-front corrector and wavefront detecting device.The corrector ADAPTIVE OPTICS SYSTEMS that is used for proofreading and correct atmospheric turbulence is a closed-loop system, from the fuzzy image forming through interference such as atmospheric turbulences of observed object, measure Wave-front phase distortion by wavefront detecting device, its wave-front corrector is generally distorting lens, distorting lens is the thin mirror surface of the regular some motor drivers of arranging in the back side, the face shape of distorting lens determines the Wave-front phase of the light beam being penetrated by distorting lens, and the face shape of distorting lens is by the Control of Voltage of driver, the variation of voltage comes from the signal of wavefront detecting device.
Current active optics and ADAPTIVE OPTICS SYSTEMS, on distorting lens, need to drop into very many, and because external restriction, the distorting lens of increasing bore and resolution is also had any problem, and optical wavefront error based on the discrete gating of pupil is improved system, realize the discrete gating of wavefront pupil by discrete gating system, keeping on the basis that spatial frequency is complete as far as possible, can effectively save cost, reduce system complex degree, improve the statistic property of wavefront error, improve original wavefront error of optical system, the other shortcut of wavefront error improvement method except active optics and adaptive optics.
Summary of the invention
This programme problem to be solved: overcome wave-front corrector in existing adaptive optics too complexity, high cost, be difficult to the deficiency that obtains, propose a kind of optical wavefront error in the discrete gating of pupil and improve system, realize the discrete gating of wavefront pupil by discrete gating system, keeping on the basis that spatial frequency is complete as far as possible, effectively improve the statistic property of wavefront error, improved original wavefront error of optical system.
The solution of this technological invention is: a kind of optical wavefront error based on the discrete gating of pupil is improved system, is made up of the optical system primary mirror of arranging according to light path, spectroscope, wavefront detecting device, discrete gating system and science imaging camera; Described optical wavefront error is improved system and is also provided with computing machine, described wavefront detecting device and discrete gating system are all connected with computing machine, described computing machine for according to from the wavefront distortion information of wavefront detecting device control discrete gating system to pupil discrete wave before gating; The light that enters primary mirror is divided into two parts by spectroscope, and a part, via wavefront detecting device, as detecting wavefront, and is input to wavefront signals in computing machine, feeds back in discrete gating system; Another part directly enters discrete gating system, and described discrete gating system, for controlling according to wavefront signals and steering logic, carries out the gating before pupil discrete wave, then finally obtains science imaging.
Whether wavefront detecting device detects the distortion before pupil discrete wave, and then computing machine is processed wavefront, judge wavefront and meet the requirements, then control the switch of shutter or DMD micro minor plate, finally realizes the improvement of system performance and the raising of science imaging resolution.
As a kind of specific implementation of the present invention: described discrete gating system is made up of the first lens of arranging along light path, shutter array and the second lens.
As another kind of specific implementation of the present invention: first lens, DMD system and the second lens composition that described discrete gating system is arranged along light path.
As a further improvement on the present invention, described computing machine by the discrete wave of wavefront matching and the threshold value that sets in advance before good and bad decision logic or algorithm, judge satisfactory wavefront and undesirable wavefront.
The present invention's advantage is compared with prior art: in keeping high real-time, by replacing, cost is high, control is complicated, be difficult to large-scale production, be difficult to obtain the high-resolution distorting lens of large scale, transfers to replace with shutter array or DMD cheap, technology maturation; First, realize the gating of discrete pupil wavefront by discrete gating system, can keep on basis that spatial frequency is complete as far as possible, effectively improve the statistic property of wavefront error, improve original wavefront error of optical system and the performance of optical system, conventionally can obtain the performance of the conventional high-resolution system that matches in excellence or beauty; Secondly, compared with distorting lens, the cost of shutter array or DMD system undoubtedly can be cheaper than complicated distorting lens, the correction control of high temporal frequency is simpler, technical development is more ripe, size can do more, cell resolution does more, also can control in temporal frequency and proofread and correct faster, product and more easily obtain, use discrete gating system, can greatly reduce the complicacy of system, reduce required cost and cost, real-time is high, safeguard that easily feasibility is high; The 3rd, shutter array or DMD system do not have theoretical and the engineering development upper limit in size and resolution; Four, the gating before the pupil discrete wave in the present invention, compared with the steering logic such as wavefront reconstruction, the matching algorithm of the high-resolution system such as conventional adaptive optics, logical algorithm is also more simply faster, more easily realizes; The 5th, there is a lot of limitation such as height, steering logic complexity and the limited range of application of height, spatial frequency of height, the temporal frequency of size, the resolution of power, the bore of length, the atmospheric turbulence of wave band different from conventional high-resolution system applies, the present invention, that a kind of universal wavefront improves system, can expanded application in most optical systems, no matter static high spatial frequency error or dynamic high temporal frequency error or both combinations, by calculating and controlling, all can realize the improvement of wavefront error and the lifting of performance; The 6th, the present invention, can serial access or parallel access among conventional high-resolution system or afterwards, further improving performance on the basis of realizing at traditional high-resolution.
Brief description of the drawings
Be described further below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram that the optical wavefront error based on the discrete gating of pupil of embodiment 1 is improved system.
Fig. 2 is the schematic diagram that the optical wavefront error based on the discrete gating of pupil of embodiment 2 is improved system.
Fig. 3 is the schematic diagram of the DMD system in shutter array or embodiment 2 in the embodiment of the present invention 1.
Fig. 4 is that the gating of the discrete gating system after 1 and 2 pairs of discrete pupil wavefront gatings of embodiment distributes.
In figure: 1-optical system primary mirror, 2-spectroscope, 3-wavefront detecting device, 4-first lens, 5-shutter array, 5 '-DMD system, 6-the second lens, 7-science imaging camera.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of optical wavefront error based on the discrete gating of pupil is improved system 10, by forming by the tactic optical system primary mirror 1 in front and back, spectroscope 2, wavefront detecting device 3, first lens 4, shutter array 5, the second lens 6 and science imaging camera 7; Optical wavefront error is improved system and is also provided with computing machine (not shown), wavefront detecting device 3 and shutter array 5 are all connected with computing machine, computing machine for according to from the wavefront distortion information of wavefront detecting device 3 control shutter array 5 to pupil discrete wave before gating.Spectroscope 2 is arranged between primary mirror 1 and primary mirror focal plane, and shutter array 5 is arranged on the emergent pupil place of optical imaging system, the position between first lens 5 and the second lens 6.First lens 4, shutter array 5 and the second lens 6 form discrete gating system 8.
The index path of native system is as shown in Figure 1: enter optical system primary mirror 1 from the light of observed objects, by spectroscope 2, light is divided into two bundles, reflected light A and transmitted light B.Utilizing emitted light A converges in wavefront detecting device 3, is used for carrying out the detection to wavefront error.First lens 4 is used for transmitted light B to collimate, transmitted light B after collimation, enter be placed on emergent pupil place shutter array system 5(as shown in Figure 3), by shutter array to pupil discrete wave before gating, the wavefront after correction enters science imaging camera, thereby obtains the wavefront of final improvement.Shutter array 5 shown in Fig. 3 is made up of shutter close-packed arrays, and each shutter is opened and closed by electric system and controls, thereby realizes the gating to discrete pupil wavefront.Also Fig. 3 can be regarded as to the DMD system in embodiment 2.
Whether wavefront detecting device 3 detects the distortion before pupil discrete wave, and then computing machine is processed wavefront, judge wavefront and meet the requirements, then control the switch of shutter array, finally realizes the improvement of system performance and the raising of science imaging resolution.
Embodiment 2
The composition of the present embodiment is similar to Example 1, just shutter array 5 in embodiment 1 has been changed into DMD system 5 '.First lens 4, DMD system 5 ' and the second lens 6 form discrete gating system 8.
Conventional DMD system is developed by Texas company of the U.S., adopts microelectron-mechanical principle, is a kind of digital light modulator of binary digital signal control.Its surface distributed has compact arranged square micro minor plate, can do along its diagonal axis ± 12 ° of upsets of each micro minor plate, and toggle frequency can reach thousands of hertz.In the time of deflection+12 °, micro-reflector is in opening state, by light reflection to objective optics system; In the time of deflection-12 °, micro-reflector, in off status, goes out optical system by light reflection.
Native system by optical system primary mirror 1, spectroscope 2, wavefront detecting device 3, first lens 4, DMD system 5 ', the second lens 6, science imaging camera 7 form.Spectroscope is arranged between primary mirror 1 and primary mirror focal plane, DMD system 5 ' the be arranged on emergent pupil place of imaging system, the second lens be arranged on DMD system 5 ' and science imaging camera 7 between.
The index path of native system is as shown in Figure 2: enter optical system primary mirror 1 from the light of observed objects, by spectroscope 2, light is divided into two bundles, reflected light A and transmitted light B.Utilizing emitted light A converges in wavefront detecting device 3, is used for carrying out the detection to wavefront error.First lens 4 is used for transmitted light B to collimate, and transmitted light B enters DMD system 5 ' (as shown in Figure 3) that is placed on emergent pupil place after collimation, by DMD system 5 ' to gating before pupil discrete wave.For satisfactory wavefront, the micro-reflector on DMD, in opening state, reflexes to the second lens 6 places by wavefront, then enters science imaging camera, obtains the final wavefront improving; For undesirable wavefront, micro minor plate is in off status, and wavefront is reflected optical system.
In this system, wavefront detecting device 3 was all connected with computing machine with DMD system 5 ' (as shown in Figure 3), the effect of computing machine is: the wavefront signals of being surveyed by wavefront detecting device 3 is processed, draw the information of wavefront distortion, by wavefront matching, good and bad decision logic or algorithm before the multiple discrete wave such as the threshold value setting in advance, judge satisfactory wavefront and undesirable wavefront, then the information of wavefront is fed back to DMD control system, control DMD system 5 ' Push And Release, obtaining the gating of certain discrete pupil as shown in Figure 4 distributes, remove before undesirable discrete wave, thereby the improvement that realizes wavefront is proofreaied and correct.
What the present invention did not elaborate belongs to techniques well known.
Claims (4)
1. the optical wavefront error based on the discrete gating of pupil is improved system, it is characterized in that, described optical wavefront error is improved system and is made up of the optical system primary mirror of arranging according to light path, spectroscope, wavefront detecting device, discrete gating system and science imaging camera; Described optical wavefront error is improved system and is also provided with computing machine, described wavefront detecting device and discrete gating system are all connected with computing machine, described computing machine for according to from the wavefront distortion information of wavefront detecting device control discrete gating system to pupil discrete wave before gating; The light that enters primary mirror is divided into two parts by spectroscope, and a part, via wavefront detecting device, as detecting wavefront, and is input to wavefront signals in computing machine, feeds back in discrete gating system; Another part directly enters discrete gating system, and described discrete gating system, for controlling according to wavefront signals and steering logic, carries out the gating before pupil discrete wave, then finally obtains science imaging.
2. optical wavefront error according to claim 1 is improved system, it is characterized in that, described discrete gating system is made up of the first lens of arranging along light path, shutter array and the second lens.
3. optical wavefront error according to claim 1 is improved system, it is characterized in that, first lens, DMD system and the second lens composition that described discrete gating system is arranged along light path.
4. optical wavefront error according to claim 1 is improved system, it is characterized in that, described computing machine by the discrete wave of wavefront matching and the threshold value that sets in advance before good and bad decision logic or algorithm, judge satisfactory wavefront and undesirable wavefront.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410155939.5A CN103941393B (en) | 2014-04-17 | 2014-04-17 | A kind of optical wavefront error based on the discrete gating of pupil improves system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410155939.5A CN103941393B (en) | 2014-04-17 | 2014-04-17 | A kind of optical wavefront error based on the discrete gating of pupil improves system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103941393A true CN103941393A (en) | 2014-07-23 |
| CN103941393B CN103941393B (en) | 2016-08-24 |
Family
ID=51189128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410155939.5A Expired - Fee Related CN103941393B (en) | 2014-04-17 | 2014-04-17 | A kind of optical wavefront error based on the discrete gating of pupil improves system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103941393B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317413A (en) * | 1993-05-07 | 1994-11-15 | Fuji Photo Optical Co Ltd | Interferometer device for inspecting optical member |
| US20030210383A1 (en) * | 2002-05-10 | 2003-11-13 | Bjorklund Gary C. | Maskless conformable lithography |
| US6707020B1 (en) * | 1999-12-28 | 2004-03-16 | Mza Associates Corporation | Adaptive dynamic range wavefront sensor |
| CN102429636A (en) * | 2011-09-30 | 2012-05-02 | 中国科学院长春光学精密机械与物理研究所 | Crystal liquid self-adaptive optical fundus imaging system with large field of view |
-
2014
- 2014-04-17 CN CN201410155939.5A patent/CN103941393B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317413A (en) * | 1993-05-07 | 1994-11-15 | Fuji Photo Optical Co Ltd | Interferometer device for inspecting optical member |
| US6707020B1 (en) * | 1999-12-28 | 2004-03-16 | Mza Associates Corporation | Adaptive dynamic range wavefront sensor |
| US20030210383A1 (en) * | 2002-05-10 | 2003-11-13 | Bjorklund Gary C. | Maskless conformable lithography |
| CN102429636A (en) * | 2011-09-30 | 2012-05-02 | 中国科学院长春光学精密机械与物理研究所 | Crystal liquid self-adaptive optical fundus imaging system with large field of view |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103941393B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109031654A (en) | A kind of adaptive optics bearing calibration and system based on convolutional neural networks | |
| CN110954966B (en) | Planar photoelectric detection system based on superlens array | |
| CN105589210B (en) | A kind of digitlization synthetic aperture imaging method based on pupil modulation | |
| CN104350732A (en) | Imaging device | |
| CN105892025A (en) | Projection optical system | |
| CN103558684B (en) | Aperture synthesis high-resolution imaging mounting of telescope based on bright source | |
| CN103901617A (en) | Wavefront detection-free adaptive optical system based on model | |
| CN112212977B (en) | High-speed high-resolution high-precision ultrahigh-temperature molten pool temperature field online monitoring device and method | |
| US9625726B2 (en) | Lens array-based illumination for wafer inspection | |
| US20220171204A1 (en) | Light field-based beam correction systems and methods | |
| Li et al. | Microlens assembly error analysis for light field camera based on Monte Carlo method | |
| RU171360U1 (en) | Scanning device based on Nipkov disk with subdiffraction resolution in millimeter, terahertz, infrared and optical wavelength ranges | |
| RU2400784C1 (en) | Infrared objective lens with two fields of vision and remote aperture diaphragm | |
| Choudhury et al. | Simultaneous enhancement of scanning area and imaging speed for a MEMS mirror based high resolution LiDAR | |
| CN104155000A (en) | Linearity gradual change optical filter type multispectral imaging instrument based on secondary imaging | |
| CN103941393A (en) | Optical wavefront error improvement system based on pupil discrete gating | |
| CN111538033A (en) | Active illumination associated imaging emission system and active illumination associated imaging system | |
| CN111399211A (en) | Large-field-of-view high-resolution imaging telescope for sun based on deformed secondary mirror | |
| CN103558160A (en) | Method and system for improving resolution ratio of spectral imaging space | |
| Schatz et al. | Design of the MagAO-X pyramid wavefront sensor | |
| Rabien et al. | Status of the ARGOS project | |
| CN212694044U (en) | Associated imaging detection device and system | |
| CN114076670A (en) | Splicing main mirror common-phase error detection method and system and storage medium | |
| Xie et al. | Restoration of sparse aperture images using spatial modulation diversity technology based on a binocular telescope testbed | |
| CN113900079A (en) | Compensation correction device and method for all-optical ultrafast imaging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20180417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |