CN109946712A - For being the synthetic aperture optical imagery pilot system of outer planet detection - Google Patents
For being the synthetic aperture optical imagery pilot system of outer planet detection Download PDFInfo
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Abstract
The optical synthesis aperture imaging test system that the invention discloses a kind of for being outer planet detection, comprising: the two beam directional lights that fixed star-planet light source analogy device output has certain angle difference, brightness different；Controllable bore diameter array includes multiple sub-apertures individually controlled；Focal imaging module converges the optical signal of controllable bore diameter array output, and is sent to micro-imaging module；Micro-imaging module generates and amplifies interferometric fringe signal, and is sent to data processing module；Data processing module recording interference fringe, and the through and off that controllable bore diameter array executes sub-aperture combination next time are controlled, changed with simulated baseline, after the UV covering that baseline variation is imaged enough, imaging resolving is carried out according to the interference fringe of record.The present invention introduces equivalent sub-aperture spatial movement using controllable bore diameter array, effectively reduces the complexity and cost of system simulation, while avoiding the extra error introduced in more mirror systems by face type difference.
Description
Technical field
The invention belongs to sparse aperture optical image technology fields, are related to a kind of optics synthesis for being outer planet detection
Aperture imaging pilot system is used for ground experiment.
Background technique
Whether the environment for finding suitable human survival other than the earth is always the dream of the mankind, have life to deposit other than the solar system
In the interested project of the always mankind.Nineteen ninety-five, Geneva, Switzerland system outer planet detect the Mayor and Queloz of group in class
Day fixed star (pegasus 51) nearby has found the planet of first Jupiter's mass magnitude, and human search has been opened in this great discovery
It is the prelude of outer planet.It is that the detection of outer planet and theoretical research have become International Astronomical with a large amount of discoveries for being outer planet
One of hot fields.
It is that outer planet detection method is divided into indirect detection and direct imaging.How general be that outer planet indirect detection method mainly has
Strangle radial velocity method, Ling Xingfa, microgravitational lens method, ring fixed star dust disk method, uranometry method, Pulsar timing method.Indirectly
Detection method can not obtain planet photon, and it is even more impossible to carry out spectrum analysis to planetary scale, whether therefore, it is difficult to deposit on planet
It is judged in life signal.Extrasolar planet direct imaging technology (i.e. photon of the direct detection from planet), will be expected to
The final detection realized to terrestrial planet, while can accurately observe the problem of viewing directional angle may be not present in the position of the planet
(can accurately know the information such as planetary orbit radius and quality), and be further that outer planet carries out spectrum point to what is taken
Analysis would know that planet composition, surface temperature whether there is the important informations such as life signal even on.
In direct imaging, in order to improve the angular resolution of imaging system, generally by increase system aperture, however it is
The increase in system aperture will receive the restriction of processing technology, while manufacturing cost also will increase dramatically, system processing cost and aperture
2.76 powers it is directly proportional, and limited by aircraft payload bay volume and launch mass, system aperture is not yet
May unlimitedly it expand, this makes to being that outer planet direct imaging is restricted.In order to overcome above-mentioned contradiction, optics synthesizes hole
Diameter imaging technique is proposed out, which obtains high-resolution imaging effect using multiple small-bore optical systems, small-bore
Optical system can be individual eyeglass, be also possible to independent optical system.It, can be with by changing the arrangement of sub-aperture
The flexibly optical transfer function of control optical synthesis aperture imaging system, it is that outer planet detection most development is latent that this method, which has become,
One of technique direction of power.
It is emulated currently, being related to optical synthesis aperture imaging test system using Computer Simulation or static ideal image.Meter
The emulation of calculation machine is the mathematical model using interference imaging, carries out simulation calculation, this method be merely capable of verifying imaging theory with
Method, static ideal image emulation are using the sub-aperture in preset mask plate analog imaging, and the light beam issued from light source passes through
The sub-aperture on mask plate is crossed, the interference at focusing telescope image planes generates interferemetrio pattern, then puts through micro- lens head
It is received after big by CCD camera, simulates point spread function intensity distribution in the ideal case.This experimental system does not consider
The case where movement, can not study influence of the change to imaging of baseline.
Synthetic aperture optical interference imaging faces two most important demands:
(1) demand of interference imaging method validation must be taken into consideration in the design of experimental system.From Optical synthesis aperture interference image original
Reason is set out, and it is big that Optical synthesis aperture interference image technology is related to closure phase technology, U-V soverlay technique and image reconstruction technique three
Key technology, the verifying that experimental system on land design is necessary for these key technologies provide experiment porch.In actual observation, it is based on
The considerations of needs and observation time of satellite collision avoidance design, when space interference is imaged, the bore of sub- telescope spreads out with what is realized
It penetrates bore corresponding to limiting resolution to compare, inevitable difference is very big, the very big optical synthesis aperture system of degree of rarefication, due to U-
V covering is not complete, and system inevitably lacks corresponding spatial frequency in sampling, therefore, in order to sub- mirror
Configuration design provides verification platform, when designing experimental system on land, it is necessary to consider the situation of sub- mirror movement.
(2) the problem of system complexity and realizability must be taken into consideration in the design of experimental system.For High precision reconstruction figure
Picture, the position precision for generally requiring each imaging subsystems need to reach 1/10 λ, and by taking 500nm blue light as an example, position precision is about
50nm, and if the beating degree of turntable can when the motion scheme of high precision turntable analog submodule mirror being added in experimental system on land
To reach the magnitude of several wavelength, this brings very high challenge, while but also light to the measurement of optical path difference and real-time compensation
Road system is extremely complex.With existing technical conditions, simulates the synthetic aperture light source interference experiment under static conditions and face heavy be stranded
Difficulty, simulate dynamic imaging processes difficulty be even more as one can imagine.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of synthetic aperture optical imagery test for being outer planet detection
System can emulate the radiation optical signal of extrasolar fixed star and planet, equivalent sub-aperture is introduced using controllable bore diameter array
Spatial movement, effectively reduces the complexity and cost of system simulation, while avoiding in more mirror systems because face type difference introduces
Extra error, solve problems of the prior art.
The technical scheme adopted by the invention is that a kind of optical synthesis aperture imaging test system for being outer planet detection
System characterized by comprising
Fixed star-planet light source analogy device, for exporting the two beam directional lights different with certain angle difference, brightness, simulation system
The optical signal that outer fixed star and planet generate；
Controllable bore diameter array, the optical signal generated for receiving fixed star-planet light source analogy device, including multiple sons individually controlled
Aperture；
Focal imaging module for converging the optical signal of controllable bore diameter array output, and is sent to micro-imaging module；
Micro-imaging module for generating and amplifying interferometric fringe signal, and is sent to data processing module；
Data processing module is used for recording interference fringe, and controls controllable bore diameter array and execute the logical of sub-aperture combination next time
With it is disconnected, changed with simulated baseline, after the UV covering that baseline variation is imaged enough, according to the interference fringe of record carry out at
As resolving, fixed star-planet light source image information is reconstructed.
Further, the data processing module uses FPGA+DSP combo architectures, the geometry for combining different sub-apertures
Arrangement is stored in advance and generates control instruction, and control instruction is sent to controllable bore diameter array according to certain time for exposure, with
Control corresponding sub-aperture combination through and off；Time for exposure determines according to the target source brightness of detection.
Further, the controllable bore diameter array uses liquid crystal array, and liquid crystal array includes multiple liquid crystal cells, the son
Aperture is liquid crystal cells, and two electrodes of each liquid crystal cells are powered or break according to the control instruction of controllable bore diameter array received
Electricity.
Further, the liquid crystal cells in the liquid crystal array use hexagon or circle.
Further, the fixed star-planet light source analogy device includes light source, and light source is set to the centre of sphere of integrating sphere, integrating sphere
Spherical surface be equipped with orthogonal first light hole, the second light hole, the second light hole connect with U-shaped sleeve one end, set
The cylinder other end is equipped with smallcolumn diaphragm, and attenuator is equipped in sleeve, and sleeve is interior to be successively arranged first in bending place along optical path direction
Plane mirror, the second plane mirror, Amici prism turns back the light that smallcolumn diaphragm and the first light hole export to plane mirror, through flat
Two secondary reflections of face reflecting mirror and off axis paraboloidal mirror export the two beam directional lights for having certain angle difference, brightness different.
Further, the light that the light and smallcolumn diaphragm that first light hole projects project enters the angle of Amici prism
Degree difference is less than 1 rad.
Further, the smallcolumn diaphragm is fixedly connected by Stop-motion lock with sleeve.
Further, the effective area of the controllable bore diameter array is equal to the light harvesting area of focal imaging module, every height
The area in aperture is the 1/1000 to 1/16 of light harvesting area.
Further, the focal imaging module uses convex lens, and the mismachining tolerance of face type requires control in 1/10 wavelength
Within.
Further, the controllable bore diameter array, focal imaging module, micro-imaging module are installed in vacuum Optical Dark Solitary Pulse
Interior, vacuum optical dark room are equipped with vacuum window, and the optical signal for allowing fixed star-planet light source analogy device to export penetrates and emits
To controllable bore diameter array, micro-imaging module is connect by the second vacuum sealing joint with data processing module, data processing mould
Block is connect by the first vacuum sealing joint with controllable bore diameter array；Fixed star-planet light source analogy device, vacuum optical dark room sum number
It is both placed on vibration-free tables according to processing module.
The invention has the advantages that the present invention is compared with conventional invention, the present invention has the advantage that
(1) introducing and moving equivalent, traditional experimental system on land is mostly static, because the simulation of movement can greatly increase
Technology complexity and economic cost, while can also introduce very more kinematic errors；And in the present invention, variable using programming
Array of apertures simulates the case of motion of Aerospace Satellite sub-aperture, different using the through and off of controllable bore diameter antenna array control sub-aperture
Sub-aperture combination can be equivalent to the spatial movement of sub-aperture, avoid because the movements simulation such as sub-aperture rotation, flexible causes
Vibration, mechanical surface jump, thermal environment etc. caused by error problem；Due to controllable bore diameter array be it is fixed, will not cause
Through the change of the light path of signal, additional optical path difference will not be brought because of movement, convenient for carrying out grinding for interference imaging algorithm
Study carefully, while also significantly reducing experimental cost.
(2) extra error introduced in more mirror systems by face type difference is avoided.In more mirror interference systems, each sub- mirror
Face type error can increase extra error to experimental system.In order to the imaging effect got well, it is desirable that optical device face type
Precision is better than 1/50 λ, so that process-cycle and economic cost are significantly increased.In the present invention, one group of focal imaging mould is used only
Block, under conditions of guaranteeing its surface precision, systematic error is efficiently controlled.
(3) more accurately simulated target light source.Traditional light source analogy is all directly to simulate single-point light using parallel light tube
Source, and the present invention proposes that the simulation that double light sources are realized by light mode of turning back, the output of fixed star-planet simulator are two beams
Directional light, rather than single beam directional light, wherein the radiant light of a branch of simulation planet, the radiant light of another beam simulation fixed star, contrast
It is high.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is fixed star in the embodiment of the present invention-planet light source analogy device structural schematic diagram.
Fig. 3 a is that controllable bore diameter array uses liquid crystal array circular in configuration figure in embodiment.
Fig. 3 b is that controllable bore diameter array uses liquid crystal array hexagonal configuration figure in embodiment.
In figure, 1. fixed stars-planet light source analogy device, 2. controllable bore diameter arrays, 21. liquid crystal cells, 3. focal imaging modules,
4. micro-imaging module, 5. data processing modules, 6. vacuum optical dark rooms, 7. vibration-free tables, 61. vacuum windows, 62. first vacuum
Seal nipple, 63. second vacuum sealing joints, 11. light sources, 12. integrating spheres, 13. first light holes, 14. second light holes,
15. attenuator, 16. first plane mirrors, 17. sleeves, 18. second plane mirrors, 19. Stop-motion locks, 110. smallcolumn diaphragms, 111. light splitting
Prism, 112. plane mirrors, 113. off axis paraboloidal mirrors.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The present invention be used for be outer planet detection synthetic aperture optical imagery pilot system, including fixed star-planet light source die
Quasi- device 1, for emulating the radiation optical signal of extrasolar fixed star and planet, contrast is high；Controllable bore diameter array 2 is for controlling son
The through and off in aperture, different sub-aperture combinations can be equivalent to the spatial movement of sub-aperture, and focal imaging module 3 is to will transmit through
The optical signal of controllable bore diameter array 2 converges to micro-imaging module 4, to be imaged, be amplified and be exported interference fringe, at data
Module 5 is managed according to interference fringe, reconstructs fixed star-planet light source image information.
The present invention is for being the synthetic aperture optical imagery pilot system of outer planet detection, as shown in Figure 1, including fixed star-
Planet light source analogy device 1, controllable bore diameter array 2, focal imaging module 3, micro-imaging module 4, data processing module 5, vacuum
Optical dark room 6 and vibration-free tables 7.
Fixed star-planet light source analogy device 1, for exporting the two beam directional lights different with certain angle difference, brightness, mould
The optical signal of quasi- system outer fixed star and planet generation.
Fixed star-planet light source analogy device 1 structure, as shown in Fig. 2, including light source 11, light source 11 is set to integrating sphere 12
The centre of sphere, 12 spherical surface of integrating sphere be equipped with orthogonal first light hole 13, the second light hole 14, the second light hole 14 with it is U-shaped
The connection of 17 one end of sleeve, 17 other end of sleeve is equipped with smallcolumn diaphragm 110, and smallcolumn diaphragm 110 passes through Stop-motion lock 19 and sleeve
17 are fixedly connected, and attenuator 15 is equipped in sleeve 17, and the bending place in sleeve 17 is successively arranged the first plane mirror along optical path direction
16, the second plane mirror 18, Amici prism 111 turn back the light that smallcolumn diaphragm 110 and the first light hole 13 export to plane reflection
Mirror 112, two secondary reflections through plane mirror 112 and off axis paraboloidal mirror 113, output have certain angle difference, brightness not
Two same beam directional lights, rather than single beam directional light, wherein the radiant light of a branch of simulation planet, the radiation of another beam simulation fixed star
Light；Attenuator 15 decays the optical signal that the second light hole 14 exports, attenuation coefficient according to fixed star-planet brightness ratio into
Row setting, by the attenuation coefficient of regulated attenuator 15, to simulate fixed star-planet luminance difference.After Amici prism 111
Two-beam is respectively by two secondary reflections of plane mirror 112 and off axis paraboloidal mirror 113, using this light of turning back reflective twice
Line, to reduce the volume of equipment and eliminate color difference.Traditional spherical mirror is under off-axis average operating, and there are sphere mappings
Difference, astigmatism, are the major reasons for causing optical splitter resolution ratio low, and by the way of off axis paraboloidal mirror, in principle
On these aberrations can be completely eliminated, in the short optical instrument of focal length, can also realize high-resolution.
The directional light of two beam minute angle differences of system simulation is light, the smallcolumn diaphragm projected by the first light hole 13
110 light projected enter the incident angle difference of Amici prism 111 to distinguish and guarantee, two-beam line enters Amici prism
111 angle needs to be designed according to demand, in order to the differential seat angle of effective simulation planet-stellar radiation signal,
The light of light, the injection of smallcolumn diaphragm 110 that one light hole 13 projects enters the differential seat angle of Amici prism 111 less than 1 rad.The
One plane mirror 16, the second plane mirror 18 make light enter smallcolumn diaphragm 110, can adjust two beam directional lights for optical path of turning back
Angle.
The light source provides input for pilot system, which includes the very small two beams directional light of angle, using single son
It is that two beam directional lights cannot be distinguished, by synthetic aperture imaging, i.e., the combination of multiple sub-apertures improves when aperture imaging
The angular resolution of imaging, so that two beam directional lights be distinguished.In other words, fixed star-planet light source analogy device 1 is verifying synthesis hole
Diameter imaging and indispensable optical device.In addition, fixed star-planet light source analogy device 1 in the present invention is other than it can be used for being
The simulation of planetary system light source can also be generalized in the detection of existing some optical instruments, the different graticle such as adapted,
Together with micro eyepiece head or microscopic system, focal length, resolution and the other image quality of lens or lens group can be measured, it will
Plane mirror is placed on the workpiece of linear motion, is observed by the Gauss eyepiece on parallel light tube, to examine the straight of workpiece
Linearly.
Controllable bore diameter array 2, the optical signal generated for receiving fixed star-planet light source analogy device 1, including multiple independent controls
The sub-aperture of system；Controllable bore diameter array 2 receives the control instruction of data processing module 5, and different sub-aperture combinations is successively allowed to be in
Working condition generates the geometry arrangement of different sub-aperture combinations, simulates the case of motion of Aerospace Satellite sub-aperture, carry out to movement
It is equivalent.
Controllable bore diameter array 2 uses liquid crystal array, and liquid crystal array includes multiple liquid crystal cells 21, and sub-aperture is liquid crystal cells
21, two electrodes of each liquid crystal cells 21 are powered or power off, each liquid crystal according to the received control instruction of controllable bore diameter array 2
The driving of two electric field between electrodes of unit 21 causes the field effect of twisted liquid crystal molecules nematic, to reach control lit transmissive
Or shielding function is passed through when two electrodes of liquid crystal cells 21 are not powered from fixed star-planet light source analogy device 1 optical signal
Controllable bore diameter array 2 forms complete light and penetrates approach；And once two electrodes of liquid crystal cells 21 power-up after, due to by
To the influence of external voltage, liquid crystal molecule no longer arranges in normal fashion, and such light can not just pass through, to realize
Control to incident optical signal on-off.
Liquid crystal cells 21 in liquid crystal array use hexagon or circle, as shown in Figure 3 a-3b；Hexagonal design be from
Reduce what waste area angle considered, circular design is that angle considers from the processing is simple, the effective area of controllable bore diameter array 2
Equal to the light harvesting area (remembering that its area is A) of focal imaging module 3, in order to effectively simulate sub-aperture movement, crystal oscillator array
In every hexagonal cells or the areas of round liquid crystal cells 21 should select suitable dimension, excessive 21 size of liquid crystal cells makes
Selectable aperture combination it is few, can not effectively influence of the clarifying space coverage property to synthetic aperture imaging, too small liquid
Brilliant 21 size of unit be only capable of covering sub-fraction space so that each liquid crystal cells 21 penetrate light it is fewer, leakage it is spuious
Light will affect, and be unfavorable for synthetic aperture imaging.To sum up, 21 area of liquid crystal cells selected in the present invention is the 1/ of light harvesting area A
1000 to 1/16.
Focal imaging module 3 for converging the optical signal of the output of controllable bore diameter array 2, and is sent to micro-imaging module
4；Focal imaging module 3 uses convex lens, and the mismachining tolerance of face type requires control within 1/10 wavelength, to meet common phase interference
The requirement of condition, the camera lens of optical interference imaging are all to need special polishing, are guaranteed by machining accuracy.
In order to avoid, because of the extra error that face type difference introduces, the present invention uses only one group of focal imaging in more mirror systems
Module, under conditions of guaranteeing its surface figure accuracy, systematic error is efficiently controlled, and is avoided in more mirror systems because of face type
The extra error that difference introduces stops surplus for the simulation of other environmental errors and interference imaging method validation.Systematic error is main
Being includes face type mismachining tolerance, movement introduces error and environmental factor introduces error (such as expanding with heat and contract with cold), using multiple groups separate type
If focal imaging module, since interference imaging needs optical path difference control in 1/10 wavelength magnitude, this requires multiple groups camera lens to have
The machining accuracy of consistency (is intended to control in 1/10 wavelength magnitude, and processing cost is high, usually hundreds of thousands or even up to a million
Differ), great challenge is brought to the difference control of multiple groups separate type focal imaging module, otherwise because of phase difference disunity,
It cannot achieve interference imaging.The present invention is by introducing " equivalent movement ", only with one group of focal imaging module, so that in optical frames
When head processing, only with the surface precision for guaranteeing single camera lens, the technical costs and economy of interference imaging are greatly reduced
Cost alleviates the pressure of optical compensation, can provide for environmental error simulation with the verifying of interference imaging algorithm enough remaining
Amount.
Micro-imaging module 4 for generating and amplifying interferometric fringe signal, and is sent to data processing module 5.
Data processing module 5 for recording each interference fringe, and controls controllable bore diameter array 2 and executes next second son
The through and off of aperture combination, are changed with simulated baseline, after the UV covering that baseline variation is imaged enough, data processing module
5, according to the interference fringe of record, carry out imaging resolving, reconstruct fixed star-planet light source image information.
In space combination aperture light interference imaging, it is desirable that in the case where given sub-aperture number, change sub-aperture
Geometry arrangement, the i.e. variation of sub-aperture relative position obtain better interference image to realize the covering of spatial frequency.In order to
Realize optimal covering, data processing module 5 uses FPGA+DSP combo architectures, and the geometry arrangement that different sub-apertures combine is deposited
Storage gets up to generate control instruction, control instruction is sent to controllable bore diameter array 2 according to certain time for exposure, to control correspondence
Sub-aperture combine through and off, the time for exposure according to the target source brightness of detection determine；The liquid crystal cells 21 of " logical " indicate to correspond to
Sub-aperture be work, on the contrary, the liquid crystal cells 21 of " disconnected " indicate that corresponding sub-aperture is idle.According to this, generation pair
The sub-aperture geometry arrangement answered, realizes that sub-aperture spatial movement is equivalent.According to instruction on-off, each on-off may correspond to difference
Liquid crystal cells 21.Data processing module 5 is handled using FPGA+DSP combo architectures as real time information.
Controllable bore diameter array 2, focal imaging module 3, micro-imaging module 4 are installed in vacuum optical dark room 6, vacuum
Optical dark room 6 is equipped with vacuum window 61, and the optical signal transmission for allowing fixed star-planet light source analogy device 1 to export concurrently is incident upon can
Array of apertures 2 is controlled, micro-imaging module 4 is connect by the second vacuum sealing joint 63 with data processing module 5, data processing mould
Block 5 is connect by the first vacuum sealing joint 62 with controllable bore diameter array 2.Vacuum optical dark room 6 is for shielding external environmental light
Influence；Fixed star-planet light source analogy device 1, vacuum optical dark room 6 and data processing module 5 is both placed on vibration-free tables 7, is subtracted
Vibration platform 7 is for providing unified space reference for whole system, to eliminate the error that different spaces benchmark is introduced to measurement.
Working principle: light source 11 generates ultraviolet light, visible or infrared light, integrated ball 12 by equably diffusing reflection,
Uniform light distribution is formed on spherical surface, diffusing reflection light is exported through the first light hole 13, the second light hole 14 respectively, through second
The light that light hole 14 exports, which is attenuated after device 15 is decayed, enters smallcolumn diaphragm 110, forms emergent ray, the first plane mirror 16, the
Two plane mirrors 18 are fixed at 17 inside lock of sleeve, for optical path of turning back, so that light is propagated along sleeve 17, hence into aperture
Light bar 110；Amici prism 111 turns back the light that smallcolumn diaphragm 110 and the first light hole 13 export to plane mirror 112, warp
It is parallel to export two beams for having certain angle, brightness different for two secondary reflections of plane mirror 112 and off axis paraboloidal mirror 113
Light；The parallel light emitting of two beams to controllable bore diameter array 2, controllable bore diameter array 2 receives the control instruction of data processing module 5, according to
It is secondary to make different sub-aperture combinations in running order, the geometry arrangement of different sub-aperture combinations is generated, Aerospace Satellite sub-aperture is simulated
The case of motion of diameter has carried out movement equivalent；Focal imaging module 3 converges the optical signal that controllable bore diameter array 2 exports, concurrently
It send to micro-imaging module 4；Micro-imaging module 4 generates and amplifies interferometric fringe signal, and is sent to data processing module 5；
5 recording interference fringe of data processing module, and the through and off that controllable bore diameter array 2 executes sub-aperture combination next time are controlled, with
Simulated baseline variation, after the UV covering that baseline variation is imaged enough, data processing module 5 is according to the interference item of record
Line carries out imaging resolving.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of optical synthesis aperture imaging test system for being outer planet detection, which is characterized in that including
Fixed star-planet light source analogy device (1), for exporting the two beam directional lights different with certain angle difference, brightness, simulation
It is the optical signal that outer fixed star and planet generate；
Controllable bore diameter array (2), the optical signal generated for receiving fixed star-planet light source analogy device (1), including multiple independent controls
The sub-aperture of system；
Focal imaging module (3) for converging the optical signal of controllable bore diameter array (2) output, and is sent to micro-imaging module
(4)；
Micro-imaging module (4) for generating and amplifying interferometric fringe signal, and is sent to data processing module (5)；
Data processing module (5) is used for recording interference fringe, and controls controllable bore diameter array (2) and execute sub-aperture group next time
The through and off of conjunction, are changed with simulated baseline, after the UV covering that baseline variation is imaged enough, according to the interference fringe of record
Imaging resolving is carried out, fixed star-planet light source image information is reconstructed.
2. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 1, special
Sign is that the data processing module (5) uses FPGA+DSP combo architectures, and the geometry for combining different sub-apertures arranges preparatory
Control instruction is stored and generated, control instruction is sent to controllable bore diameter array (2) according to certain time for exposure, with control pair
The sub-aperture combination through and off answered；Time for exposure determines according to the target source brightness of detection.
3. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 2, special
Sign is that the controllable bore diameter array (2) uses liquid crystal array, and liquid crystal array includes multiple liquid crystal cells (21), the sub-aperture
Diameter is liquid crystal cells (21), and two electrodes of each liquid crystal cells (21) are according to controllable bore diameter array (2) received control instruction
It is powered or powers off.
4. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 3, special
Sign is that the liquid crystal cells (21) in the liquid crystal array use hexagon or circle.
5. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 1, special
Sign is that the fixed star-planet light source analogy device (1) includes light source (11), and light source (11) is set to the centre of sphere of integrating sphere (12), product
The spherical surface of bulb separation (12) is equipped with orthogonal first light hole (13), the second light hole (14), the second light hole (14) and U
Sleeve (17) one end of type connects, and sleeve (17) other end is equipped with smallcolumn diaphragm (110), and attenuator is equipped in sleeve (17)
(15), it is successively arranged the first plane mirror (16), the second plane mirror (18) in bending place along optical path direction in sleeve (17), is divided rib
Mirror (111) turns back the light that smallcolumn diaphragm (110) and the first light hole (13) export to plane mirror (112), anti-through plane
Two secondary reflections of mirror (112) and off axis paraboloidal mirror (113) are penetrated, it is flat to export two beams for having certain angle difference, brightness different
Row light.
6. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 5, special
Sign is that the light that the light and smallcolumn diaphragm (110) that first light hole (13) is projected project enters Amici prism (111)
Differential seat angle less than 1 rad.
7. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 5, special
Sign is that the smallcolumn diaphragm (110) is fixedly connected by Stop-motion lock (19) with sleeve (17).
8. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 1, special
Sign is that the effective area of the controllable bore diameter array (2) is equal to the light harvesting area of focal imaging module (3), each sub-aperture
Area be light harvesting area 1/1000 to 1/16.
9. a kind of optical synthesis aperture imaging test system for being outer planet detection according to claim 1, special
Sign is that the focal imaging module (3) uses convex lens, and the mismachining tolerance of face type requires control within 1/10 wavelength.
10. -9 described in any item a kind of optical synthesis aperture imaging tests for being outer planet detection according to claim 1
System, which is characterized in that the controllable bore diameter array (2), focal imaging module (3), micro-imaging module (4) are installed in very
In space time optics darkroom (6), vacuum optical dark room (6) is equipped with vacuum window (61), allows fixed star-planet light source analogy device (1)
For the optical signal of output through being concurrently incident upon controllable bore diameter array (2), micro-imaging module (4) passes through the second vacuum sealing joint
(63) it is connect with data processing module (5), data processing module (5) passes through the first vacuum sealing joint (62) and controllable bore diameter battle array
Arrange (2) connection；Fixed star-planet light source analogy device (1), vacuum optical dark room (6) and data processing module (5) are both placed in vibration damping
On platform (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248547.6A CN109946712B (en) | 2019-03-29 | 2019-03-29 | Synthetic aperture optical imaging test system for extrasystematic planet detection |
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