CN104267406A - Diffuse reflection laser ranging and high resolution imaging synchronous measurement photoelectric telescope system - Google Patents
Diffuse reflection laser ranging and high resolution imaging synchronous measurement photoelectric telescope system Download PDFInfo
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- CN104267406A CN104267406A CN201410444807.4A CN201410444807A CN104267406A CN 104267406 A CN104267406 A CN 104267406A CN 201410444807 A CN201410444807 A CN 201410444807A CN 104267406 A CN104267406 A CN 104267406A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
- G02B27/0068—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration having means for controlling the degree of correction, e.g. using phase modulators, movable elements
Abstract
The invention relates to a diffuse reflection laser ranging and high-resolution imaging synchronous measurement photoelectric telescope system capable of being used for space debris and belongs to the technical field of photoelectric telescopes. The system comprises a laser emitting part, an echo receiving part and a self-adaptive optical imaging part. According to the laser emitting part, laser light emitted by a laser enters a telescope through a laser emitting light path to be emitted to a space target. According to the echo receiving part, an echo light beam is received by the telescope and then enters an echo receiving and detecting light path, echo signals are generated and then transmitted to a laser ranging control circuit, and a laser ranging distance value is obtained after software processing. According to the self-adaptive optical imaging part, the space target light is received by the telescope, enters a self-adaptive optical system and is shrunk by a beam shrinking light path, a Hartmann sensor and a wavefront detector are used for detecting overall wavefront inclination and wavefront errors to obtain the overall wavefront inclination degree and wavefront error data which are used for controlling a fine tracking system to correct the wavefront inclination and controlling a deformable mirror to correct the wavefront errors, and therefore a high-resolution image is obtained.
Description
Technical field
The invention belongs to photo-electric telescope technical field, relate to a kind of photo-electric telescope system and photo-electric telescope, particularly can simultaneously for space junk diffuse reflection laser ranging and high resolution imaging synchro measure.
Background technology
Satellite laser ranging (SLR) (Satellite Laser Ranging, SLR) to be early 1960s initiated by NASA (NASA) a technological means being intended to utilize space technology research geodynamics, geodesy, geophysics and uranology etc.It utilizes to measure the turnaround time of laser pulse between research station and satellite, thus calculate the distance of satellite to survey station, is a kind of technological means that in current extraterrestrial target range observation, precision is the highest.Laser ranging because laser is monochromaticity, and there is good directivity, so can provide orientation, the height and distance information of target simultaneously.Conventional laser range finding refers to cooperative target---the extraterrestrial target of corner reflector is housed, as Ajisai, Lageos-1 satellite etc., carries out satellite laser ranging (SLR), can grade be reached to the distance accuracy of Lageos satellite at present.
Space junk belongs to noncooperative target, does not have established angle reverberator, and diffuse reflection laser ranging technique can only be utilized to detect space junk.Due to space junk and the importance of the precise orbit determination of some non-cooperation satellite, abroad attach great importance to the research of space junk and the range finding of non-collaborative space target laser, but only have a small amount of report, majority is in confidential state.US military once carried out this respect research on the Starfire bore 3.5 m telescope of New Mexico.The electron-optical system company (EOS) of Australia have developed the active space junk laser observations system for routine, this system can observe 1000km orbit altitude be less than the space junk of 10cm exactly, measuring accuracy is better than 1 m, BURN-THROUGH RANGE is 3200 km, (24 h) for orbit determination accuracy 5 m, orbit prediction precision 200m.Domestic, Shanghai Observatory is cooperated with 11th Research Institute of China Electronics Technology Group Corporation, macro-energy high-power Nd:YAG range finding pilot system is established in Type At The Sheshan Station, Shanghai City research station, the laser starting noncooperative target satellite and space junk is followed the tracks of and range finding test, the diffuse reflection laser ranging data of 3 rocket remains is obtained, distance accuracy 70cm ~ 80cm in July, 2008.2010 Shanghai Observatorys are diffuse reflection precision of laser ranging 50cm ~ 80cm after system upgrade transformation, and maximum ranging distance can reach 1200km.In addition, Yunnan Observatory actively develops space junk diffuse reflection laser ranging research from January, 2008, Design and implementation Yunnan Observatory 1.2 m telescope 10Hz is light path diffuse reflection laser ranging control system altogether, comprise laser instrument, signal sensor and survey time equipment etc. control, and the echo of rocket remains is received on June 7th, 2010, obtained number multi-turn space junk echo up till now, range error scope is 50 ~ 250cm.
Adaptive optics (Adaptive Optics, AO) technology compensates atmospheric turbulence at present to affect most effective measures to telescope.ADAPTIVE OPTICS SYSTEMS utilizes wave front detector real-time detection Beam Wave-Front error, then these measurement data carried out processing and be converted to the control signal of ADAPTIVE OPTICS SYSTEMS, controlling distortion mirror works, real time correction Beam Wave-Front error, thus compensate the wavefront distortion that caused by atmospheric turbulence, make the target picture that telescope obtains close to diffraction limit.Self-adaptive optical telescope obtains application in target high resolution imaging.In the SPIE published for 2004, the 943rd page describes Yunnan Observatory 1.2m self-adaptive optical telescope and can be used for target high resolution imaging, but this self-adaptive optical telescope is only for high resolution imaging, diffuse reflection (being satellite originally) laser ranging can not be used for.
The task of Space Object Detection system carries out accurately detecting and tracking to important extraterrestrial target, and determining may to important goal characteristics such as the task of the target that aerospace system constitutes a threat to, size, shape and orbit parameters; Target characteristic data is sorted out and distributes.Space Object Detection has important military value, not only can help the spacial ability determining potential enemy, can also predict the track of extraterrestrial target, to contingent collision and the attack alarm etc. to one's own side's space system.The analysis of target property is the precondition of target detection, identification, and darker to target understanding, the information obtaining target is more, more can improve the ability to its detection, identification.
Summary of the invention
The technical matters that the present invention solves overcomes the deficiencies in the prior art, integrated innovation prior art, provide a kind of can simultaneously for the photo-electric telescope system of diffuse reflection laser ranging and high resolution imaging.
The technical solution used in the present invention is as follows:
A photo-electric telescope system for diffuse reflection laser ranging and high resolution imaging synchro measure, comprises Laser emission, echo reception and adaptive optical imaging, specific as follows:
Laser emission: laser ranging control circuit and software send laser firing signals, the laser in Kuder room enters telescope by Laser emission light path, is then launched to extraterrestrial target by telescope;
Echo reception: the echo beam from extraterrestrial target is received by telescope, enter echo reception and the sounding light path of Kuder room again, produce echoed signal and send laser ranging control circuit and software to, obtain the distance value of diffuse reflection laser ranging after treatment;
Adaptive optical imaging: extraterrestrial target light is received by telescope, enter the ADAPTIVE OPTICS SYSTEMS in Kuder room, by contracting beam optical path contracting bundle, wavefront overall tilt and wavefront error is detected again by Hartmann sensor and Wavefront processor, and provide wavefront overall tilt amount and wavefront error data after process, be used for controlling smart tracker correction wavetilt and controlling distortion mirror correction wavefront error, thus obtain high-definition picture.
The present invention also provides the photo-electric telescope of a kind of diffuse reflection laser ranging and high resolution imaging synchro measure, comprises telescopic system, diffuse reflection laser distance measuring system and ADAPTIVE OPTICS SYSTEMS; Described telescopic system comprises primary mirror, secondary mirror, folding axial light path, lens barrel, altitude azimuth form frame, torque motor, tracking servo control system, primary mirror and secondary mirror are arranged in lens barrel, lens barrel and folding axial light path are arranged in altitude azimuth form frame, two torque motors are arranged on altitude azimuth form bracket height axle and azimuth axis respectively, and tracking servo control system follows the tracks of space junk by driving moment Electric Machine Control telescope.
Described diffuse reflection laser distance measuring system comprises Laser emission light path, echo reception and sounding light path and laser ranging control circuit and software;
Laser emission light path comprises laser instrument, negative lens and positive lens, and the laser that laser instrument sends is launched to space junk by telescope after negative lens and positive lens;
Echo reception comprises tilting mirror, pair of alignment lens, aperture, mechanical shutter, narrow band pass filter and detector with detection light path; Tilting mirror between receiving light path and laser instrument for transmitting and receiving light path converting: when Laser emission connect laser optical path, telescope light path is in emission state; Connect receiving light path during echo reception, telescope is in accepting state; Two sides collimation lens is confocal, they echo beam is transformed into diameter and detector Receiver aperture match without defocused laser beam; Aperture is positioned at collimation lens focus place, the noise photon that filtering is different from echo light direction; Mechanical shutter is 10mm place before collimation lens focus, for controlling optical circuit and shut-in time, and the noise photon in filtering certain hour section; Narrow band pass filter is positioned at after collimation lens, for the noise photon that filtering is different from echo optical wavelength; Detector is positioned at optical line terminal, receives echo photon and produces echoed signal;
The processes such as laser ranging control circuit and software control Laser emission, echo reception and data processing.
Described ADAPTIVE OPTICS SYSTEMS comprises smart tracker, contracting beam optical path, distorting lens, Hartmann sensor and wave front processor;
Essence tracker has two-stage, and first order essence tracker is positioned at after the second spectroscope, detects and revises telescope tracking error; Second level essence follows the tracks of the wavefront overall tilt error then caused by Hartmann sensor atmospheric sounding turbulent flow, and the second tilting mirror carries out real-Time Compensation according to the wavetilt amount measured;
Contracting beam optical path is positioned at after second spectroscopical reflected light path, is made up of a pair off axis paraboloidal mirror, will narrow down to the size matched with distorting lens from telescopical light beam;
After distorting lens is positioned at contracting beam optical path, be then the 3rd spectroscope and imaging CCD successively below, optical line terminal is Hartmann sensor; Hartmann sensor is the detection simultaneously carrying out carrying out light beam wavefront error and second level essence tracking error; Wave front processor is as the electronic equipment of non-optical device, be responsible for processing the data that Hartmann sensor sends, the wavefront ensemble average slope data obtained is used for controlling second level tilting mirror and carries out second level essence tracing control, wavefront error data are then used for the work of controlling distortion mirror, compensated wave front-distortion, finally provides high resolution image by the second imaging lens and imaging CCD.
Simultaneously for the photo-electric telescope system of diffuse reflection laser ranging and high resolution imaging, telescopic system, diffuse reflection laser distance measuring system and ADAPTIVE OPTICS SYSTEMS can be comprised.Photo-electric telescope systems radiate laser is to target, next light is reflected after the telescopic system that primary mirror, secondary mirror and folding axle catoptron form from target, enter Kuder room, two-way is divided at Kuder room light beam, wherein a road is that the echo light that target reflects laser is returned enters echo reception system, produces laser ranging echoed signal after multiple optical filtering; The sunshine part of target reflection then enters ADAPTIVE OPTICS SYSTEMS, after the wavefront distortion that tilting mirror, distorting lens correction atmospheric turbulence produce, obtains the high resolution target image close to optical diffraction limit through imaging system.
Principle of the present invention:
1, diffuse reflection laser distance measuring principle:
The principle of diffuse reflection laser ranging is to diffuse reflecting target emission pulse laser, and record the Laser emission moment, again with the echo photon that telescope receiving target reflects, and record receives the moment of echo photon, the distance of target to surface-based observing station just can be obtained by the mistiming calculating Laser emission moment and echo reception moment.
Diffuse reflection laser ranging adopts transmitting-receiving light path mode altogether, and wherein tilting mirror is the key device of transmitting-receiving light path converting, and tilting mirror has light hole, and remainder is coated with high-reflecting film, and during diffuse reflection laser ranging, tilting mirror rotates with certain speed.During Laser emission, the accessible perforate through tilting mirror of laser beam, is expanded through negative lens, positive lens, then through the first spectroscope by telescope to objective emission.Echo then arrives Kuder room after primary mirror, secondary mirror, the reflection of folding axle catoptron, tilting mirror is arrived again through the first spectroscope, positive lens, negative lens, now the reflecting surface of tilting mirror has proceeded in light path, echo beam is reflected to collimation lens set, then receives generation echoed signal through being detected device after narrow band pass filter.Wherein collimation lens set echo beam is transformed into diameter and detector Receiver aperture match without defocused laser beam; The noise photon that narrow band pass filter filtering is different from echo photon wavelength.Arrange aperture and mechanical shutter at collimation lens focus place in addition, the effect of aperture is the filtering noise photon different from echo direction, and mechanical shutter then controls optical circuit and shut-in time, the noise photon that filtering is different from echo time of arrival.
2, ADAPTIVE OPTICS SYSTEMS principle of work:
Sky target beam becomes without defocused laser beam after primary mirror, secondary mirror reflection, then reflects into into Kuder room, on the platform of adaptive optical imaging system in Kuder room through multiaspect folding axle catoptron and the first tilting mirror.In order to improve the tracking accuracy to target, be provided with two-stage essence tracker, the wavefront overall tilt error caused with the tracking error and atmospheric turbulence that compensate altitude azimuth form frame.The tilting mirror of first order essence tracker is 45 ° of catoptrons at pitching spindle nose, and carry out light splitting at spectroscope place, Kuder room adaptive inertia weight front end second, part light transmission second spectroscope enters smart tracking transducer, carries out tracking error detection by intensified charge coupled device ICCD detector.Tracking error (star image hot spot displacement of center of gravity) calculates and control algolithm calculating is completed by high speed digital signal processor, and its output controls the first tilting mirror and carries out tracking error correction after high-voltage amplifier amplifies.Before second level essence is followed the tracks of and is then arranged on distorting lens, the wavefront ensemble average slope data that Hartmann sensor below obtains controls the second tilting mirror and carries out second level essence tracing control, corrects wavetilt further, reduces star image shake.ADAPTIVE OPTICS SYSTEMS is made up of contracting beam optical path, distorting lens, Hartmann sensor and wave front processor.Beam size is transformed into the size matched with distorting lens by contracting Shu Guang.The wavefront error of ADAPTIVE OPTICS SYSTEMS and the detection of second level essence tracking error are carried out in Hartmann sensor effect, be made up of, adopt high-quantum efficiency, low noise, high frame rate charge-coupled image sensor as detector multiple hexagonal sub-aperture.The light signal that Hartmann detects calculates and the process such as control through Hartmann's hot spot center calculation, wave front restoration, and the wavefront ensemble average slope data obtained is used for controlling second level tilting mirror work; The wavefront error data that Hartmann sensor obtains then are used for controlling distortion mirror, compensate the wavefront distortion because atmospheric turbulence produces.Image after wavefront correction is focused on by the second imaging lens, imaging CCD detection, obtains the target image of high resolution.
compared with prior art, its beneficial effect is in the present invention:
(1) native system diffuse reflecting target precision of laser ranging is better than optical observation precision;
(2) native system adaptive optics is to the optical diffraction limit of target imaging resolution close to telescope bore, far above the imaging resolution of same bore (being greater than 100mm) non-self-adapting optical telescope;
(3) laser ranging and high-resolution imaging can be carried out to the extraterrestrial target with corner reflector simultaneously;
(4) diffuse reflection laser ranging and high-resolution imaging can be carried out to space junk simultaneously.
Accompanying drawing explanation
Fig. 1 is imaging system and diffuse reflection laser distance measuring system Principles and methods figure schematic diagram in the present invention;
Fig. 2 is imaging system and diffuse reflection laser ranging optical system schematic diagram in the present invention;
In Fig. 2: 1-primary mirror, 2-secondary mirror, 3-first folding axle catoptron, 4-first tilting mirror, 5-second folding axle catoptron, 6-the 3rd folding axle catoptron, 7-four fold axle catoptron, 8-first spectroscope, 9-positive lens, 10-negative lens, 11-tilting mirror, 12-laser instrument, 13-first collimation lens, 14-aperture, 15-mechanical shutter, 16-second collimation lens, 17-narrow band pass filter, 18-detector, 19-second spectroscope, 20-first imaging lens, 21-ICCD detector, 22-first off axis paraboloidal mirror, 23-field lens, 24-second off axis paraboloidal mirror, 25-second tilting mirror, 26-distorting lens, 27-the 3rd spectroscope, 28-second imaging lens, 29-imaging CCD, 30-total reflective mirror, 31-Hartmann sensor,
Fig. 3 is the structural representation of telescopic system in the present invention;
32-lens barrel, 33-altitude axis torque motor, 34-azimuth axis torque motor, 35-altitude azimuth form frame, 36-tracking servo control system.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, the photo-electric telescope system of a kind of diffuse reflection laser ranging and high resolution imaging synchro measure, comprises Laser emission, echo reception and adaptive optical imaging, specific as follows:
Laser emission: laser ranging control circuit and software send laser firing signals, the laser in Kuder room enters telescope by Laser emission light path, is then launched to extraterrestrial target by telescope;
Echo reception: the echo beam from extraterrestrial target is received by telescope, enter echo reception and the sounding light path of Kuder room again, produce echoed signal and send laser ranging control circuit and software to, obtain the distance value of diffuse reflection laser ranging after treatment;
Adaptive optical imaging: extraterrestrial target light is received by telescope, enter the ADAPTIVE OPTICS SYSTEMS in Kuder room, by contracting beam optical path contracting bundle, wavefront overall tilt and wavefront error is detected again by Hartmann sensor and Wavefront processor, and provide wavefront overall tilt amount and wavefront error data after process, be used for controlling smart tracker correction wavetilt and controlling distortion mirror correction wavefront error, thus obtain high-definition picture.
As shown in Figures 2 and 3, the photo-electric telescope of a kind of diffuse reflection laser ranging and high resolution imaging synchro measure, comprises telescopic system, diffuse reflection laser distance measuring system and ADAPTIVE OPTICS SYSTEMS; Described telescopic system comprises primary mirror 1, secondary mirror 2, folding axial light path, lens barrel 32, altitude azimuth form frame 35, torque motor---altitude axis torque motor 33 and azimuth axis torque motor 34, tracking servo control system 36, primary mirror 1 and secondary mirror 2 are arranged in lens barrel 32, lens barrel 32 and folding axial light path are arranged in altitude azimuth form frame 35, two torque motors are arranged on altitude azimuth form bracket height axle and azimuth axis respectively, and tracking servo control system 36 follows the tracks of space junk by driving moment Electric Machine Control telescope.
Described folding axial light path comprises first folding axle catoptron 3, first inclination the 4, second folding axle catoptron the 5, the 3rd folding axle catoptron 6 and four fold axle catoptron 7, light beam from extraterrestrial target becomes without defocused laser beam through primary mirror 1, secondary mirror 2 after receiving, arrival first tilting mirror 4 is reflected through the first folding axle catoptron 3, first tilting mirror 4 revises telescope tracking error back reflection to the second folding axle catoptron 5, then the first spectroscope 8 in the 3rd folding axle catoptron 6, four fold axle catoptron 7 reflection arrival Kuder room.First spectroscope 8 is optical mirror slips that diffuse reflection laser distance measuring system and ADAPTIVE OPTICS SYSTEMS share, effect enters adaptive optics light path by from the reflection of extraterrestrial target natural light, and the light beam of optical maser wavelength is then through this eyeglass: laser beam transparent first spectroscope 8 enters telescope and enters echo reception light path to extraterrestrial target transmitting, laser ranging echo beam through the first spectroscope 8.
First folding axle catoptron 3, first tilting mirror 4, second folding axle catoptron the 5, the 3rd folding axle catoptron 6, four fold axle catoptron 7 are positioned at altitude azimuth form frame folding axle point successively, be used for during reception guiding light beam to enter Kuder room, be used for guiding laser beam to enter major-minor mirror during Laser emission and launch to extraterrestrial target.
Described diffuse reflection laser distance measuring system comprises Laser emission light path, echo reception and sounding light path and laser ranging control circuit and software;
Laser emission light path comprises laser instrument 12, negative lens 10 and positive lens 9, and the laser that laser instrument 12 sends is launched to space junk by telescope after negative lens 10 and positive lens 9;
Echo reception comprises tilting mirror 11, pair of alignment lens 13 and 16, aperture 14, mechanical shutter 15, narrow band pass filter 17 and detector 18 with detection light path; Tilting mirror 11 between receiving light path and laser instrument 12 for transmitting and receiving light path converting: connect laser optical path when Laser emission, telescope light path is in emission state; Connect receiving light path during echo reception, telescope is in accepting state; Two sides collimation lens 13 and 16 is confocal, they echo beam is transformed into diameter and detector 18 Receiver aperture match without defocused laser beam; Aperture 14 is positioned at collimation lens focus place, the noise photon that filtering is different from echo light direction; Mechanical shutter 15 is 10mm place before collimation lens focus, for controlling optical circuit and shut-in time, and the noise photon in filtering certain hour section; Narrow band pass filter 17 is positioned at after collimation lens 16, for the noise photon that filtering is different from echo optical wavelength; Detector 18 is positioned at optical line terminal, receives echo photon and produces echoed signal;
Laser ranging control circuit and software are not non-optical devices in the optical path, and effect controls Laser emission, echo reception and data handling procedure.
Described tilting mirror 11 is coated with high-reflecting film, and has light hole, and light hole is positioned at distance 80mm place, tilting mirror center.Described ADAPTIVE OPTICS SYSTEMS comprises smart tracker, contracting beam optical path, distorting lens, Hartmann sensor 31 and wave front processor;
Essence tracker has two-stage, and first order essence tracker is positioned at after the second spectroscope 19, detects and revises telescope tracking error;
First tilting mirror 4 of first order essence tracker is 45 ° of catoptrons at pitching spindle nose, and carry out light splitting at spectroscope place, Kuder room adaptive inertia weight front end second 19, part light transmission second spectroscope 19 enters smart tracking transducer, carries out tracking error detection by intensified charge coupled device ICCD detector 21.
After first imaging lens 20 and ICCD21 are positioned at the second spectroscope 19 projecting light path successively, be mainly used to monitoring telescope tracking error.
Second level essence follows the tracks of the wavefront overall tilt error caused by Hartmann sensor 31 atmospheric sounding turbulent flow, and the second tilting mirror 25 carries out real-Time Compensation according to the wavetilt amount measured;
Contracting beam optical path is positioned at after the reflected light path of the second spectroscope 19, is made up of, will narrows down to the size matched with distorting lens 26 from telescopical light beam a pair off axis paraboloidal mirror 22 and 24 and the field lens 23 that is positioned at focus;
After 3rd spectroscope 27 is positioned at distorting lens 26, before the second imaging lens 28;
After second imaging lens 28 is positioned at 27 the 3rd spectroscope projecting light paths successively with imaging CCD29;
After total reflective mirror 30 is positioned at the 3rd spectroscope 27 reflected light path;
After distorting lens 26 is positioned at contracting beam optical path, be then the 3rd spectroscope 27, second imaging lens 28 and imaging CCD29 successively below, optical line terminal is Hartmann sensor 31, Hartmann sensor 31 is the detections simultaneously carrying out carrying out light beam wavefront error and second level essence tracking error, wave front processor is as the electronic equipment of non-optical device, be responsible for processing the data that Hartmann sensor 31 sends, the wavefront ensemble average slope data obtained is used for controlling second level tilting mirror 25 and carries out second level essence tracing control, wavefront error data are then used for controlling distortion mirror 26 and work, compensated wave front-distortion, image after wavefront correction is focused on by the second imaging lens 28, finally provide high resolution image by the second imaging lens 28 with imaging CCD 29.
Second tilting mirror 25, distorting lens 26, the 3rd spectroscope 27, second imaging lens 28, imaging CCD29, the phase mutual edge distance between total reflective mirror 30 and Hartmann sensor 31 and position without specific requirement, space allow condition under, as long as light path can separate.
The present invention simultaneously for the photo-electric telescope system of diffuse reflection laser ranging and high resolution imaging, can comprise telescopic system, diffuse reflection laser distance measuring system and ADAPTIVE OPTICS SYSTEMS.Photo-electric telescope systems radiate laser is to target, next light is reflected after the telescopic system that primary mirror, secondary mirror and folding axle catoptron form from target, enter Kuder room, two-way is divided at Kuder room light beam, wherein a road is that the echo light that target reflects laser is returned enters echo reception system, produces laser ranging echoed signal after multiple optical filtering; The sunshine part of target reflection then enters ADAPTIVE OPTICS SYSTEMS, after the wavefront distortion that tilting mirror, distorting lens correction atmospheric turbulence produce, obtains the high resolution target image close to optical diffraction limit through imaging system.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof
.
Claims (5)
1. a photo-electric telescope system for diffuse reflection laser ranging and high resolution imaging synchro measure, is characterized in that comprising Laser emission, echo reception and adaptive optical imaging, specific as follows:
Laser emission: laser ranging control circuit and software send laser firing signals, the laser in Kuder room enters telescope by Laser emission light path, is then launched to space junk by telescope;
Echo reception: the echo beam from space junk is received by telescope, enter echo reception and the sounding light path of Kuder room again, produce echoed signal and send laser ranging control circuit and software to, obtain the distance value of diffuse reflection laser ranging after treatment;
Adaptive optical imaging: space junk light is received by telescope, enter the ADAPTIVE OPTICS SYSTEMS in Kuder room, by contracting beam optical path contracting bundle, wavefront overall tilt and wavefront error is detected again by Hartmann sensor and Wavefront processor, and provide wavefront overall tilt amount and wavefront error data after process, be used for controlling smart tracker correction wavetilt and controlling distortion mirror correction wavefront error, thus obtain high-definition picture.
2. the photo-electric telescope of diffuse reflection laser ranging according to claim 1 and high resolution imaging synchro measure, is characterized in that comprising telescopic system, diffuse reflection laser distance measuring system and ADAPTIVE OPTICS SYSTEMS; Described telescopic system comprises primary mirror, secondary mirror, folding axial light path, lens barrel, altitude azimuth form frame, torque motor and tracking servo control system, primary mirror and secondary mirror are arranged in lens barrel, lens barrel and folding axial light path are arranged in altitude azimuth form frame, two torque motors are arranged on altitude azimuth form bracket height axle and azimuth axis respectively, and tracking servo control system follows the tracks of space junk by driving moment Electric Machine Control telescope.
3. the photo-electric telescope of diffuse reflection laser ranging according to claim 2 and high resolution imaging synchro measure, is characterized in that described diffuse reflection laser distance measuring system comprises Laser emission light path, echo reception and sounding light path and laser ranging control circuit and software;
Laser emission light path comprises laser instrument, negative lens and positive lens, and the laser that laser instrument sends is launched to space junk by telescope after negative lens and positive lens;
Echo reception comprises tilting mirror, pair of alignment lens, aperture, mechanical shutter, narrow band pass filter and detector with detection light path; Tilting mirror is between receiving light path and laser instrument, and for transmitting and receiving light path converting: the connection laser optical path when Laser emission, telescope light path is in emission state; Connect receiving light path during echo reception, telescope is in accepting state; Two sides collimation lens is confocal, they echo beam is transformed into diameter and detector Receiver aperture match without defocused laser beam; Aperture is positioned at collimation lens focus place, the noise photon that filtering is different from echo light direction; Mechanical shutter is 10mm place before collimation lens focus, for controlling optical circuit and shut-in time, and the noise photon in filtering certain hour section; Narrow band pass filter is positioned at after collimation lens, for the noise photon that filtering is different from echo optical wavelength; Detector is positioned at optical line terminal, receives echo photon and produces echoed signal;
Laser ranging control circuit and software control Laser emission, echo reception and data handling procedure.
4. the photo-electric telescope of diffuse reflection laser ranging according to claim 3 and high resolution imaging synchro measure, is characterized in that described tilting mirror is coated with high-reflecting film, and has light hole, and light hole is positioned at distance 80mm place, tilting mirror center.
5. the diffuse reflection laser ranging according to Claims 2 or 3 or 4 and the photo-electric telescope of high resolution imaging synchro measure, is characterized in that described ADAPTIVE OPTICS SYSTEMS comprises smart tracker, contracting beam optical path, distorting lens, Hartmann sensor and wave front processor;
Essence tracker has two-stage, and first order essence tracker is positioned at after the second spectroscope, detects and revises telescope tracking error; Second level essence follows the tracks of the wavefront overall tilt error then caused by Hartmann sensor atmospheric sounding turbulent flow, and the second tilting mirror carries out real-Time Compensation according to the wavetilt amount measured;
Contracting beam optical path is positioned at after second spectroscopical reflected light path, is made up of, will narrows down to the size matched with distorting lens from telescopical light beam a pair confocal off axis paraboloidal mirror and the field lens that is positioned at focus;
After distorting lens is positioned at contracting beam optical path, be then the 3rd spectroscope and imaging CCD successively below, optical line terminal is Hartmann sensor; Hartmann sensor is the detection simultaneously carrying out carrying out light beam wavefront error and second level essence tracking error; Wave front processor is as the electronic equipment of non-optical device, be responsible for processing the data that Hartmann sensor sends, the wavefront ensemble average slope data obtained is used for controlling second level tilting mirror and carries out second level essence tracing control, wavefront error data are then used for the work of controlling distortion mirror, compensated wave front-distortion, finally provides high resolution image by the second imaging lens and imaging CCD.
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105182321A (en) * | 2015-08-24 | 2015-12-23 | 胡林亭 | Method for improving measurement distance of multi-pulse laser spots in external field |
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