CN108519591A - A kind of laser ranging light beam is directed toward the device of real-time high-precision monitoring - Google Patents
A kind of laser ranging light beam is directed toward the device of real-time high-precision monitoring Download PDFInfo
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- CN108519591A CN108519591A CN201810302063.0A CN201810302063A CN108519591A CN 108519591 A CN108519591 A CN 108519591A CN 201810302063 A CN201810302063 A CN 201810302063A CN 108519591 A CN108519591 A CN 108519591A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 11
- 241000931526 Acer campestre Species 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
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Classifications
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Telescopes (AREA)
Abstract
The present invention relates to the devices that a kind of laser ranging light beam is directed toward real-time high-precision monitoring, including：45 ° of speculums, transmitter-telescope, right-angle array speculum, receiving telescope, spectroscope monitor CCD, acousto-optic modulator, controllable aperture, collimating mirror, detector.Emit laser and emitted by transmitter-telescope and exported, the right-angle array speculum in most of light path through transmitting is partly reflected through right-angle array speculum, and light path is parallel is transferred into receiving telescope to spectroscope on the contrary with transmitting.Fraction is monitored CCD detection through spectroscope, other are reflected.When acousto-optic modulator works, the reflected beams deflect on the edge of controllable aperture, avoid damage of the light to detector；And when acousto-optic modulator does not work, return laser beam can be allowed to penetrate controllable aperture, collimating mirror, until detector.Real-time aiming in laser ranging to detecting target is conducive to the real-time monitoring that light beam is directed toward, promotes the development of laser ranging especially satellite laser ranging (SLR).
Description
Technical field
The present invention relates to laser ranging fields, and the dress monitored in real time is directed toward in particular to a kind of laser ranging light beam
It sets.
Background technology
Laser ranging has the good characteristics such as precision is high, and ranging distance is remote, in the position of the extraterrestrial targets such as satellite, space junk
It sets in measurement and is widely used.Artificial satellite is widely applied to communication, science exploration and experiment, military defence, meteorology
The BEI-DOU position system in equal fields, global position system GPS and China is answered in the social activities of people, life extensively
With far-reaching changes people’s lives mode, promotes the development of the mankind.Meanwhile the mankind are during exploring space, it is more next
More artificial satellite, deep space probe emit to space.In high radiation, vacuum, weightless severe space environment, these
The aircraft of mankind's manufacture, often the offset with position, damage equivalent risk, thus gradually lose its function.Laser satellite is surveyed
Away from the advantages that remote by its ranging, range accuracy is high, a kind of conventional means of Satellite Orbit Determination and monitoring are become, by each state
The attention of family.
Satellite distance is remote, speed is fast, and laser beam is needed accurately can to aim at and hit in satellite laser range-measurement system
The laser reflector of satellite is realized transmitting laser reflection going back to ground, then received by the receiving telescope of laser ranging system, quilt
The detecting terminal of range-measurement system --- single-photon detector detects, and exports echo-signal, realizes laser ranging.Yang Fumin, Dong Yun
Ice, Chen Wanzhen, Zhu Youmin, Tan Detong, Cai Shifu, Lu Wenhu are interim in Shanghai Observatory, CAS's annual 1985 the 7th
Article《Second generation satellite laser ranger rolls over the design and debugging of axis emission system》It proposes and swashs He-Ne feux rouges and transmitting
Light overlaps, and by transmitter-telescope, keeps He-Ne feux rouges parallel using combination kaleidoscope prism and is hoped with transmitting laser reflection to receiving
Remote mirror realizes detection, to realize through He-Ne feux rouges come the real-time monitoring to emitting laser.However, mentioning two-way in article
It is difficult to be adjusted within ± 15 rads that the light beam coincidence of different colours, which has certain difficulty, the depth of parallelism,；It is follow-up to use transmitting laser
Monitoring is adjusted under small energy, avoids the damage of spike filter and photomultiplier in eyes and reception system, due to
The direction of low power laser beam and the direction of high power laser light are there are certain deviation, and transmitting laser still has ± 10 jiaos under total power
The deviation of second.Practical star of surveying is in the process that total power exports there is still a need for transmitting laser, can be right in this way in total power Laser emission
The damage of reception system impacts, and increases the real-time high-precision monitoring difficulty of laser beam when realizing total power Laser emission.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of laser ranging light beams to be directed toward real-time high-precision monitoring
Device, using right angle combinations of reflections mirror, acousto-optic modulator, the devices such as controllable aperture, laser beam is during monitoring
By being deflected under the action of acousto-optic modulator, by the edge barrier of controllable aperture, prevent it from penetrating controllable aperture, until
On detector, the damage of detector in reception system is avoided, meets real-time monitoring when laser full power transmissions.Due to light
Transmission, satellite reflection return return laser beam with monitoring laser advanced at a distance from difference, there is the regular hour to prolong between the two
When, in this way by loading corresponding time delayed signal on acousto-optic modulator so that after return laser beam to reception system, acousto-optic modulation
Device does not work, and through controllable aperture, collimating mirror to detector realizes that the reception to return laser beam detects.
The present invention provides the devices that a kind of laser ranging light beam of offer is directed toward real-time high-precision monitoring, including：
45 ° of speculums, transmitter-telescope, right angle combinations of reflections mirror, receiving telescope, spectroscope monitor CCD, acousto-optic modulation
Device, controllable aperture, collimating mirror, detector.Emit laser to hope by the transmitting successively by 45 ° of speculums
Remote mirror and the right angle combinations of reflections mirror, right-angle array mirror described in most laser lights, fraction of laser light is through described straight
Corner reflection combined lens are with transmitting laser beam reflected in parallel through the receiving telescope to the spectroscope；Fraction light penetrates institute
It states spectroscope and flash ranging is received by the monitoring CCD, most of light penetrates the acousto-optic modulator through the spectroscope；It is described at this time
Acousto-optic modulator works, and beam emissions are deflected on the edge of the controllable aperture and are blocked, and cannot penetrate described controllable
Aperture light path, the collimating mirror to the detector.It is also deflected to by the light of transmitting laser back scattering in an atmosphere simultaneously
The controllable aperture edge.And the monitoring CCD monitoring transmitting laser intensity is more than the intensity of back scattering.And when transmitting
When the return laser beam of laser to satellite is returned, the acousto-optic modulator does not work, and return laser beam penetrates the controllable aperture light path,
The collimating mirror realizes the detection to laser satellite echo to the detector.
As further improvement of the invention, 45 ° of total reflective mirrors have the high-reflecting film consistent with transmitting laser, incident light
Angle with transmitting light is 90 °.
As further improvement of the invention, the transmitter-telescope is by concavees lens, and convex lens group is at telescope times magnification
Number is the obtained quotient of curvature of the curvature divided by the concavees lens of the convex lens；And can by adjust the concavees lens with it is convex
Lens distance realizes that the angle of divergence of transmitting laser is adjusted.
As further improvement of the invention, the right angle combinations of reflections mirror is all-trans by the one 45 ° of total reflective mirror, the 2nd 45 °
Mirror and installation workpiece composition, the one 45 ° of total reflective mirror are mutually perpendicular to the 2nd 45 ° of total reflective mirror, installation to the peace
Workpiece is filled, is firmly fixed on telescope.The one 45 ° of total reflective mirror is coated with the reflectance coating consistent with transmitting optical maser wavelength,
The reflection power of reflectance coating is about ~ 20mW, and reflectivity is reflection power divided by transmitting laser power.The 2nd 45 ° of total reflective mirror
It is coated with the highly reflecting films consistent with transmitting optical maser wavelength.The right angle combinations of reflections mirror（3）The transmitting laser of reflection swashs with transmitting
Light is substantially parallel, and transmission direction is opposite.
As further improvement of the invention, the monitoring CCD has wide responsive bandwidth, to transmitting laser and can defend
The sunlight wavelength of star reflection is responded, and realizes the monitoring to emitting laser and satellite.
Improved as of the invention further, the acousto-optic modulator be coated with match with the wavelength for emitting laser it is anti-reflection
Film, and to transmitting laser no polarization requirement, 3 ~ 8mm of clear aperture is 15 ~ 20mrad to light beam Deflection modulation.
As further improvement of the invention, the controllable aperture can be controlled to adjust, control range by electric drive
For 50 μm ~ 3mm.
It is improved as of the invention further, the detector, can be single-photon detector or other photodetectors, it can
Its working hour is controlled by electric drive.
Beneficial effects of the present invention are：The monitoring of laser real-time high-precision will be emitted during a kind of laser ranging by proposing
A kind of device can accurately monitor transmitting laser in real time, improve the aiming to detecting target in laser ranging.Specifically：
1, using right angle combinations of reflections mirror, realize that fraction of laser light in transmitting laser is parallel to be reversely incident to reception with transmitting laser
It is parallel when ensureing transmitting laser with monitoring beam high-precision real in telescope.
2, it using spectroscope, realizes and light path is divided into two-way, give monitoring CCD monitoring all the way, give detector all the way.
3, using acousto-optic modulator and controllable aperture light path, the deflection to detector light path in monitoring light path, drop are realized
The damage risk of low detector.
Description of the drawings
Fig. 1 is that a kind of laser ranging light beam described in the embodiment of the present invention is directed toward the device light path prison that real-time high-precision monitors
Depending on schematic diagram；
Fig. 2 is that a kind of device return laser beam of laser ranging light beam direction real-time high-precision monitoring described in the embodiment of the present invention connects
The schematic diagram of receipts；
Fig. 3 is the acousto-optic modulator operation principle for the device that laser ranging light beam as shown in Figure 1 is directed toward real-time high-precision monitoring
Figure.
Fig. 4 is that the acousto-optic modulator for the device that laser ranging light beam direction real-time high-precision monitoring as shown in Figure 1 is shown is opened
The sequence diagram of off status；
In figure, 1,45 ° of speculum；2, transmitter-telescope；21, transmitter-telescope concavees lens；21, transmitter-telescope convex lens；3、
Right angle combinations of reflections mirror；31, the one 45 ° of total reflective mirror；32, the 2nd 45 ° of total reflective mirror, 33, installation workpiece 4, receiving telescope；41、
Secondary mirror, 42, catadioptric mirror 43, primary mirror；5, spectroscope；6, CCD is monitored；7, acousto-optic modulator；8, controllable aperture；9, it collimates
Mirror；10, detector.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the present invention.
It is monitored as shown in Figure 1 to be directed toward real-time high-precision according to a kind of laser ranging light beam of one embodiment of the present of invention
The method shown includes 45 ° of reflectors 1 along transmitting laser optical path trend, transmitter-telescope 2, right angle combinations of reflections mirror 3, receives
Telescope 4, spectroscope 5, monitoring CCD 6, acousto-optic modulator 7, controllable aperture 8, collimating mirror 9, detector 10.
Emit laser by 45 ° of 1 reflectance-transmittance transmitter-telescopes 2 of speculum to right angle combinations of reflections mirror 3, the overwhelming majority swashs
Light penetrates right angle combinations of reflections mirror 3, and fraction of laser light is antiparallel to reception with transmitting laser through the right angle combinations of reflections mirror 3
Telescope 4；Received telescope 4 is transmitted to spectroscope 5, and fraction light is monitored CCD 6 through spectroscope 5 and monitors, most of
Light penetrates acousto-optic modulator 7 through spectroscope 5；Acousto-optic modulator 7 works at this time, and beam emissions deflect to controllable aperture 8
It is blocked on edge, controllable aperture 8 cannot be penetrated, collimating mirror 9 to detector 10 realizes the real-time high-precision of transmitting laser
Monitoring.
Wherein, transmitter-telescope 2 is made of concavees lens 21, convex lens 22, and it is convex lens 22 that telescope, which expands amplification factor,
Curvature divided by concavees lens 21 the obtained quotient of curvature；By adjusting concavees lens 21 with convex lens 22 apart from, it can be achieved that transmitting
The angle of divergence of laser is adjusted.Right angle combinations of reflections mirror 3 is by the one 45 ° of total reflective mirror 31, the 2nd 45 ° of total reflective mirror 32 and installation workpiece 33
Composition.One 45 ° of total reflective mirror 31 is coated with the reflectance coating consistent with transmitting optical maser wavelength, and the reflection power of reflectance coating is about ~ 20mW,
The reflectivity of reflectance coating is reflection power divided by transmitting laser power.2nd 45 ° of total reflective mirror 32 is coated with and transmitting optical maser wavelength one
The highly reflecting films of cause.The transmitting laser that right angle combinations of reflections mirror 3 reflects is substantially parallel with transmitting laser.Monitor that CCD 6 has width
Responsive bandwidth, transmitting laser and the sunlight wavelength of satellite reflection can be responded, be realized to transmitting laser and satellite
Monitoring.Acousto-optic modulator 7 has high transmittance to transmitting optical maser wavelength, requires transmitting laser no polarization, and clear aperture 3 ~
8mm is 15 ~ 20mrad to light beam Deflection modulation.Controllable aperture 8, can be controlled to adjust, control range 50 by electric drive
μm~3mm.Detector 10 can be single-photon detector or other photodetectors, its working hour can be controlled by electric drive.
Receiving telescope 4 is made of secondary mirror 41,42 primary mirror 43 of catadioptric mirror.
Again referring to Fig. 2, the return laser beam for being directed toward the device that real-time high-precision monitoring is shown for laser ranging light beam receives.Sound
Optical modulator 7 does not work, and return laser beam penetrates controllable aperture 8, and collimating mirror 9 to detector 10 is realized and returned to laser satellite
The detection of wave.
Again referring to Fig. 3, being acousto-optic modulator fundamental diagram, when acousto-optic modulator 7 does not work, light path does not occur partially
It moves；When acousto-optic modulator works, light path emits diffraction, and light path deviates original optical path.
Again referring to Fig. 4, being the sequence diagram of acousto-optic modulator on off state.When emitting Laser emission, 7 work of acousto-optic modulator
Make, the part transmitting laser and atmospheric scattering of the reflection of right-angle array mirror emitted the rear orientation light light path offset of laser originally back
Light path cannot penetrate controllable aperture.When the return laser beam of satellite reflection receives, acousto-optic modulator 7 does not work, return laser beam
Through aperture light path, is received and detect by detector 10.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of laser ranging light beam is directed toward the device of real-time high-precision monitoring, which is characterized in that including：
45 ° of reflectors（1）, transmitter-telescope（2）, right angle combinations of reflections mirror（3）, receiving telescope（4）, spectroscope（5）, monitoring
CCD （6）, acousto-optic modulator（7）, controllable aperture（8）, collimating mirror（9）, detector（10）.
2. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
Transmitter-telescope（2）By concavees lens（21）, convex lens（22）Composition, telescope amplification factor are the convex lens（22）Curvature
Divided by the concavees lens（21）The obtained quotient of curvature；By adjusting the concavees lens（21）With convex lens（22）Distance, can
Realize that the angle of divergence of transmitting laser is adjusted.
3. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
Right angle combinations of reflections mirror（3）By the one 45 ° of total reflective mirror（31）, the 2nd 45 ° of total reflective mirror（32）And installation workpiece (33) forms, it is described
One 45 ° of total reflective mirror is mutually perpendicular to the 2nd 45 ° of total reflective mirror, is installed to the installation workpiece (33), is firmly fixed
On telescope.
4. laser ranging light beam according to claim 3 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
One 45 ° of total reflective mirror (31) is coated with the reflectance coating consistent with transmitting optical maser wavelength, and the reflection power of reflectance coating is about ~ 20mW, instead
It is reflection power divided by transmitting laser power to penetrate rate；The 2nd 45 ° of total reflective mirror (32) is coated with consistent with transmitting optical maser wavelength
Highly reflecting films.
5. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
Right angle combinations of reflections mirror（3）The transmitting laser of reflection is substantially parallel with transmitting laser, and the direction of propagation is opposite.
6. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
It monitors that CCD has wide responsive bandwidth, the sunlight wavelength of transmitting optical maser wavelength and satellite reflection can be responded, be realized
To emitting the monitoring of laser and satellite.
7. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
Acousto-optic modulator 3 ~ 8mm of clear aperture, to light beam Deflection modulation be 15 ~ 20mrad, be coated with the height consistent with launch wavelength
Permeable membrane.
8. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
Controllable aperture（8）It is placed on the receiving telescope（4）The focal point of Path of Convergent Rays, can electric drive progress aperture tune
Section, adjustable range can be from 50 μm ~ 3mm.
9. laser ranging light beam according to claim 1 is directed toward the device of real-time high-precision monitoring, which is characterized in that described
Detector（6）For single-photon detector or the photodetector of other models, can realize to single photon or low light signals
Detection has very high sensitivity, its working hour can be controlled by electric drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810302063.0A CN108519591B (en) | 2018-04-04 | 2018-04-04 | Real-time high-precision monitoring device for laser ranging light beam pointing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810302063.0A CN108519591B (en) | 2018-04-04 | 2018-04-04 | Real-time high-precision monitoring device for laser ranging light beam pointing |
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| Publication Number | Publication Date |
|---|---|
| CN108519591A true CN108519591A (en) | 2018-09-11 |
| CN108519591B CN108519591B (en) | 2021-11-12 |
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| CN201810302063.0A Expired - Fee Related CN108519591B (en) | 2018-04-04 | 2018-04-04 | Real-time high-precision monitoring device for laser ranging light beam pointing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709667A (en) * | 2019-02-27 | 2019-05-03 | 中国科学院光电技术研究所 | A kind of separate type pyramid for adjusting mirror based on electricity |
| CN115327561A (en) * | 2022-08-29 | 2022-11-11 | 中国科学院云南天文台 | Laser ranging active tracking device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709667A (en) * | 2019-02-27 | 2019-05-03 | 中国科学院光电技术研究所 | A kind of separate type pyramid for adjusting mirror based on electricity |
| CN115327561A (en) * | 2022-08-29 | 2022-11-11 | 中国科学院云南天文台 | Laser ranging active tracking device |
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| Publication number | Publication date |
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| CN108519591B (en) | 2021-11-12 |
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