CN1340698A - Overall structure system for multi-wavelength laser radar with discrete units - Google Patents
Overall structure system for multi-wavelength laser radar with discrete units Download PDFInfo
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- CN1340698A CN1340698A CN00123646A CN00123646A CN1340698A CN 1340698 A CN1340698 A CN 1340698A CN 00123646 A CN00123646 A CN 00123646A CN 00123646 A CN00123646 A CN 00123646A CN 1340698 A CN1340698 A CN 1340698A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
An overall structural system for multi-wavelength laser radar with discrete units for probing ozone in atmosphere and aerosol in stratosphere is composed of host computer, power supply of lasre, laser, optical platform, emitting telescope, regulating lens, the second optical platform, monitor, top floor, observing dome chamber, receiving telescope, the third optical platform, light splitting and receiving system, control cabinet and optical shutter. Its advantages are high resistance to strong electromagnetic interference, low background noise and remote observation and operation.
Description
The invention belongs to the air pollution detecting technical field.Especially relate to a kind of general structure system that is used for atmospheric sounding ozone and the aerocolloidal multi-wavelength laser radar with discrete units of stratosphere.
Fig. 1 is the General Principle block scheme of laser radar, and the laser radar among the figure is by emission coefficient, control system, and input and disposal system and receiving system are formed.Wherein, laser transmitting system comprises laser instrument, transmitter-telescope etc.Transmitter-telescope is used for improving the Laser emission signal.Laser when transmitting, is subjected to the decay and the scattering of atmospheric medium through transmitter-telescope directive atmosphere in atmosphere.Backscatter signal wherein turns back to laser radar.The laser radar receiving system comprises parts such as receiving telescope, opto-electronic conversion and amplification.The laser light scattering signal that turns back to laser radar is received telescope and collects, and through links such as opto-electronic conversion amplifications, again by input and disposal system analysis and processing, obtains our needed atmospheric parameter and procedural information.Control system be used to control the emission of laser and reception synchronously and level, pitch rotation etc.
Survey ozone and stratospheric aerosol multi-wavelength laser radar and be a kind of laser radar with the high power laser emissive ability and heavy caliber (D=1m) receiving telescope, multi-wavelength (from ultraviolet to infrared), its detectivity is very strong, is the laser radar of present China bore maximum.
Fig. 2 is the functional-block diagram that the present invention is used for atmospheric sounding ozone and stratospheric aerosol multi-wavelength laser radar.Wherein, described multi-wavelength laser radar is by receiving telescope (1), light hurdle motor (2), smallcolumn diaphragm (3), optical gate blade (4), optical gate motor (5), quasi-optical mirror (6), 308nm light path (7), 355nm light path (8), 1060nm light path (9), 532nm light path (10), polarizing prism (11), 532nm horizontal polarization (12), 532nm vertical polarization (13), 355nm transmitter-telescope (14), 532nm transmitter-telescope (15), 308nm transmitter-telescope (16), 1060nm transmitter-telescope (17) is formed.
Multi-wavelength laser radar described in the figure has two high power lasers, and wherein the laser of three wavelength of Nd-YAG laser instrument output is respectively 1060nm, 532nm and 355nm; The XeCl laser output wavelength is 308nm.These laser expand bundle and compression angle of divergence directive atmosphere through transmitter-telescope, and receiving telescope is that a bore is Cassegrain's formula telescope of 1 meter, and focus is pulled out by the side commentaries on classics, and an adjustable field stop is arranged at the focus place.The place is provided with optical gate in perifocus, reduces the switch transit time of optical gate.The different wavelength of laser echo information that beam splitting system is collected laser radar is separated, and etc. on the photosurface of photoelectric commutator.Wherein 308nm, 355nm are ultraviolet band, adopt Detection of Weak Signals technology (photon counting technique) to detect, light signal 532nm, 1060nm adopt the simulating signal reception technique, and convert digital signal to by high-speed a/d and enter computing machine and carry out signal Processing.The signal of 532nm has three passages to receive, and wherein has two passages to be used for the detection laser atmosphere polarization information.
Control section comprises optical gate control, laser triggering control, received signal synchro control, telescope focusing control, receives field angle control (change field stop), optical filter selection control and the parallel adjustment of optical axis.
The general structure of laser radar directly has influence on the technical feature of complete machine, is restricting the technical indicator of each unit, is also determining the feasibility of complete machine general assembly, the economy of the accuracy of machine debugging and complete machine cost.As shown in Figure 3, present domestic and international its general structure of existing laser radar all adopts the structure of longitude and latitude ceremony.The laser radar of this longitude and latitude ceremony comprises, receiving telescope (1), transmitter-telescope (2), observation dome (3), beam split and receiving system and laser instrument (4) and support.
The principal feature of this longitude and latitude ceremony laser radar is that the Laser emission part all adopts rigid connection (comprising coaxial system and non co axial system) with the laser pick-off part.Though the laser instrument of the laser radar that has is not installed on the laser radar main frame, its transmitter-telescope and receiving telescope are still rigid attachment.Their major advantage is that globality is strong, but also exists following problem:
1. complete machine is debug complexity, and particularly the large laser radar generally will be debugged in factory-assembled, and dismounting re-assemblies debugging more at the scene then, and after component processing was shaped, range of adjustment was very limited.
2. the cost height owing to will guarantee assembly precision, therefore will improve the machining precision of each parts, and increases the adjusting environment.
3. the installing space of each parts is limited, poor expandability, and in a single day general structure is finished, and each parts is difficult to change, and will be very difficult as increasing receiving cable.
At above problem, the present invention has designed a kind of novel multi-wavelength laser radar structure.The principal feature of this structure is:
1. transmitter-telescope separates with receiving telescope, the parallel adjusting gear of optical axis is arranged at transmitter-telescope before, and laser instrument and transmitter-telescope be placed on the optical table, see shown in Figure 5;
2. in the receiving system of laser radar, receiving telescope adopts Cassegrain 2 formula systems, make and receive 90 ° of optical axis side commentaries on classics, and the beam split part of receiving system is also separated with receiving telescope with photoelectric conversion section, simultaneously beam splitter and photo-electric conversion element are installed on another optical table, see shown in Figure 4ly, form the distributed beam-splitting structure of platform.
3. in laser radar, be provided with the parallel adjusting gear of optical axis, guarantee the parallel of laser transmitting system and laser receiver system optical axis by this device, make each independently parts organically connect.
Fig. 1 represents the theory diagram of general laser radar;
Fig. 2 represents the synoptic diagram of the overall plan of multi-wavelength laser radar of the present invention;
Fig. 3 represents that present domestic and international existing its general structure of laser radar adopts the synoptic diagram of longitude and latitude ceremony structure;
Fig. 4 represents that the present invention installs the structural arrangement synoptic diagram of the optical table of beam splitter and photo-electric conversion element (as photomultiplier);
Fig. 5 represents the synoptic diagram of the parallel adjusting gear of optical axis that adopted in the multi-wavelength laser radar of the present invention;
Fig. 6 represents the structural representation (right figure) that traditional longitude and latitude laser radar structure (left figure) is compared with multi-wavelength laser radar structure of the present invention;
Fig. 7 represents to adopt the independently synoptic diagram of multi-wavelength laser radar structural system of each unit of the present invention.
Be described in detail below in conjunction with the general structure system of accompanying drawing multi-wavelength laser radar with discrete units of the present invention.
Referring to Fig. 4, multi-wavelength laser radar structural system of the present invention comprises: the laser instrument of a plurality of different emission, transmitter-telescope, receiving telescope, the parallel adjusting gear of optical axis, the opticator that is used for beam split or refractive power, photoelectric conversion section and receiving system, wherein, described transmitter-telescope separates with described receiving telescope, the parallel adjusting gear of described optical axis is arranged at before the described transmitter-telescope, described laser instrument and transmitter-telescope are arranged on the optical table, receiving telescope makes and receives 90 ° of optical axis side commentaries on classics in described receiving system, and the beam split part of receiving system is also separated with described receiving telescope with photoelectric conversion section (as photomultiplier), simultaneously the beam splitter of beam split part and the photo-electric conversion element of photoelectric conversion section are arranged on another optical table, form the distributed beam-splitting structure of platform.
Be provided with on the described optical table and receive main optical path (1), field stop (2) optical gate (3), quasi-optical mirror (4), the parallel adjusting mechanism of twin shaft (5), light splitting piece (6), 308nm photomultiplier (7), light splitting piece (8), 355nm photomultiplier (9), light splitting piece (10), 1060nm photomultiplier (11), light splitting piece (12), 532nm photon numeration (13), polarizing prism (14), 532nm analog signal instrumentation (15,16), as shown in Figure 4.
Fig. 7 represents an example schematic of the multi-wavelength laser radar general structure system that each unit of the present invention is relatively independent.Among the figure, described laser radar is by principal computer (7-1), Laser Power Devices (7-2), laser instrument (7-3), optical table (7-4), transmitter-telescope (7-5), adjust mirror (7-6), optical table (7-7), monitor (7-8), top floor (7-9), observation dome (7-10), receiving telescope (7-11), optical table (7-12), beam split and receiving system (7-13), control rack (7-14), optical gate (7-15) is formed.
Fig. 5 is the synoptic diagram of the parallel adjusting gear of optical axis of the present invention, semiconductor laser (1) wherein, excimer laser (2), 308nm transmitter-telescope (3), helium-neon laser (4), YAG laser instrument (5), 1060nm, 532nm, 355nm transmitter-telescope (6), enocscope (7), isosceles prism (8), receive primary mirror (9), receive secondary mirror (10), receive and turn to enocscope (11), field stop (12), quasi-optical mirror (13), the parallel adjustment enocscope of optical axis (14) movably, condenser (15), CCD pop one's head in (16), monitor (17), beam splitting system (18).This adjusting gear proposes in another part patented claim, so this paper is not described further.
Fig. 6 represents the structural representation (right figure) that traditional longitude and latitude laser radar structure (left figure) is compared with multi-wavelength laser radar structure of the present invention.Among the figure, be two 45 parallel adjustment mirrors of spending of accent twin shaft in the left figure.45 degree level crossings had not only risen and had turned to but also parallel as the bar twin shaft in the right figure.
The major advantage of multi-wavelength laser radar general structure of the present invention is:
1. assembling and precision governing loop between each unit be need not consider, design, processing, the assembling of the overall physical construction of laser radar, the complexity of debugging reduced.
2. except that receiving telescope, all parts, beam splitter etc. all independently are placed on the optical table, and the light path adjustment is simplified greatly, have reduced the linkage that complex optical path optics is adjusted.
3. because each unit is relatively independent, the sufficient mounting space is arranged, the beam split light path can afterwards extend or expand to both sides, and any parts all can be changed or be upgraded at any time, make whole laser radar have very strong adjustable transsexual and extensibility, make laser radar become a kind of novel laser acquisition experiment porch.
4. owing to simplified the complicacy of overall physical construction and reduced technical requirement such as quality of fit, the complete machine cost is reduced greatly.
5. owing to before the parallel adjusting gear of optical axis changes into transmitter-telescope, make the required plane of the parallel adjustment of optical axis adjust mirror and reduce to one on every road by original each at least two of light path of emission.(method originally should leveling row transfer coaxial, present method only to need the leveling row again) as shown in Figure 6.Make the parallel adjustment of optical axis simple, quick.
Since laser after transmitter-telescope expands bundle, the power density of unit area reduces, and has improved the security (high power laser radar often ablate the parallel adjustment mirror of optical axis, be most common failure) of the parallel adjustment mirror of optical axis, sees Fig. 6.
As can be seen from Figure 7, survey ozone and stratospheric aerosol multi-wavelength laser radar emission coefficient downstairs and receiving system upstairs in the dome.Because emission coefficient and receiving system are drawn distantly in the space, the strong electromagnetic that makes laser transmitting system produce when emission laser is many to the influence minimizing of the Testing of Feeble Signals generation of receiving system.Because the automaticity of system is higher, dome need not advance the people, more need not turn on light, and has significantly reduced the ground unrest of laser radar.The observation personnel only just can observe operation in the host computer machine room.
Any modification that those of ordinary skill in the art has done in the spirit and scope of the general structure system of the discrete units that does not depart from the described multi-wavelength laser radar of the invention described above or change all belong in the scope that claim of the present invention protects.
Claims (3)
1. general structure system that is used for atmospheric sounding ozone and the aerocolloidal multi-wavelength laser radar with discrete units of stratosphere, it is characterized in that described laser radar is by principal computer (7-1), Laser Power Devices (7-2), laser instrument (7-3), optical table (7-4), transmitter-telescope (7-5) is adjusted mirror (7-6), optical table (7-7), monitor (7-8), top floor (7-9), observation dome (7-10), receiving telescope (7-11), optical table (7-12), beam split and receiving system (7-13), control rack (7-14), optical gate (7-15) is formed.
2. the general structure system that is used for atmospheric sounding ozone and the aerocolloidal multi-wavelength laser radar with discrete units of stratosphere as claimed in claim 1, the laser instrument that it is characterized in that a plurality of different emission, transmitter-telescope, receiving telescope, the parallel adjusting gear of optical axis, the opticator that is used for beam split or refractive power, photoelectric conversion section and receiving system, wherein, described transmitter-telescope separates with described receiving telescope, the parallel adjusting gear of described optical axis is arranged at before the described transmitter-telescope, described laser instrument and transmitter-telescope are arranged on the optical table, receiving telescope makes and receives 90 ° of optical axis side commentaries on classics in described receiving system, and the beam split part of receiving system is also separated with described receiving telescope with photoelectric conversion section (as photomultiplier), simultaneously the beam splitter of beam split part and the photo-electric conversion element of photoelectric conversion section are arranged on another optical table, form the distributed beam-splitting structure of platform.
3. the general structure system that is used for atmospheric sounding ozone and stratospheric aerosol multi-wavelength laser radar with discrete units as claimed in claim 1, it is characterized in that being provided with on the described optical table reception main optical path (1), field stop (2) optical gate (3), quasi-optical mirror (4), the parallel adjusting mechanism of twin shaft (5), light splitting piece (6), 308nm photomultiplier (7), light splitting piece (8), 355nm photomultiplier (9), light splitting piece (10), 1060nm photomultiplier (11), light splitting piece (12), 532nm photon numeration (13), polarizing prism (14), 532nm analog signal instrumentation (15,16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00123646A CN1128371C (en) | 2000-08-24 | 2000-08-24 | Overall structure system for multi-wavelength laser radar with discrete units |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00123646A CN1128371C (en) | 2000-08-24 | 2000-08-24 | Overall structure system for multi-wavelength laser radar with discrete units |
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| Publication Number | Publication Date |
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| CN1340698A true CN1340698A (en) | 2002-03-20 |
| CN1128371C CN1128371C (en) | 2003-11-19 |
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| CN00123646A Expired - Fee Related CN1128371C (en) | 2000-08-24 | 2000-08-24 | Overall structure system for multi-wavelength laser radar with discrete units |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329742C (en) * | 2004-09-30 | 2007-08-01 | 中国科学院安徽光学精密机械研究所 | Laser radar control method based on image intensifier |
| CN100454038C (en) * | 2006-10-27 | 2009-01-21 | 中国科学院武汉物理与数学研究所 | Atmospheric turbulance detection laser rader using position-sensitive detector |
| CN1945356B (en) * | 2006-10-27 | 2010-05-12 | 武汉大学 | Multifunctional atmospheric laser radar |
| CN106067266A (en) * | 2016-07-18 | 2016-11-02 | 北方民族大学 | A kind of experiment porch of laser radar signal acquisition system |
| CN111537413A (en) * | 2020-06-09 | 2020-08-14 | 中国科学院大气物理研究所 | Sand and dust particle quantitative monitoring method based on single particle polarization characteristic self-adaption |
| CN112558106A (en) * | 2020-11-12 | 2021-03-26 | 北京遥测技术研究所 | Satellite-borne atmospheric ocean high repetition frequency laser radar system and detection method |
| CN113624650A (en) * | 2021-08-08 | 2021-11-09 | 安徽科创中光科技有限公司 | Portable PM2.5 particulate matter and ozone scanning laser radar |
-
2000
- 2000-08-24 CN CN00123646A patent/CN1128371C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329742C (en) * | 2004-09-30 | 2007-08-01 | 中国科学院安徽光学精密机械研究所 | Laser radar control method based on image intensifier |
| CN100454038C (en) * | 2006-10-27 | 2009-01-21 | 中国科学院武汉物理与数学研究所 | Atmospheric turbulance detection laser rader using position-sensitive detector |
| CN1945356B (en) * | 2006-10-27 | 2010-05-12 | 武汉大学 | Multifunctional atmospheric laser radar |
| CN106067266A (en) * | 2016-07-18 | 2016-11-02 | 北方民族大学 | A kind of experiment porch of laser radar signal acquisition system |
| CN111537413A (en) * | 2020-06-09 | 2020-08-14 | 中国科学院大气物理研究所 | Sand and dust particle quantitative monitoring method based on single particle polarization characteristic self-adaption |
| CN112558106A (en) * | 2020-11-12 | 2021-03-26 | 北京遥测技术研究所 | Satellite-borne atmospheric ocean high repetition frequency laser radar system and detection method |
| CN113624650A (en) * | 2021-08-08 | 2021-11-09 | 安徽科创中光科技有限公司 | Portable PM2.5 particulate matter and ozone scanning laser radar |
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| Publication number | Publication date |
|---|---|
| CN1128371C (en) | 2003-11-19 |
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