CN111413710A - Raman-polarization laser radar system for cloud phase detection and identification - Google Patents
Raman-polarization laser radar system for cloud phase detection and identification Download PDFInfo
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Abstract
The invention discloses a Raman-polarization laser radar system for cloud phase detection and identification, which is characterized by comprising a laser emission module, a first detection module and a second detection module, wherein the first detection module comprises a first receiving system and an atmospheric three-phase water synchronous detection Raman laser radar subsystem; the second detection module comprises a second receiving system, an atmospheric aerosol and a cloud detection polarization laser radar subsystem, wherein the atmospheric aerosol and the cloud detection polarization laser radar subsystem comprise a primary long and short wave cut-off device and a secondary polarization device. The Raman laser radar subsystem can realize synchronous detection and inversion of liquid water, solid water, water-vapor mixing ratio and aerosol fluorescent signals in atmosphere and cloud through the atmosphere three-phase water synchronous detection, and realize polarization detection of an ultraviolet band, polarization detection of a visible band and detection of a 1064nm atmosphere meter-Rayleigh scattering signal through the atmosphere aerosol and cloud detection polarization laser radar subsystem.
Description
Technical Field
The invention belongs to the technical field of radar detection systems, and relates to a Raman-polarized laser radar system for cloud phase detection and identification.
Background
Cloud is the most important factor of global climate change and the most uncertain factor of various atmospheric models. The formation of cloud and the influence of precipitation on human life are profound, and the detection and identification of cloud phase state have very important scientific significance for the research of cloud physics, atmospheric radiation transmission and meteorological climate. Water is used as the only substance with phase state change, and the measurement of the three-phase water content in the cloud and the mutual transformation and evolution process thereof are extremely critical to the research of the cloud phase state.
The laser radar is used as an active detection technology, has the advantage of high space-time resolution compared with other atmospheric detection means, and is widely used for measuring atmospheric parameters. Currently, the polarization laser radar is applied to the discrimination of cloud phase and the detection of aerosol particles. However, it is difficult to accurately determine the cloud phase state only by using the polarization lidar technology at present due to the combined action of atmospheric factors, system elements, optical coupling effects between channels, and the like.
Disclosure of Invention
The invention aims to provide a Raman-polarized laser radar system for cloud phase detection and identification, which solves the problem that the cloud phase is difficult to accurately judge in the prior art.
The Raman-polarization laser radar system for cloud phase state detection and identification is characterized by comprising a laser emission module, a first detection module and a second detection module, wherein the first detection module comprises a first receiving system and an atmospheric three-phase water synchronous detection Raman laser radar subsystem; the second detection module comprises a second receiving system, an atmospheric aerosol and a cloud detection polarization laser radar subsystem, wherein the atmospheric aerosol and the cloud detection polarization laser radar subsystem comprise a primary long and short wave cut-off device and a secondary polarization device.
The invention is also characterized in that:
the laser emission module comprises a laser and a reflector, and laser generated by the laser enters the atmosphere through the reflector.
The first receiving system comprises a first telescope, an optical fiber, and a collimating lens L0The atmosphere back scattering echo signal received by the first telescope is coupled by the optical fiber and then is collimated by the collimating lens L0And outputting the parallel light, and finally entering an atmospheric three-phase water synchronous detection Raman laser radar subsystem.
The Raman laser radar subsystem for synchronously detecting the atmosphere three-phase water comprises a dichroic mirror DM1Dichroic mirror DM1The reflected light path is sequentially provided with an optical filter IF1Collimator lens L1A first photoelectric conversion device forming a first channel; dichroic mirror DM1A dichroic mirror DM is arranged on the transmission light path2Dichroic mirror DM2The reflected light path is sequentially provided with an optical filter IF2Collimator lens L2A second photoelectric conversion device forming a second channel; dichroic mirror DM2A beam splitter BS is arranged on the transmission light path1Beam splitter BS1A first optical filter and a collimating lens L arranged on the reflected light path in sequence3A third photoelectric conversion device forming a third channel, the first optical filter including an optical filter IF3And an optical filter IF4(ii) a Beam splitter BS1A second optical filter and a collimating lens L arranged on the transmission light path in sequence4A fourth photoelectric conversion device forming a fourth channel, the second filter including a filter IF5And an optical filter IF6。
The first channel is a Mi-Rayleigh scattering channel A, the second channel is a nitrogen Raman scattering channel, the third channel is a solid water Raman scattering and liquid water Raman scattering channel, and the fourth channel is a water vapor Raman scattering and fluorescence echo signal channel; optical filter IF3And an optical filter IF4Mounted on an electric wheel, filters IF3Optical filter IF4The interval time of (2) is 5 min; optical filter IF5And an optical filter IF6Mounted on an electric wheel, filters IF5And an optical filter IF6The interval time of (2) is 5 min; optical filter IF3Center wavelength of 400.0nm, bandwidth of 5.0nm, and peak transmittanceThe percent of pass is 50 percent; optical filter IF4The central wavelength is 403.5nm, the bandwidth is 5.0nm, and the peak transmittance is 80%; optical filter IF5The central wavelength is 407.6nm, and the bandwidth is 1.0 nm; optical filter IF6The center wavelength is 430nm and the bandwidth is 25 nm.
The second receiving system comprises a second telescope, a collimating lens L10The atmosphere backscattered echo signal received by the second telescope is coupled in space and then collimated by the collimating lens L0And the output is parallel light, and finally the parallel light enters an atmospheric aerosol and cloud detection polarization laser radar subsystem.
The first-stage long and short wave cut-off device comprises a dichroic mirror DM3Dichroic mirror DM3A dichroic mirror DM is arranged on the transmission light path4(ii) a The second-stage polarizing device comprises an ultraviolet polarizing unit and a visible polarizing unit, wherein the ultraviolet polarizing unit is positioned on the dichroic mirror DM3On the reflected light path, the visible polarization unit is located in the dichroic mirror DM4On the transmission and reflection light paths.
The ultraviolet polarization unit comprises a Polarization Beam Splitter (PBS)1Polarizing Beam Splitter (PBS)1The parallel polarization channels are sequentially provided with optical filters IF7Collimator lens L5A fifth photoelectric conversion device forming a fifth channel; polarization Beam Splitter (PBS)1The vertical polarization channel is sequentially provided with an optical filter IF8Collimator lens L6And a sixth photoelectric conversion device forming a sixth channel.
The visible polarization unit is included in the dichroic mirror DM4Filter IF arranged in sequence on transmission light path11(30) Collimator lens L9A seventh photoelectric conversion device forming a ninth channel; also includes a dichroic mirror DM4Polarization Beam Splitter (PBS) on reflection light path2Polarizing Beam Splitter (PBS)2The parallel polarization channels are sequentially provided with optical filters IF9Collimator lens L7An eighth photoelectric conversion device forming a seventh channel; polarization Beam Splitter (PBS)2The vertical polarization channel is sequentially provided with an optical filter IF10Collimator lens L8A ninth photoelectric conversion device forming an eighth switchAnd (4) carrying out the following steps.
The fifth channel and the sixth channel are polarization channels of ultraviolet bands; the seventh channel and the eighth channel are polarization channels of visible wave bands, and the ninth channel is a Mi-Rayleigh scattering channel B; the seventh photoelectric conversion device is a photoelectric detection device APD.
The invention has the beneficial effects that: the invention relates to a Raman-polarization laser radar system for cloud phase state detection and identification, wherein multi-wavelength laser emitted by a laser interacts with the atmosphere, and generated atmosphere backscattering echo signals are respectively coupled to an atmosphere three-phase state water synchronous detection Raman laser radar subsystem, an atmosphere aerosol and a cloud detection polarization laser radar subsystem and are divided into 9 detection channels in total, so that the synchronous detection of 11 kinds of atmosphere echo signals is realized; the synchronous detection and inversion of liquid water, solid water, water-vapor mixing ratio and aerosol fluorescent signals in the atmosphere and cloud can be realized through the atmospheric three-phase water synchronous detection Raman laser radar subsystem, and the polarization detection of an ultraviolet band, the polarization detection of a visible band and the detection of a 1064nm atmospheric meter-Rayleigh scattering signal are realized through the atmospheric aerosol and cloud detection polarization laser radar subsystem; the cloud structure parameter and the cloud optical parameter can be detected and inverted, and the synchronous information of multiple parameters including a cloud integral backscattering ratio, a cloud integral depolarization ratio, a depolarization ratio and the like can be obtained; the synchronous detection and inversion of multiple information such as scattering ratio and depolarization information in the cloud and three-phase water in the cloud are obtained, the cloud phase state can be comprehensively detected and identified through combined analysis, and the accuracy of cloud phase state identification is improved; the device can simultaneously realize the detection of the atmospheric three-phase water profile and the detection and analysis of the atmospheric aerosol, has wide application in the field of atmospheric aerosol research, and provides technical support and data guarantee for researches on cloud precipitation physics, artificial influence weather and the like.
Drawings
FIG. 1 is a schematic diagram of a Raman-polarized lidar system for cloud phase detection and identification according to the present invention;
FIG. 2a is a diagram showing the detection result of an atmospheric three-phase water synchronous detection Raman lidar subsystem in a Raman-polarized lidar system for cloud phase detection and identification according to the present invention;
FIG. 2b is a diagram of the detection results of the atmospheric aerosol and the cloud detection polarization lidar subsystem in the Raman-polarization lidar system for cloud phase detection and identification according to the present invention.
In the figure, 1 is the first telescope, 2 is the optical fiber, 3 is the collimating lens L 04. dichroic mirror DM1Filter IF16. collimating lens L 17. first photoelectric conversion device, 8. dichroic mirror DM2Optical filter IF210. collimating lens L211. second photoelectric conversion device, 12. beam splitter BS 113 first filter, 14 collimating lens L315 third photoelectric conversion device, 16 second optical filter, 17 collimating lens L 418 fourth photoelectric conversion device, 19 second telescope, 20 collimating lens L1021. dichroic mirror DM322 dichroic mirror DM423. polarizing beam splitter PBS1Filter IF, 24725. collimating lens L526 fifth photoelectric conversion device, 27 Filter IF828 collimating lens L 629 sixth photoelectric conversion device, 30 optical filter IF1131. collimating lens L 932. seventh photoelectric conversion device, 33. polarizing beam splitter PBS234. optical filter IF935 collimating lens L736 eighth photoelectric conversion device, 37 Filter IF1038. collimating lens L 839. ninth photoelectric conversion device, 40. laser, 41. mirror.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a Raman-polarization laser radar system for cloud phase detection and identification, which comprises a laser emission module, a first detection module and a second detection module, wherein the first detection module comprises a first receiving system and an atmosphere three-phase water synchronous detection Raman laser radar subsystem, the second detection module comprises a second receiving system, an atmosphere aerosol and a cloud detection polarization laser radar subsystem, and the atmosphere aerosol and the cloud detection polarization laser radar subsystem comprise a primary long and short wave cut-off device and a secondary polarization device, as shown in figure 1.
The laser emitting module comprises a laser 40 and a reflecting mirror 41, and laser light generated by the laser 40 enters the atmosphere through the reflecting mirror 41.
In this embodiment, the laser 40 is an Nd-YAG laser, and the laser 40 generates laser light having wavelengths of 1064nm, 532nm, and 355 nm.
The first receiving system comprises a first telescope 1, an optical fiber 2, a collimating lens L 03, the atmosphere back scattering echo signal received by the first telescope 1 is coupled by the optical fiber 2 and then is collimated by the collimating lens L0And 3, outputting the parallel light, and finally entering an atmospheric three-phase water synchronous detection Raman laser radar subsystem.
The first telescope 1 is a Newtonian telescope with a diameter of 600mm, and the collimating lens L0The focal length of 3 is 50 mm.
The Raman laser radar subsystem for synchronously detecting the atmosphere three-phase water comprises a dichroic mirror DM 14, dichroic mirror DM 14 optical filters IF are arranged on the reflected light path in sequence 15. Collimating lens L 16. A first photoelectric conversion device 7 forming a first channel, which is a Mi-Rayleigh scattering channel A; dichroic mirror DM 14 dichroic mirror DM is arranged on the transmission light path 28, dichroic mirror DM 28 optical filters IF are arranged on the reflected light path in sequence29. Collimating lens L 210. A second photoelectric conversion device 11 forming a second channel, which is a nitrogen raman scattering channel; dichroic mirror DM2A beam splitter BS is arranged on the 8 transmission light path112, beam splitter BS1A first optical filter 13 and a collimating lens L arranged on the 12 reflection light path in sequence 314. A third photoelectric conversion device 15 forming a third channel, the first optical filter 13 including an optical filter IF3And an optical filter IF4The third channel is a solid water Raman scattering channel and a liquid water Raman scattering channel, and the optical filter IF in the third channel3And an optical filter IF4The electric rotating wheel is adopted for control, so that the time-sharing detection of the solid water Raman scattering echo signals and the liquid water Raman scattering echo signals is realized, and the time interval is 5 minutes. The detection signal-to-noise ratio of the system to the three-phase water Raman channel can be improved. Beam splitter BS112, a second filter 16 and a collimating lens L are sequentially arranged on the transmission light path417. A fourth photoelectric conversion device 18 forming a fourth channel, the second filter 16 including a filter IF5And an optical filter IF6The fourth channel is a water vapor Raman scattering and fluorescence echo signal channel, and the optical filter IF in the fourth channel5And an optical filter IF6The electric rotating wheel is adopted for control, the time-sharing detection of the atmospheric water vapor Raman scattering signal and the atmospheric aerosol fluorescence spectrum signal is realized, the time interval is 5 minutes, the synchronous monitoring of the atmospheric aerosol fluorescence effect can be realized, and the correction function on the accurate inversion of atmospheric three-phase water, particularly cloud phase water, is realized.
The second receiving system comprises a second telescope 19, a collimating lens L 1020, received by the second telescope 19The gas back-scattered echo signals are spatially coupled and collimated by collimating lens L0And 3, outputting the parallel light, and finally entering an atmospheric aerosol and cloud detection polarization laser radar subsystem. In this embodiment, the second telescope 19 is a Cassegrain telescope with a diameter of 200 mm.
The first-stage long and short wave cut-off device comprises a dichroic mirror DM321 dichroic mirror DM321 a dichroic mirror DM is arranged on the transmission light path422; the second-stage polarizing device comprises an ultraviolet polarizing unit and a visible polarizing unit, wherein the ultraviolet polarizing unit is positioned on the dichroic mirror DM321, the visible polarizing element is located in the dichroic mirror DM422 on the transmission and reflection paths. Dichroic mirror DM321 has cut-off wavelength of 484nm, high efficiency transmission of optical signals with spectral range of more than 484nm, 98 percent of transmissivity, high reflectivity of spectral signals with wavelength of less than 480nm, 98 percent of reflectivity and 10 percent of inhibition rate5The above. Dichroic mirror DM422 at a cut-off wavelength of 560nm, spectral signals having a wavelength of less than 560nm will be reflected with high efficiency, spectral signals having a wavelength of greater than 560nm will be transmitted with high efficiency, with 99% and 98% reflectivity and transmission, respectively.
The ultraviolet polarization unit comprises a Polarization Beam Splitter (PBS)123 polarizing beam splitter PBS 123, filters IF are arranged on the parallel polarization channels in sequence 724. Collimating lens L525. A fifth photoelectric conversion device 26 forming a fifth channel; polarization Beam Splitter (PBS)123 are sequentially provided with optical filters IF827. Collimating lens L 628. And a sixth photoelectric conversion device 29 forming a sixth channel. Beam splitter BS112 wavelength of 355nm, filter IF724. Optical filter IF827 have a central wavelength of 354.78nm and a bandwidth of 0.5nm, and extract parallel and vertically polarized atmospheric echo signals with a wavelength of 355 nm. The fifth photoelectric conversion device 26 and the sixth photoelectric conversion device 29 are photomultiplier tubes PMT, and the fifth channel and the sixth channel are polarization channels of ultraviolet band.
The visible polarization unit is included in the dichroic mirror DM422 are arranged on the transmission light path in sequenceIF filter1130. Collimating lens L931. A seventh photoelectric conversion device 32 forming a ninth channel, which is a mie-rayleigh scattering channel B; also includes a dichroic mirror DM422 polarization beam splitter PBS on reflection light path233 polarizing beam splitter PBS233 are sequentially provided with optical filters IF934. Collimating lens L 735. An eighth photoelectric conversion device 36 forming a seventh channel; polarization Beam Splitter (PBS)233 are sequentially provided with optical filters IF1037. Collimating lens L 838. The ninth photoelectric conversion device 39 forms an eighth channel, and the seventh channel and the eighth channel are polarization channels of a visible wavelength band.
Polarization Beam Splitter (PBS)233 wavelength of 532nm, filter IF934. Optical filter IF1037, the central wavelength of which is 532.1nm and the bandwidth of which is 0.5nm, and extracting parallel and vertical polarization atmosphere echo signals of which the central wavelength is 532 nm; optical filter IF11The center wavelength of 30 is 1064.1nm, and the bandwidth is 0.5 nm; the seventh photoelectric conversion device 32 is a photoelectric detection device APD, the eighth photoelectric conversion device 36 and the ninth photoelectric conversion device 39 are photomultiplier tubes PMT of which the model is R7056.
The working principle of the Raman-polarized laser radar system for cloud phase detection and identification is as follows:
laser light of 1064nm, 532nm and 355nm generated by a laser 40 enters the atmosphere through a high-threshold laser reflector 41, and atmosphere backscattering echo signals are respectively received by a first telescope 1 and a second telescope 19, then are respectively coupled to an atmosphere three-phase water synchronous detection Raman laser radar subsystem, an atmosphere aerosol and a cloud detection polarization laser radar subsystem, and are totally divided into 9 detection channels, so that synchronous detection of 11 atmosphere echo signals is realized.
Atmospheric backscattering echo signals received by the first telescope 1 are coupled through the optical fiber 2, output as parallel light through the collimating lens L0 and enter an atmospheric three-phase water synchronous detection Raman laser radar subsystem, and are firstly subjected to dichroic mirror DM14 separation into reflection and transmissionTwo-part, dichroic mirror DM14 reflected light passes through a narrow bandwidth filter IF15, extracting atmospheric Mi-Rayleigh scattering signals with the central wavelength of 354.7nm, and performing photoelectric conversion and collection through a first photoelectric conversion device 7; dichroic mirror DM14 transmission light passes through dichroic mirror DM2After 8, the light is separated into two parts of reflection and transmission, namely a dichroic mirror DM28 reflected light passes through narrow bandwidth filter IF29, extracting nitrogen Raman scattering signals with the central wavelength of 386.7nm, and performing photoelectric conversion and collection by using a second photoelectric conversion device 11; through a dichroic mirror DM28, mainly comprising Raman scattering echo signals of atmospheric solid water, liquid water and water vapor with the spectral range larger than 395 nm; passes through a beam splitter BS112 is then divided into two parts, a beam splitter BS112 reflected light passes through the filter IF3And an optical filter IF4Optical filter IF3Extracting solid-state water Raman echo signal with central wavelength of 400.0nm, and optical filter IF4Extracting a liquid water Raman echo signal with the central wavelength of 403.5nm, and performing photoelectric conversion and acquisition through a third photoelectric conversion device 15; beam splitter BS112 through the filter IF5And an optical filter IF6Optical filter IF5Extracting water vapor Raman echo signal with central wavelength of 407.6nm, and optical filter IF6An aerosol fluorescence signal with a central wavelength of 430nm is extracted, and then subjected to photoelectric conversion and collection by a fourth photoelectric conversion device 18.
The atmospheric back scattering echo signal received by the second telescope 19 is coupled to the atmospheric aerosol and the cloud detection polarization lidar subsystem through spatial light; atmosphere echo signal is firstly reflected by dichroic mirror DM321 into two parts, reflection and transmission, dichroic mirror DM321 through a polarizing beam splitter PBS 123 forming parallel polarization channels and vertical polarization channels, respectively, by optical filters IF724. Optical filter IF827, filtering, extracting polarization signals of parallel and vertical ultraviolet bands with central wavelength of 354.78nm, and performing photoelectric conversion and collection through a fifth photoelectric conversion device 26 and a sixth photoelectric conversion device 29 respectively; dichroic mirrorDM321 through dichroic mirror DM422 into two parts of reflection and transmission, dichroic mirror DM422 through a polarizing beam splitter PBS233 forming parallel polarization channels and vertical polarization channels, respectively, by filters IF934. Optical filter IF1037, extracting polarization signals of parallel and vertical visible wave bands with the central wavelength of 532nm, and performing photoelectric conversion and collection through an eighth photoelectric conversion device 36 and a ninth photoelectric conversion device 39 respectively; dichroic mirror DM422, through a filter IF1130, extracting atmospheric Mi-Rayleigh scattering signals with the central wavelength of 1064nm, and then carrying out photoelectric conversion and collection by a seventh photoelectric conversion device 32.
Fig. 2 is an example of the results of detecting 11-channel atmospheric echo signals using the raman-polarization lidar system for cloud phase detection and identification of the present invention. Fig. 2a shows the results of the atmospheric echo signal distance correction square signals obtained by the atmospheric three-phase water synchronous detection raman lidar subsystem, which are the mie-rayleigh scattering, nitrogen raman scattering, water vapor raman scattering, liquid water raman scattering, solid water raman scattering and fluorescence echo signals, respectively, and obtain effective detection of cloud layers with a height of more than 3.5 km. In the cloud layer, the echo signals of the atmospheric three-phase water are obviously and synchronously increased, and meanwhile, the obvious aerosol fluorescence effect in the cloud layer is also monitored. Fig. 2b shows the results of the distance-corrected square signals of the atmospheric echo signals of 5 channels of the atmospheric aerosol and cloud detection polarization lidar subsystem, which are respectively the m-rayleigh scattering signal of 1064nm, the 532nm parallel and vertical polarization echo signal and the 355nm parallel and vertical polarization echo signal, and also realizes the detection of the cloud layer at the height of 3.5km, and the detection distance reaches more than 5 km. By the synchronous atmospheric echo signals, synchronous and accurate inversion of cloud structure parameters, cloud optical parameters and the mixing ratio of three-phase water in the cloud can be performed, and recognition, detection and research on cloud phase states are realized.
Through the mode, the Raman-polarization laser radar system for cloud phase state detection and identification is characterized in that multi-wavelength laser emitted by a laser interacts with the atmosphere, and generated backscattering echo signals are respectively coupled to an atmosphere three-phase state water synchronous detection Raman laser radar subsystem, an atmosphere aerosol and a cloud detection polarization laser radar subsystem and are divided into 9 detection channels in total, so that the synchronous detection of 11 atmosphere echo signals is realized; the atmosphere three-phase water synchronous detection Raman laser radar subsystem can realize the synchronous detection and inversion of liquid water, solid water and water vapor mixing and aerosol fluorescent signals in the atmosphere and cloud, the atmosphere aerosol and cloud detection polarization laser radar subsystem can realize the polarization detection of an ultraviolet band, the polarization detection of a visible band and the detection of a 1064nm atmosphere meter-Rayleigh scattering signal, and can obtain the detection and inversion of cloud structure parameters and cloud optical parameters, and the synchronous information contains multiple parameters such as a cloud integral backscattering ratio, a cloud integral depolarization ratio, a depolarization ratio and the like; the synchronous detection and inversion of multiple information such as the scattering ratio of three-phase water in the cloud and cloud integral, depolarization information and the like are obtained, the comprehensive detection and identification of the cloud phase state can be realized through combined analysis, and the accuracy of cloud phase state identification is improved; the device can simultaneously realize the detection of the atmospheric three-phase water profile and the detection and analysis of the atmospheric aerosol, has wide application in the field of atmospheric aerosol research, and provides technical support and data guarantee for researches on cloud precipitation physics, artificial influence weather and the like.
Claims (10)
1. A Raman-polarization laser radar system for cloud phase detection and identification is characterized by comprising a laser emission module, a first detection module and a second detection module, wherein the first detection module comprises a first receiving system and an atmospheric three-phase water synchronous detection Raman laser radar subsystem; the second detection module comprises a second receiving system, an atmospheric aerosol and a cloud detection polarization laser radar subsystem, wherein the atmospheric aerosol and the cloud detection polarization laser radar subsystem comprise a primary long and short wave cut-off device and a secondary polarization device.
2. A raman-polarized lidar system for cloud phase detection and identification according to claim 1 wherein the lasing module comprises a laser (40) and a mirror (41), the laser light generated by the laser (40) entering the atmosphere via the mirror (41).
3. A raman-polarized lidar system for cloud phase detection and identification according to claim 1, wherein the first receiving system comprises a first telescope (1), an optical fiber (2), a collimating lens L0(3) The atmosphere back scattering echo signal received by the first telescope (1) is coupled by the optical fiber (2) and then is collimated by the collimating lens L0(3) And outputting the parallel light, and finally entering an atmospheric three-phase water synchronous detection Raman laser radar subsystem.
4. The system of claim 1, wherein the atmospheric triphase water-synchronous Raman detection lidar subsystem comprises a dichroic mirror DM1(4) Said dichroic mirror DM1(4) The reflected light path is sequentially provided with an optical filter IF1(5) Collimator lens L1(6) A first photoelectric conversion device (7) forming a first channel; the dichroic mirror DM1(4) A dichroic mirror DM is arranged on the transmission light path2(8) Said dichroic mirror DM2(8) The reflected light path is sequentially provided with an optical filter IF2(9) Collimator lens L2(10) A second photoelectric conversion device (11) forming a second channel; the dichroic mirror DM2(8) A beam splitter BS is arranged on the transmission light path1(12) Said beam splitter BS1(12) A first optical filter (13) and a collimating lens L are sequentially arranged on the reflected light path3(14) A third photoelectric conversion device (15) forming a third channel, the first optical filter (13) including an optical filter IF3And an optical filter IF4(ii) a The beam splitter BS1(12) A second optical filter (16) and a collimating lens L are sequentially arranged on the transmission light path4(17) A fourth photoelectric conversion device (18) forming a fourth channel, the second filter (16) including a filter IF5And an optical filter IF6。
5. The Raman-polarized laser for cloud phase detection and identification according to claim 4The system is characterized in that the first channel is a Mi-Rayleigh scattering channel A, the second channel is a nitrogen Raman scattering channel, the third channel is a solid water Raman scattering channel and a liquid water Raman scattering channel, and the fourth channel is a water vapor Raman scattering and fluorescence echo signal channel; the filter IF3And an optical filter IF4Mounted on an electric runner, said filter IF3Optical filter IF4The interval time of (2) is 5 min; the filter IF5And an optical filter IF6Mounted on an electric runner, said filter IF5And an optical filter IF6The interval time of (2) is 5 min; the filter IF3The central wavelength is 400.0nm, the bandwidth is 5.0nm, and the peak transmittance is 50%; the filter IF4The central wavelength is 403.5nm, the bandwidth is 5.0nm, and the peak transmittance is 80%; the filter IF5The central wavelength is 407.6nm, and the bandwidth is 1.0 nm; the filter IF6The center wavelength is 430nm and the bandwidth is 25 nm.
6. A raman-polarized lidar system for cloud phase detection and identification according to claim 1, wherein the second receiving system comprises a second telescope (19), a collimating lens L10(20) The atmosphere backscattering echo signal received by the second telescope (19) is coupled in space and then is collimated by the collimating lens L0(3) And the output is parallel light, and finally the parallel light enters an atmospheric aerosol and cloud detection polarization laser radar subsystem.
7. A raman-polarized lidar system for cloud phase detection and identification according to claim 1, wherein the first order short wavelength cutoff device comprises a dichroic mirror DM3(21) Said dichroic mirror DM3(21) A dichroic mirror DM is arranged on the transmission light path4(22) (ii) a The second-stage polarizing device comprises an ultraviolet polarizing unit and a visible polarizing unit, wherein the ultraviolet polarizing unit is positioned on the dichroic mirror DM3(21) On the reflected light path of (2), the visible polarization unit being located in the dichroic mirror DM4(22) On the transmission and reflection light paths.
8. The Raman-polarized lidar system for cloud phase detection and identification according to claim 7, wherein the ultraviolet polarization unit comprises a Polarizing Beam Splitter (PBS)1(23) The polarizing beam splitter PBS1(23) The parallel polarization channels are sequentially provided with optical filters IF7(24) Collimator lens L5(25) A fifth photoelectric conversion device (26) forming a fifth channel; the polarizing beam splitter PBS1(23) The vertical polarization channel is sequentially provided with an optical filter IF8(27) Collimator lens L6(28) And a sixth photoelectric conversion device (29) forming a sixth channel.
9. The Raman-polarized lidar system for cloud phase detection and identification according to claim 7, wherein the visible polarization unit is included in the dichroic mirror DM4(22) Filter IF arranged in sequence on transmission light path11(30) Collimator lens L9(31) A seventh photoelectric conversion device (32) forming a ninth channel; further comprising a dichroic mirror DM located in said dichroic mirror4(22) Polarization Beam Splitter (PBS) on reflection light path2(33) The polarizing beam splitter PBS2(33) The parallel polarization channels are sequentially provided with optical filters IF9(34) Collimator lens L7(35) An eighth photoelectric conversion device (36) forming a seventh channel; the polarizing beam splitter PBS2(33) The vertical polarization channel is sequentially provided with an optical filter IF10(37) Collimator lens L8(38) And a ninth photoelectric conversion device (39) forming an eighth channel.
10. The raman-polarization lidar system for cloud phase detection and identification according to claim 9, wherein the fifth channel and the sixth channel are polarization channels of ultraviolet band; the seventh channel and the eighth channel are polarization channels of visible wave bands, and the ninth channel is a Mi-Rayleigh scattering channel B; the seventh photoelectric conversion device (32) is a photo-detector device APD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357892.6A CN111413710B (en) | 2020-04-29 | 2020-04-29 | Raman-polarization laser radar system for cloud phase detection and identification |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904308A (en) * | 2021-01-27 | 2021-06-04 | 西安理工大学 | Laser radar system and method for detecting cloud phase state and cloud water content |
| CN113126063A (en) * | 2021-04-21 | 2021-07-16 | 西安理工大学 | Device for detecting full stokes vector of laser radar echo in real time |
| CN113740877A (en) * | 2021-07-21 | 2021-12-03 | 万合(洛阳)光电技术有限公司 | Low-noise all-time water vapor laser radar detection system |
| CN115684025A (en) * | 2022-09-23 | 2023-02-03 | 长春理工大学 | Cloud state polarization detection device and detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830107A (en) * | 2012-09-04 | 2012-12-19 | 南京信息工程大学 | Laser radar detection method and system for measuring contents of solid water and liquid water in cloud |
| CN105738916A (en) * | 2016-03-01 | 2016-07-06 | 南昌航空大学 | High spectral polarization atmosphere detection laser radar system and control method |
| WO2017177710A1 (en) * | 2016-04-13 | 2017-10-19 | 武汉大学 | Laser radar system capable of simultaneously measuring raman spectra of water and fluorescence spectra of aerosol in atmosphere |
-
2020
- 2020-04-29 CN CN202010357892.6A patent/CN111413710B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830107A (en) * | 2012-09-04 | 2012-12-19 | 南京信息工程大学 | Laser radar detection method and system for measuring contents of solid water and liquid water in cloud |
| CN105738916A (en) * | 2016-03-01 | 2016-07-06 | 南昌航空大学 | High spectral polarization atmosphere detection laser radar system and control method |
| WO2017177710A1 (en) * | 2016-04-13 | 2017-10-19 | 武汉大学 | Laser radar system capable of simultaneously measuring raman spectra of water and fluorescence spectra of aerosol in atmosphere |
Non-Patent Citations (1)
| Title |
|---|
| 刘东等: "三波长拉曼偏振激光雷达系统研制及探测个例", 《光学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904308A (en) * | 2021-01-27 | 2021-06-04 | 西安理工大学 | Laser radar system and method for detecting cloud phase state and cloud water content |
| CN112904308B (en) * | 2021-01-27 | 2024-04-30 | 西安理工大学 | Laser radar system and method for detecting cloud phase state and cloud water content |
| CN113126063A (en) * | 2021-04-21 | 2021-07-16 | 西安理工大学 | Device for detecting full stokes vector of laser radar echo in real time |
| CN113740877A (en) * | 2021-07-21 | 2021-12-03 | 万合(洛阳)光电技术有限公司 | Low-noise all-time water vapor laser radar detection system |
| CN115684025A (en) * | 2022-09-23 | 2023-02-03 | 长春理工大学 | Cloud state polarization detection device and detection method |
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