CN107064908A - A kind of multi-wavelength polarizes Raman lidar beam splitting system - Google Patents
A kind of multi-wavelength polarizes Raman lidar beam splitting system Download PDFInfo
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- CN107064908A CN107064908A CN201710277525.3A CN201710277525A CN107064908A CN 107064908 A CN107064908 A CN 107064908A CN 201710277525 A CN201710277525 A CN 201710277525A CN 107064908 A CN107064908 A CN 107064908A
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- light
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- splitting system
- polarizes
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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
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
-
- 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
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
Raman lidar beam splitting system, including light-dividing device are polarized the present invention relates to a kind of multi-wavelength, for the light received to be divided into at least two-way；At least two filtering apparatus, are respectively used to pass through different specified wavelength light, all the way light of the filtering apparatus correspondence transmission from the light-dividing device outgoing.The light received is divided into after at least two-way by beam splitting system, specified wavelength light is transmitted through by a filtering apparatus per road light, at least two filtering apparatus can pass through at least two specified wavelength light, the round-the-clock detection at least two parameters in the parameters such as Aerosol Extinction Coefficients, aerosol depolarization ratio, steam can be realized simultaneously, so as to reduce detection cost, the saving time simultaneously mitigates experimental work amount.
Description
Technical field
The present invention relates to atmospheric laser remote sensing technology field, more particularly to a kind of multi-wavelength polarization Raman lidar light splitting
System.
Background technology
Various change ceaselessly occurs for form, the property of atmospheric aerosol particle, and atmosphere vapour is this change of influence
The most important factor.Steam condenses on aerosol particle surface so that particle increases.This hydrophilic growth is to its optical property
Influence, it has also become the important research topic of aerosol and one, climate change field.
It, using laser as transmitting light source, is sharp using detecting technique means active remote sensing equipment that laser radar, which is,
The advanced Detection Techniques that light technology is combined with modern detecting technique.Because laser radar has detectivity height, space
The advantages of high resolution, it has also become carry out the effective ways of high-precision remote sensing to air, ocean and land at present.At present,
Laser radar is generally Single wavelength, single parameter measurement, in order to which the natural environment and climate for accurately studying and assessing aerosol and steam influences,
It is generally necessary to take multiple measurements, great amount of cost and time are expended.
The content of the invention
It is an object of the invention to improve not enough in the presence of prior art there is provided a kind of multi-wavelength to polarize raman laser
Radar beam splitting system.
In order to realize foregoing invention purpose, the embodiments of the invention provide following technical scheme：
A kind of multi-wavelength polarizes Raman lidar beam splitting system, including：
Light-dividing device, for the light received to be divided into at least two-way；
At least two filtering apparatus, are respectively used to pass through different specified wavelength light, a filtering apparatus correspondence is transmitted
From the light all the way of the light-dividing device outgoing.
In the scheme being more highly preferred to, said system also includes polarising means, for one of filtering apparatus to be exported
Polarization of light be horizontal light and vertical light.
In the scheme being more highly preferred to, said system also includes collector lens and photodetector, and the collector lens will
From the filtering apparatus or the light collection of the polarising means outgoing in the photodetector；The number of the collector lens
Amount is equal with the quantity of photodetector, is that the quantity of filtering apparatus plus 1.
As a kind of specific embodiment, the light-dividing device includes at least one dichroic piece, a dichroic piece
The light received is divided into two-way；When dichroic piece is two and the above, two and above dichroic piece are set gradually, preceding
One dichroic piece wherein all the way light as latter dichroic piece input light.
As a kind of specific embodiment, the first interferometric filter that centre wavelength is 355nm, centre wavelength are
The 3rd interferometric filter that 532nm the second interferometric filter, centre wavelength are 607nm, the 4th that centre wavelength is 660nm are dry
Relate to any at least two in the 5th interferometric filter that optical filter, centre wavelength are 1064nm.Pass through the interference of different wave length
Optical filter selects the light of needs.
As a kind of specific embodiment, the collector lens is planoconvex spotlight.The photodetector is photoelectricity times
Increase pipe or avalanche diode.
Compared with prior art, beneficial effects of the present invention：The light received is divided into after at least two-way by beam splitting system,
Specified wavelength light is transmitted through by a filtering apparatus per road light, at least two filtering apparatus can refer to through at least two
The long light of standing wave, you can at the same realize in the parameters such as Aerosol Extinction Coefficients, aerosol depolarization ratio, steam at least
The round-the-clock detection of two kinds of parameters, so as to reduce detection cost, the saving time simultaneously mitigates experimental work amount.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation that multi-wavelength provided in an embodiment of the present invention polarizes Raman lidar beam splitting system.
Description of symbols in figure
11- the first dichroic pieces；12- the second dichroic pieces；The dichroic pieces of 13- the 3rd；4th dichroic piece；21- is polarized
Prism；The interferometric filters of 31- first；The interferometric filters of 32- second；The interferometric filters of 33- the 3rd；The interferometric filters of 34- the 4th；
The interferometric filters of 35- the 5th；The planoconvex spotlights of 41- first；The planoconvex spotlights of 42- second；The planoconvex spotlights of 43- the 3rd；The plano-convexs of 44- the 4th
Lens；The planoconvex spotlights of 45- the 5th；The photomultipliers of 51- first；The photomultipliers of 52- second；The photomultipliers of 53- the 3rd；
The photomultipliers of 54- the 4th；The photomultipliers of 55- the 5th；61- avalanche diodes；9- data collecting systems；10- high voltage power supplies.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be arranged and designed with a variety of configurations herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.Meanwhile, the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relative importance.
Raman lidar beam splitting system is polarized the invention provides a kind of multi-wavelength, the beam splitting system includes light-dividing device
And filtering apparatus, wherein, light-dividing device is used to the light received being divided at least two-way；Filtering apparatus is at least two, one
Individual filtering apparatus correspondence transmits the light all the way from the light-dividing device outgoing, and at least two filtering apparatus are respectively used to through not
Same specified wavelength light.
As a kind of citing of embodiment, light-dividing device can include at least one dichroic piece, a dichroic
The light received is divided into two-way by piece；When dichroic piece is two and the above, two and above dichroic piece are set gradually,
Previous dichroic piece wherein all the way light as latter dichroic piece input light.
As a kind of citing of embodiment, filtering apparatus can be：Centre wavelength is 355nm the first interference filter
The second interferometric filter that piece, centre wavelength are 532nm, the 3rd interferometric filter that centre wavelength is 607nm, centre wavelength are
660nm the 4th interferometric filter, centre wavelength are any at least two in 1064nm the 5th interferometric filter.
In further perfect scheme, above-mentioned beam splitting system also includes polarising means, for one of filter to be filled
The polarization of light for putting output is horizontal light and vertical light.Polarising means can be devating prism.
In further perfect scheme, above-mentioned beam splitting system also includes collector lens and photodetector, described poly-
Optical lens by from the filtering apparatus or the light collection of the polarising means outgoing in the photodetector；The optically focused
The quantity of lens is equal with the quantity of photodetector, is that the quantity of filtering apparatus plus 1.Collector lens can be planoconvex spotlight,
Photodetector can be photomultiplier or avalanche diode.
Below in conjunction with the accompanying drawings and one more specifically embodiment Raman lidar light splitting system is polarized to the multi-wavelength
System is illustrated.
Referring to Fig. 1, present embodiments provide a kind of multi-wavelength polarization Raman lidar beam splitting system, mainly including the
One dichroic piece 11, the second dichroic piece 12, the 3rd dichroic piece 13, the 4th dichroic piece 14, devating prism 21, first are interfered
Optical filter 31, the second interferometric filter 32, the 3rd interferometric filter 33, the 4th interferometric filter 34, the 5th interferometric filter 35,
First planoconvex spotlight 41, the second planoconvex spotlight 42, the 3rd planoconvex spotlight 43, the 4th planoconvex spotlight 44, the 5th planoconvex spotlight 45,
Six planoconvex spotlights 46, the first photomultiplier 51, the second photomultiplier 52, the 3rd photomultiplier 53, the 4th photomultiplier transit
The photomultiplier 55 of pipe 54 and the 5th and avalanche diode 61.
Laser transmitting system launches beam of laser, the laser beam in an atmosphere from the atmospheric substance such as different particles, molecule
Generation scattering effect, produces scattered light, and wherein rear orientation light is reclaimed by optical receiving system, then by multi-wavelength polarization
Raman lidar beam splitting system carries out light-splitting processing, finally transfers to data collecting system 9 to carry out data acquisition.Optics receives system
The light that system is reclaimed is incident to the first dichroic piece 11, and light is divided into reflection and transmission two-way by the first dichroic piece 11, wherein
Transmission is transmitted backward all the way, and first interferometric filter 31 that passes through all the way of reflection filters out heterogeneous light, only allows wavelength to be 355nm light
Signal passes through, and is converged at by the first planoconvex spotlight 41 in the first photomultiplier 51；By the first dichroic piece 11 backward
The transmitted ray of transmission is directed to the second dichroic piece 12, is equally divided into two-way, continues to transmit backward all the way wherein transmiting, reflection
All the way then be used for carry out building for channel of polarization；By the reflection light after the second dichroic piece 12, the second interference is first passed through
Colour filter 32 filters out heterogeneous light, and the optical signal for only allowing wavelength to be 532nm passes through, then by devating prism 21, by wavelength 532nm
Light is divided into two-way, is all the way horizontal direction, is all the way vertical direction, and wherein transmissive portion is horizontal direction, and light passes through the
Two planoconvex spotlights 42 converge at the second photomultiplier 52, and reflecting part is vertical direction, and light passes through the 3rd planoconvex spotlight 43
Converge at the 3rd photomultiplier 53；The transmitted ray transmitted backward by the second dichroic piece 12 is incident to the 3rd dichroic
Light is divided into two-way by piece 13, the 3rd dichroic piece 13, and the light of wherein reflecting part is mainly used in vibrating Raman water vapor detecting,
Light passes through the 5th interference filter 35 and filters out heterogeneous light backward all the way for transmission, only allows the optical signal that wavelength is 1064nm to lead to
Cross, then converged at by the 6th planoconvex spotlight 46 in avalanche diode 61；For vibrating Raman water vapor detecting part, pass through the 3rd
The reflection light of dichroic piece 13 is incident to the 4th dichroic piece 14, is equally divided into two-way, and transmissive portion light passes through the 3rd
Interferometric filter 33 filters out heterogeneous light, and the nitrogen vibrating Raman scattered signal for only allowing wavelength to be 607nm passes through, then by Siping City
Convex lens 44 are converged in the 4th photomultiplier 54, and reflecting part light filters out heterogeneous light by the 4th interferometric filter 34,
The steam vibrating Raman scattered signal for only allowing wavelength to be 660nm passes through, then converges at the 5th photoelectricity by the 5th planoconvex spotlight 45
In multiplier tube 55.
The a length of 355nm of the received wave of first photomultiplier 51 signal；The a length of 532nm of the received wave of second photomultiplier 52
Signal in parallel direction；Signal in a length of 532nm vertical direction of the received wave of 3rd photomultiplier 53；4th photomultiplier transit
The a length of 607nm of the received wave of pipe 54 nitrogen vibrating Raman scattered signal；The a length of 660nm of the received wave of 5th photomultiplier 55 water
Vapour vibrating Raman scattered signal；The a length of 1064nm of avalanche diode received wave signal.
In the present embodiment, the wavelength of reception is converted into electric signal by the first photomultiplier 51 for 355nm optical signal,
Data collecting system 9 is transferred to, is analyzed and processed by data collecting system 9, it is aerosol rice grain pattern road finally to confirm the light path；Second
The wavelength of reception is converted into electric signal by photomultiplier 52 for the optical signal in 532nm parallel directions, is transferred to data acquisition
System 9, is analyzed and processed by data collecting system 9, finally confirms that the light path polarizes parallel channels for aerosol；3rd photomultiplier transit
The wavelength of reception is converted into electric signal by pipe 53 for the optical signal in 532nm vertical direction, is transferred to data collecting system 9, by
Data collecting system 9 is analyzed and processed, and finally confirms that the light path polarizes vertical channel for aerosol；4th photomultiplier 54 will connect
The wavelength of receipts is converted into electric signal for 660nm optical signal, data collecting system 9 is transferred to, by the analysis of data collecting system 9
Reason, it is steam vibrating Raman scatter channel finally to confirm the light path；The wavelength of reception is 607nm's by the 5th photomultiplier 55
Optical signal is converted into electric signal, is transferred to data collecting system 9, is analyzed and processed by data collecting system 9, finally confirms the light path
For nitrogen vibrating Raman scatter channel.
In the alternative of the present embodiment, as shown in figure 1, in order that detector normal work for it, it is necessary to provide height
Pressure；High-pressure installation 10 is the first photomultiplier 51, the second photomultiplier 52, the 3rd photomultiplier 53, the 4th photoelectricity times
Increase the photomultiplier 55 of pipe 54 and the 5th and negative high voltage is provided, voltage supply scope is 0 to -1300V；High-pressure installation 9 is avalanche diode
61 provide positive high voltage, and voltage supply scope is 0 to 350V.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.
Claims (8)
1. a kind of multi-wavelength polarizes Raman lidar beam splitting system, it is characterised in that including：
Light-dividing device, for the light received to be divided into at least two-way；
At least two filtering apparatus, are respectively used to pass through different specified wavelength light, a filtering apparatus correspondence is transmitted from institute
State the light all the way of light-dividing device outgoing.
2. multi-wavelength according to claim 1 polarizes Raman lidar beam splitting system, it is characterised in that also including polarization
Device, the polarization of light for one of filtering apparatus to be exported is horizontal light and vertical light.
3. multi-wavelength according to claim 2 polarizes Raman lidar beam splitting system, it is characterised in that also including optically focused
Lens and photodetector, the collector lens by from the filtering apparatus or the light collection of the polarising means outgoing in institute
State in photodetector；The quantity of the collector lens is equal with the quantity of photodetector, is that the quantity of filtering apparatus plus 1.
4. Raman lidar beam splitting system is polarized according to any described multi-wavelengths of claim 1-3, it is characterised in that described
Light-dividing device includes at least one dichroic piece, and the light received is divided into two-way by a dichroic piece；When dichroic piece is
Two and during the above, two and above dichroic piece are set gradually, previous dichroic piece wherein all the way light as latter
The input light of individual dichroic piece.
5. multi-wavelength according to claim 4 polarizes Raman lidar beam splitting system, it is characterised in that the optical filtering dress
It is set to：The first interferometric filter that centre wavelength is 355nm, the second interferometric filter that centre wavelength is 532nm, centre wavelength
For 607nm the 3rd interferometric filter, the 4th interferometric filter that centre wavelength is 660nm, centre wavelength are 1064nm
Any at least two in five interferometric filters.
6. multi-wavelength according to claim 4 polarizes Raman lidar beam splitting system, it is characterised in that the optically focused is saturating
Mirror is planoconvex spotlight.
7. multi-wavelength according to claim 4 polarizes Raman lidar beam splitting system, it is characterised in that the photoelectricity is visited
It is photomultiplier or avalanche diode to survey device.
8. multi-wavelength according to claim 4 polarizes Raman lidar beam splitting system, it is characterised in that the polarization dress
It is set to devating prism.
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| CN107727638A (en) * | 2017-11-02 | 2018-02-23 | 嘉兴镭光仪器科技有限公司 | A kind of laser Raman spectroscopy gas analyzer with resonator enhancing |
| CN108318890A (en) * | 2018-01-04 | 2018-07-24 | 西安理工大学 | A kind of aerosol detection radar system for making light source using white light LEDs |
| CN109187365A (en) * | 2018-08-22 | 2019-01-11 | 中国科学院上海光学精密机械研究所 | Ocean profile dual wavelength polarization optics parameter estimator instrument |
| CN109709345A (en) * | 2018-12-29 | 2019-05-03 | 迪瑞医疗科技股份有限公司 | One kind two is to beam splitting type blood coagulation test device |
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| CN109709345A (en) * | 2018-12-29 | 2019-05-03 | 迪瑞医疗科技股份有限公司 | One kind two is to beam splitting type blood coagulation test device |
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