CN107272023B - A kind of device measuring the non-homogeneous horizontal air Aerosol Extinction in sea level - Google Patents
A kind of device measuring the non-homogeneous horizontal air Aerosol Extinction in sea level Download PDFInfo
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- CN107272023B CN107272023B CN201710447950.2A CN201710447950A CN107272023B CN 107272023 B CN107272023 B CN 107272023B CN 201710447950 A CN201710447950 A CN 201710447950A CN 107272023 B CN107272023 B CN 107272023B
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- G—PHYSICS
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Abstract
The invention discloses a kind of devices for measuring the non-homogeneous horizontal air Aerosol Extinction in sea level, wherein, laser is divided into the first light beam and the second light beam by spectroscope, first light beam is for being emitted directly toward in the horizontal air of extinction coefficient profile to be measured, the reflection of second light beam, which is injected in photodiode, is converted into electric signal from optical signal, after be transmitted to Pico digital oscilloscope, catadioptric astronomical telescope collects the back scattered echo-signal of the non-homogeneous horizontal air in sea level, condenser lens focuses on atmospheric backscatter echo-signal on filter plate, gate photomultiplier tube is used to convert electric signal for optical signal segmentation, electric signal amplification is exported to Pico digital oscilloscope, processor is used for data processing, it is also used to issue control signal to control the enabling delay time of gate photomultiplier tube and adjust the amplification of controllable amplification module Multiplying power.The device of the invention can be used for Measuring Oceanic lower atmosphere layer or the extinction coefficient profile for atmosphere on seaborne horizontal direction.
Description
Technical field
The invention belongs to atmospheric optics fields of measurement, more specifically, a kind of be based on improved Mie formula scattering laser radar
Marine atmosphere aerosol Horizontal extinction coefficient profile measuring device.
Background technique
In recent years, with economic rapid development, the destruction of environment is also increasingly severe, and the pollution of especially atmosphere is tight
The health and daily life of people are influenced again, and therefore, carrying out detection study to atmosphere seems more important.
Well known atmospheric visibility (Visibility) is able to reflect the transparency of atmosphere, is and Atmospheric Survey
One of relevant physical quantity.Atmospheric visibility is an important meteorological observation element, and the forecast of visibility value is applied not only to gas
As the synoptic analysis of department, moreover it is possible to be widely used in the communications and transportation such as aviation, navigation, highway, military affairs and environmental monitoring
Equal fields.
Measurement essence to atmospheric visibility is the measurement to Aerosol Extinction.Aerosol detection technology mainly can be with
It is divided into two major classes: passive detection and active probe.Wherein, passive detection is mainly detected with ground too comprising satellite passive remote sensing again
Positive radiometer etc..Active probe, that is, laser radar detection.
Laser radar for atmospheric aerosol detection have the characteristics that investigative range extensively and high-spatial and temporal resolution, in recent years by
It is widely used in atmosphere and environmental testing.Laser radar can obtain abundant as a kind of active remote sensing prospecting tools
The relevant optical characteristics of aerosol, and accurate aerosol optical characteristics information can be provided, laser radar can be with satellite
Or aerial remote sensing detection combines, the scope of application is relatively broad.
Using laser radar detection Aerosol Extinction Coefficients, it is usually directed to vertical atmosphere.Obtaining vertical atmosphere
The extinction coefficient profile inverting in vertical direction is carried out using Fernald method after laser radar data.However, on ocean
Horizontal air aerosol optical characteristics detection be also very it is necessary to.Because obtaining ship in real time during ship's navigation
Horizontal air visibility variation around only can be to avoid the safety problems of navigation because of the too low initiation of visibility.It is prior,
In terms of Military Application, the Aerosol Extinction distribution for obtaining region between naval vessel has laser communication realizing efficient naval vessel
Very important meaning.
However, existing, for horizontal air measurement of extinction coefficient technology, there are certain limitations, and measured value is inaccurate,
There is no the value of practical application.Because in the prior art, laser radar system to be used for the process of horizontal air gasoloid
In, usually first assume that atmosphere is uniformly distributed, and then obtains a fixed extinction coefficient value using Slope Method inverting.But
In actual conditions, the equally distributed hypothesis of atmospheric level is simultaneously invalid.Especially on ocean, since special weather conditions are led
Cause the condensation vapor aggregation on ocean in lower atmosphere layer to generate sea fog.This sea fog thickness is usually in several hundred rice to thousands of rice
Differ.Laser radar is usually kilometers to the distance range of aerosol detection, then big to assuming in the case where there are sea fog
Gas is uniformly distributed, it is clear that can not obtain accurate Aerosol Extinction value.
It is non-homogeneous horizontal big sea level can be accurately measured therefore, it is necessary to be improved to existing apparatus or method
Gas Aerosol Extinction.
Summary of the invention
In view of the drawbacks of the prior art and Improvement requirement, the present invention provide a kind of non-homogeneous horizontal air gas in measurement sea level
The device of colloidal sol extinction coefficient improves existing device by ingenious setting optical device, and the device of the invention is available
It in Measuring Oceanic lower atmosphere layer or is the extinction coefficient profile of atmosphere on seaborne horizontal direction.
To achieve the above object, the present invention provides a kind of non-homogeneous horizontal air Aerosol Extinctions in measurement sea level
Device, which is characterized in that it includes laser, laser power supply, astronomical telescope of turning back, condenser lens, optical filter, gate
Photomultiplier tube, spectroscope, PIN photodiode, controllable signal amplification module, Pico digital oscilloscope and processor, wherein
The laser power supply is electrically connected with laser, with for power and be used for setting to laser setting parameter with
Make laser 1 it is anticipated that transmitting laser beam,
It is provided with spectroscope on laser emitting laser direction, mutually to hang down for the laser of laser emitting to be divided into
Straight the first light beam and the second light beam, the sea level that first light beam is used to be emitted directly toward extinction coefficient profile to be measured are non-
In even horizontal air, reflecting mirror is provided in the exit direction of second light beam, the reflecting mirror is used for the second light beam is anti-
It is incident upon in PIN photodiode, spectroscopical mirror surface and laser emitting laser angle at 45 °,
First channel of the PIN photodiode and Pico digital oscilloscope is electrically connected, the PIN photodiode
For converting the optical signal for entering itself to the first channel for being transmitted to Pico digital oscilloscope after electric signal,
The catadioptric astronomical telescope is used to collect the back scattered echo-signal of the non-homogeneous horizontal air in sea level,
The condenser lens and filter plate are successively set at the light exit for astronomical telescope of turning back, and the condenser lens is used
It being focused on filter plate in by atmospheric backscatter echo-signal, the filter plate is used to filter out stray light,
On filter plate outgoing light direction, the gate photomultiplier tube is used for light for the gate photomultiplier tube setting
Signal subsection is converted into electric signal, the first input of the output end connection controllable signal amplification module of the gate photomultiplier tube
End, with the electric signal transmission for obtaining optical signal conversion to controllable signal amplification module, controllable signal amplification module is used for
The electric signal of acquisition is amplified,
The output end of the controllable signal amplification module connects the second channel of the Pico digital oscilloscope, for inciting somebody to action
Amplified electric signal transmission to Pico digital oscilloscope,
The output end of the Pico digital oscilloscope connects processor, the Pico digital oscilloscope be used to input the
One, second channel signal, which is converted to after digital information, is delivered to processor to carry out follow-up data processing,
The processor output end connects the second input terminal and the gate photoelectricity of controllable signal amplification module simultaneously
The input terminal of multiplier tube, when the processor is also used to issue control signal to control the enabling delay of gate photomultiplier tube
Between, it is also used to adjust the enlargement ratio of controllable amplification module according to the enabling delay time of the photomultiplier tube.
Further, the condenser lens, the optical filter, the gate photomultiplier tube are connected into whole by connecting cylinder
Body, this is integrally attached at the light exit of the astronomical telescope of turning back,
The both ends of connection cylinder are arranged in the condenser lens and the gate photomultiplier tube, and the optical filter setting exists
The middle of the connection cylinder.
Further, the entrance pupil center of the optical axis of laser and catadioptric astronomical telescope is in sustained height in same level
On line.
Further, the optical axis of the optical axis of the laser and the catadioptric astronomical telescope has between in the horizontal direction
There is angle.
Further, having angle between the optical axis of the laser and the optical axis of the catadioptric astronomical telescope is 0.1
Between milliradian~10 milliradians.In practical projects, a movable cushion plate, the backing plate can be increased under astronomical telescope of turning back
The left and right deviation angle for adjusting astronomical telescope of turning back can be moved left and right.
Further, the laser is the pulse laser that launch wavelength is 532nm.
Further, the filter plate is the filter plate that center wavelength is 532nm.
Further, it can be used to measure the non-homogeneous horizontal air extinction coefficient in sea level in 0.5km~6km distance range
Profile.
Further, the astronomical telescope of turning back is that Maksutov-Cassegrain's formula is turned back astronomical telescope.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, it is following by that can obtain
The utility model has the advantages that
Contemplated above technical scheme through the invention, compared with prior art, due to using piecewise acquisition amplification letter
Number measurement method, can obtain and improve remote echo-signal signal-to-noise ratio, it is non-homogeneous horizontal big so as to be suitable for sea level
The measurement of gas extinction coefficient in the horizontal direction, and measurement range is considerably increased, improve the accuracy of measurement.
Detailed description of the invention
Fig. 1 is that the apparatus structure of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level in the embodiment of the present invention shows
It is intended to；
Fig. 2 is that the non-homogeneous horizontal air aerosol in sea level is segmented amplified scatter echo signal in the present invention；
Fig. 3 is that the device of that embodiment of the invention measurement obtains specific flow chart of data processing block diagram after data；
Fig. 4 is non-homogeneous horizontal air extinction coefficient profile on the sea level of acquisition of the embodiment of the present invention.
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which:
1- laser 2- laser power supply
3- turns back astronomical telescope 4- condenser lens
5- optical filter 6- gates photomultiplier tube
7- reflecting mirror 8-PIN photodiode
9- controllable signal amplification module 10-Pico digital oscilloscope
11- processor
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
The present invention devises a set of can be realized in 0.5km to 6km range according to the characteristic of ocean lower atmosphere layer aerosol
The device of the non-homogeneous horizontal air extinction coefficient profile measurement in sea level.
Fig. 1 is that the apparatus structure of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level in the embodiment of the present invention shows
It is intended to, as seen from the figure, the device for mainly including has laser 1, laser power supply 2,3 (specifically horse of astronomical telescope of turning back
Ke Sutuofu-Cassegrain's formula is turned back astronomical telescope), condenser lens 4, optical filter 5, gate photomultiplier tube 6 (band gate function
Can photomultiplier tube), spectroscope 7, PIN photodiode 8, controllable signal amplification module 9, Pico digital oscilloscope 10 and place
Manage device 11.
Wherein, the connection relationship of all parts and effect are as follows respectively: laser power supply 2 is electrically connected with laser 1, with
Parameter for setting to be powered and be arranged to laser 1 makes laser 1 it is anticipated that transmitting laser beam.It is emitted in laser 1
It is provided with spectroscope on laser direction, orthogonal first light beam and second are divided into the laser for laser 1 to be emitted
Light beam, first light beam are emitted directly toward in the non-homogeneous horizontal air in sea level of extinction coefficient profile to be measured, scatter,
Scatter light emission to all the winds.It is provided with reflecting mirror 7 in the exit direction of second light beam, the reflecting mirror 7 is used for the
Two light beams reflex in PIN photodiode 8.First channel phase of the PIN photodiode 8 and Pico digital oscilloscope 10
Electrical connection, into PIN photodiode 8 light be converted into be transmitted to after electric signal Pico digital oscilloscope 10 first letter
Road.Catadioptric astronomical telescope 3 is for collecting the back scattered echo-signal of the non-homogeneous horizontal air in sea level.Condenser lens 4 and filter
Wave plate 5 is successively set at the light exit for astronomical telescope 3 of turning back, and condenser lens 4 is used for atmospheric backscatter echo-signal
It focuses on filter plate 5, the filter plate 5 is for filtering out stray light.The setting of gate photomultiplier tube 6 goes out in filter plate 5
It penetrates on light direction, the light being emitted from filter plate is incident on the photosurface of gate photomultiplier tube 6, and gate photomultiplier tube 6 is used
Converting optical signal into electric signal in segmentation, (gate photomultiplier tube has gate control function.Gate the output end of photomultiplier tube 6
The first input end of controllable signal amplification module 9 is connected, with the electric signal transmission for obtaining optical signal conversion to controllable letter
Number amplification module 9, the electric signal that controllable signal amplification module 9 is used to obtain amplify, the output end of controllable signal amplification module 9
The second channel of the Pico digital oscilloscope 10 is connected, to be used for amplified electric signal transmission to Pico digital oscilloscope
10.The output end of Pico digital oscilloscope 10 connects processor 11, the Pico digital oscilloscope 10 be used to input first,
Second channel signal is converted to digital information and is delivered to processor 11 to carry out follow-up data processing.11 output end of processor
The second input terminal of controllable signal amplification module 9 and the input terminal of the gate photomultiplier tube 6, processor 11 are connected simultaneously
The control signal of sending controls the enlargement ratio of the enabling delay time and controllable amplification module 9 of gate photomultiplier tube 6 respectively.
In the present invention, using launch wavelength is the pulse laser of 532nm as light source transmitting unit, by by refraction-reflection type
The reception optical unit of astronomical telescope, optical filter and condenser lens composition receives atmospheric reflectance echo-signal, and by photoelectricity
Cell processing obtains electric signal, then is handled by data processing unit by electric signal is further, and it is non-that inverting obtains sea level
The extinction coefficient profile of even horizontal air.
In the present invention, the optical axis of the optical axis of laser 1 and catadioptric astronomical telescope 3 is each parallel to the sea level currently located.
There is angle between the optical axis of the laser 1 and the optical axis of the catadioptric astronomical telescope 3.The optical axis of the laser 1 and
Having angle between the optical axis of the catadioptric astronomical telescope 3 is between 0.1 milliradian~10 milliradians.Due to laser radar system
The transceiver module of system is not coaxial, this can generate one and atmospheric backscatter echo-signal detection blind area is not measured, so to set
The left and right deviation angle of the changeable astronomical telescope of turning back of meter is to reduce detection blind area.
The specific work process of apparatus of the present invention is as follows:
Firstly, from laser 1 to the transmitting beam of laser of spacious marine atmosphere level, the pulse energy of the laser beam is
50mJ, wavelength 532nm, the wavelength period most sensitive in human eye.
Then, due to being provided with a spectroscope before laser beam, light beam is divided into two bundles by spectroscope, a branch of direct incidence
Into the non-homogeneous horizontal air in sea level, another Shu Ze is incident in PIN photodiode using reflecting mirror.
On the one hand, the light beam being incident in PIN photodiode is trigger signal, which is turned by PIN photodiode
Chemical conversion electric signal is simultaneously input in the first channel of Pico digital oscilloscope.
On the other hand, due to being incident to during the laser beam of the non-homogeneous horizontal air in sea level transmits in an atmosphere
It can be scattered when encountering the particulate matter of atmospheric molecule and suspension in an atmosphere, the light of scattering along spreading out of from all directions, wherein one
Some scattered light is rear orientation light, is then collected rear orientation light by refraction-reflection type astronomical telescope, and catadioptric astronomical telescope is defeated
Optical signals by condenser lens focus to central wavelength be 532nm filter plate, then by filter plate filter off background stray light with
Reduce or even eliminate the influence to signal light.The emergent light projected from filter plate is collected by gate photomultiplier tube.
Then, processor issues the enabling delay time of control signal control gate photomultiplier tube, and piecewise receives light
Signal, gate photomultiplier tube has been at standby mode, and when receiving optical signal, gate photomultiplier tube work will
Optical signal is converted to electric signal and is delivered to controllable signal amplification module.
Followed by the control signal that controllable signal amplification module is issued by processor is controlled to pass to different split times
The electric signal entered does the enhanced processing of different enlargement ratios, by the second of amplified electric signal input value Pico digital oscilloscope
Channel.The voltage signal of two channels is converted to digital information by analog converter by Pico digital oscilloscope respectively, is laid equal stress on
Structure waveform shows the voltage-vs-time relation curve in two channels on a processor.Wherein, the signal of the first channel is oscillograph note
The trigger signal of data is recorded, the signal of second channel is the echo-signal of the non-homogeneous horizontal air back scattering in sea level, it is
The relation curve of echo voltage and time.
Finally, storing recording voltage-time relation data by processor and passing through Matlab or other mapping softwares pair
The data inverting that is for further processing obtains Horizontal extinction coefficient profile.
Relative to the system of existing measurement atmospheric horizontal visibility, theing improvement is that for the present apparatus is used with door
The photomultiplier tube of control function carrys out piecewise acquisition atmospheric backscatter echo-signal as detector, issues gate letter by computer
Number control gate photomultiplier tube opens the door delay time to reach at detector piecewise acquisition different distance scattering fever echo letter
Number purpose.The signal of piecewise acquisition is delivered in controllable amplification module, is believed by the control of processor (or computer)
Number control controllable signal amplification module does the enhanced processing of different multiplying to different sections of signal.
Specifically, the scatter echo signal enlargement ratio of short distance is set as smaller value, to prevent out, existing signal saturation is cut
Push up phenomenon；Remote scatter echo signal enlargement ratio is set as the larger value, preferably to extract the echo of distant location
Signal increases the signal-to-noise ratio of the noises such as itself and system thermal noise.It will be segmented amplified signal input Pico digital oscilloscope again,
Digital information is converted to by oscillograph and stores display data.
The scatter echo signal obtained after segmentation amplification is as shown in Fig. 2, is controlled by computer or processor
It is for example six times that photomultiplier tube, which opens the door and detects, and control is opened the door delay time every time respectively, is segmented record scatter echo signal.With
This simultaneously, computer or processor control amplification module carry out the amplification of different multiplying to six segment signals, that is, see acquisition as attached
Scatter echo signal graph is amplified in segmentation shown in Fig. 2.
In Practical Project practice, then further inversion procedure is done to the echo-signal, Slope Method is replaced by fernald method
Extinction coefficient profile in inverting horizontal direction.Fernald method is to send out laser beam atmospheric molecule and suspended particulate substance
The influence of raw scattering phenomenon distinguishes, and assumes that particulate matter delustring Back-scattering ratio is constant, solves Mie scattering on this basis
Laser radar equation is to obtain extinction coefficient.
Fig. 3 is that the device of that embodiment of the invention measurement obtains specific flow chart of data processing block diagram after data, as seen from the figure, first
First, the different enlargement ratio values being segmented using for example six are normalized whole curve as parameter；Then to signal
Noise reduction process is carried out to reduce influence of the noise to inversion result, improves signal-to-noise ratio, Practical Project can for example use in practicing
Wavelet Algorithm, according to test of many times, the wavelet basis for choosing ' db4 ' as wavelet transformation carries out soft-threshold processing；It takes again most
Several kilometers of data afterwards accurately estimate Aerosol Extinction boundary value by bi-component fitting process；Using the extinction coefficient as
The initial data of fernald algorithm seeks corresponding extinction coefficient at different distance to short distance recurrence one by one, and makes distance
The atmospheric extinction coefficient profile in horizontal direction is obtained with extinction coefficient relation curve.
Fig. 4 is non-homogeneous horizontal air extinction coefficient profile on the sea level of acquisition of the embodiment of the present invention, and attached drawing 4 is this hair
It is bright to be installed on July 15,29 days to 2016 June in 2016 in yellow Bohai Offshore progress marine atmosphere extinction coefficient observation experiment
When the sea level that acquires on non-homogeneous horizontal air extinction coefficient profile.It can be seen that atmosphere disappears in the horizontal direction by the figure
Backscatter extinction logarithmic ratio has significant change, this is consistent with actual conditions.
The device of the invention can by gate photomultiplier tube (piecewise acquisition echo-signal, and to different segmentations work not
Same multiplying enhanced processing, so as to measure the non-homogeneous horizontal air Aerosol Extinction in remote sea level.
Present invention seek to address that original scheme medium and long distance backscattering echo Signal-to-Noise is low, measurement of extinction coefficient away from
From small problem.
Generally speaking, apparatus of the present invention can accurately obtain the distribution situation of extinction coefficient, energy when this is navigated by water for distinguishing
The variation of degree of opinion provides the data guidance for the reference value having very much.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of device for measuring the non-homogeneous horizontal air Aerosol Extinction in sea level, which is characterized in that it includes laser
Device (1), laser power supply (2), astronomical telescope of turning back (3), condenser lens (4), optical filter (5), gate photomultiplier tube
(6), reflecting mirror (7), PIN photodiode (8), controllable signal amplification module (9), Pico digital oscilloscope (10) and processor
(11), wherein
The laser power supply (2) is electrically connected with laser (1), for powering to laser (1) and for setting to be arranged
Parameter so that laser (1) it is anticipated that transmitting laser beam,
It is provided with spectroscope on laser (1) shoot laser direction, for the laser that laser (1) is emitted to be divided into mutually
Vertical the first light beam and the second light beam, the sea level that first light beam is used to be emitted directly toward extinction coefficient profile to be measured are non-
It in even level's atmosphere, is provided in the exit direction of second light beam reflecting mirror (7), the reflecting mirror (7) is used for the
Two light beams reflex in PIN photodiode (8),
Spectroscopical mirror surface and laser emitting laser angle at 45 °,
The PIN photodiode (8) and the first channel of Pico digital oscilloscope (10) are electrically connected, the PIN photoelectricity two
Pole pipe (8) is used to convert the optical signal for entering itself in the first letter for being transmitted to Pico digital oscilloscope (10) after electric signal
Road,
The astronomical telescope of turning back (3) is used to collect the back scattered echo-signal of the non-homogeneous horizontal air in sea level,
The condenser lens (4) and filter plate (5) are successively set at the light exit of astronomical telescope of turning back (3), the focusing
For lens (4) for focusing on filter plate (5) atmospheric backscatter echo-signal, the filter plate (5) is spuious for filtering out
Light,
On filter plate (5) outgoing light direction, the gate photomultiplier tube (6) is used for gate photomultiplier tube (6) setting
In converting electric signal for optical signal segmentation, the output end of gate photomultiplier tube (6) connects controllable signal amplification module
(9) first input end, with the electric signal transmission for obtaining optical signal conversion to controllable signal amplification module (9), controllably
The electric signal amplification that signal amplification module (9) is used to obtain,
The output end of the controllable signal amplification module (9) connects the second channel of the Pico digital oscilloscope (10), with
In by amplified electric signal transmission to Pico digital oscilloscope (10),
The output end of the Pico digital oscilloscope (10) connects processor (11), and the Pico digital oscilloscope (10) is used for will
First, second channel signal of input, which is converted to after digital information, is delivered to processor (11) to carry out follow-up data processing,
Processor (11) output end connects the second input terminal and the gate light of controllable signal amplification module (9) simultaneously
The input terminal of electric multiplier tube (6), the processor (11) are also used to issue control signal to control gate photomultiplier tube (6)
It opens the door delay time, is also used to adjust putting for controllable amplification module (9) according to the enabling delay time of the photomultiplier tube (6)
Big multiplying power.
2. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
Connected in, the condenser lens (4), the optical filter (5), the gate photomultiplier tube (6) by connecting cylinder it is integral, should
It is integrally attached at the light exit of astronomical telescope (3) of turning back,
The both ends of connection cylinder are arranged in the condenser lens 4 and gate photomultiplier tube (6), and the optical filter setting exists
The middle of the connection cylinder.
3. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
In the entrance pupil center of the height of laser optical axis and astronomical telescope of turning back is in the same horizontal line.
4. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
In with angle between the optical axis of the laser (1) and the optical axis of the astronomical telescope of turning back (3).
5. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as claimed in claim 4
In, between the optical axis of the laser (1) and the optical axis of the astronomical telescope of turning back (3) have angle be 0.1 milliradian~
Between 10 milliradians.
6. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
In the laser is the pulse laser that launch wavelength is 532nm.
7. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
In the filter plate is the filter plate that center wavelength is 532nm.
8. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
In can be used to measure the non-homogeneous horizontal air extinction coefficient profile in sea level in 0.5km~6km distance range.
9. the device of the measurement non-homogeneous horizontal air Aerosol Extinction in sea level, feature exist as described in claim 1
It is that Maksutov-Cassegrain's formula is turned back astronomical telescope in, the astronomical telescope of turning back (3).
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| CN110109149B (en) * | 2019-05-08 | 2022-11-25 | 南京信息工程大学 | Laser radar low-layer extinction coefficient profile correction method |
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