CN104865224B - For point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern - Google Patents
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Abstract
The present invention relates to be used for point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern, belong to polarisation transfer field of detecting.Including emission system, smoky environment analog systemss, beam splitting system, reception system, computer processing system, occur the unstable phenomenons such as sedimentation in testing for aerosol gases medium, laboratory operating procedures are reduced as far as possible, ensure four tunnel reception systems while receiving detection, the method of testing that 16 kinds of existing minimal action are combined, four operations are reduced to, quick, the accurate validation of 16 scattering patterns in the Muller matrix obtained to Monte Carlo simulation is realized.The present invention can be according to actual test needs, select the smog medium of the difference test condition such as corresponding smog particle diameter, humidity, temperature, concentration, and be accustomed to according to the calculating of operator, adjust the compound mode of linear polarizer and quarter-wave plate in emission system and reception system, it is easy to operate, be easily achieved.
Description
Technical field
The present invention relates to be used for point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern, belong to polarization
Transmission field of detecting.
Background technology
The increasingly serious phenomenon of the caused haze weather of current municipal pollution so that absorption of some media to light in environment
Attenuation is produced with scattering, it is in order to study the mechanism of photon and particle in smog medium, special using covering to a large amount of photons
The computer simulation method of Carlow, obtains the simulation pattern of 16 elements in smoky environment Muller matrix.The analogy method and its
He compares method, little, easy to operate with condition limitations affect, the advantages of phantom error is little.
In order to verify the correctness of simulation result, scattering pattern is obtained using actual experimental technique, is contrasted.Due to
16 scattering patterns in needing to Muller matrix are verified successively, then at least need 16 kinds of combinations could abundant table in testing
The each element up in Muller matrix.Hielscher and the National University of Defense technology are respectively adopted 49 kinds and 36 kinds combinations and complete anti-to liquid
The backscattering pattern test penetrated, it is inclined that Fujian Normal University is adjusted to level, vertical ,+45 ° of lines respectively with polarizer slice and checking bias slice
With dextrorotation justify folk prescription to 16 kinds of combinations obtain fluid sample Muller matrix pattern, save substantial amounts of experimentation.But in reality
Asynchronism in testing, due to adjusting impact to result of detection accuracy and record each time so that certainty of measurement declines is difficult
To meet the requirement high to the accuracy of computer artificial result checking.And existing method of testing is to stable liquid mostly
The measurement of scattering propertiess, the phenomenon unstable for the test environment in aerosol gases environment caused by smoke particle is settled
Do not consider.
It can be seen that the verification method complex operation of existing medium scatters Muller matrix pattern, accuracy is low, and tens of groups loaded down with trivial details
Experimental implementation process be not particularly suited for smog medium it is unstable the characteristics of, then KPT Scatter characteristic Muller square in aerosol gases environment
The checking of battle array is still urgently to be resolved hurrily.
The content of the invention
In order to be adapted to smog medium feature, research operates the higher scattering propertiess Muller matrix of easier, measuring accuracy
Verification method, the present invention proposes point amplitude type measuring method for smog medium scatters characteristic Muller matrix pattern.
For point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern, including emission system, smog
Environmental simulation system, beam splitting system, reception system and computer processing system, emission system, smoky environment analog systemss, light splitting
System, reception system and computer processing system are successively set in the light path of beam Propagation；
The emission system includes laser instrument, collimating and beam expanding system, optical filter, linear polarizer I and quarter-wave plate I,
And on the basis of horizontal direction axle, linear polarizer I and I angle of regulation range of quarter-wave plate are 0 °～360 ° or remove；
The beam splitting system includes unpolarized Amici prism I, unpolarized Amici prism II and unpolarized Amici prism III, and
The ratio of the transmission potential and reflected energy of unpolarized Amici prism I, unpolarized Amici prism II and unpolarized Amici prism III is equal
For 1:1；
The reception system includes receiving unit I, receiving unit II, receiving unit III and receiving unit IV；The reception
Unit I includes quarter-wave plate II, linear polarizer II and detector I；The receiving unit II include quarter-wave plate III,
Linear polarizer III and detector II；The receiving unit III includes quarter-wave plate IV, linear polarizer IV and detector III；Institute
Stating receiving unit IV includes quarter-wave plate V, linear polarizer V and detector IV；The axle on the basis of horizontal direction, four/
One wave plate II, linear polarizer II, quarter-wave plate III, linear polarizer III, quarter-wave plate IV, IV, four points of linear polarizer
One of the angle of regulation range of wave plate V and linear polarizer V be 0 °～360 ° or remove；
The computer processing system by data wire respectively with detector I, detector II, detector III and detector IV
Connect, and computer processing system is connected with smoky environment analog systemss；
It is characterized in that：
Realize step：
Step one, unlatching laser instrument, transmitting light beam incide optical filter through collimating and beam expanding system and are filtered, acquisition
Collimator and extender directional light sequentially passes through linear polarizer I and quarter-wave plate I, by removing or adjusting linear polarizer I and four points
One of the angle of wave plate I be polarized, the axle on the basis of horizontal direction, the angular adjustment of linear polarizer I and quarter-wave plate I
Scope is 0 °～360 °；
Step 2, the outgoing beam that step one is obtained is incided smoky environment analog systemss, light beam Jing smoky environment moulds
Plan system incides beam splitting system, and by the putting position for adjusting three unpolarized Amici prisms in beam splitting system, light beam Jing divides
Photosystem is divided into four tunnels, and per the light intensity all same of road light beam；
The four road light beams that step 3, step 2 are obtained are injected into four receiving units simultaneously；Incident beam is in four light paths
On sequentially pass through outgoing after quarter-wave plate and linear polarizer, four detectors detect the light of four road outgoing beams simultaneously
By force, and by detection information send computer processing system to, computer processing system carries out pattern process, obtains light intensity pattern；
Step 4, complete above-mentioned steps after, operator's Jing computers processing system control smoky environment analog systemss in
Smoky environment, and the particle radii parameter of smoky environment in smoky environment analog systemss, refraction are monitored by computer processing system
Rate parameter, humidity parameter, concentration parameter, temperature parameter, Jing computer processing system transceiver systems now launch light beam
Four groups of light intensity patterns, and record the smoky environment in smoky environment analog systemss；
Step 5, the putting position for adjusting linear polarizer I and quarter-wave plate I in emission system, with horizontal direction be
The angle of regulation range of reference axis, linear polarizer I and quarter-wave plate I is 0 °～360 °；Repeat step four, and keep cigarette
In mist analog systemss, smoky environment parameter is identical with the parameter recorded in step 4；
Step 6, step 5 are repeated twice, 16 groups of light intensity patterns are more than obtained, by computer processing system
Obtain the scattering pattern of 16 elements in smog medium scatters characteristic Muller matrix.
Tetra- road receiving unit of step 3 Zhong is adjusted by following two methods respectively：
1) quarter-wave plate II in the receiving unit I, linear polarizer II are removed, and are detected without polarisation；The reception
Quarter-wave plate III in unit II is removed, and linear polarizer III is adjusted to horizontal direction or vertical direction, detection level or
Orthogonal polarized light；Quarter-wave plate IV in the receiving unit III is removed, and linear polarizer IV is adjusted to and horizontal direction
Into+45 ° or -45 ° of direction, the line polarized light in+45 ° or -45 ° directions is detected；Quarter-wave in the receiving unit IV
Piece V is adjusted to straight at+45 ° or -45 ° of directions, and linear polarizer V is adjusted to horizontal direction, detection dextrorotation or left-handed inclined
Shake light；
2) the analyzing state in the receiving unit of four road is respectively detection level polarized light, orthogonal polarized light ,+45 ° of sides
To line polarized light, the line polarized light in -45 ° of directions, any four in right-handed polarized light and left-hand polarization light, but four to be guaranteed
Possess in the receiving unit of road to horizontally or vertically polarized light, the line polarized light in+45 ° or -45 ° directions and dextrorotation or left-hand polarization light
Detection.
1st, point amplitude type measurement side for smog medium scatters characteristic Muller matrix pattern according to claim 1
Method, is characterized in that：Linear polarizer I and quarter-wave plate I in emission system in the step one is adjusted four times altogether, is produced
Four groups of different polarisations, and guarantee that four groups of polarization states for playing polarisations are identical with analyzing state in four road receiving units.
The detector I, detector II, detector III and detector IV are CCD camera.
By above-mentioned design, the present invention can bring following beneficial effect：The present invention exists for aerosol gases medium
Unstable phenomenon in test, reduces laboratory operating procedures as far as possible, using a point amplitude type smog medium scatters characteristic Muller matrix
The verification method of pattern, the method for testing that 16 kinds of existing minimal action are combined are reduced to four operations, it is ensured that four tunnels connect
Receipts system receives detection simultaneously, and reception system once it is determined that, without the need for adjust again, at emission system end, adjust each time and send out
During irradiating light beam, monitor again each parameter in smog medium, it is ensured that experimental situation is identical, realize in smog medium to Monte Carlo
Quick, the accurate validation of 16 scattering patterns in the Muller matrix that emulation is obtained.The present invention can be selected according to actual test needs
The smog medium of the difference test condition such as corresponding smog particle diameter, humidity, temperature, concentration is selected, and is accustomed to according to the calculating of operator,
Adjust the compound mode of the linear polarizer in emission system and reception system and quarter-wave plate, it is easy to operate, be easily achieved.
Description of the drawings
Below in conjunction with description of the drawings, the invention will be further described with specific embodiment：
Fig. 1 present invention is for the system knot in point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern
Structure schematic diagram.
In figure：1- emission systems, 101- laser instrument, 102- collimating and beam expanding systems, 103- optical filters, 104- linear polarizers I,
105- quarter-wave plates I, 2- smoky environment analog systemss, 3- beam splitting systems, 401- receiving units I, 4010- quarter-waves
Piece II, 4011- linear polarizers II, 4012- detectors I, 402- receiving units II, 4020- quarter-wave plates III, 4021- lines
Polaroid III, 4022- detectors II, 403- receiving units III, 4030- quarter-wave plates IV, 4031- linear polarizers IV,
4032- detectors III；404- receiving units IV, 4040- quarter-wave plates V, 4041- linear polarizers V, 4042- detectors
Ⅳ；5- computer processing systems.
Specific embodiment
As illustrated, for point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern, bar needed for which
Part and realize that step is as follows：
Required condition：
Including emission system 1, smoky environment analog systemss 2, beam splitting system 3, reception system, computer processing system 5；
Described emission system 1, by laser instrument 101, collimating and beam expanding system 102, optical filter 103, I 104 He of linear polarizer
Quarter-wave plate I 105 is constituted, and the axle on the basis of horizontal direction, I angular adjustment model of linear polarizer I and quarter-wave plate
Enclose and be 0 °～360 ° or remove, for producing the polarized light of different conditions；
Described smoky environment analog systemss 2, can produce various different smog such as water smoke, mist of oil and burning type flue dust and be situated between
Matter, and be connected with computer processing system 5, computer processing system 5 is used for controlling and monitoring smoky environment；
Described beam splitting system 3 is 1 by three pieces of transmissions and reflected energy ratio:It is 1 unpolarized Amici prism I 301, unpolarized
Amici prism II 302, unpolarized Amici prism III 303 are constituted, and beam splitting system 3 is for being divided into four beams by light beam, while carrying out
Detection, three unpolarized Amici prisms do not change the polarization state of polarized light, and light beam is only divided into two beams of transmission and reflection,
And intensity halves；
Described reception system is divided into four tunnels, including receiving unit I 401, receiving unit II 402, receiving unit III 403
With receiving unit IV 404, and element is identical, including quarter-wave plate, linear polarizer and detector, wherein four/
One wave plate and linear polarizer can adjust angle or remove, and for analyzing, detector is CCD camera, for detecting this four tunnel
The light intensity pattern that light beam is produced；
The computer processing system 5 is by the detector and smoky environment simulation system in data wire and four tunnel reception systems
System 2 is connected.
Preferred embodiment：
Step one, unlatching laser instrument 101, transmitting light beam incides optical filter 103 through collimating and beam expanding system 102 to be filtered
Light, removes polaroid 104 and quarter-wave plate 105, produces without polarisation, incides smoky environment analog systemss 2, light beam Jing cigarettes
Mist environmental simulation system incides beam splitting system 3, and light beam Jing beam splitting systems 3 are divided into four tunnels, and homogeneous per the light intensity of road light beam
Together；
Step 2, the light beam that step one is obtained is incided into reception system；The quantity of the reception system with get light beam
Quantity it is identical, the quantity of reception system is four, respectively receiving unit I 401, receiving unit II 402, receiving unit III
403 and receiving unit IV 404, the receiving unit I 401 includes quarter-wave plate II 4010, linear polarizer II 4011 and visits
Survey device I 4012；The receiving unit II 402 includes quarter-wave plate III 4020, linear polarizer III 4021 and detector II
4022；The receiving unit III 403 includes quarter-wave plate IV 4030, linear polarizer IV 4031 and detector III 4032；Institute
Stating receiving unit IV 404 includes quarter-wave plate V 4040, linear polarizer V 4041 and detector IV 4042；Per road incident illumination
Beam sequentially passes through outgoing after quarter-wave plate and linear polarizer, and detector detects the light intensity of outgoing beam, and detector will be visited
Measurement information sends computer processing system 5 to, and computer processing system 5 carries out pattern process, obtains light intensity pattern；
Step 3, the quarter-wave plate II 4010 by receiving unit I 401 described in step 2, linear polarizer II
4011 remove, and detect without polarisation；Quarter-wave plate III 4020 in receiving unit II 402 described in step 2 is removed, and
Linear polarizer III 4021 is adjusted to horizontal direction, detection level polarized light；By four in receiving unit III 403 described in step 2
/ mono- wave plate IV 4030 is removed, and linear polarizer IV 4031 is adjusted to the direction from the horizontal by+45 °, detects+45 ° of sides
To line polarized light；By the quarter-wave plate V 4040 in receiving unit IV 404 described in step 2 be adjusted to straight at+
45 ° of directions, and linear polarizer V 4041 is adjusted to horizontal direction, detects right-handed polarized light；
Step 4, through the step 3 process after, operator's Jing computers processing system 5 control smoky environment simulation
Smoky environment in system, and the parameters such as the particle radii in smoky environment, humidity, concentration are monitored, connect by computer processing system 5
Four groups of light intensity patterns when transmitting terminal is non-polarized light are received, and the smoke particle recorded in now smoky environment analog systemss 2 is each
Parameter；
Step 5, linear polarizer I 104 will be placed after the optical filter 103 described in step one, and be adjusted to horizontal direction,
It is polarized as horizontal polarization light；Regulating calculation machine processing system 5, keeps each parameter of smoky environment and step in smoke simulation system 2
The parameter recorded in four is identical, obtains four groups of light intensity patterns when now transmitting terminal is horizontal polarization light；
Step 6, linear polarizer I 104 described in step one is adjusted to straight at+45 ° of directions, is polarized as+45 ° of sides
To line polarized light；Regulating calculation machine processing system 5, in holding smoke simulation system 2 in each parameter of smoky environment and step 4
The parameter of record is identical, obtains four groups of light intensity patterns when now transmitting terminal is+45 ° of polarized light；
Step 7, by linear polarizer described in step one I 104 keep horizontal direction, behind place quarter-wave plate I
105, quarter-wave plate I 105 is adjusted to straight at+45 ° of directions, is polarized as right-handed polarized light, regulating calculation machine processing system
System 5, in keeping smoke simulation system 2, each parameter of smoky environment is identical with the parameter recorded in step 4, obtains now transmitting terminal
For dextropolarization light when four groups of light intensity patterns；
16 groups of light intensity patterns that step 8, Jing step 4～step 7 is obtained, 16 groups of light intensity patterns are respectively I00~
I33, the I00～I33Method for expressing as shown in table 1, and smog medium scatters characteristic Muller matrix is calculated successively by formula (1)
In 16 elements scattering pattern.
Table 1I00～I33Method for expressing
S′11=I00, S '12=I10-I00, S '13=I20-I00, S '14=I30-I00,
S′21=I01-I00, S '22=I11-I01-I10+I00, S '23=I21-I01-I20+I00, S '24=I31-I01-I30+I00
S′31=I02-I00, S '32=I12-I02-I10+I00, S '33=I22-I02-I20+I00, S '34=I32-I02-I30+I00
S′41=I03-I00, S '42=I13-I03-I10+I00, S '43=I23-I03-I20+I00, S '44=I33-I03-I30+I00 (1)
The measurement of smog medium scatters characteristic Muller matrix pattern can be completed using above step.
Above-described embodiment is only the illustrative method of the present invention and beneficial effect, not for the restriction present invention.Appoint
What is familiar with the personage of the method can be modified to above-described embodiment under the spirit and the scope without prejudice to the present invention.Therefore
The scope of the present invention, should be as listed by claim.
Claims (4)
1. point amplitude type measuring method of smog medium scatters characteristic Muller matrix pattern, including emission system (1), smog are used for
Environmental simulation system (2), beam splitting system (3), reception system and computer processing system (5), emission system (1), smoky environment
Analog systemss (2), beam splitting system (3), reception system and computer processing system (5) are successively set on the light path of beam Propagation
On；
The emission system (1) includes laser instrument (101), collimating and beam expanding system (102), optical filter (103), linear polarizer I
And quarter-wave plate I (105), and the axle on the basis of horizontal direction, linear polarizer I (104) and quarter-wave plate I (104)
(105) angle of regulation range is 0 °～360 ° or removes；
The beam splitting system (3) includes unpolarized Amici prism I (301), unpolarized Amici prism II (302) and unpolarized light splitting
Prism III (303), and unpolarized Amici prism I (301), unpolarized Amici prism II (302) and unpolarized Amici prism III
(303) transmission potential is 1 with the ratio of reflected energy:1；
The reception system includes receiving unit I (401), receiving unit II (402), receiving unit III (403) and receiving unit
Ⅳ(404)；The receiving unit I (401) includes quarter-wave plate II (4010), linear polarizer II (4011) and detector I
(4012)；The receiving unit II (402) includes quarter-wave plate III (4020), linear polarizer III (4021) and detector II
(4022)；The receiving unit III (403) includes quarter-wave plate IV (4030), linear polarizer IV (4031) and detector III
(4032)；The receiving unit IV (404) includes quarter-wave plate V (4040), linear polarizer V (4041) and detector IV
(4042)；The axle on the basis of horizontal direction, quarter-wave plate II (4010), linear polarizer II (4011), quarter-wave plate
III (4020), linear polarizer III (4021), quarter-wave plate IV (4030), linear polarizer IV (4031), quarter-wave plate
V (4040) and the angle of regulation range of linear polarizer V (4041) be 0 °～360 ° or remove；
The computer processing system (5) by data wire respectively with detector I (4012), detector II (4022), detector
III (4032) and detector IV (4042) connect, and computer processing system (5) is connected with smoky environment analog systemss (2)；
It is characterized in that：
Realize step：
Step one, unlatching laser instrument (101), transmitting light beam incides optical filter (103) through collimating and beam expanding system (102) to be carried out
Filter, the collimator and extender directional light of acquisition sequentially passes through linear polarizer I (104) and quarter-wave plate I (105), by removing
Or the angle of regulation linear polarizer I (104) and quarter-wave plate I (105) is polarized, the axle on the basis of horizontal direction, line
The angle of regulation range of polaroid I (104) and quarter-wave plate I (105) is 0 °～360 °；
Step 2, the outgoing beam that step one is obtained is incided smoky environment analog systemss (2), the simulation of light beam Jing smoky environments
System (2) incides beam splitting system (3), by the putting position for adjusting three unpolarized Amici prisms in beam splitting system (3), light
Beam Jing beam splitting systems (3) is divided into four tunnels, and per the light intensity all same of road light beam；
The four road light beams that step 3, step 2 are obtained are injected into four receiving units simultaneously；Incident beam is equal in four light paths
Outgoing after quarter-wave plate and linear polarizer is sequentially passed through, four detectors detect the light intensity of four road outgoing beams simultaneously,
And sending detection information to computer processing system (5), computer processing system (5) carries out pattern process, obtains plot of light intensity
Sample；
Step 4, complete above-mentioned steps after, operator Jing computer processing systems (5) control smoky environment analog systemss in cigarette
Mist environment, and by computer processing system (5) monitor the particle radii parameter of smoky environment in smoky environment analog systemss (2),
Refractive index parameter, humidity parameter, concentration parameter, temperature parameter, Jing computer processing system (5) transceiver systems are now launched
Four groups of light intensity patterns of light beam, and record the smoky environment in smoky environment analog systemss (2)；
Step 5, the putting position for adjusting linear polarizer I (104) and quarter-wave plate I (105) in emission system, with level
The angle of regulation range of axle on the basis of direction, linear polarizer I (104) and quarter-wave plate I (105) is 0 °～360 °；Weight
Multiple step 4, and smoky environment parameter is identical with the parameter recorded in step 4 in keeping smoke simulation system (2)；
Step 6, step 5 are repeated twice, and 16 groups of light intensity patterns are more than obtained, by computer processing system (5)
Obtain the scattering pattern of 16 elements in smog medium scatters characteristic Muller matrix.
2. point amplitude type measuring method for smog medium scatters characteristic Muller matrix pattern according to claim 1,
It is characterized in that：Tetra- road receiving unit of step 3 Zhong is adjusted by following two methods respectively：
1) quarter-wave plate II (4010), linear polarizer II in the receiving unit I (401) is removed (4011), detects nothing
Polarisation；Quarter-wave plate III (4020) in the receiving unit II (402) is removed, and linear polarizer III (4021) is adjusted to
Horizontal direction or vertical direction, detection level or orthogonal polarized light；Quarter-wave plate IV in the receiving unit III (403)
(4030) remove, and linear polarizer IV (4031) be adjusted to the direction from the horizontal by+45 ° or -45 ° ,+45 ° of detection or -
The line polarized light in 45 ° of directions；Quarter-wave plate V (4040) in the receiving unit IV (404) be adjusted to straight at+
45 ° or -45 ° of directions, and linear polarizer V (4041) is adjusted to horizontal direction, detection dextrorotation or left-hand polarization light；
2) analyzing state in the receiving unit of four road is respectively detection level polarized light, orthogonal polarized light ,+45 ° of directions
Any four in line polarized light, the line polarized light in -45 ° of directions, right-handed polarized light and left-hand polarization light, but to guarantee that four tunnels connect
Possess to horizontally or vertically polarized light, the line polarized light in+45 ° or -45 ° directions and dextrorotation or the inspection of left-hand polarization light in receiving unit
Survey.
3. point amplitude type measuring method for smog medium scatters characteristic Muller matrix pattern according to claim 1,
It is characterized in that：Linear polarizer I (104) and quarter-wave plate I (105) in emission system in the step one adjusts four altogether
It is secondary, four groups of different polarisations are produced, and guarantees that four groups of polarization states for playing polarisations are identical with analyzing state in four road receiving units.
4. point amplitude type measuring method for smog medium scatters characteristic Muller matrix pattern according to claim 1,
It is characterized in that：The detector I (4012), detector II (4022), detector III (4032) and detector IV (4042) are
CCD camera.
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| CN102226718A (en) * | 2011-03-31 | 2011-10-26 | 长春理工大学 | Sound light polarization spectrum camera |
| CN102507399A (en) * | 2011-10-26 | 2012-06-20 | 中国科学技术大学 | Method and device for measuring particle size of soot particle |
| CN104089651A (en) * | 2014-07-06 | 2014-10-08 | 长春理工大学 | Smog environment simulation device for testing polarization laser transmission features |
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2015
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