CN110927071A - Method for verifying polarization transmission characteristic test and simulation of sea fog environment under influence of illumination - Google Patents
Method for verifying polarization transmission characteristic test and simulation of sea fog environment under influence of illumination Download PDFInfo
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Abstract
The invention relates to a verification method for testing and simulating sea fog environment polarization transmission characteristics under the influence of illumination, which belongs to the field of polarization transmission detection, and aims at an atmosphere-sea fog complex marine environment, a simplified atmosphere and sea fog double-layer structure is utilized to simulate the complex marine environment, Monte Carlo and RT3 programs are adopted to simulate the sea fog environment polarization transmission process and the downlink radiation polarization distribution under the influence of sunlight, so that the experimental verification and simulation that the sea fog environment passes through the atmosphere and sea fog multilayer marine environment active polarization transmission characteristics in the vertical direction under the conditions of no illumination influence and illumination influence can be respectively realized, the problems of changeable sea fog environment and overhigh cost of the experimental process when outdoor simulation verification is carried out are solved, the accuracy of experimental test results is improved, and the accuracy can be verified by theory and experiment.
Description
Technical Field
The invention belongs to the field of polarization transmission detection, and particularly relates to a method for verifying polarization transmission characteristic test and simulation of a sea fog environment under the influence of illumination.
Background
Mist is an aerosol system consisting of slowly settling water droplets or ice crystal particles suspended in near-surface air, and sea fog is an aerosol that is formed and maintained under specific marine environmental and weather conditions. Due to the existence of the atmosphere-sea fog multilayer medium environment, unpolarized natural light has polarization characteristics after being scattered by atmosphere molecules and sea fog particles, so that active polarization detection in the vertical direction is influenced. Therefore, the research on the active polarization characteristic of the complex marine environment under the influence of illumination has important significance in the fields of transportation, sea surface detection, marine development and the like.
At present, aiming at the test research of the polarization transmission characteristic in the vertical direction, most researches on the all-sky polarization mode in the atmospheric medium environment, and the RT3 method based on the vector radiation transmission equation, which is proposed by Evansk.F. and the like, is one of the most widely used methods for calculating the transmission characteristic of the non-uniform multi-layer medium. By adopting the method, Zhang Yingyi et al at Beijing aerospace university solve the Stokes parameters of the simplified double-layer atmospheric light waves, and respectively simulate all-sky polarization information under the conditions of sunny days, cloudy days and cloudy days. The radiation transmission model based on the double addition method is adopted by the people like the Kingunnxia of Beijing university of justice to research the sky polarization model under various weather conditions from the visible wave band to the near infrared wave band, and the simulation result is consistent with the actual measurement result in 80% of the area through the actual measurement verification. The above methods are limited to simulating transmission of atmospheric environment polarized in the vertical direction. For the active laser emission situation, the research on the polarization transmission characteristics in the vertical direction under the atmosphere and sea fog multi-layer marine environment is not reported, and when simulation verification is carried out outdoors, the sea fog environment is variable, and the vertical direction test needs test guarantees such as airborne test and ship-borne test, so that the cost of the test process is too high, and the difficulty of experimental verification is increased.
Therefore, aiming at the research on the active polarization transmission characteristic under the influence of the sunlight of the complex marine environment in vertical observation, a verification method for the polarization transmission characteristic test and simulation of the marine fog environment under the influence of the sunlight is urgently needed.
Disclosure of Invention
The invention aims to provide a method for testing and simulating the polarization transmission characteristic of sea fog environment under the influence of illumination, which aims to research the polarization transmission characteristic of the sea fog environment in the vertical direction under the influence of solar illumination, verify the polarization transmission characteristic of the sea fog environment under the influence of the illumination and have higher test accuracy under the experimental test and the computer simulation method.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for verifying polarization transmission characteristic test and simulation of sea fog environment under the influence of illumination is characterized by comprising the following steps: the system adopted by the method comprises a multilayer sea fog environment simulation system, a solar simulation system, a polarization transmitting system, a polarization receiving system, a sea fog particle generator, an atmospheric aerosol generator, a laser and an optical power meter,
the multi-layer sea fog environment simulation system is of a hemispherical closed structure, a second glass window is arranged in the center of the top of the multi-layer sea fog environment simulation system, a first glass window is arranged in the center of the bottom of the multi-layer sea fog environment simulation system, and a glass interlayer is arranged in the multi-layer sea fog environment simulation system; the glass interlayer divides the multi-layer sea fog environment simulation system into an upper layer and a lower layer, the upper layer is an atmospheric environment simulation layer, the lower layer is a sea fog environment simulation layer, and the edge of the upper surface of the glass interlayer is fixed with a circular guide rail which is coaxial with the glass interlayer; the circular guide rail is provided with an arc guide rail in sliding fit with the circular guide rail; the arc-shaped guide rail is vertically arranged with the circular guide rail, and the arc degree of the arc-shaped guide rail is consistent with that of the upper layer of the multilayer sea fog environment simulation system;
the solar simulation system is arranged on the arc-shaped guide rail and is in sliding fit with the arc-shaped guide rail;
the polarized emission system is arranged above a second glass window of the multilayer sea fog environment simulation system and is used for emitting polarized light;
the polarization receiving system is arranged below a first glass window of the multilayer sea fog environment simulation system and used for measuring the polarization state of polarized light received by the polarization receiving system and analyzing the transmission characteristic of the polarized light;
the sea fog particle generator is communicated with the sea fog environment simulation layer and is used for generating sea fog particles;
the atmospheric aerosol generator is communicated with the atmospheric environment simulation layer and is used for generating atmospheric aerosol particles;
the laser and the optical power meter are arranged oppositely and used for obtaining the optical thickness of the atmospheric environment simulation layer, the laser is placed above a second glass window of the multilayer sea fog environment simulation system, and the optical power meter is placed on the lower surface of the glass interlayer; when the optical thickness of the sea fog environment simulation layer is obtained, the laser is placed on the upper surface of a glass interlayer of the multilayer sea fog environment simulation system, and the optical power meter is placed below a first glass window of the multilayer sea fog environment simulation system;
the method comprises the following steps:
placing a laser above a second glass window of the multilayer sea fog environment simulation system, placing an optical power meter below a glass interlayer, starting the laser and the optical power meter, and starting the optical power meter to record the emergent light intensity; starting an atmospheric aerosol generator, charging atmospheric aerosol particles into an atmospheric environment simulation layer of the multilayer sea fog environment simulation system by the atmospheric aerosol generator, calculating the optical thickness of the atmospheric environment simulation layer according to light intensity values before and after the atmospheric aerosol particles are charged until the required optical thickness is met, stopping charging the atmospheric aerosol particles, and recording the charging time of the atmospheric aerosol particles;
discharging the atmospheric aerosol particles charged in the step one, placing a laser on the upper surface of a glass interlayer of the multilayer sea fog environment simulation system, placing an optical power meter below a first glass window of the multilayer sea fog environment simulation system, starting the laser and the optical power meter, and starting the optical power meter to record the emergent light intensity; starting a sea fog particle generator, filling sea fog particles into a sea fog environment simulation layer of the multi-layer sea fog environment simulation system, calculating the optical thickness of the sea fog environment simulation layer according to light intensity values before and after the sea fog particles are filled, stopping filling the sea fog particles until the required optical thickness is met, and recording the filling time of the sea fog particles;
step three, discharging the sea fog particles filled in the step two, respectively filling the atmosphere aerosol particles into the atmosphere environment simulation layer by the atmosphere aerosol generator according to the atmosphere aerosol filling time recorded in the step one, and filling the sea fog particles into the sea fog environment simulation layer by the sea fog particle generator according to the sea fog particle filling time recorded in the step two;
adjusting polarization information in a polarization transmitting system, recording data measured in a polarization receiving system, and measuring the active polarization transmission characteristic without the influence of illumination, wherein the polarization information comprises the wavelength and the polarization state of polarized light;
searching refractive index and particle size parameters according to the components of the sea fog particles generated by the sea fog particle generator, and sequentially inputting the polarized light wavelength, the polarized light polarization state, the refractive index of the sea fog particles, the particle size of the sea fog particles and the optical thickness value measured in the sea fog environment simulation layer transmitted by the polarized transmitting system into a Monte Carlo simulation program for simulating the polarization value under the influence of no illumination environment by a computer;
discharging the atmospheric aerosol particles and the sea fog particles filled in the step three, adjusting the positions of the solar simulation system relative to a horizontally-placed circular guide rail and a vertically-placed circular guide rail, determining the solar altitude and the solar azimuth, respectively refilling the atmospheric aerosol particles into the atmospheric environment simulation layer according to the atmospheric aerosol filling time recorded in the step one, and refilling the sea fog particles into the sea fog environment simulation layer according to the sea fog particle filling time recorded in the step two;
step seven, keeping the polarization information in the polarization transmitting system consistent with that in the step four, recording data measured in the polarization receiving system, and measuring the active polarization transmission characteristic under the influence of solar illumination;
inputting polarized light wavelength, solar altitude angle, solar azimuth angle, solar flux of a solar simulation system, radiation intensity of the solar simulation system, Legendre series parameters of scattering characteristics of atmospheric aerosol particles and sea fog particles into an RT3 program, and simulating the solar downlink radiation polarization degree at the position of a polarization receiving system under the influence of solar illumination by a computer;
step nine, comparing the polarization degree value of the active polarization without the influence of illumination measured in the step four with the polarization degree value of the active polarization without the influence of illumination environment simulated in the step five, and verifying the correctness of the test and simulation of the active polarization experiment without the influence of illumination; and comparing the polarization value under the influence of the solar illumination measured in the seventh step with the polarization value of the solar downlink radiation at the position of the polarization receiving system simulated by the computer in the eighth step and the polarization value of the active polarization under the influence of no illumination environment simulated by the computer in the fifth step, and verifying the influence of the solar illumination on the active polarization transmission.
Further, the solar simulation system consists of a xenon lamp and is arranged on the circular arc guide rail, and the solar simulation system can slide on the circular arc guide rail at any position except the position of the second glass window.
Through the design scheme, the invention can bring the following beneficial effects: the invention provides a method for verifying polarization transmission characteristics of sea fog environment under the influence of illumination, aiming at the complex sea environment of atmosphere-sea fog, the complex sea environment is simulated by utilizing a simplified double-layer structure of atmosphere and sea fog, and the polarization transmission process of sea fog environment and the downlink radiation polarization distribution under the influence of sunlight are simulated by adopting Monte Carlo and RT3 programs, so that the experimental verification and simulation of the active polarization transmission characteristics of the sea fog environment in the vertical direction under the conditions of no illumination influence and illumination influence can be respectively realized, the problems of changeable sea fog environment and overhigh cost of the experimental process when outdoor simulation verification is carried out are solved, the accuracy of the experimental test result is improved, and the accuracy can be verified by theory and experiment.
Drawings
The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings:
fig. 1 is a schematic diagram of a system structure adopted by the verification method for testing and simulating the polarization transmission characteristics of the sea fog environment under the influence of illumination.
FIG. 2 is a diagram of an optical thickness test structure of an atmospheric environment simulation layer.
FIG. 3 is a diagram of the optical thickness test structure of the sea fog environment simulation layer.
In the figure: 1-multilayer sea fog environment simulation system, 11-sea fog environment simulation layer, 12-atmospheric environment simulation layer, 13-glass interlayer, 14-circular guide rail, 15-circular guide rail, 16-first glass window, 17-second glass window, 2-solar simulation system, 3-polarized emission system, 4-polarized receiving system, 5-sea fog particle generator, 6-atmospheric aerosol generator, 7-laser and 8-optical power meter.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. As will be appreciated by those skilled in the art. The following detailed description is illustrative rather than limiting in nature and is not intended to limit the scope of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and that the features defined as "first" and "second" do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
A verification method for testing and simulating polarization transmission characteristics of sea fog environment under the influence of illumination is shown in figures 1, 2 and 3, and the system adopted by the method comprises a multilayer sea fog environment simulation system 1, a solar simulation system 2, a polarization transmitting system 3, a polarization receiving system 4, a sea fog particle generator 5, an atmospheric aerosol generator 6, a laser 7 and an optical power meter 8,
the multilayer sea fog environment simulation system 1 is of a hemispherical closed structure, the radius of the multilayer sea fog environment simulation system 1 is 2.4m, a second glass window 17 with the diameter of 50mm is arranged at the center of the top of the multilayer sea fog environment simulation system 1, the second glass window 17 is used for enabling light of the polarization emitting system 3 to enter the multilayer sea fog environment simulation system 1, a first glass window 16 with the diameter of 50mm is arranged at the center of the bottom of the multilayer sea fog environment simulation system 1, the first glass window 16 is used for enabling the polarization receiving system 4 to receive light information emitted from the multilayer sea fog environment simulation system 1, and a glass interlayer 13 is arranged inside the multilayer sea fog environment simulation system 1; the multilayer sea fog environment simulation system 1 is divided into an upper layer and a lower layer by the glass interlayer 13, the upper layer is an atmospheric environment simulation layer 12 with the height of 1.6m, the lower layer is a sea fog environment simulation layer 11 with the height of 0.8m, and the edge of the upper surface of the glass interlayer 13 is fixedly provided with a circular guide rail 14 which is coaxial with the glass interlayer; the circular guide rail 14 is provided with a circular arc guide rail 15 which is in sliding fit with the circular guide rail; the arc-shaped guide rail 15 and the circular ring-shaped guide rail 14 are vertically arranged, and the arc-shaped guide rail 15 is consistent with the upper layer radian of the multilayer sea fog environment simulation system 1;
the solar simulation system 2 consists of a xenon lamp, the power of the xenon lamp is 100W, the xenon lamp is arranged on the arc-shaped guide rail 15, and the solar simulation system 2 can slide on the arc-shaped guide rail 15 at any position except the position of the second glass window 17 and is used for simulating the solar altitude angle range of 20-89.4 degrees and 90.4-160 degrees; the circular arc guide rail 15 can slide on the circular ring-shaped guide rail 14 at will and is used for simulating the sun azimuth angle of 0-360 degrees.
The polarization emission system 3 is arranged above a second glass window 17 of the multilayer sea fog environment simulation system 1, and the polarization emission system 3 is used for emitting polarized light which is linearly polarized light and circularly polarized light; the linearly polarized light may be a visible light region having a wavelength of 450nm, 532nm or 671nm, or a near infrared region having a wavelength of 808nm or 1064nm, but is not limited thereto; the circularly polarized light may be circularly polarized light in the visible light region having a wavelength of 450nm, 532nm or 671nm, or may be circularly polarized light in the near infrared region having a wavelength of 808nm or 1064nm, but is not limited thereto;
the polarization receiving system 4 is arranged below a first glass window 16 of the multilayer sea fog environment simulation system 1, and the polarization receiving system 4 is used for measuring the polarization state of the polarized light received by the polarization receiving system and analyzing the transmission characteristic of the polarized light;
the sea fog particle generator 5 is communicated with the sea fog environment simulation layer 11, and the sea fog particle generator 5 is used for generating sea fog particles;
the atmospheric aerosol generator 6 is communicated with the atmospheric environment simulation layer 12, and the atmospheric aerosol generator 6 is used for generating atmospheric aerosol particles;
the laser 7 and the optical power meter 8 are arranged oppositely, and when the optical thickness of the atmospheric environment simulation layer 12 is obtained, the laser 7 is placed above a second glass window 17 of the multilayer sea fog environment simulation system 1, and the optical power meter 8 is placed on the lower surface of the glass interlayer 13; when the optical thickness of the sea fog environment simulation layer 11 is obtained, the laser 7 is placed on the upper surface of the glass interlayer 13 of the multilayer sea fog environment simulation system 1, and the optical power meter 8 is placed below the first glass window 16 of the multilayer sea fog environment simulation system 1;
the verification method for testing and simulating the polarization transmission characteristic of the sea fog environment under the influence of illumination needs equipment which also comprises the following steps: installing a VC + + computer system;
the method comprises the following steps:
step one, a laser 7 is placed above a second glass window 17 of the multilayer sea fog environment simulation system 1, an optical power meter 8 is placed below a glass interlayer 13, the laser 7 and the optical power meter 8 are started, and the optical power meter 8 starts to record the intensity of emergent light; starting the atmospheric aerosol generator 6, filling atmospheric aerosol particles into the atmospheric environment simulation layer 12 of the multilayer sea fog environment simulation system 1 by the atmospheric aerosol generator 6, calculating the optical thickness tau 1 of the atmospheric environment simulation layer 12 according to the light intensity values before and after filling the atmospheric aerosol particles,
wherein I1Is the intensity value of the emitted light when filled with atmospheric aerosol particles, I2Emitting light intensity values when the atmospheric aerosol particles are not filled until the required optical thickness is met, stopping filling the atmospheric aerosol particles, and recording the filling time of the atmospheric aerosol particles;
step two, discharging the atmospheric aerosol particles filled in the step one, placing a laser 7 on the upper surface of a glass interlayer 13 of the multilayer sea fog environment simulation system 1, and placing the laser on the multilayer sea fog environment simulation systemAn optical power meter 8 is arranged below a first glass window 16 of the system 1, a laser 7 and the optical power meter 8 are started, and the optical power meter 8 starts to record the intensity of emergent light; starting the sea fog particle generator 5, filling the sea fog particles into the sea fog environment simulation layer 11 of the multilayer sea fog environment simulation system 1, and calculating the optical thickness tau of the sea fog environment simulation layer 11 according to the light intensity values before and after filling the sea fog particles2，
Wherein I3Is the intensity value of the emitted light when filled with sea fog particles, I4Emitting light intensity values when the sea fog particles are not filled until the required optical thickness is met, stopping filling the sea fog particles, and recording the filling time of the sea fog particles;
step three, discharging the sea fog particles filled in the step two, respectively filling the atmosphere aerosol particles into the atmosphere environment simulation layer 12 by the atmosphere aerosol generator 6 according to the atmosphere aerosol filling time recorded in the step one, and filling the sea fog particles into the sea fog environment simulation layer 11 by the sea fog particle generator 5 according to the sea fog particle filling time recorded in the step two;
adjusting polarization information in the polarization transmitting system 3, recording data measured in the polarization receiving system 4, and measuring the active polarization transmission characteristic without the influence of illumination, wherein the polarization information comprises the wavelength and the polarization state of polarized light;
fifthly, searching refractive index and particle size parameters according to the components of the sea fog particles generated by the sea fog particle generator 5, and sequentially inputting the polarized light wavelength, the polarized light polarization state, the refractive index of the sea fog particles, the particle size of the sea fog particles and the optical thickness value measured in the sea fog environment simulation layer 11 transmitted by the polarized transmitting system 3 into a Monte Carlo simulation program for simulating the polarization value under the influence of no illumination environment by a computer;
discharging the atmospheric aerosol particles and the sea fog particles charged in the third step, adjusting the positions of the solar simulation system 2 relative to a horizontally-placed circular guide rail 14 and a vertically-placed circular guide rail 15, determining the solar altitude angle and the solar azimuth angle, respectively recharging the atmospheric aerosol particles into the atmospheric environment simulation layer 12 according to the atmospheric aerosol charging time recorded in the first step, and recharging the sea fog particles into the sea fog environment simulation layer 11 according to the sea fog particle charging time recorded in the second step;
step seven, keeping the polarization starting information in the polarization transmitting system 3 consistent with that in the step four, recording data measured in the polarization receiving system 4, and measuring the active polarization transmission characteristic under the influence of solar illumination;
inputting polarized light wavelength, solar altitude angle, solar azimuth angle, solar flux of the solar simulation system 2, radiation intensity of the solar simulation system 2, Legendre series parameters of scattering characteristics of atmospheric aerosol particles and sea fog particles into an RT3 program, and simulating the solar downlink radiation polarization degree at the position of the polarization receiving system 4 under the influence of solar illumination by a computer;
step nine, comparing the polarization degree value of the active polarization without the influence of illumination measured in the step four with the polarization degree value of the active polarization without the influence of illumination environment simulated in the step five, and verifying the correctness of the test and simulation of the active polarization experiment without the influence of illumination; and comparing the polarization value under the influence of the solar illumination measured in the seventh step with the polarization value of the solar downlink radiation at the position of the polarization receiving system 4 simulated by the computer in the eighth step and the polarization value of the active polarization under the influence of no illumination environment simulated by the computer in the fifth step, and verifying the influence of the solar illumination on the active polarization transmission.
And the Monte Carlo simulation program in the fifth step is a simulation program for simulating and calculating the uniform spherical particles.
The RT3 program in the step eight is a simulation program for simulating and calculating polarized radiation among media of each layer under the influence of solar illumination; the Legendre series of the scattering characteristics of the atmospheric aerosol and the sea fog particles are respectively calculated by Rayleigh and Mie scattering methods.
Claims (2)
1. The verification method for testing and simulating the polarization transmission characteristic of the sea fog environment under the influence of illumination is characterized by comprising the following steps of: the system adopted by the method comprises a multilayer sea fog environment simulation system (1), a solar simulation system (2), a polarization transmitting system (3), a polarization receiving system (4), a sea fog particle generator (5), an atmospheric aerosol generator (6), a laser (7) and an optical power meter (8),
the multilayer sea fog environment simulation system (1) is of a hemispherical closed structure, a second glass window (17) is arranged in the center of the top of the multilayer sea fog environment simulation system (1), a first glass window (16) is arranged in the center of the bottom of the multilayer sea fog environment simulation system (1), and a glass interlayer (13) is arranged in the multilayer sea fog environment simulation system (1); the multilayer sea fog environment simulation system (1) is divided into an upper layer and a lower layer by the glass interlayer (13), the upper layer is an atmospheric environment simulation layer (12), the lower layer is a sea fog environment simulation layer (11), and a circular guide rail (14) which is coaxial with the glass interlayer (13) is fixed on the edge of the upper surface of the glass interlayer; the circular guide rail (14) is provided with a circular arc guide rail (15) in sliding fit with the circular guide rail; the arc-shaped guide rail (15) is vertically arranged with the circular ring-shaped guide rail (14), and the arc-shaped guide rail (15) is consistent with the upper layer radian of the multilayer sea fog environment simulation system (1);
the solar simulation system (2) is arranged on the arc-shaped guide rail (15);
the polarized emission system (3) is arranged above a second glass window (17) of the multilayer sea fog environment simulation system (1), and the polarized emission system (3) is used for emitting polarized light;
the polarization receiving system (4) is arranged below a first glass window (16) of the multilayer sea fog environment simulation system (1), and the polarization receiving system (4) is used for measuring the polarization state of polarized light received by the polarization receiving system and analyzing the transmission characteristic of the polarized light;
the sea fog particle generator (5) is communicated with the sea fog environment simulation layer (11), and the sea fog particle generator (5) is used for generating sea fog particles;
the atmospheric aerosol generator (6) is communicated with the atmospheric environment simulation layer (12), and the atmospheric aerosol generator (6) is used for generating atmospheric aerosol particles;
the laser (7) and the optical power meter (8) are arranged oppositely and used for obtaining the optical thickness of the atmospheric environment simulation layer (12), the laser (7) is placed above a second glass window (17) of the multilayer sea fog environment simulation system (1), and the optical power meter (8) is placed on the lower surface of the glass interlayer (13); when the device is used for obtaining the optical thickness of the sea fog environment simulation layer (11), the laser (7) is placed on the upper surface of a glass interlayer (13) of the multilayer sea fog environment simulation system (1), and the optical power meter (8) is placed below a first glass window (16) of the multilayer sea fog environment simulation system (1);
the method comprises the following steps:
step one, a laser (7) is placed above a second glass window (17) of a multilayer sea fog environment simulation system (1), an optical power meter (8) is placed below a glass interlayer (13), the laser (7) and the optical power meter (8) are started, and the optical power meter (8) starts to record emergent light intensity; starting an atmospheric aerosol generator (6), filling atmospheric aerosol particles into an atmospheric environment simulation layer (12) of the multilayer sea fog environment simulation system (1) by the atmospheric aerosol generator (6), calculating the optical thickness of the atmospheric environment simulation layer (12) according to light intensity values before and after the atmospheric aerosol particles are filled until the required optical thickness is met, stopping filling the atmospheric aerosol particles, and recording the filling time of the atmospheric aerosol particles;
step two, discharging the atmospheric aerosol particles charged in the step one, placing a laser (7) on the upper surface of a glass interlayer (13) of the multilayer sea fog environment simulation system (1), placing an optical power meter (8) below a first glass window (16) of the multilayer sea fog environment simulation system (1), starting the laser (7) and the optical power meter (8), and starting the optical power meter (8) to record the emergent light intensity; starting a sea fog particle generator (5), filling sea fog particles into a sea fog environment simulation layer (11) of the multilayer sea fog environment simulation system (1), calculating the optical thickness of the sea fog environment simulation layer (11) according to light intensity values before and after the sea fog particles are filled until the required optical thickness is met, stopping filling the sea fog particles, and recording the filling time of the sea fog particles;
step three, discharging the sea fog particles filled in the step two, respectively filling the atmosphere aerosol particles into the atmosphere environment simulation layer (12) by the atmosphere aerosol generator (6) according to the atmosphere aerosol filling time recorded in the step one, and filling the sea fog particles into the sea fog environment simulation layer (11) by the sea fog particle generator (5) according to the sea fog particle filling time recorded in the step two;
adjusting polarization starting information in the polarization transmitting system (3), recording data measured in the polarization receiving system (4), and measuring the active polarization transmission characteristic without the influence of illumination, wherein the polarization starting information comprises the wavelength and the polarization state of polarized light;
fifthly, searching refractive index and particle size parameters according to the components of the sea fog particles generated by the sea fog particle generator (5), and sequentially inputting the polarized light wavelength, the polarized light polarization state, the refractive index of the sea fog particles, the particle size of the sea fog particles and the optical thickness value measured in the sea fog environment simulation layer (11) transmitted by the polarized transmission system (3) into a Monte Carlo simulation program for simulating the polarization value under the influence of no illumination environment by a computer;
step six, discharging the atmospheric aerosol particles and the sea fog particles filled in the step three, adjusting the positions of the solar simulation system (2) relative to a horizontally-placed circular guide rail (14) and a vertically-placed circular guide rail (15), determining a solar altitude angle and a solar azimuth angle, respectively refilling the atmospheric aerosol particles into the atmospheric environment simulation layer (12) according to the atmospheric aerosol filling time recorded in the step one, and refilling the sea fog particles into the sea fog environment simulation layer (11) according to the sea fog particle filling time recorded in the step two;
step seven, keeping the polarization starting information in the polarization transmitting system (3) consistent with that in the step four, recording data measured in the polarization receiving system (4), and measuring the active polarization transmission characteristic under the influence of solar illumination;
inputting polarized light wavelength, solar altitude angle, solar azimuth angle, solar flux of the solar simulation system (2), radiation intensity of the solar simulation system (2), Legendre series parameters of atmospheric aerosol particles and sea fog particle scattering characteristics into an RT3 program, and simulating the solar downlink radiation polarization degree at the position of the polarization receiving system (4) under the influence of solar illumination by a computer;
step nine, comparing the polarization degree value of the active polarization without the influence of illumination measured in the step four with the polarization degree value of the active polarization without the influence of illumination environment simulated in the step five, and verifying the correctness of the test and simulation of the active polarization experiment without the influence of illumination; and comparing the polarization value under the influence of the solar illumination measured in the seventh step with the polarization value of the solar downlink radiation at the position of the polarization receiving system (4) simulated by the computer in the eighth step and the polarization value of the active polarization under the influence of no illumination environment simulated by the computer in the fifth step, and verifying the influence of the solar illumination on the active polarization transmission.
2. The method for verifying the polarization transmission characteristic test and simulation of the marine fog environment under the influence of illumination according to claim 1, wherein: the solar simulation system (2) consists of a xenon lamp, the power of the xenon lamp is 100W, the xenon lamp is arranged on the arc-shaped guide rail (15), and the solar simulation system (2) can slide freely on the arc-shaped guide rail (15) except the position of the second glass window (17).
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