Influence of Smoke Concentration on Transmission Characteristics of Polarized Light

Su, 张肃 Zhang; Juntong, 战俊彤 Zhan; Sike, 白思克 Bai; Qiang, 付强 Fu; Jin, 段锦 Duan; Huilin, 姜会林 Jiang

doi:10.3788/aos201636.0729001

Cited by 6 publications

(3 citation statements)

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“…The mechanical table body is mainly composed of semi-circular camera arm, semicircular light source arm, stage, rotary guide rail, camera trolley, light source trolley, rotary trolley, light source, bracket and darkroom cover. The darkroom hood is composed of a folding frame and a light-absorbing curtain, which can effectively reduce the influence of other stray light on the experiment [27][28][29]; The camera arm is used to support the camera -60˚~+60˚pitch movement, the light source arm is used to support the light source -60˚~+60˚pitch movement, and the rotary guide rail is mainly used to support the 360˚rotation movement of the camera and light source. The stage is used to carry the experimental sample, which can be adjusted in three dimensions in space, and the hollowing is so that there is a certain space below for This structural scheme follows the principles of light structure, convenient transportation, accurate positioning, stable movement and simple structure to carry out the design, the camera is easy to disassemble and assemble, so that the position accuracy of light source rotation, light source pitch and camera pitch can be guaranteed, and the finished product is shown in Fig 6.…”

Section: Design Of Optical Detection System For Oil Spill Polarizatio...mentioning

confidence: 99%

Detection and identification of oil spill species based on polarization information

Sun,

Zhao,

et al. 2023

PLoS ONE

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Aiming at the problem of poor oil identification accuracy in existing oil spill detection technologies, the polarization degree model of oil spill on rough sea surface under different azimuths and zenith angles was established based on Fresnel theory. The analytical expressions of visible light polarization degree in calm and fluctuating water surface were derived respectively, and the polarization degree model of oil spill in reflection space was constructed. The effectiveness of the method and its influence on the polarization distribution of oil spill were analyzed by simulation. A portable turntable was designed to test the polarization characteristics of the experiment, and the visible light polarization detection experiment was carried out. The visible light polarization images of five typical oil spills at different observation azimuth and zenth angles were obtained. The differences in the polarization degrees of different oil species were analyzed, and the correctness of the theoretical model was proved by experiments. The polarization detection experiment of visible light pBRDF was completed, which more intuitively showed the variation law of the polarization characteristics of light reflected by different oil spills in different spatial positions. Using polarization information to distinguish oil species is a useful supplement to the traditional oil spill detection method and has important significance to improve the marine pollution control ability.

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Section: Design Of Optical Detection System For Oil Spill Polarizatio...mentioning

confidence: 99%

Detection and identification of oil spill species based on polarization information

Sun,

Zhao,

et al. 2023

PLoS ONE

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show abstract

“…rm   to ensure that the MIE scattering conditions are met, the number of particles per unit volume is 9 10 N  , the total number of emitted photons is 6 10 , and the wavelength of incident light is 532 nm. The suspended particles in the ocean are mainly algal plankton and sand sediments [26].…”

Section: Simulation Test and Analysismentioning

confidence: 99%

“…The strong scattering and absorption of light by seawater media is the technical bottleneck of underwater optical imaging. Given that the wavelength of light is nearly equivalent to the size of suspended particles and organic molecules in seawater, the scattering of light by seawater is substantially more serious than the scattering of sound waves [2]- [9]. Multiple scattering changes the direction, phase, and polarization state of photons that result in a decline in optical imaging quality.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Complex Refractive Index of Underwater Suspended Particles on the Transmission Characteristics of Polarized Light

Qian

Wang

2020

IEEE Access

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The effects of different complex refractive indices of underwater suspended particles on the polarization characteristics of forward and backward scattering of polarized photons are analyzed by simulation experiments to study the transmission characteristics of polarized light as influenced by underwater suspended particles. The Mie scattering theory is used to establish the scattering model of underwater photon transmission. The Mueller matrix and Meridian Planes Monte Carlo method are adopted to simulate the process of photon radiation transmission in the scattering medium. Simulation results show that the polarization degree of the scattered linearly polarized light is less affected than the scattered circularly polarized light by the refractive index parameter in the scattering system. As the absorption coefficient increases, the polarization-maintaining ability of the forward scattered linearly polarized light is enhanced, whereas the degree of circular polarization of the backward scattered circularly polarized light is periodically changed.

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Analysis of the polarization characteristics of scattered light of underwater suspended particles based on Mie theory

Qian

Wang

Zhang

2021

Optoelectron. Lett.

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Influence of Smoke Concentration on Transmission Characteristics of Polarized Light

Cited by 6 publications

References 0 publications

Detection and identification of oil spill species based on polarization information

Detection and identification of oil spill species based on polarization information

Influence of the Complex Refractive Index of Underwater Suspended Particles on the Transmission Characteristics of Polarized Light

Analysis of the polarization characteristics of scattered light of underwater suspended particles based on Mie theory

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