Broad-Band Transmission Characteristics of Polarizations in Foggy Environments

Abstract

Based on the Monte Carlo (MC) algorithm, we simulate the evolutions of different types of the polarized lights in the broad-band range from visible to infrared in foggy environments. Here, we have constructed two scattering systems to simulate the transmission characteristics of the polarized lights: (1) A monodisperse system based on five types of particles with the sizes of 0.5, 1.0, 2.5, 4, and 5 µm, respectively; (2) a polydisperse system based on scattering particles with a mean value (size) of 2.0 μm. Our simulation results show that linearly polarized light (LPL) and circularly polarized light (CPL) exhibit different advantages in different wavelengths and different scattering systems. The polarization maintenances (PM) of the degree of circular polarizations (DoCPs) are better than those of the degree of linear polarizations (DoLPs) for most incident wavelengths. CPL is not superior to LPL in the strong-absorption wavelengths of 3.0µm, 6.0µm, and long infrared. Here, when the wavelength is closer to the particle sizes in a system, the influence on propagating polarizations will be more obvious. However, the difference in the degree of polarization (DoP) between the resulting CPL and LPL is positive at these points, which means the penetrating ability of CPL is superior to that of LPL in these scattering systems. We have also simulated the extinction efficiency Qext and the scattering index ratio Qratio as functions of both wavelength and particle size for analyzing polarization’s transmission characteristics. Our work paves the way of selecting the optimal incident wavelengths and polarizations for concrete scattering systems.

Depolarization Characteristics of Different Reflective Interfaces Indicated by Indices of Polarimetric Purity (IPPs)

“…As a famous geometrical optics model, the Torrance–Sparrow (T-S) model [ 15 ] has been widely investigated and expanded to the polarized BRDF (pBRDF) models [ 16 , 17 , 18 , 19 , 20 , 21 ]. The Monte Carlo (MC) method has also been introduced to solve the composition of samples in fusion devices or reactive plasmas and a series of cases about polarization information [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], especially in photons tracking [ 24 , 25 , 29 , 30 ]. Wang et al have combined the MC model with BRDF, giving birth to a flexible method to acquire the reflective polarization information from a rough surface [ 34 ].…”

Performances of Polarization-Retrieve Imaging in Stratified Dispersion Media

“…However, all the above methods focus on removing the scattering light. In contrast, based on the Monte Carlo (MC) algorithm for obtaining the Mueller matrix of the transmission medium [26][27][28][29][30][31], the polarization retrieve (PR) method [32,33] has been proposed for investigating the transmission characteristics of the polarization information in different environments, such as poly-dispersion system [34], layered atmosphere [35,36], and underwater [37,38]. This method can retrieve the original target information and obtain much clearer images, which demonstrates its potential applications in a complex scattering system with long transmission distance.…”

Analyzing Polarization Transmission Characteristics in Foggy Environments Based on the Indices of Polarimetric Purity

“…Xu et al investigated the transmission characteristics of polarization information in different disperse systems in details, such as mono-disperse and poly-disperse scattering systems [22][23][24][25]. Wang et al studied the polarization characteristics in the cloud disperse system [26,27] and Zhang et al explored the imaging quality of biological tissues [28,29].…”

“…Therefore, researchers are trying to investigate polarization parameters to describe specific microstructures. Among them, Mueller matrix (MM) [22][23][24][25][26][27][28] has attracted more and more attentions as a characterization method since it can comprehensively reflect the polarization characteristics of media. In the past several years, MM has been preliminarily used in optical communication [22][23][24], polarization imaging [25,26], and detection of cancer tissues [28].…”