21 May 2015 Simulation on polarization states of finite surface for infrared scenes
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Abstract
A simulation method for analyzing polarization states for infrared scenes is proposed in order to study the polarization features of infrared spontaneous emission deeply, since current infrared polarization devices can’t show the polarization signature of infrared spontaneous emission for a target or an object well. A preliminary analysis on polarization characteristics of infrared spontaneous emission in the ideal case is carried out and also a corresponding ideal model is established through Kirchhoff’s law and the Fresnel theorem. Based on the newly built ideal model, a three-dimensional (3D) scene modeling and simulation based on the OpenSceneGraph (OSG) rendering engine is utilized to obtain the polarization scene of infrared emission under ideal conditions. Through the corresponding software, different infrared scenes can be generated by adjusting the input parameters. By interacting with the scene, the infrared polarization images can be acquired readily, also a fact can be obviously confirmed that the degree of linear polarization (DoLP) for an object in the 3D scene varies with the many factors such as emission angle and complex refractive index. Moreover, large difference between two kinds of material such as metal and nonmetal in the polarization characteristics of infrared spontaneous emission at the same temperature can be easily discerned in the 3D scene. The 3D scene simulation and modeling in the ideal case provides a direct understanding on infrared polarization property, which is of great significance for the further study of infrared polarization characteristics in the situation of real scenes.
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Ying Gao, Lin Wang, Xiaopeng Shao, Fei Liu, "Simulation on polarization states of finite surface for infrared scenes", Proc. SPIE 9501, Satellite Data Compression, Communications, and Processing XI, 950115 (21 May 2015); doi: 10.1117/12.2176747; https://doi.org/10.1117/12.2176747
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