Imaging Components, Systems, and Processing

Sensitivity of point-source infrared signatures to anisotropic emission behavior

[+] Author Affiliations
Yong Huang, Xue Cui

Beijing University of Aeronautics and Astronautics, School of Aeronautical Science and Engineering, 37 Xueyuan Road, Haidian District, Beijing 100191, China

Opt. Eng. 54(7), 073104 (Jul 07, 2015). doi:10.1117/1.OE.54.7.073104
History: Received April 10, 2015; Accepted June 8, 2015
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Abstract.  A technique for modulating point-target infrared (IR) signatures based on the anisotropic emission behavior of the target surface is proposed. The pixel equation is used as the physical basis for quantifying the IR transmission process and is evaluated by the ray tracing method. The maximum ability to enhance and reduce signals is represented by the positive and negative maximums of the sensitivity. It is found that the modulating effects of anisotropic emission properties upon IR signals are closely related to the geometric features as well as the hemispherical emissivity. The plane is the most sensitive, while the sphere, whose sensitivity approaches zero, is the least sensitive. Furthermore, as for the nonspherical targets, the smaller the hemisphere is, the better the modulating effects are.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Yong Huang and Xue Cui
"Sensitivity of point-source infrared signatures to anisotropic emission behavior", Opt. Eng. 54(7), 073104 (Jul 07, 2015). ; http://dx.doi.org/10.1117/1.OE.54.7.073104


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