Diffuse characteristics study of laser target board using Monte Carlo simulation

Pengling Yang; Yong Wu; Zhenbao Wang; Mengmeng Tao; Junjie Wu; Ping Wang; Yan Yan; Lei Zhang; Gang Feng; Jinghui Zhu; Guobin Feng

doi:10.1117/12.2011082

16 May 2013 Diffuse characteristics study of laser target board using Monte Carlo simulation

Pengling Yang, Yong Wu, Zhenbao Wang , Mengmeng Tao, Junjie Wu, Ping Wang, Yan Yan, Lei Zhang, Gang Feng, Jinghui Zhu, Guobin Feng

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Proceedings Volume 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012); 87960E (2013) https://doi.org/10.1117/12.2011082
Event: 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 2012, Xi'an, Shaanxi, China

Abstract

In this paper, Torrance-Sparrow and Oren-Nayar model is adopt to study diffuse characteristics of laser target board. The model which based on geometric optics, assumes that rough surfaces are made up of a series of symmetric V-groove cavities with different slopes at microscopic level. The distribution of the slopes of the V-grooves are modeled as beckman distribution function, and every microfacet of the V-groove cavity is assumed to behave like a perfect mirror, which means the reflected ray follows Fresnel law at the microfacet. The masking and shadowing effects of rough surface are also taken into account through geometric attenuation factor. Monte Carlo method is used to simulate the diffuse reflectance distribution of the laser target board with different materials and processing technology, and all the calculated results are verified by experiment. It is shown that the profile of bidirectional reflectance distribution curve is lobe-shaped with the maximum lies along the mirror reflection direction. The width of the profile is narrower for a lower roughness value, and broader for a higher roughness value. The refractive index of target material will also influence the intensity and distribution of diffuse reflectance of laser target surface.

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Pengling Yang, Yong Wu, Zhenbao Wang , Mengmeng Tao, Junjie Wu, Ping Wang, Yan Yan, Lei Zhang, Gang Feng, Jinghui Zhu, and Guobin Feng "Diffuse characteristics study of laser target board using Monte Carlo simulation", Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 87960E (16 May 2013); https://doi.org/10.1117/12.2011082

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KEYWORDS

Reflectivity

Monte Carlo methods

Reflection

Diffuse reflectance spectroscopy

Mirrors

Signal attenuation

Picosecond phenomena

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