Scattering characteristics of targets at different wavelengths based on Kirchhoff scalar approximation theory

Chengcheng Li; Sining Li; Peng Jiang; Yan Qiao; Jianfeng Sun; Xin Zhou; Hailong Zhang; Qi Wang

doi:10.1117/12.2603998

24 November 2021 Scattering characteristics of targets at different wavelengths based on Kirchhoff scalar approximation theory

Chengcheng Li, Sining Li, Peng Jiang, Yan Qiao, Jianfeng Sun, Xin Zhou, Hailong Zhang, Qi Wang

Author Affiliations +

Proceedings Volume 12065, AOPC 2021: Optical Sensing and Imaging Technology; 120650Q (2021) https://doi.org/10.1117/12.2603998
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Bi-directional reflection distribution function (BRDF) is a common method to study the laser scattering characteristics of targets, and it is an important parameter for the theoretical demonstration of laser active detection, target recognition and classification. Scholars at home and abroad have proposed many mature BRDF models to describe the scattering characteristics of different targets. However, almost all of these models do not take into account the effect of incident wavelength on scattering characteristics. In addition, limited by the frequency modulation range of the laser, the existing BRDF measurement devices cannot obtain the BRDF data of the target at any wavelength, which restricts the application of the existing BRDF model. In view of this limitation, a method is proposed to calculate the unknown wavelength BRDF data using the BRDF measurement data of known wavelengths. Firstly, based on the Kirchhoff approximation theory, the spatial distribution of the scattered light field of the metal aluminum target at any wavelength was simulated and analyzed. Secondly, the error of the theoretical simulation model was analyzed through the experimental data. Finally, the BRDF data at any wavelength were calculated using the simulation data and the experimental data with known wavelengths. The final results showed that at the 1064nm wavelength, the RMSE value of the calculated data obtained by this method is 0.3553, which is 0.2233 smaller than the RMSE value of the simulation data.This method is effective in calculating the BRDF of metal aluminum targets at different wavelengths.

Citation Download Citation

Chengcheng Li, Sining Li, Peng Jiang, Yan Qiao, Jianfeng Sun, Xin Zhou, Hailong Zhang, and Qi Wang "Scattering characteristics of targets at different wavelengths based on Kirchhoff scalar approximation theory", Proc. SPIE 12065, AOPC 2021: Optical Sensing and Imaging Technology, 120650Q (24 November 2021); https://doi.org/10.1117/12.2603998

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KEYWORDS

Scattering

Laser scattering

Reflectivity

Optical simulations

Aluminum

Data modeling

Target detection

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