Krywonos Andrey, Harvey James E, Choi Narak
The Center for Research and Education in Optics and Lasers, P.O. Box 162700, 4000 Central Florida Boulevard, The University of Central Florida, Orlando, Florida 32826, USA.
J Opt Soc Am A Opt Image Sci Vis. 2011 Jun 1;28(6):1121-38. doi: 10.1364/JOSAA.28.001121.
Scattering effects from microtopographic surface roughness are merely nonparaxial diffraction phenomena resulting from random phase variations in the reflected or transmitted wavefront. Rayleigh-Rice, Beckmann-Kirchhoff. or Harvey-Shack surface scatter theories are commonly used to predict surface scatter effects. Smooth-surface and/or paraxial approximations have severely limited the range of applicability of each of the above theoretical treatments. A recent linear systems formulation of nonparaxial scalar diffraction theory applied to surface scatter phenomena resulted first in an empirically modified Beckmann-Kirchhoff surface scatter model, then a generalized Harvey-Shack theory that produces accurate results for rougher surfaces than the Rayleigh-Rice theory and for larger incident and scattered angles than the classical Beckmann-Kirchhoff and the original Harvey-Shack theories. These new developments simplify the analysis and understanding of nonintuitive scattering behavior from rough surfaces illuminated at arbitrary incident angles.
微观地形表面粗糙度产生的散射效应仅仅是由反射或透射波前的随机相位变化引起的非傍轴衍射现象。瑞利 - 赖斯、贝克曼 - 基尔霍夫或哈维 - 沙克表面散射理论通常用于预测表面散射效应。光滑表面和/或傍轴近似严重限制了上述每种理论处理方法的适用范围。最近将非傍轴标量衍射理论应用于表面散射现象的线性系统公式化，首先产生了一个经经验修正的贝克曼 - 基尔霍夫表面散射模型，然后是一个广义的哈维 - 沙克理论，该理论对于比瑞利 - 赖斯理论更粗糙的表面以及比经典贝克曼 - 基尔霍夫和原始哈维 - 沙克理论更大的入射角能产生准确的结果。这些新进展简化了对以任意入射角照射的粗糙表面的非直观散射行为的分析和理解。
