中国物理B ›› 2017, Vol. 26 ›› Issue (6): 64201-064201.doi: 10.1088/1674-1056/26/6/064201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Difference scattering field properties between periodic defect particles and three-dimensional slightly rough optical surface

Cheng-Xian Ge(葛城显), Zhen-Sen Wu(吴振森), Jing Bai(白靖), Lei Gong(巩蕾)   

  1. 1 School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China;
    2 School of Photoelectric Engineering, Xi'an Technological University, Xi'an 710021, China
  • 收稿日期:2016-12-07 修回日期:2017-01-21 出版日期:2017-06-05 发布日期:2017-06-05
  • 通讯作者: Zhen-Sen Wu E-mail:wuzhs@mail.xidian.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61308071, 61601355, and 61571355) and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2016JM6011).

Difference scattering field properties between periodic defect particles and three-dimensional slightly rough optical surface

Cheng-Xian Ge(葛城显)1, Zhen-Sen Wu(吴振森)1, Jing Bai(白靖)1, Lei Gong(巩蕾)2   

  1. 1 School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China;
    2 School of Photoelectric Engineering, Xi'an Technological University, Xi'an 710021, China
  • Received:2016-12-07 Revised:2017-01-21 Online:2017-06-05 Published:2017-06-05
  • Contact: Zhen-Sen Wu E-mail:wuzhs@mail.xidian.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61308071, 61601355, and 61571355) and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2016JM6011).

摘要:

Based on the practical situation of nondestructive examination, the calculation model of the composite scattering is established by using a three-dimensional half-space finite difference time domain, and the Monte Carlo method is used to solve the problem of the optical surface with roughness in the proposed scheme. Moreover, the defect particles are observed as periodic particles for a more complex situation. In order to obtain the scattering contribution of defects inside the optical surface, a difference radar cross section is added into the model to analyze the selected calculations on the effects of numbers, separation distances, different depths and different materials of defects. The effects of different incident angles are also discussed. The numerical results are analyzed in detail to demonstrate the best position to find the defects in the optical surface by detecting in steps of a fixed degree for the incident angle.

关键词: light scattering, difference scattering field, periodic particles, rough optical surface

Abstract:

Based on the practical situation of nondestructive examination, the calculation model of the composite scattering is established by using a three-dimensional half-space finite difference time domain, and the Monte Carlo method is used to solve the problem of the optical surface with roughness in the proposed scheme. Moreover, the defect particles are observed as periodic particles for a more complex situation. In order to obtain the scattering contribution of defects inside the optical surface, a difference radar cross section is added into the model to analyze the selected calculations on the effects of numbers, separation distances, different depths and different materials of defects. The effects of different incident angles are also discussed. The numerical results are analyzed in detail to demonstrate the best position to find the defects in the optical surface by detecting in steps of a fixed degree for the incident angle.

Key words: light scattering, difference scattering field, periodic particles, rough optical surface

中图分类号:  (Diffraction and scattering)

  • 42.25.Fx
42.25.Bs (Wave propagation, transmission and absorption) 42.25.Dd (Wave propagation in random media) 02.70.Bf (Finite-difference methods)