吉林大学学报(理学版)

• 数学 • 上一篇    下一篇

基于优化方法重构光栅形状

尹伟石1, 郭玉坤2, 陈国芳3, 李喆1   

  1. 1. 长春理工大学 理学院, 长春 130022; 2. 哈尔滨工业大学 理学院, 哈尔滨 150001;3. 吉林省教育学院 少数民族教育学院, 长春 130022
  • 收稿日期:2013-08-09 出版日期:2014-03-26 发布日期:2014-03-20
  • 通讯作者: 李喆 E-mail:zheli200809@163.com

Numerical Calculation of the Inverse DiffractionProblem for Grating by Optimization Method

YIN Weishi1, GUO Yukun2, CHEN Guofang3, LI Zhe1   

  1. 1. College of Science, Changchun University of Science and Technology, Changchun 130022, China;2. School of Science, Harbin Institue of Technology, Harbin 150001, China;3. College of Minority Education, Jilin Provincial Institute of Education, Changchun 130022, China
  • Received:2013-08-09 Online:2014-03-26 Published:2014-03-20
  • Contact: LI Zhe E-mail:zheli200809@163.com

摘要:

考虑光栅形状重构问题, 即从已知的近场Cauchy数据出发, 重构良导体光栅表面形状. 基于平面波的稠密性, 先将衍射场近似写成有限个平面波的线性叠加, 再利用观测数据得到衍射场的近似, 最后使用数值优化方法逼近光栅形状. 数值算例验证了方法的有效性.

关键词: 光栅, 重构, Helmholtz方程, 优化方法

Abstract:

A grating reconstruction problem from near field data was considered. On the basis of the denseness of plane waves, we approximately denoted the scattered field with a sum of finite plane waves, and computed it from the known observation data. Then the grating profile was reconstructed by an optimization method. The numerical experiments confirm the effectiveness of our method.

Key words: grating, reconstruction, Helmholtz equation, optimization method

中图分类号: 

  • O241.82