计算物理 ›› 2012, Vol. 29 ›› Issue (6): 876-880.

• 论文 • 上一篇    下一篇

基于区域分解和逐级光线分裂的杂散光分析

陈学, 孙创, 夏新林   

  1. 哈尔滨工业大学 能源科学与工程学院, 黑龙江 哈尔滨 150001
  • 收稿日期:2012-03-05 修回日期:2012-05-27 出版日期:2012-11-25 发布日期:2012-11-25
  • 通讯作者: 新林,E-mail:xiaxl@hit.edu.cn
  • 作者简介:陈学(1985-),男,博士研究生,主要从事红外仿真与杂散光分析研究
  • 基金资助:
    国家自然科学基金(51176038)资助项目

Stray Light Analysis Based on Domain Decomposition and Staged Ray Splitting

CHEN Xue, SUN Chuang, XIA Xinlin   

  1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2012-03-05 Revised:2012-05-27 Online:2012-11-25 Published:2012-11-25

摘要: 针对蒙特卡罗法运算量大的问题,通过引入区域分解和逐级光线分裂技术,减少杂散光线与表面交点求解时所涉及的表面数及跟踪光线数,降低计算量.区域分解时,考虑子区域与表面数的匹配关系;并基于杂散光传播过程的模拟信息,逐级确定光线分裂倍数.以大衰减比抑制结构和多传感器系统为例,进行杂散光分析.结果表明,对复杂系统杂散光传播的蒙特卡罗法模拟,应用区域分解和逐级光线分裂技术,可以在保持计算精度的前提下,有效地提高计算效率.

关键词: 杂散光, 蒙特卡罗法, 区域分解, 逐级光线分裂

Abstract: A technique combined domain decomposition and staged ray splitting is presented to decrease computational complexity by reducing surfaces and rays for intersections solution.Domain decomposition is based on relation between sub-zone and number of surfaces.Splitting ratio is determined with propagation information of stray light.A suppression structure and a multi-sensor system are analyzed.It shows that the technique can improve computational efficiency while maintaining acceptable accuracy.

Key words: stray light, Monte Carlo method, domain decomposition, staged ray splitting

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