变间距采样及准梯度下降法实现光束整形

计算物理 ›› 2004, Vol. 21 ›› Issue (1): 10-14.

变间距采样及准梯度下降法实现光束整形

赵逸琼¹, 伍源², 周秋桂¹, 李永平¹

1. 中国科学技术大学物理系, 安徽合肥 230026;
2. 国家同步辐射实验室, 安徽合肥 230027

收稿日期:2002-12-16 修回日期:2003-09-04 出版日期:2004-01-25 发布日期:2004-01-25
作者简介:赵逸琼(1977-),女,福建福州人,博士生,从事微光学和光信息处理研究.
基金资助:
国家863-804课题资助项目

Shaping by Using Quasi Gradient Decent Algorithm at Variable Sampling Intervals

ZHAO Yi-qiong¹, WU Yuan², ZHOU Qiu-gui¹, LI Yong-ping¹

1. Department of Physics, University of Science and Technology of China, Hefei 230026, China;
2. National Synchrotron Radiation Laboratory, Hefei 230027, China

Received:2002-12-16 Revised:2003-09-04 Online:2004-01-25 Published:2004-01-25

摘要/Abstract

摘要： 利用输入输出不同的变间距采样通过汉克尔变换实现圆对称纯位相片精密化设计,并发展了准梯度下降法及频谱滤波,改进了原有的混合杂化算法.模拟结果表明,考虑到热传导匀滑之后输出振幅分布顶部调制为1.1%,衍射效率为97.2%.

关键词: 纯位相片, 变间距采样, 准梯度下降法, 频谱滤波

Abstract: Numerical Hankel transform for circularly symmetric system at variable sampling intervals in input and optput planes is presented. An improved hybrid algorithm by using quasi Gradient Decent algorithm and spectrum selectivity is applied to the design of pure phase elements (PPE) in uniform illumination. Considering heat conductivity the simulated result shows that 97.2% of the incident beam energy is homogeneously concentrated into the desired focal spot in the target plane, and it fits to the required profile with the top profile error 1.1%.

Key words: PPE, variable sampling intervals, quasi Gradient Decent algorithm, spectrum selectivity

中图分类号:

O443

赵逸琼, 伍源, 周秋桂, 李永平. 变间距采样及准梯度下降法实现光束整形[J]. 计算物理, 2004, 21(1): 10-14.

ZHAO Yi-qiong, WU Yuan, ZHOU Qiu-gui, LI Yong-ping. Shaping by Using Quasi Gradient Decent Algorithm at Variable Sampling Intervals[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2004, 21(1): 10-14.

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