基于遗传算法的超分辨多元环形滤光片设计

Design of the superresolution multiple annular filters based on the genetic algorithm

本文研究利用光学超分辨技术提高光盘存储密度。给出了一种可以达到衍射超分辨力的多元环形滤光片的设计结果。介绍了该多元环形滤光片的理论设计方法。之后用遗传算法设计了多组多元环形滤光片的结构参数,模拟结果显示设计的环形滤光片能使横向的半峰全宽半径值减小30%,达到提高信息存储密度的目的。另一方面该环形滤光片能使焦深不变或变长,减小了在记录过程中因为光盘的微小波动而引起的记录信息的错误率。

The design of the multiple annular filters with superresolution is proposed based on the technology of optical superresolution. Firstly we introduce a kind of multiple annular filters that can fulfill the superresolution. We design several kinds of filters based on the genetic algorithm, and the simulations demonstrate that the filters enabled the FWHM decreases 30% on transverse direction, which helps to realize the aim of improving the density of information storage. On the other hand, they also make the depth of focus longer. Therefore it can avoid the mistake in the process of recording/reading the information due to the small undulation of the optical disk.