Pupil apodization for increasing data storage density  

作　　者：Vidal F.Canales Pedro J.Valle Jose E.Oti Manuel P.Cagigal 

机构地区：[1]Department of Física Aplicada,University of Cantabria,Los Castros S/N,Santander 39005,Spain [2]AOTEK S.COOP.,Bo San Andrés 19,Arrasate-Mondragón 20500,Spain

出　　处：《Chinese Optics Letters》2009年第8期720-723,共4页中国光学快报（英文版）

基　　金：supported by Ministero de Ciencia y Tecnología under Grant No. AYA 2007-67287

摘　　要：We introduce a technique for increasing density in optical data storage systems. This technique is based on the use of a superresolving filter at the pupil of a confocal readout system. The main characteristic of this confocal readout system is that the light beam traverses twice through the pupil filter. We describe how to analyze the system performance for general filters, but we focus the study on filters with no focus displacement. Although the storage density attainable depends on the filter characteristics, we show that the storage density can be easily duplicated.We introduce a technique for increasing density in optical data storage systems. This technique is based on the use of a superresolving filter at the pupil of a confocal readout system. The main characteristic of this confocal readout system is that the light beam traverses twice through the pupil filter. We describe how to analyze the system performance for general filters, but we focus the study on filters with no focus displacement. Although the storage density attainable depends on the filter characteristics, we show that the storage density can be easily duplicated.

关 键 词：Pupil apodization for increasing data storage density PSF DATA 

分 类 号：TP333[自动化与计算机技术—计算机系统结构] Q954.53[自动化与计算机技术—计算机科学与技术]