大容量体全息相关器存储时序的改进  

Time schedule improvement for the storage of the large capacity volume holographic correlator

作　　者：瞿宗耀[1] 何树荣[1] 曹良才[1] 何庆声[1] 金国藩[1] 

机构地区：[1]清华大学精密测试技术及仪器国家重点实验室,北京100084

出　　处：《光学技术》2008年第1期52-54,共3页Optical Technique

摘　　要：体全息相关器的存储时序直接影响多通道输出的衍射效率均匀性,进而影响识别率。通过引入约束因子β,对传统的递减曝光时序进行改进,提出约束递减曝光时序,并用此时序在2400幅的存储容量下,实现了衍射效率较均匀的并行相关输出。The exposure time schedule is the essential part of the large capacity volume holographic correlator.It directly influences the uniformity of the diffractive efficiency of output channels,so the recognition rate.A restricted coefficient β is introduced and experimentally determined to improve the original gradually-reduced exposure time schedule.The experiment verified the improvement to the uniformity of the diffractive efficiency of 2400 output channels.

关 键 词：体全息存储 体全息相关器 衍射效率 曝光时序 约束递减曝光 

分 类 号：O438[机械工程—光学工程] TP333.43[理学—光学]