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高速高精度体全息光学相关器

High-Speed and High-Accuracy Volume Holographic Optical Correlator

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摘要

体全息光学相关器基于体光栅的布拉格选择性,在记录介质的共同体积中利用角度复用存储多幅图像。相关计算时,输入一幅图像可以并行输出所有的相关点,每个相关点的强度代表输入图像与对应库图像之间的内积值。分析了提高体全息光学相关器运算精度和速度的关键技术。总结了近年来采用散斑调制技术降低相关通道串扰,采用二维随机交错方法消除图案依赖行为,采用多样本并行估计方法提高并行运算精度,采用读写分离结构实观系统小型化集成等体全息光学相关器技术方面的研究进展。目前体全息光学相关器已经实现超过7500通道的并行运算能力,运算速度达到138 GHz。系统在遥感图像匹配、指纹识别等领域的成功应用证明了其高速高精度运算能力。

Abstract

The volume holographic correlator (VHC) can store multiple images in the common volume of the storage medium by angular multiplexing based on the Bragg selectivity of volume gratings. During the correlation, all the correlation results between the stored images and the input search argument can be simultaneously got. Each correlation result is represented by the intensity of the corresponding correlation spot. The key technologies and constraint factors of the practical utilization of the VHC are analyzed. The research progresses in suppressing the channel crosstalk by speckle modulation, eliminating the impact of pattern dependent behavior, improving the processing accuracy by multi-sample parallel estimation, and system integration of the read-only VHC are summarized. Parallel processing ability with more than 7500 channels and processing speed up to 138 GHz are achieved in the current portable VHC system. The successful applications in remote sensing image matching and biometric recognition have proved the high speed high accuracy abilities of the system.

Newport宣传-MKS新实验室计划
补充资料

中图分类号:O438.1

DOI:10.3788/cjl201441.0209005

所属栏目:全息与信息处理

基金项目:国家973计划(2009CB724007)、国家自然科学基金(61177001,61275013,60677037)

收稿日期:2013-10-10

修改稿日期:2013-11-20

网络出版日期:--

作者单位    点击查看

易瑶:清华大学精密仪器系精密测试技术与仪器国家重点实验室, 北京 100084
曹良才:清华大学精密仪器系精密测试技术与仪器国家重点实验室, 北京 100084
郑天祥:清华大学精密仪器系精密测试技术与仪器国家重点实验室, 北京 100084
赵瑱:清华大学精密仪器系精密测试技术与仪器国家重点实验室, 北京 100084
何庆声:清华大学精密仪器系精密测试技术与仪器国家重点实验室, 北京 100084
金国藩:清华大学精密仪器系精密测试技术与仪器国家重点实验室, 北京 100084

联系人作者:易瑶(yiy07@mails.tsinghua.edu.cn)

备注:易瑶(1987—),男,博士研究生,主要从事体全息光学相关器、光学指纹识别等方面的研究。

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引用该论文

Yi Yao,Cao Liangcai,Zheng Tianxiang,Zhao Tian,He Qingsheng,Jin Guofan. High-Speed and High-Accuracy Volume Holographic Optical Correlator[J]. Chinese Journal of Lasers, 2014, 41(2): 0209005

易瑶,曹良才,郑天祥,赵瑱,何庆声,金国藩. 高速高精度体全息光学相关器[J]. 中国激光, 2014, 41(2): 0209005

被引情况

【1】洪雪婷,钱义先. 高精度光电混合联合变换相关的亚像元像移测量. 光学学报, 2015, 35(2): 212001--1

【2】赵融生,陈向宁,陈建彪,甘世奇. 平面反射镜组在光学相关器中的应用. 光学学报, 2015, 35(10): 1023003--1

【3】周亮,喻珺,杨拓,朱腾飞,李雄超,邹阳,唐少拓,罗统政,程冠晓,徐平. 匹配滤波识别相关峰的分析与实验判别. 光学学报, 2016, 36(9): 907001--1

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