Parallel optical image addition and subtraction in a dynamic photorefractive memory by phase-code multiplexing

被引：38
|
作者：
Denz, C
Dellwig, T
Lembcke, J
Tschudi, T
机构：
[1] Institut fuer Angewandte Physik, Technische Hochschule Darmstadt, D-64289 Darmstadt
来源：
OPTICS LETTERS | 1996年 / 21卷 / 04期
关键词：
D O I：
10.1364/OL.21.000278
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose and demonstrate experimentally a method for utilizing a dynamic phase-encoded photorefractive memory to realize parallel optical addition, subtraction, and inversion operations of stored images. The phase-encoded holographic memory is realized in photorefractive BaTiO3, storing eight images using Walsh-Hadamard binary phase codes and an incremental recording procedure. By subsampling the set of reference beams during the recall operation, the selectivity of the phase address is decreased, allowing one to combine images in such a way that different linear combination of the images can be realized at the output of the memory. (C) 1996 Optical Society of America
引用
收藏
页码：278 / 280
页数：3
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