COMPUTER-GENERATED HOLOGRAMS IMPROVED BY A GLOBAL ITERATIVE CODING

被引：2

作者：

BERGERON, A ^{[1
]}

ARSENAULT, HH ^{[1
]}

GAUVIN, J ^{[1
]}

GINGRAS, DJ ^{[1
]}

机构：

[1] UNIV LAVAL,COPL,QUEBEC CITY G1K 7P4,QUEBEC,CANADA

来源：

OPTICAL ENGINEERING | 1993年 / 32卷 / 09期

关键词：

COMPUTER-GENERATED HOLOGRAMS; GLOBAL ITERATIVE CODING; SPATIAL LIGHT MODULATORS; NEURAL NETWORKS; PATTERN RECOGNITION;

D O I：

10.1117/12.143908

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A global iterative coding method for computer-generated holograms (CGH) is introduced. The method is based on the iterative correction of a CGH using standard Lee coding. The correction, i.e., the difference between the desired and the obtained reconstruction, is coded and added to the current CGH. The coding and weighting factors are introduced to control the speed of convergence and the SNR. Advantages lie in low computing time and improvement of the object SNR, the neighborhood SNR, and the background SNR. Reducing the standard deviation of the phase of the reconstructed object also results. A slight improvement of the diffraction efficiency is also observed. The comparison is realized using the Lee interferogram method as a reference. This method is tested on binary and complex gray-level objects. Simulation results and optical reconstruction are also presented.

引用

页码：2216 / 2226

页数：11

共 12 条

[1] IMPROVING BINARY COMPUTER HOLOGRAMS [J].