Abstract

Coherent optical noise can be suppressed by sending the desired signal through a number of channels and combining the result at the output. Channels coded by means of spatial frequency are particularly convenient for optical processing systems and offer some advantages additional to noise reduction. The mechanism of noise reduction is described for such spatial frequency diversity systems, and some experiments are described that illustrate noise reduction and multiple filtering possibilities of this technique.

© 1973 Optical Society of America

Speckle Reduction by Simulation of Partially Coherent Object Illumination in Holography

Raoul F. van Ligten
Appl. Opt. 12(2) 255-265 (1973)

Speckle Reduction in Holography by Means of Random Spatial Sampling

F. T. S. Yu and E. Y. Wang
Appl. Opt. 12(7) 1656-1659 (1973)

Three Methods of Information Assessment for Optical Data Processing

Jean-Charles Viénot, Jacques Duvernoy, Gilbert Tribillon, and Jean-Lou is Tribillon
Appl. Opt. 12(5) 950-960 (1973)

Noise Suppression in Coherent Imaging

Juris Upatnieks and Robert W. Lewis
Appl. Opt. 12(9) 2161-2166 (1973)

Spatial Filtering for Noise Reduction in a Multirecording Telecine System

Masahide Yoneyama
Appl. Opt. 12(11) 2721-2731 (1973)