A Fabry-Perot etalon placed in the object plane of a coherent optical processing system can be used as a variable bandpass preprocessing filter. Use of this filter leads to improved correlation signals in a matched spatial filter system. Experimental results are shown and compared with results obtained by two other preprocessing methods.
© 1981 Optical Society of America
G. Indebetouw and S. K. Case, "Fabry-Perot filters used for optical preprocessing," Appl. Opt. 20, 1715-1718 (1981)