Imaging systems with two pupils in the receiving optics have been used to synthesize bipolar point spread functions in incoherent image processing. We describe a two-pupil system using a scanning illumination technique and compare its attributes with more conventional techniques. Experimental examples using two-pupil interaction and an acoustooptic frequency offset for the direct 2-D bandpass filtering of diffusely reflecting objects are presented.
© 1984 Optical Society of America
Guy Indebetouw and Ting-Chung Poon, "Incoherent spatial filtering with a scanning heterodyne system," Appl. Opt. 23, 4571-4574 (1984)