Virginia TechIndebetouw, Guy J.Poon, Ting-Chung2014-04-042014-04-041984-01-01Guy Indebetouw and Ting-Chung Poon, "Incoherent spatial filtering with a scanning heterodyne system," Appl. Opt. 23, 4571-4574 (1984). doi: 10.1364/AO.23.0045710003-6935http://hdl.handle.net/10919/46921Imaging 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.application/pdfenIn CopyrightArticle - Refereedhttp://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-23-24-4571https://doi.org/10.1364/AO.23.004571