Lensless theta decoder
P. Andres, Jorge Ojeda‐Castañeda, J. Ibarra · Annual Meeting Optical Society of America · 1986
The self-imaging phenomenon offers the possibility of implementing simple yet versatile optical processors. For example, it can be used for setting economical interferometers, or simple spectroscopes, and lensless spatial filters, or for performing optical correlations, and for implementing optical synthesizers. We suggest a method based on the Lau effect1 for decoding pictures that are theta-modulated.2