Interference Filters As Nonlinear Decision-Making Elements for Three-Spot Pattern Recognition and Associative Memories
Resource
Applied Optics, v.27 p.1715
Journal
Applied Optics
Journal Volume
27
Journal Issue
9
Pages
1715-1720
Date Issued
1988
Date
1988
Author(s)
Esch, V. C.
Feinleib, Richard E.
Zhang, L.
Jin, Ruxiang
Chou, H. M.
Sprague, Robert W.
MacLeod, Hugh Angus M.
Khitrova, Galina
Gibbs, Hyatt M.
Wagner, Kelvin H.
Psaltis, Demetri
Abstract
Simple patterns consisting of three spots (V and T) have been recognized by dividing, shifting, and recombining beams onto bistable ZnS interference filters. This experiment demonstrates AND-gate operation, cascading, and a moderate amount of parallelism, but a laser power of several watts was required and the response times were several milliseconds. An associative memory for fingerprint identification has been constructed using a VanderLugt correlator and an interference filter as a reflective thresholding device. © 1988 Optical Society of America.
SDGs
Type
letter