The Fourier transforming properties of coherent imaging systems are well known and thoroughly developed. Optical spatial filtering techniques for coherent imaging systems are also a well developed field of study. Most of the advances in spatial filtering techniques were developed for systems with a known set of input characteristics. Once these filters were developed, they were static and unable to change wih a new set of inputs exhibiting a different set of characteristics. This paper will present the theoretical basis and desiy of an adaptive coherent imaging system using a two-dimensional spatial light modulator (5124) in the frequency plane. A computer controller is used as a feedback loop from the output plane back to the 5124. The filter implemented by the SLM is developed by simulated annealing. This iterative process enables the filter to adapt to a variety of inputs and automatically optimize given sufficient iterations. This paper will also present feasible applications of this technique in image processing and pattern recognition.

Date Published: 27 December 1990
PDF: 6 pages
Proc. SPIE 1347, Optical Information Processing Systems and Architectures II, (27 December 1990); doi: 10.1117/12.23436

Published in SPIE Proceedings Vol. 1347:
Optical Information Processing Systems and Architectures II
Bahram Javidi, Editor(s)