The Design of Phase-Only Filters for Optical Correlations
Abstract
In 1984-1985 the author formulated the design of phase-only filters for optical correlators as a complicated nonlinear nondifferentiable optimization question in a very large number of variables. The first objective of this program was to find effective mathematical tools for the solution of this class of optimization problems and to implement them in computer codes. The phase-only filters designed by the techniques developed during the course of this program can be packed with a great deal of information, give good target recognition in the presence of large amounts of additive zero mean Gaussian noise, and objectively perform up to two orders of magnitude better in target recognition and discrimination than filters designed by other techniques. These desirable characteristics continue to hold even after the phase-only filters have been optimally discretized for implementation in actual devices. The second goal of the program was to use the mathematical tools and computer codes developed herein for phase-only filter design when a warm target resides in a warm background and the average temperature of the target and the average temperature of the background are close.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1990
- Accession Number
- ADA225641
Entities
People
- Robert R. Kallman
Organizations
- University of North Texas