Abstract

Confocal feedback systems can perform analog optical solutions of two-dimensional integral equations. Methods for solution of Fredholm equations by space-variant feedback and of Volterra equations using multiple feedback have been found and experimental results obtained. Two-dimensional problems of this type are difficult and time consuming to solve digitally, but the optical solution is obtained at high speed.

© 1981 Optical Society of America

Confocal feedback systems with space variance, time sampling, and secondary feedback loops

Jack Cederquist and Sing H. Lee
J. Opt. Soc. Am. 71(6) 643-650 (1981)

Coherent optical feedback for the analog solution of partial differential equations

Jack Cederquist and Sing H. Lee
J. Opt. Soc. Am. 70(8) 944-953 (1980)

Tomographic image reconstruction from limited projections using coherent optical feedback

Takuso Sato, Kimio Saski, Yukito Nakamura, Melvin Linzer, and Stephen J. Norton
Appl. Opt. 20(17) 3073-3076 (1981)

Direct algorithm for digital image restoration

N. N. Abdelmalek, T. Kasvand, J. Olmstead, and M. M. Tremblay
Appl. Opt. 20(24) 4227-4233 (1981)

Solution of linear and nonlinear equations by optical methods

George Lewak, Sing H. Lee, and W. Thomas Cathey
Appl. Opt. 23(18) 3144-3148 (1984)