A method for phase visualization and edge enhancement by spatial self-filtering by use of a polarizer sheet in the Fourier plane of an optical processor is described. Light absorbed by the polarizer sheet induces a thermal lens, which, in turn, produces selective action on certain spatial frequencies of the image to be processed. Some experiments that demonstrate the self-filtering action of the proposed system are presented.
© 2005 Optical Society of America
Original Manuscript: July 2, 2004
Revised Manuscript: October 4, 2004
Manuscript Accepted: October 6, 2004
Published: January 1, 2005
José A. Ferrari, Eugenio Garbusi, Erna M. Frins, and Gustavo Píriz, "Spatial self-filtering with polarizer sheets," Appl. Opt. 44, 41-46 (2005)