OPN March 1997

Cover Story

Spatial Light Modulators: Processing Light in Real Time

Pierre R. Barbier and Garret Moddel

Improvements in spatial light modulators (SLMs) are expanding their applications. Barbier and Moddel describe how SLMs work and provide insight into the latest SLM applications. more>>

Features

Strategies Toward Sub-0.25 µm Lithography

Bruce W. Smith

Bruce Smith discusses various issues relating to sub-0.25 µm lithography, including source wavelength, illumination, masking, and materials. more>>


Optical Information Processing for Encryption and Security Systems

Bahram Javidi

This article provides a discussion of new optical information processing techniques for encryption, security, and anti-counterfeiting that have been shown to perform well for a variety of problems and applications. more>>


A Different Kind of Kaleidoscope

Douglas S. Goodman

Most kaleidoscopes work by forming multiple reflections, at various orientations, of a pattern at their input surface. Described here is a kaleidoscope, in which the entrance is uniformly illuminated, and a pattern results from changes in polarization produced by the reflections themselves. One form consists of four pieces of front surface mirror combined to give a square internally reflecting tube. more>>

Pulses

This content is not available for issues prior to 2002. Please contact opn@osa.org to request specific articles.

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