Abstract

Architectural prototypes and algorithms for performing many simultaneous complex correlations between external data and data stored on optical disks are presented. External data are modulated onto an addressing light beam acoustooptically. Analog correlation outputs are obtained at low bandwidth. Data may be encoded on the disk either digitally, and correlated by using a digital multiplication by analog convolution scheme, or by analog area modulation. Bipolar correlations are shown possible without data biasing when two auxilliary diode lasers are used in a sign determination scheme. Error issues include variations in reflectances of encoded bits and raw disk errors.

© 1992 Optical Society of America

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