Abstract

One of the useful applications of holography is information conversion. This paper reports on a newly developed automatic character reading system using code-transform holograms for analog-digital (A-D) conversion. Unknown characters are recognized by converting spatial analog character information to spatial digital information. System parameters are sampled out, and important factors such as (1) discrimination, (2) storage capacity, and (3) reading speed, which determine the performance of this system, are discussed.

© 1972 Optical Society of America

Some Aspects of a Large Capacity Holographic Memory

B. Hill
Appl. Opt. 11(1) 182-191 (1972)

Holographic Ultrafiche

D. H. McMahon
Appl. Opt. 11(4) 798-806 (1972)

Holographic memory system for Kanji character generation

Isao Satoh, Makoto Kato, Katsuyuki Fujito, and Fumikazu Tateishi
Appl. Opt. 28(13) 2634-2640 (1989)

Real Time Optical Processing with Bi₁₂SiO₂₀ PROM

Peter Nisenson and Sato Iwasa
Appl. Opt. 11(12) 2760-2767 (1972)

Improved Electrooptic Materials and Fixing Techniques for Holographic Recording

J. J. Amodei, W. Phillips, and D. L. Staebler
Appl. Opt. 11(2) 390-396 (1972)