System for reading an optical recording of binary numerical data

Details System for reading an optical recording of binary numerical data System for reading an optical recording of binary numerical data

1975-11-26

1977-10-04

Hecker, Stuart N.

Communications: electrical

Digital comparator systems

340173LT, 350 35, G11C 1304, G11C 800

Patent

active

040527069

ABSTRACT:
The invention has for its object a reading arrangement which uses a source functioning by pulses and delay-action dividing optical means which successively ensure the illumination of M storage areas of the recording, each area comprising P bits 0 and 1. Thus, a single reading pulse makes possible the reading, with a mosaic of P photodetectors, of a block which comprises M words of P bits. The invention is particularly applicable to non-destructive optical reading stores, for instance holographic stores.

REFERENCES:
patent: 3403261 (1968-09-01), Bowers et al.
patent: 3407405 (1968-10-01), Hoadley
patent: 3573433 (1971-04-01), Harris
patent: 3765749 (1973-10-01), LaMacchia
patent: 3912391 (1975-10-01), Fleisher et al.
Waterworth, A., 1.5.times.10.sup.8 Bit Random Access Read-Only Holographic Memory, Digest of Technical Papers of Topical Meeting on Optical Storage of Digital Data, Aspen, Colo., 19-21, Mar. 1973, pp. ToA2-1-4.

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