Large holographic memory with plural overlapping detector arrays

Details Large holographic memory with plural overlapping detector arrays Large holographic memory with plural overlapping detector arrays

1974-03-12

1976-04-06

Stern, Ronald J.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250209, 250550, 340173LM, 350 35, G03H 130

Patent

active

039492354

ABSTRACT:
Relatively large hologram storage plates, e.g., those storing a large number of discrete entries such as character definitions for a large character set, comprise an array of mini-holograms arranged in different memory plate sections.
A different photodiode array is associated with each hologram plate section (for efficiency, some elements of different diode arrays may be common). When the stored contents of any mini-hologram are interrogated by a coherent light beam, the stored information is derived via the associated photodiode array and converged (as by OR logic) to memory output terminals.

REFERENCES:
patent: 3542448 (1970-11-01), Reynolds et al.
patent: 3573433 (1971-04-01), Harris
patent: 3576545 (1971-04-01), Meilleroux
patent: 3758187 (1973-09-01), Thomas et al.
patent: 3832565 (1974-08-01), Graf et al.

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