Portable holographic information retrieval system with an active

Details Portable holographic information retrieval system with an active Portable holographic information retrieval system with an active

1975-03-27

1976-08-17

Stern, Ronald J.

Optics: image projectors

Plural projection paths with single light source

350160LC, 353 74, G03H 130, G03H 122

Patent

active

039750809

ABSTRACT:
A portable holographic information retrieval system is described in which individual holograms each of which contains the alphanumeric information from an individual page of a book, are reconstructed on a rear-illuminated viewing screen. The individual holograms are contained on a permanent transparency as a matrix, the holograms of successive pages of a book being arranged in a sequential manner. The entire matrix of individual page holograms is contained on a transparency which is approximately equal in size to a standard 35 millimeter photographic slide. The reconstruction apparatus has the rear-illuminated viewing screen collapsibly mounted to a system housing. The housing includes a small source of a collimated beam of light for illuminating a selected "page" in the transparency. The transparency is mounted on a carriage which is capable of being traversed relative to the illuminating collimated beam of light so that an individual page hologram may be reconstructed by having a real image formed on the viewing screen. When collapsed for storage, the portable retrieval system is approximately the size of a standard volume.

REFERENCES:
patent: 3234848 (1966-02-01), Stoothoff
patent: 3592527 (1971-07-01), Conners
patent: 3612640 (1971-10-01), Kogelnik
patent: 3619026 (1971-11-01), Cindrich
patent: 3675983 (1972-07-01), LaMacchia
patent: 3870411 (1975-03-01), Schwartz et al.
Gamblin, IBM Technical Disclosure Bulletin, vol. 11, No. 11, Apr., 1969, pp. 1392-1393.

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