Opto-electronic memory system

Details Opto-electronic memory system Opto-electronic memory system

1994-07-19

1995-05-02

Popek, Joseph A.

Static information storage and retrieval

Radiant energy

Liquid crystal

365110, 365112, 365 64, 235454, 235491, G11C 1304, G11C 1142

Patent

active

054125952

ABSTRACT:
An opto-electronic memory system comprises a memory element (14) in which information is stored in an array of optically readable memory locations (17) and reading means comprising an electro-optic, e.g. liquid crystal, shutter arrangement (10) which is operable to scan the memory element with reading light and an array of linear light sensitive elements (18) disposed adjacent the output side of the shutter arrangement and extending in the scan direction, the light sensitive element array defining a reading surface remote from the shutter arrangement (10) on which the memory element (14) is disposed with the memory locations (17) in close proximity to the light sensitive elements (18) and being operable in a contact sensing mode to sense reading light reflected from the memory locations of the memory element according to the reflectance characteristics of the memory locations.

REFERENCES:
patent: 4644406 (1987-02-01), Nishigaki et al.
patent: 4691243 (1987-09-01), Cannella et al.
patent: 5262980 (1993-11-01), Shannon

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