Browse Prior Art Database

Optical Memory

IP.com Disclosure Number: IPCOM000091543D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Harris, TJ: AUTHOR

Abstract

Redundant storing of information is performed by this apparatus using lens arrays for imaging. The readout efficiency of the stored information is substantially increased when compared with that obtained from holography.

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Optical Memory

Redundant storing of information is performed by this apparatus using lens arrays for imaging. The readout efficiency of the stored information is substantially increased when compared with that obtained from holography.

Information is first recorded as discrete spots on a large mask. The latter is then illuminated through a scatterer and the information imaged by a fly's eye lens on a photographic emulsion. Each lens in the system records every spot on the mask so that the information is redundantly stored.

Readout of the information is effected by taking the photographic positive of the recorded information and illuminating it through a scatterer. Imaging of the information is performed by using a fly's eye lens identical to the one used in recording. The information is imaged as the discrete spots for detection.

A system for recording the information has photographic emulsion 1 positioned behind a large fly's eye lens array or array of fly's eye lens 2. Shutter system 3 with one shutter per fly's eye lens array is located in front of lens 2. Mask 4 contains the information and is located a predetermined distance from the emulsion. Illumination 5 is supplied to mask 4 through scatterer 6. By using one information mask for each area of the emulsion as determined by the shutter area, redundant information storage is effected in each area of the emulsion in sequential manner.

Readout is performed by employing a bank of light sources 7. These are arr...