Browse Prior Art Database

Laser Dissector Recording

IP.com Disclosure Number: IPCOM000094585D
Original Publication Date: 1965-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Brookman, JW: AUTHOR [+2]

Abstract

The apparatus reads densely packed data from a record 10. This is effected by coarse positioning of an image of a portion of the record 10 on the surface of an image dissector tube 11 which selectively scans the selected portion.

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Laser Dissector Recording

The apparatus reads densely packed data from a record 10. This is effected by coarse positioning of an image of a portion of the record 10 on the surface of an image dissector tube 11 which selectively scans the selected portion.

A very bright beam of light from laser 12 is digitally deflected to a desired location of record 10. The deflection is controlled by electro-optical switches, such as electro-optical polarizers and birefringent crystals 13. Beam splitter 14 splits the beam into a plurality of parts. Two parts are directed to two photomultiplier tubes 15 and 16. Each has a grid overlay 17 and 18 to determine X-Y beam position information. The other part of the beam images an enlarged area of densely packed information on the surface of image dissector tube 11 by lens 19.

An electronic servo and monitor control 20 detects the outputs of photomultiplier tubes 15 and 16 to determine when the selected portion of record 10 illuminates image dissector tube 11. Control 20 then controls tube 11 to scan the image, thus providing high resolution readout signals at megabit rates at output 21.

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