Browse Prior Art Database

Display Device Using Laser Beams

IP.com Disclosure Number: IPCOM000095857D
Original Publication Date: 1964-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Roshon, DD: AUTHOR [+2]

Abstract

White photographic paper 1 bearing an emulsion 2 having a relatively high degree of energy absorption can be used as an information display device. This is achieved by directing a laser beam 3 against the side la of the paper opposite the emulsion 2, the emulsion side 2 being exposed to the observer.

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Display Device Using Laser Beams

White photographic paper 1 bearing an emulsion 2 having a relatively high degree of energy absorption can be used as an information display device. This is achieved by directing a laser beam 3 against the side la of the paper opposite the emulsion 2, the emulsion side 2 being exposed to the observer.

In operation, the beam 3, directed against the paper, passes through it without damage to the paper which has a low degree of energy absorption. Beam 3 causes burning or evaporation of the emulsion 2, which has a relatively high degree of energy absorption, in the area impinged by the beam. The emulsion removed exposes the white surface of the paper, thus rendering that portion readable or displayable to the observer.

The type of character of information that can be so displayed can be achieved in the manner described on Page 224 of this IBM Technical Disclosure Bulletin, "Printing by Means of a Laser Beam" by Roshon, Jr., and Young.

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