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Browse Prior Art Database

Sensing Of Phosphorescent Record Media

IP.com Disclosure Number: IPCOM000097122D
Original Publication Date: 1962-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Lasky, DJ: AUTHOR

Abstract

It is possible to increase the contrast between record media and records such as marks on the record media, thereby rendering the sensing of such marks easier. This is effected by coating the surface of a record media with a phosphorescent material which emits a glow in the visible portion of the spectrum when exposed to invisible ultraviolet radiation.

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Sensing Of Phosphorescent Record Media

It is possible to increase the contrast between record media and records such as marks on the record media, thereby rendering the sensing of such marks easier. This is effected by coating the surface of a record media with a phosphorescent material which emits a glow in the visible portion of the spectrum when exposed to invisible ultraviolet radiation.

By illuminating record media thus treated with appropriate wave lengths of radiation, the reflectance during a mark sensing operation is enhanced considerably.

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