Parvathi Murthy Phones & Addresses
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17 Sapphire Dr, Princeton Jct, NJ 08550 (609) 799-5918 (609) 799-5187
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Princeton Junction, NJ
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Trenton, NJ
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Lakewood, NJ
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Middletown, NJ
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Salt Lake City, UT
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17 Sapphire Dr, Princeton Jct, NJ 08550 (609) 672-6548
Work
Position:
Production Occupations
Publications
Us Patents
Polymers And Dye Combinations And Methods For Their Use In Optical Recording
View pageUS Patent:
48645370, Sep 5, 1989
Filed:
Nov 5, 1985
Appl. No.:
6/795219
Inventors:
Josef Michl - Salt Lake City UT
Parvathi S. Murthy - Middletown NJ
Parvathi S. Murthy - Middletown NJ
Assignee:
University of Utah - Salt Lake City UT
International Classification:
G11C 1304
US Classification:
365127
Abstract:
A polymer and dye combination suitable for use in optically recording information. The present invention includes a material which may exhibit the property of birefringence under selected conditions such as when stretched. This birefringence can be relaxed in localized areas by heating the localized areas. Incorporated within the material is a dye. The dye is selected so that it has a high optical density, or absorption maximum, in a specific range. This range may cover, for example, the wavelength of a gallium arsenide laser. Radiation with a wavelength within the selected range is the directed into the material at selected locations. This radiation is converted to heat, which in turn relaxes the birefringence in the localized areas or may cause other physical or chemical changes within the polymer. The localized relaxation of birefringence or other change can then be detected or "read. " This allows information to be optically recorded on the polymer and subsequently detected and used.