Optical recording elements containing mixtures of metallized carbamoylazo and cyanine dyes
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United States of America Patent
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Oct 13, 1998
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N/A
app pub date -
Jun 25, 1997
filing date -
Jun 25, 1997
priority date (Note) -
Expired
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Abstract
An optical recording element having a transparent substrate and on the surface of said substrate, a recording layer and a light reflecting layer. The recording layer comprises (i) a metallized carbamoylazo dye having an azo group linking a substituted 3-hydroxypyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has a carbamoyl substituent ortho to the azo group and (ii) a cyanine dye. The unrecorded recording layer has a refractive index, at a selected wavelength from 400 to 660 nm, comprising a real part (n) greater than 1.8 and an imaginary part (k) less than 0.2.
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