Optical recording medium and novel azaporphyrin compounds
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United States of America Patent
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Nov 29, 2005
Grant Date -
Oct 16, 2003
app pub date -
Dec 26, 2000
filing date -
Dec 28, 1999
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Abstract
An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength λ1 of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the λ1, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n≧1.90 and 0.03≦k≦0.30.
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