Optical information recording medium
First Claim
1. An optical information recording medium for carrying out recording and reproduction with laser beams which comprises a support having carried thereon at least one methine dye which comprises an azulene nucleus, at least one of the two carbon atoms at the 1 and 3 positions of which is replaced by a chalcogen atom or a nitrogen atom, and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with a 10 π
- electron system of the nucleus.
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Accused Products
Abstract
The present invention relates to an optical information recording medium for carrying out recording, reproduction and erasing with laser beams which comprises a support having carried thereon at least one methine dye which consists of an azulene nucleus, at least one of 10 carbon atoms of which is replaced by chalcogen atom(s) and/or nitrogen atom(s), and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with a 10 π electron system of the nucleus.
Optical information recording media of the invention have adequate recording characteristics having high C/N, and have high stabilities against long-term preservation or against long-time reading.
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Citations
20 Claims
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1. An optical information recording medium for carrying out recording and reproduction with laser beams which comprises a support having carried thereon at least one methine dye which comprises an azulene nucleus, at least one of the two carbon atoms at the 1 and 3 positions of which is replaced by a chalcogen atom or a nitrogen atom, and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with a 10 π
- electron system of the nucleus.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification