Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product
Patent
1988-02-26
1990-11-06
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
430270, 430945, 3461351, 428 64, G11B 724, G03C 173, G03C 1735
Patent
active
049685937
ABSTRACT:
The present invention is directed to an optical information recording medium for carrying out recording, readout and erasing with laser beams which comprises a support having carried thereon at least one of the compounds represented by the following general formulae (I), (II), (III) and (IV): ##STR1## wherein X and X' each represents an atomic group necessary for forming a carbon ring or an atomic group necessary for forming a specific heterocyclic ring; L.sup.1 mainly represents a methine group, or a group formed by linking 3 or 5 methine groups in turn to form conjugated double bonds; and Q and Q' each represents an atomic group whereby a conjugated double bond chain is completed; ##STR2## wherein L.sup.1 and Q are as defined in general formula (I); Z represents an atomic group necessary for forming a carbon ring or heterocyclic ring; R.sup.1 to R.sup.3 and E represent various substituents; and M represents an ion, etc.; ##STR3## in the above general formulae (III) and (IV), A represents an atomic group necessary for forming a pyridine, pyrimidine, pyrazine or triazine ring; and L.sup.2 represents a methine group, or a group formed by linking 3 or 5 methine groups in turn to form conjugated double bonds.
Optical information recording media of the invention each have a high C/N and thus adequate recording characteristics, and have a high stability with respect to long-term preservation or long-time reading.
These effects may further be enhanced by using a singlet oxygen quencher.
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Adachi Keiichi
Inagaki Yoshio
Jimbo Yoshihiro
Yabe Masao
Buscher Mark R.
Fuji Photo Film Co. , Ltd.
Michl Paul R.
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