| 摘要 |
The present invention relates to photography and, more particularly, to a novel spectrally (optically) sensitized radiation recording photographic element which comprises a cyanine dye of the formula: <IMAGE> wherein L represents a methine group; m represents a positive integer of from 1 to 3, inclusive; Z and Z1 each represents the nonmetallic atoms necessary to complete a cyanine dye heterocyclic ring system containing a 5 or 6 membered heterocyclic nucleus; R and R1 each represents a divalent acyclic or cyclic group; X<+> represents a quaternary ammonium, sulfonium or phosphonium group; Y<-> represents a -SO3<-> or -COO<-> group; and W<-> represents an anion.
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