Patent ID: 7332257

Claim:
A composition for an optical film comprising a stabilized cyanine dye and a quencher compound, wherein the stabilized cyanine dye comprises a cation and a quencher anion, and the cation is selected from the group consisting of compounds of the following formulae (I) to (III): wherein each of rings A and A′ which are independent of each other, is a benzene ring, a naphthalene ring or a pyridine ring, each of R 1 and R 1 ′ which are independent of each other, is a halogen atom, a nitro group, a cyano group, a C 6-30 aryl group, a C 1-8 alkyl group or a C 1-8 alkoxy group, each of R 2 , R 3 and R 4 which are independent of one another, is a hydrogen atom, a halogen atom, a cyano group, a C 6-30 aryl group, a diphenylamino group or a C 1-8 alkyl group, each of X and X′ which are independent of each other, is an oxygen atom, a sulfur atom, a selenium atom, a propan-2,2-diyl group, a butan-2,2-diyl group, a C 3-6 cycloalkan-1,1-diyl group, —NH—or —NY 1 , —each of Y,Y′ and Y 1 which are independent of one another, is a C 1-30 organic group, and each of r and r′ which are independent of each other, is an integer of from 0 to 2.