Patent ID: 8958165
Filing Date: 2015-02-17
Classification: C07D,C09B,G02B,G11B,Y10T

Abstract:
1. An optical filter comprising at least one cyanine compound of general formula (VI): wherein R R X R Y wherein L represents a single bond or a divalent hydrocarbon group having 1 to 12 carbon atoms, with the proviso that at least one of Y -Q- represents a linking group comprising a polymethine chain optionally containing a cyclic structure, the polymethine chain may have its hydrogen atom replaced by a halogen atom, a cyano group, a hydroxyl group, an alkyl group, an alkoxy group, or an aryl group, of which the alkyl, alkoxy or aryl group may further be substituted with a halogen atom, a cyano group, a hydroxyl group, an alkyl group, an alkoxy group, or an aryl group; An a represents a number of 0 to 4; q represents 1 or 2; and p represents a number necessary to neutralize the electric charge; R adjacent R m represents a number of 0 to 5.