| abstract |
The present invention relates to optical articles and optical filtering coatings comprising at least one absorbing dye comprising one of the groups of formulae of formulae (I), (II), (III) and (IV), wherein R represents an aryl or alkyi group, and the groups of formulae (I), (II), (III) and (IV) have at least one carbon atom substituted with a group chosen from —OH, —CN, bromo, —NO 2 , alkoxy, aryloxy, —COOH, —CHO, —COalkyl, —COaryl, haloalkyl, —SH, —S-alkyl, —S-aryl, —SO 2 alkyl, —OSO 2 alkyl, —SO 2 aryl, —OSO 2 aryl and sulfonamide, or have at least two carbon atoms substituted with a chloro group. |