| 摘要 |
An infrared absorbing composition is disclosed, which contains at least one compound selected from compounds represented by formula (I) <IMAGE> (I) Compounds represented by formula (II) <IMAGE> (II) and compounds represented by formula (III) <IMAGE> (III) wherein R1, R2, R3, R4, R5, R10, R11, R12, R13, R14, R17, R18, R19, R20 and R21, which may be the same or different, each represents a halogen atom, a hydrogen atom, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group which is bonded to the carbon atom of the benzene ring either directly or via a divalent linking group, or any pair of R1 to R5, R10 to R14, R17 to R21 having adjacent positions on the same ring combine to form a substituted or unsubstituted ring; R6 and R7, which may be the same or different, each represents an alkyl group or a substituted or unsubstituted aryl group; and R8, R9, R15, R16, R22 and R23, which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a cyano group; or R8 and R9, R15 and R16, or R22 and R23 combine to form a substituted or unsubstituted ring, which may be condensed with one or more additional rings or ring systems which may be further substituted with substituents. The composition selectively absorbs far to near infrared rays having wavelengths of 600 nm or more and are useful as an optical filter. |
