| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical film excellent in moisture resistance and optical characteristics. SOLUTION: The optical film has a near-IR absorbing layer containing a diimmonium dye expressed by a general formula (I) in a transparent resin. In the formula, each of R<SP>1</SP>to R<SP>8</SP>independently represents a hydrogen atom, an alkyl group which may have a substituent, alkenyl group, aryl group, or alkynyl group, X<SP>-</SP>represents an anion expressed by (R<SB>f</SB>SO<SB>2</SB>)<SB>2</SB>N<SP>-</SP>or (R<SB>f</SB>SO<SB>2</SB>)<SB>3</SB>C<SP>-</SP>, and R<SB>f</SB>represents a fluoroalkyl group having a carbon number of 1 to 4. COPYRIGHT: (C)2009,JPO&INPIT
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