Patent ID: 8518552

Claim:
An optical film comprising: a polymer having a repeating unit represented by Formula (III); and a polymer having a repeating unit represented by Formula (II); wherein in Formula (III), A 1 and B 1 each represents a substituent on the benzene ring, and a 1 and b 1 each represents the number (an integer of 0 to 4) of the corresponding substituents represented by each of A 1 and B 1 , A 1 and B 1 each independently represents hydrogen, halogen, an alkyl group of 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group, R 1 and R 2 each independently represent a straight-chain or branched alkyl group of 1 to 10 carbon atoms or a substituted or unsubstituted aryl group, R 3 to R 6 each independently represent a hydrogen atom, a halogen atom, a straight-chain or branched alkyl group of 1 to 6 carbon atoms, a cycloalkyl group of 5 to 10 carbon atoms, or a substituted or unsubstituted aryl group, provided that at least one of R 3 to R 6 is not a hydrogen atom; wherein in Formula (II), A 2 , D 2 , and E 2 each represent a substituent on the benzene ring, and a 2 , d 2 , and e 2 each represent the number (an integer of 0 to 4) of the corresponding substituents represented by each of A 2 , D 2 , and E 2 , A 2 , D 2 , and E 2 each independently represent hydrogen, halogen, an alkyl group of 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group, X 2 represents a single covalent bond, an unsaturated double bond, an unsaturated triple bond, or at least one atom or group selected from the group consisting of a CH 2 group, a CHR group, a CR 2 group, a C(CZ 3 ) 2 group, a CO group, an O atom, a S atom, an SO 2 group, an Si(CH 2 CH 3 ) 2 group, and an N(CH 3 ) group, wherein R each independently represent a straight-chain or branched alkyl group of 1 to 6 carbon atoms or a substituted or unsubstituted aryl group, Z represents halogen, r 2 represents 1 or 2, and p 2 and q 2 each represent an integer of 1 to 3.