| 摘要 |
PROBLEM TO BE SOLVED: To provide a high performance polarizer compatible with three elementary colors of a color liquid crystal projector, and good in brightness, polarization performance, durability and light resistance.SOLUTION: There are provided an azo compound represented by the formula (2) and a salt thereof. In the formula (2), A represents a phenyl group and the like, at least one of Rand Rrepresents a sulfone group and the like, other represents a hydrogen atom, a lower alkyl group and the like and X represents an amino group which may have a substituent and the like. |
