Retarder and circular polarizer

摘要: A retarder comprising a substrate having longitudinal direction and first second optically anisotropic layers respectively formed of composition rod-like liquid-crystalline compound, in which the molecules are aligned homogeneously. The layer substantially generates phase difference π at 550 nm, π/2 nm. An in-plane slow axis cross +30 degrees, an −30 60 degrees. circular polarizer linear film transparent inclined 45 degrees relative to is also disclosed.