Patent ID: 6519016
Filing Date: 2003-02-11
Classification: G02B,G02F

Abstract:
A phase retarder which comprises an optically anisotropic layer A essentially giving the phase retardation of &pgr; at wavelength of 550 nm and an optically anisotropic layer B essentially giving the phase retardation of &pgr;/2 at wavelength of 550 nm, said layers A and B being laminated so that the retarder has such an optical characteristic that a retardation value per wavelength is within the range of 0.2 to 0.3 at each wavelength of 450 nm, 550 nm and 650 nm, wherein the total thickness of the optically anisotropic layers A and B is within the range of 500 nm to 20 &mgr;m.