Patent ID: 6476893
Filing Date: 2002-11-05
Classification: B32B,G02B

Abstract:
A multi-layer phase retarder comprising:a first phase retarder satisfying 1.05&lE;&agr;<1.3 and &bgr;&lE;1; and a second phase retarder being laminated on said first phase retarder and satisfying 11, wherein a retardation in a normal direction by a light beam of a 400 nm wavelength is R1, a retardation in the normal direction by a light beam of a 550 nm is R2, a retardation in a perpendicular direction in a state tilted by 40 degrees with respect to the normal direction with a slow axis as a rotation axis is R3, and R1/R2 is &agr; and R3/R2 is &bgr;.