Patent ID: 7508474

Claim:
A process for fabrication of a laminated retardation layer obtained by lamination of a retardation layer having positive index anisotropy and an optical axis in a layer plane and a retardation layer having negative index anisotropy and an optical axis in a normal direction to a layer plane, wherein a retardation layer having inverse chromatic dispersion that causes retardation defined by an optical path difference between extraordinary light and ordinary light to become small as wavelength becomes short is used as said retardation layer having positive index anisotropy and an optical axis in a layer plane, and a retardation layer having normal chromatic dispersion that causes retardation defined by an optical path difference between extraordinary light and ordinary light to become large as wavelength becomes short is used as said retardation layer having negative index anisotropy and an optical axis in a normal direction to a layer plane, wherein: a stretched polymer film having said inverse chromatic dispersion is used as a substrate, and a polymerizable liquid crystal layer is coated and oriented on one surface of said substrate for polymerization, thereby forming said polymerizable liquid crystal layer having said normal chromatic dispersion into a coating layer.