Patent ID: 7850801

Claim:
A layered film fabrication method comprising the steps of fabricating a layered film by layering at least a polarizing plate and an optical compensation layer, and performing defect inspection of the fabricated layered film; wherein the defect inspection step includes the steps of irradiating a light on the layered film from a light source arranged on the polarizing plate layered side of the layered film, imaging a transmitted light image of the layered film by an imaging unit arranged on the optical compensation layer side of the layered film, and detecting a defect existing in the layered film based on the transmitted light image imaged by the imaging unit; and the imaging by the imaging unit is performed via an inspection polarization filter arranged adjacent to the imaging unit on a light path between the light source and the imaging unit, and an inspection retardation filter arranged between the inspection polarization filter and the layered film on the light path between the light source and the imaging unit; wherein the inspection retardation filter cancels the retardation of the optical compensation layer.