METHOD FOR INSPECTING OPTICAL FILM

摘要

Provided is a method for correctly inspecting defects of an optical film which includes a first liquid crystal film wherein a liquid crystal is aligned in hybrid nematic orientation. A defect inspecting element irradiates an optical film with light through a first polarization plate from a light source, and is composed of a second liquid crystal film and a second polarization plate. In the second liquid crystal film, liquid crystal is aligned in hybrid nematic orientation to the opposite side to the light source with respect to the optical film. The defect inspecting element is arranged so that the second liquid crystal film side is adjacent to the optical film side. The optical film is inspected by tilting the defect inspecting element from the optical film.