Defect inspection method for laminated optical film, optical film defect inspection method, and laminated optical film manufacturing method

摘要

According to one embodiment of the present invention, a method for inspecting a defect of a laminated optical film includes: a first inspection step for inspecting a defect of an optical film 11; a step for forming laminated optical films 10A, 10B by adhering a protection film 12 and an adhesive material 13 to the optical film 11; a first marking step for performing marking (of a mark 30) to the laminated optical film 10A corresponding to a defect 20 detected in the first inspection step; a second inspection step for inspecting a defect of the laminated optical film 10B; and a second marking step for performing marking (of a mark 31) to the laminated optical film 10B corresponding to a defect 21 detected in the second inspection step. In the second inspection step, the mark 30 marked in the first marking step is not detected.