VAPOR DEPOSITION METHOD TO CIRCULAR FRESNEL LENS SHEET AND METHOD FOR MANUFACTURING REFLECTANCE SCREEN

摘要

PROBLEM TO BE SOLVED: To provide a vapor deposition method to a circular Fresnel lens sheet which can evaporate a light reflecting material onto a lens surface while suppressing vapor deposition to a non-lens surface as much as possible, and to provide a method for manufacturing a reflectance screen.SOLUTION: The vapor deposition method to a circular Fresnel lens sheet which evaporates the light reflecting material onto the lens surface of a circular Fresnel lens sheet 11 in which a plurality of unit lenses including the lens surfaces and the non-lens surfaces are arranged at one surface thereof, includes: a bending step of bending the circular Fresnel lens sheet so as to render one surface thereof concave; and a vapor deposition step of evaporating the light reflecting material to the concave surface of the circular Fresnel lens sheet from a vapor deposition source 62 disposed on a side of the concave surface of the bent circular Fresnel lens sheet.