Projection screen and manufacturing method thereof

摘要

A projection screen and a method for manufacturing the same providing clear images regardless of the brightness of the environment where the projection screen is used. A projection screen according to the present invention is a projection screen (1) for displaying an image by projecting light from a light source (11). The projection screen (1) includes an optical thin film (3) composed of dielectric multilayers having high reflectance for light in particular wavelength ranges and high transmittance for at least visible light except the light in the particular wavelength ranges. The thickness of each of the dielectric multilayers composing the optical thin film (3) is determined by simulation based on a matrix method. With the thus constructed projection screen of the invention, the optical thin film (3) serves as so-called a band-pass filter. More specifically, the optical thin film (3) functions as a band-pass filter which reflects light of the particular wavelengths and substantially transmits the light except the light of the particular wavelengths, thereby separating incident light.