| 摘要 |
PURPOSE: To provide a screen for projection which not only makes it possible to obtain a sharp image without being influenced by a projection environment, but also can improve visual field characteristics. CONSTITUTION: A plurality of projection parts 11A are formed as a light diffusion part on the surface of a substrate 11. On the substrate 11, an optical thin film 12 is formed and on the surface of the optical thin film 12, projection parts 12A in the same shape with the projection parts 11A on the substrate are formed. When external light is incident on the optical thin film 12 together with primary-color wavelength range light, the optical thin film 12 reflects only the primary-color light wavelength range light, and at least visible wavelength range light of the external light is absorbed by the substrate 11. Here, when the primary-color wavelength range light is incident on the optical thin film 12, for example, at right angles, the primary-color wavelength range light has a specified angle Θ of incidence to the optical thin film 12 through the projection parts 12A of the optical thin film 12 and is scattered as diffused reflected light at a reflection angle 2Θ at a specified ratio, so the visual field angle of the screen increases.
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