Optical diffusion and/or the holographic screen null which has the convex projection which possesses light scattering

摘要

A holographic screen of a rear projection type for use in a projector for transmitting projection light received from a rear end of the projector onto a viewing surface. The holographic screen includes a holographic sheet including a viewing surface for forming the received projection light into an image viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, and a plurality of scattering protrusions formed over the entire viewing surface for scattering the received projection light, and a plurality of light absorbers formed between the plurality of protrusions, for absorbing ambient light incident to the viewing surface. Thus, an image with improved contrast is displayed on a viewing surface of the holographic screen.