HOLOGRAPHIC PROJECTION SCREEN WITH BACK-ORIENTED FRESNEL LENS

摘要

PURPOSE: A holographic projection screen comprising rear warping fresnel lens is provided to improve the visibility and brightness of screen and to realize high resolution at a reasonable fabricating cost. CONSTITUTION: A linear Fresnel lens(110) has a lens pattern(111) on a first side receiving the light energy from a light source(14,16,18). A second side of the Fresnel lens is arranged as being faced with the first side. The light energy is output from the second side of the Fresnel lens. A hologram(26) is attached on the second side of the Fresnel lens and controls the dispersion of the light energy output from the second side. The hologram is attached on the Fresnel lens through the lamination process.