FRESNEL LENS SHEET

摘要

PURPOSE: To provide an excellent video to an observer by developing a total reflection type Fresnel lens which prevents trouble such as a double image(ghost) caused by light 101 which becomes stray light because a part of the light made incident from the 1st surface 44 of a 1st prism group 43 is not totally reflected on a 2nd surface(total reflection surface) 45 from occurring on a side near to Fresnel center in a transmission type screen using the total reflection Fresnel lens. CONSTITUTION: The light which is made incident from a 1st surface and becomes the stray light going toward a surface on an observation side because it is not totally reflected on the 2nd surface is emitted at a large angle to the normal of the surface of the Fresnel lens sheet on the observation side by a 2nd prism group formed on the surface of the observation side.