Patent ID: 8130446
Filing Date: 2012-03-06
Classification: G02B,G03B

Abstract:
1. An optical deflecting sheet for use in a transmission type screen that emits imaging light projected from an incident side to an emergent side, comprising: a highly rigid substrate layer with a light-transmissibility and a high rigidity; and two or more layers laminated on the highly rigid substrate layer, the layers including at least a pair of anti-scattering layers disposed on opposite sides of the highly rigid substrate layer for preventing scattering of the highly rigid substrate layer; wherein at least one layer of the two or more layers includes an optical deflecting element that deflects imaging light by refracting or reflecting the imaging light; wherein the optical deflecting element is a prism part formed by arranging a plurality of unit prisms each having an incident surface on which light is incident and a total reflecting surface for reflecting at least a part of light incident on the incident surface; wherein at least one layer of the two or more layers has a diffusing part that diffuses light, and wherein the highly rigid substrate layer is formed of glass or translucent ceramic.