OPTICAL SHEET

摘要

An optical sheet produced by an injection molding method, having stresses, on the front surfaces of two opposing main planes, of up to 200 kg/cm<2>, and being free from warp or deformation after molded. Each of stresses on the front surfaces of two opposing main planes of the optical sheet is preferably up to 200 kg/cm<2>, and a stress difference between the two main planes up to 20%. The optical sheet is used for a Fresnel lens sheet and a lenticular lens sheet used for a screen sheet of a projection TV and projector, a condensing Fresnel lens sheet, and an emboss sheet.