LENS SHEET, DIFFUSION PANEL AND TRANSMISSION TYPE SCREEN

摘要

PURPOSE: To provide a bright and sharp image with little reflection of external light by forming an anti-reflection film of thickness different from an optical interference theory on a lens sheet member provided with a definite or indefinite shape. CONSTITUTION: An anti-reflection film 5 is provided on the front surface of a lenticular lens 4 with a prescribed thickness. The anti-reflection film 5 is composed of by applying a member having refractive index lower than that of a material composing a lenticular lens sheet 7, e.g. a resin member made of polymer on the surface so that the film thickness becomes 2λ/4n-5λ/4n. Consequently, a lens sheet for a transmission type screen or a diffusion panel exhibits the anti-reflection effect larger than before. Namely, the anti-reflection effect is larger compared with the film thickness based on the optical interference theory, the performance of high transmissivity is obtained and they are easily and cheaply worked/produced by means of a conventional device.