DIFFUSION HOLOGRAM ORIGINAL PLATE AND DIFFUSION HOLOGRAM

摘要

PROBLEM TO BE SOLVED: To provide the diffusion hologram original plate and diffusion hologram which have excellent in-surface distributions of diffusion characteristics. ;SOLUTION: This original plate 44 is formed by arranging in parallel and fixing integrally partial diffusion holograms 41₁...41₄ which have nearly the same in-surface distributions of diffusion characteristics and nearly the same diffusion characteristics. Diffusion holograms obtained by duplicating the original plate by a hologram duplicating method have nearly the same distribution ranges of scattered light at any position and excellent in-surface distribution of diffusion characteristics, so part of the circumference is never invisible even when viewed from a distant circumferential direction.;COPYRIGHT: (C)1998,JPO