ANISOTROPIC DIFFUSING MEDIUM AND PRODUCTION METHOD THEREFOR

摘要

An anisotropic diffusing medium having a resin layer consisting of the curing material of a composition containing a photo-curing compound, wherein an assembly of a plurality of bar-like curing areas is formed in the resin layer, these bar-like curing areas all extend in parallel to a specified direction P, and, when the respective linear transmitting light quantities, corresponding to respective incident directions, of incident lights from all the directions at an arbitrary point on one side of the anisotropic diffusing medium are vector-represented in outgoing directions, with an outgoing point, corresponding to the above arbitrary point, in a space on the other side of the anisotropic medium as a starting point, a curved surface obtained by connecting the tip ends of these vectors forms a bell-shaped curved surface having a symmetrical axis in the specified direction P.