LIGHT-DISTRIBUTING PLATE AND ILLUMINATION APPARATUS

摘要

The present invention achieves a light-distributing plate and an illumination apparatus that, in addition to being reduced in height, make it possible to keep one part of the light-distributing plate from becoming excessively bright, even when the intensity of illumination light that is generated by a light source is high. A tabular light-distributing plate 51 that diffuses, toward an outer-circumferential-surface side, illumination light that is received at an incidence part 78 from a light source 23, and that is provided with a plurality of diffusion-obstructing parts 55a, 55b that comprise a recess that is formed in at least one of a front surface 51b and a rear surface 51a or that comprise a through hole that passes between the front surface and the rear surface and that are positioned between the incidence part and the outer circumferential surface.