LIGHT DISTRIBUTION CONTROL MEMBER AND ILLUMINATION DEVICE

摘要

Provided is a light distribution control member and an illumination device making it possible to illuminate a irradiated surface in a rectangular shape while reducing the thickness of a light beam control member in the optical axis direction, to control the illuminance of illumination light as desired at the four corners within a desired range from the center of the irradiated surface, and to obtain a sufficient illuminance relative to the center illuminance. The light distribution control member for controlling the distribution of light emitted from a light-emitting element has a conic body provided with a top part facing the light-emitting element, a side part formed so as to flare from the top part, and a bottom part representing the light exit surface. Two or more pairs of recesses indenting inwards with respect to the conic body and disposed opposite each other across the top part are formed on the side part of the conic body.