LIGHT BEAM CONTROL MEMBER, LIGHT-EMITTING DEVICE, AND ILLUMINATION DEVICE

摘要

A light beam control member (120) according to the present invention comprises: an incidence surface (121) including a first incidence surface (132) arranged spaced apart from a center axis and surrounding the center axis, and a second incidence surface (133) arranged by surrounding the first incidence surface; an upper total reflection surface (122) arranged opposite the incidence surface and gradually increasing distance away from the center axis upward along the center axis, and causing the light incident on the incidence surface to reflect in a direction away from the center axis; a lower total reflection surface (123) arranged between the center axis and the first incidence surface and surrounding the center axis, and causing part of the light incident on the first incidence surface to reflect toward the upper total reflection surface; and an emission surface (124) arranged outside the upper total reflection surface and surrounding the center axis, and causing the light reflected from the upper total reflection surface to be emitted to the outside.