LUMINOUS FLUX CONTROL MEMBER, LIGHT EMITTING APPARATUS, AND ILLUMINATING APPARATUS

摘要

A luminous flux control member (200) of the present invention has: a light input surface (210); total reflection surfaces (220), which are formed at positions facing a light emitting element with the light input surface (210) therebetween; two light guide sections (230), which are formed such that respective cross-sectional areas thereof are reduced in the direction to be away from the light input surface (210) and the total reflection surface (220), said light guide sections being formed at facing positions with the light input surface (210) and the total reflection surface (220) therebetween; and two light output surfaces (240), which are formed on the outer surfaces of the two light guide sections (230), respectively.

主权项

1. A light flux controlling member configured to control a distribution of light emitted from a light emitting element, the light flux controlling member comprising:
an incidence surface on which at least part of light emitted from a light emitting element is incident; a total reflection surface formed at a position facing the light emitting element with the incidence surface therebetween, the total reflection surface being configured to reflect part of light incident on the incidence surface in two opposite directions substantially perpendicular to an optical axis of the light emitting element, and to output the other part of the light incident on the incidence surface; two light guiding sections formed at positions facing each other with the incidence surface and the total reflection surface therebetween, the two light guiding sections being configured to guide part of light incident on the incidence surface and light reflected by the total reflection surface in a direction away from the incidence surface and the total reflection surface; two emission surfaces formed on respective external surfaces of the two light guiding sections, the two emission surfaces being configured to output light guided by the light guiding sections; and a diffusing member disposed immediately above a position of the light emitting element in such a manner as to cover at least a part of the total reflection surface, the diffusing member including a plurality of prism rows or a plurality of square pyramids disposed on an external surface or an internal surface of the diffusing member, the prism rows and the square pyramids being configured to diffuse light, wherein the light output from the total reflection surface is refractively transmitted through the diffusing member.