Patent ID: 8905593

Claim:
A luminous flux control member that controls traveling direction of light emitted from a light source, the luminous flux control member comprising: an incident area on which light emitted from the light source is incident; an emission area that emits light that has entered the incident area; and a plurality of projecting sections that are formed in the incident area, have a concentric circular ring shape of which the center is an optical axis when viewed from the optical axis direction, and are arrayed in a radial direction such as to form a serrated shape in a cross-section including the optical axis, wherein the projecting sections are formed such that a first surface disposed on the inner side in the radial direction has a smaller angle in relation to the optical axis than a second surface disposed on the outer side in the radial direction, the second surface functions as a total reflection surface that totally reflects the light that has reached the second surface from the light source in a predetermined traveling direction, when the plurality of projecting sections are classified into an inner area, an intermediate area, and a peripheral area for each position in the radial direction, a first specific projecting section disposed in the inner area is configured such that a planar section that is used to measure the height of the first specific projecting section and is perpendicular to the optical axis is connected to an inner peripheral end of a base end portion and an outer peripheral end of the base end portion of the first specific projecting section, and the projecting sections other than the first specific projecting section, among the plurality of projecting sections, are, in principle, disposed such as to come into contact internally or externally with another projecting section other than the first specific projecting section.