Patent ID: 9584690
Date: 2017-02-28
CPC Classifications: G02B,H04N

Claim:
1. An illuminating device comprising: a light source; and a reflector configured to reflect light emitted by the light source; and a light guide formed of a light-transmissive member extending along an optical axis of light introduced into the light guide, the light guide being configured so as to reflect the light introduced into the light guide in a predetermined direction, wherein the light guide comprises: an incident surface provided at least at one of end portions of the light guide in a longitudinal direction, and configured to receive light emitted by the light source; an output surface constituting a part of an outer peripheral surface of the light guide extending along the optical axis of the light introduced through the incident surface, and configured to output the light introduced through the incident surface; and a reflecting surface extending along the optical axis so as to oppose the output surface, and including a plurality of reflection patterns that reflect, toward the output surface, the light introduced through the incident surface, the reflector is disposed so as to oppose a region in the outer peripheral surface other than the incident surface, the output surface, and the light guide has the outer peripheral surface that includes a sloped portion formed so as to come closer to the reflector in a direction away from the incident surface in the longitudinal direction.