Patent ID: 8964111
Filing Date: 2015-02-24
Classification: F21V,G03B,H04N

Abstract:
1. An illumination apparatus comprising: a light source; and a reflector unit to reflect a light flux from the light source, wherein the reflector unit comprises a first reflector and a second reflector whose relative positions on an illumination axis are changeable to change an illumination angle of the illumination apparatus, wherein, when the illumination angle is a first illumination angle, the second reflector is disposed inside the first reflector, and the light flux entering the reflector unit from the light source is reflected by the second reflector to exit from the reflector unit, wherein, when the illumination angle is a second illumination angle smaller than the first illumination angle, the first reflector is disposed further on a light exit side than the second reflector, and the light flux entering the reflector unit from the light source is reflected by at least one of the first and second reflectors to exit from the reflector unit, and wherein a distance on the illumination axis between the light source and the second reflector when the illumination angle is the second illumination angle is shorter than that when the illumination angle is the first illumination angle.