PROBLEM TO BE SOLVED: To provide a luminaire which can illuminate a wide angle range of 180° or more, and which can be suitably applied to a small-diameter endoscope.SOLUTION: A luminaire 100 is provided including: a light emitting part 1 having an emission end 1a for emitting illumination light a diffusion layer 2 arranged on a circumference with a predetermined axis as a center, guiding the illumination light made incident from the emission end 1a while diffusing it, and emitting it from the surface and a reflective layer 3 provided adjacent to the surface of the inside of the radial direction of the diffusion layer 2, and reflecting the illumination light outward in the radial direction.COPYRIGHT: (C)2015,JPO&INPIT
