| 摘要 |
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; an optical member 2 arranged on a circumference with a predetermined axis as a center, and emitting the illumination light made incident from the emission end 1a from the surface; and a reflective layer 3 provided adjacent to the surface of the inside of the radial direction of the optical member 2, and reflecting the illumination light outward in the radial direction. The optical member 2 includes: a light guide layer 4; and a diffusion layer 5 located at further outside in the radial direction than the diffusion layer 4 and at one end side in a direction along the predetermined axis. In the light guide layer 4, the illumination light enters from the emission end 1a, and the illumination light is guided. The diffusion layer 5 guides the illumination light made incident from the light guide layer 4 while diffusing it. |
