Patent ID: 8342697

Claim:
A light source unit comprising: a primary light source which emits a light ray of a predetermined wavelength band; a light emitting member having a plurality of segment areas on a base material and in which the plurality of segment areas emit sequentially light rays of different wavelength bands by the light from the primary light source being shone on to the plurality of segment areas; a secondary light source which emits a light ray of a wavelength band which is different from that of the light ray emitted from the primary light source and those of the light rays emitted from the light emitting member; a light guiding optical system which guides the light rays emitted from the light emitting member and the light ray emitted from the secondary light source to the same optical path; and a light source control means which controls the emission of light from the primary light source and the secondary light source individually, wherein the light source control means controls the primary light source and the secondary light source to be turned on so that a period of time is included when the light ray from the primary light source is shone on to a predetermined boundary between the adjacent segment areas of the light emitting body when the secondary light source is turned on.