Abstract: A light source device according to the present disclosure is a light source device that generates illumination light with which an object is to be irradiated, the light source device including: a plurality of semiconductor light emitting elements configured to emit light having different wavelength bands; and a control unit configured to control a light emission profile of the plurality of semiconductor light emitting elements and drive the plurality of semiconductor light emitting elements, in which the control unit extends the light emission profile in a first direction that is a direction opposite to a direction in which time progresses in a case of increasing an exposure level and shortens the light emission profile from a second direction that is the direction in which time progresses in a case of decreasing the exposure level.

Abstract: A light source device that generates illumination light, the light source device including: a plurality of semiconductor light emitting elements that emit light beams having different wavelength bands; and a control unit that controls a light emission profile of the plurality of semiconductor light emitting elements and drives the plurality of semiconductor light emitting elements, in which the light emission profile includes a strong light emission period in which light emission is performed with a predetermined light intensity and a weak light emission period in which light emission is performed with a light intensity weaker than the predetermined light intensity, and the control unit executes a restoration control process of converting into a light emission amount in the strong light emission period while maintaining a total amount of the light emission amount in the strong light emission period and the light emission amount in the weak light emission period constant.

Abstract: A light amount control unit of an endoscope derives a photometric value in an area of an observation spot corresponding to each of angular ranges of a first light output unit and a second light output unit having different wavelength ranges based on imaging data about the observation spot output from an imaging unit, derives an amount of light from each of the first light output unit and the second light output unit based on the derived photometric value, and causes each of the first light output unit and the second light output unit to output illumination light based on the derived amount of light.

Abstract: An endoscope system includes: a light source that emits a first light; a rotating plate in which a first light transmitting region that allows the first light to pass therethrough, and a second light transmitting region that extracts a second light that is in at least one specific wavelength region from the first light, the first light transmitting region being configured to reduce a difference in amount between the first light that passes through the first light transmitting region and the second light extracted by the second light transmitting region; a rotation drive unit that inserts the first light transmitting region and the second light transmitting region one after the other into an optical path of the first light from the light source by rotating the rotating plate; a shift drive unit that shifts the rotating plate; and a control unit that controls the shift drive unit.