PROBLEM TO BE SOLVED: To provide a light source device suitable for preventing an amount of irradiation light from becoming excessive.SOLUTION: A light source device includes a light source for emitting irradiation light with which to irradiate a subject, fixed dimming means arranged fixed in an optical path of the irradiation light for dimming the irradiation light, movable dimming means arranged so as to be removed from the optical path for dimming the irradiation light, light amount detection means for detecting an amount of the irradiation light emitted from the light source, and dimming control means for removing the movable dimming means from the optical path according to the amount of light detected by the light amount detection means.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】照射光の光量が過剰になることを防止するのに好適な光源装置を提供する。【解決手段】光源装置を、被写体を照射する照射光を射出する光源と、照射光の光路に固定して配置された、照射光を減光する固定減光手段と、光路から抜去可能に配置された、照射光を減光する可動減光手段と、光源から射出された照射光の光量を検出する光量検出手段と、光量検出手段によって検出された光量に応じて、可動減光手段を光路から抜去する減光制御手段と、から構成する。【選択図】図1
