PROBLEM TO BE SOLVED: To provide an endoscope system that completely turns off and on illumination lights, acquires an image to be observed for each of the illumination lights, and makes the inter-image signal ratio between individual images of the plurality images consistent.SOLUTION: The endoscope system includes: a plurality of light sources each emitting light of a different wavelength； photodetectors provided respectively for the plurality of light sources and receiving a portion of light of the respective light sources to obtain information of the amount of light emission of the respective light sources； an image acquisition unit using at least first illumination light and second illumination light, which are composed of light emitted from at least one light source of the plurality of light sources, to thereby acquire an image to be observed for each of the first illumination light and the second illumination light； and a control unit making, consistent, the inter-image signal ratio between the plurality of images acquired by the image acquisition unit.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】照明光を完全に消灯し、点灯させて、各照明光毎に観察対象の画像を取得し、複数の画像における相互間の画像信号比を一定にする内視鏡システムを提供する。【解決手段】内視鏡システムは異なる波長の光を射出する複数の光源と、複数の光源にそれぞれ設けられており、複数の光源の光の一部を受光し、複数の光源の発光量の情報を得る光検出器と、複数の光源のうち、少なくとも１つの光源から射出される光により構成される第１の照明光と第２の照明光とを少なくとも用いて、各照明光毎に観察対象の画像を取得する画像取得部と、画像取得部で取得された複数の画像における相互間の画像信号比を一定にする制御部とを有する。【選択図】図５
