PROBLEM TO BE SOLVED: To acquire desired information of a biological tissue in a further clear state suited for a diagnosis when observing the biological tissue by white light and special light.SOLUTION: An endoscope apparatus includes: a first light source 51 defining a semiconductor light-emitting element as a light-emitting source a second light source 53 defining a semiconductor light-emitting element having a different light emission wavelength from that of the first light source 51, as a light-emitting source a wavelength conversion member 57 excitingly emitting light by outgoing light from at least one of the first light source 51 and the second light source 53 and light quantity rate change means 55 for changing a light quantity rate of the outgoing light from the first light source 51 and the outgoing light from the second light source 53. The endoscope apparatus optionally generates the outgoing light from the first light source 51 and the outgoing light from the second light source 53 to provide illumination light suited for the diagnosis according to absorption characteristics and scatter characteristics of a biological tissue. This configuration can thus acquire desired tissue information of the biological tissue in a further clear state.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】白色光や特殊光による生体組織の観察時に、生体組織の所望の組織情報を、診断に適したより明瞭な状態で取得する。【解決手段】半導体発光素子を発光源とする第1の光源51と、第1の光源51とは異なる発光波長の半導体発光素子を発光源とする第2の光源53と、第1の光源51、第2の光源53の少なくとも一方からの出射光により励起発光する波長変換部材57と、第1の光源51からの出射光と第2の光源53からの出射光との光量比を変更する光量比変更手段55と、を備えることで、第1の光源51からの出射光と第2の光源53からの出射光を任意に発生させて、生体組織の吸収特性および散乱特性に応じた診断に適した照明光を提供できる。これにより、生体組織の所望の組織情報が、より明瞭な状態で取得可能となる。【選択図】図2
