PROBLEM TO BE SOLVED: To provide an endoscope apparatus which has two pairs of irradiation windows for illuminating an area to be observed in the leading end of the endoscope insertion portion while the diameter of the endoscope insertion portion can be reduced and uneven radiation can be prevented, and also which can simultaneously radiate narrow bandwidth light respectively having different spectra.SOLUTION: A first irradiation portion that radiates white light onto a subject, a second irradiation portion that radiates narrow bandwidth light having a narrower wavelength bandwidth than the white light, and an observation window 39 used to observe the subject are respectively disposed on a leading end surface of an endoscope insertion portion 35. Each of the first and second irradiation portions includes a pair of irradiation windows 71A to 71D for emitting light therefrom. When a straight line passing through a center point 39 of the observation window and bisecting the leading end surface is defined as a boundary line L3, the pair of irradiation windows 71C and 71D of the first irradiation portion are disposed on the leading end surface on both sides of the boundary line L3, and the pair of irradiation windows 71A and 71B of the second irradiation portion are disposed on the leading end surface on the both sides of the boundary line. Spectra of lights radiated from the irradiation windows 71A and 71B of the second irradiation portion can be changed individually.COPYRIGHT: (C)2012,JPO&INPIT【課題】被観察領域を照明する二対の照射窓を、内視鏡挿入部の先端に細径化と照明ムラ防止を図りつつ配置し、互いに異なるスペクトルの狭帯域光を同時に照射する。【解決手段】白色光を照射する第1照射部、白色光より狭い波長帯の狭帯域光を照射する第2照射部、及び被検体の観察窓39がそれぞれ内視鏡挿入部35の先端面に配置される。第1、第2照射部はそれぞれ光を出射する一対の照射窓71A~71Dを有する。観察窓39の中心点を通って内視鏡挿入部の先端面を二等分する直線を境界線L3としたとき、第1照射部の一対の照射窓71C,71Dは境界線L3を挟んだ先端面の両側に配置され、第2照射部の一対の照射窓71A,71Bは境界線L3を挟んだ先端面の両側に配置されている。第2照射部の各照射窓71A,71Bから照射する光のスペクトルを、光源制御部により個別に変更可能にした。【選択図】図8
