PROBLEM TO BE SOLVED: To provide a super-magnifying observation endoscope capable of easily observing walls of the cardia on a super-magnified basis.SOLUTION: The super-magnifying observation endoscope comprises: a confocal optical system 31 which is arranged within an insertion section extending forward from an operation unit, and the optical axis OA1 of which is parallel with the axis of the insertion section a first light guide 34 which is arranged within the insertion section and allows light to enter the confocal optical system a light-transmissive observation window 25 arranged on a peripheral surface of the insertion section a right-angled prism 33 or a mirror 61 which is arranged within the insertion section, and which reflects the light emitted by the confocal optical system in a direction orthogonal to the axis of the insertion section so that the light is condensed to a first condensing point set on a surface of the observation window or in the vicinity on the surface outside the observation window and a second light guide 34 which receives, at a second condensing point confocal with the first condensing point, the light emitted by the confocal optical system and reflected by one of the right-angle prism and the mirror and the first condensing point and sends the light to a confocal image processor 50.COPYRIGHT: (C)2016,JPO&INPIT【課題】噴門の壁を容易に超拡大観察することが可能な超拡大観察用内視鏡を提供する。【解決手段】操作部から前方に延びる挿入部内に設けた、その光軸OA1が挿入部の軸線と平行な共焦点光学系31と、挿入部内に設けた、光を共焦点光学系に入射させる第一ライトガイド34と、挿入部の周面に設けた、光が透過可能な観察窓25と、挿入部内に設けた、共焦点光学系が出射した光を軸線と直交する方向に反射させながら観察窓の表面又は観察窓の外側の該表面近傍に設定した第一集光点に集光する直角プリズム33又はミラー61と、直角プリズムとミラーのいずれか一方と第一集光点が反射しかつ共焦点光学系が出射した光を第一集光点と共焦点の関係にある第二集光点で受光し、光を共焦点画像用プロセッサ50に送る第二ライトガイド34と、を備える。【選択図】図3
