PROBLEM TO BE SOLVED: To provide a surgical microscope capable of appropriately changing a substantial angle formed between right and left observation luminous fluxes.SOLUTION: A surgical microscope 1 comprises an observation optical system 30, a first lens 31 and a substantial angle change part 21. The observation optical system 30 guides an observation luminous flux RS for a right eye and an observation luminous flux LS for a left eye from an observation object. The first lens 31 is a lens provided on the observation optical system 30, a front focus of which becomes an object surface of the observation object in the case where other lenses are not placed on an optical path between the observation object and itself. The substantial angle change part 21 is provided on the optical path between the first lens 31 and the observation object. The substantial angle change part 21 changes a substantial angle α formed between an optical axis of the observation luminous flux RS for a right eye and an optical axis of the observation luminous flux LS for a left eye from the observation object, and a focal place of the observation optical system 30.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】左右の観察光束の実体角を適切に変更することが可能な手術顕微鏡を提供する。【解決手段】手術顕微鏡1は、観察光学系30、第1レンズ31、および実体角変更部21を備える。観察光学系30は、観察対象からの右眼用の観察光束RSと左眼用の観察光束LSを導光する。第1レンズ31は、観察光学系30に設けられるレンズであり、観察対象との間の光路上に他のレンズが配置されていない場合に前側焦点が観察対象の物体面となる。実体角変更部21は、第1レンズ31と観察対象の間の光路上に配置される。実体角変更部21は、観察対象からの右眼用の観察光束RSの光軸と左眼用の観察光軸LSとが成す実体角α、および観察光学系30の焦点面を変更する。【選択図】図1
