PROBLEM TO BE SOLVED: To provide a surgical microscope eyepiece structure having an inner barrel that does not turn when moved in an optical axis direction for diopter adjustment.SOLUTION: When outer barrels 6, 7 are rotated, a protrusion 16 of an inner barrel 4 is guided by a spiral groove 19 formed on an inner surface of the outer barrel 7 to be moved back and forth along an optical axis direction. The protrusion 16 is guided by a straight hole 17 of an intermediate barrel 5 that is not rotatable and, as such, the inner barrel is capable of moving in the optical axis direction but not rotating. An astigmatic lens 10 is added in the inner barrel 4 to allow astigmatic surgeons to conduct surgeries without glasses.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2018,JPO&INPIT【課題】内筒を視度調整のために光軸方向に移動しても内筒自体は回転しない手術顕微鏡の接眼部構造を提供する。【解決手段】外筒6,7を回転させると外筒7の内面の螺旋溝19にガイドされて、内筒4の突起16が光軸方向へ進退動するが、その突起16が非回転の中間筒5のストレート孔17にガイドされているため、光軸方向に移動するが回転はしない。内筒4に乱視是正レンズ10を追加したため、乱視の術者もメガネを外して手術することができる。【選択図】 図6
