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    • 2. 发明申请
    • ENDOSCOPE OBJECTIVE OPTICAL SYSTEM
    • 内窥镜目标光学系统
    • US20100020408A1
    • 2010-01-28
    • US12508817
    • 2009-07-24
    • Azusa NOGUCHI
    • Azusa NOGUCHI
    • G02B15/14
    • G02B23/2438G02B15/173
    • An endoscope objective optical system used in an endoscope has an objective optical system including a first lens group having a positive refractive power, an aperture stop, a second lens group having a negative refractive power and a third lens group having a positive refractive power, the first lens group, the aperture stop and the second and third lens group being successively disposed from the object side. The second lens group is made movable along an optical axis to change the focal length of the objective optical system. The lens surface at the object-side outermost position in the first lens group is formed so as to be convex on the object side.
    • 在内窥镜中使用的内窥镜物镜光学系统具有物镜光学系统,该物镜光学系统包括具有正折光力的第一透镜组,孔径光阑,具有负屈光力的第二透镜组和具有正屈光力的第三透镜组, 第一透镜组,孔径光阑和第二和第三透镜组从物体侧连续设置。 第二透镜组可沿光轴移动以改变物镜光学系统的焦距。 第一透镜组中的物体侧最外侧位置处的透镜表面被形成为在物体侧是凸的。