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    • 8. 发明授权
    • Endoscope optical system and endoscope
    • 内镜光学系统和内窥镜
    • US08767320B2
    • 2014-07-01
    • US13984169
    • 2012-02-07
    • Hiroaki Fujii
    • Hiroaki Fujii
    • G02B21/02G02B13/04G02B9/34G02B23/24
    • G02B23/243A61B1/00163A61B1/00174G02B9/34G02B13/0015G02B13/04G02B23/2423G02B23/2438
    • An endoscope optical system, including a front group and a rear group arranged in this order from an object side such that an aperture stop is arranged between the front and rear groups, wherein the front group includes a negative lens and a positive lens arranged in this order from the object side, the rear group includes a positive lens and a cemented lens arranged in this order from the object side, and when f (unit: mm) denotes a focal length of an entire endoscope optical system, EX (unit: mm) denotes a distance (which takes a minus sign on the object side with respect to an image plane) from the image plane to an exit pupil, and f2 (unit: mm) denotes a focal length of the rear group, the endoscope optical system satisfies conditions: −10
    • 一种内窥镜光学系统,包括从物体侧依次排列的前组和后组,使得前组和后组之间布置孔径光阑,其中前组包括负透镜和布置在该组中的正透镜 从物体侧起,后组包括从物体侧依次排列的正透镜和胶合透镜,并且当f(单位:mm)表示整个内窥镜光学系统的焦距时,EX(单位:mm )表示从图像平面到出射光瞳的距离(相对于像面在物体侧取负号),f2(单位:mm)表示后组的焦距,内窥镜光学系统 满足条件:-10