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    • 4. 发明申请
    • Variable Magnification Observation Optical System
    • 可变放大观察光学系统
    • US20160170188A1
    • 2016-06-16
    • US14888173
    • 2014-05-01
    • KONICA MINOLTA, INC.
    • Makoto JIN
    • G02B15/163G02B23/00G02B27/00
    • G02B15/163G02B23/00G02B25/001G02B27/0025
    • These variable-magnification observation optical systems are provided with an objective system, an erecting system, and an eyepiece system. In order from the object side, the objective system has a positive first lens group, a positive second lens group, and a negative third lens group. In order from the object side, the eyepiece system has a positive fourth lens group and a positive fifth lens group. The erecting system is located between the first and second lens groups. In order from the object side, the fifth lens group has the following, with air gaps in between: a negative meniscus lens element, the concave surface of which faces the object side; a negative meniscus lens element, the convex surface of which faces the object side; and a biconvex positive lens element.
    • 这些可变放大率观察光学系统设置有物镜系统,竖立系统和目镜系统。 从物体侧开始,物镜系统具有正的第一透镜组,正的第二透镜组和负的第三透镜组。 从物体侧开始,目镜系统具有正的第四透镜组和正的第五透镜组。 竖立系统位于第一和第二透镜组之间。 从物体侧开始,第五透镜组具有如下的空隙:其凹面朝向物体侧的负弯月形透镜元件; 负弯月透镜元件,其凸面面向物体侧; 和双凸正透镜元件。