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    • 54. 发明授权
    • Diaphragm device
    • 隔膜装置
    • US5072249A
    • 1991-12-10
    • US440645
    • 1989-11-24
    • Setsuo Yoshida
    • Setsuo Yoshida
    • G03B9/06
    • G03B9/06
    • A diaphragm device of reduced diameter in the entirety comprising a base plate having a substantially round central opening, first diaphragm blades whose one ends are supported about respective pivot pins on the base plate, a first member arranged to turn all the first diaphragm blades about the pivot pins, the same number of second diaphragm blades as that of the first diaphragm blades arranged in confronting relation to the first diaphragm blades and whose one ends are supported about respective pivot pins on the base plate, and a second member arranged to turn all the second diaphragm blades about the pivot pins.
    • 整体减小的隔膜装置包括具有基本上圆形的中心开口的基板,其一端被支撑在基板上的相应枢轴销上的第一光圈叶片,布置成使所有第一光阑叶片围绕 枢转销,与第一光阑叶片布置成与第一光阑叶片相对设置的相同数量的第二光阑叶片,并且其一端被支撑在基板上的各个枢轴销上,第二部件被布置成将所有 围绕枢轴销的第二光阑叶片。