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    • 2. 发明公开
    • Zoom lens apparatus
    • Zoomlinsengerät
    • EP0751413A1
    • 1997-01-02
    • EP96420198.2
    • 1996-06-07
    • EASTMAN KODAK COMPANY
    • Weigand , John George, c/o Eastman Kodak Co.Kralles, Christopher John, c/o Eastman Kodak Co.Reyner, Noel Leonard, c/o Eastman Kodak Co.
    • G02B7/10G03B27/46
    • G03B27/36G02B7/102
    • A zoom lens apparatus having a first pair of substantially parallel guide rods (14,15). A pair of carriage assemblies (16,116) are mounted to the first pair of parallel guide rods (14,15) each having lens element. A pair of lead screws (28,128) are provided for driving the carriage assemblies (16,116). The screws (28,128) are each mounted to the apparatus by a bearing block assembly (30) such that the longitudinal axis of the lead screw (28,128) is substantially parallel to the first pair of guide rods (14,15). The bearing block (30) constrains the movement of the first lead screw (28) along the longitudinal axis. A zero constraint threaded drive coupling is provided with each lead screw (28,128) for moving the carriage along the guide rods. A motor (84) is provided for rotating each of the drive screws.
    • 一种变焦透镜装置,具有第一对基本平行的导杆(14,15)。 一对托架组件(16,116)安装到每个具有透镜元件的第一对平行导杆(14,15)上。 提供一对导螺杆(28,128),用于驱动支架组件(16,116)。 螺钉(28,128)各自通过轴承座组件(30)安装到设备上,使得导螺杆(28,128)的纵向轴线基本上平行于第一对导杆(14,15)。 轴承座(30)限制第一导螺杆(28)沿着纵向轴线的移动。 每个导螺杆(28,128)都设置有零约束螺纹驱动联轴器,用于沿着导杆移动托架。 设置有用于旋转每个驱动螺杆的马达(84)。