Focusing device for use in optical apparatuses
    2.
    发明授权
    Focusing device for use in optical apparatuses 失效
    聚焦装置用于光学装置

    公开(公告)号:US4789880A

    公开(公告)日:1988-12-06

    申请号:US74052

    申请日:1987-07-16

    CPC分类号: G03B21/11 G02B7/32 G03B27/34

    摘要: A focusing device for use in micro film readers or the like for projecting micro images to give in-focus conditon exactly and readily. The present device includes a memory for storing a distance data representing the distance between an original and a projective lens at in-focus position thereof, and a sensor for measuring the distance between an original and the projective lens wherein the projective lens is moved to the in-focus position by a focusing motor in response to the distance data stored in the memory and a signal representing the measured distance generated from the sensor.

    摘要翻译: 一种用于微型读取器等的聚焦装置,用于投影微图像以准确且容易地提供对焦条件。 本装置包括:存储器,用于存储表示在其对焦位置处的原件和投影镜头之间的距离的距离数据;以及用于测量原稿和投影透镜之间的距离的传感器,其中投影透镜移动到 通过聚焦电机响应存储在存储器中的距离数据的对焦位置和表示从传感器产生的测量距离的信号。

    Lens position correction device
    3.
    发明授权
    Lens position correction device 失效
    镜头位置校正装置

    公开(公告)号:US4989950A

    公开(公告)日:1991-02-05

    申请号:US282447

    申请日:1988-12-09

    申请人: Hiroaki Nakauchi

    发明人: Hiroaki Nakauchi

    IPC分类号: G02B7/04 G02B7/02

    CPC分类号: G02B7/023

    摘要: A lens barrel having a movable barrel with a first cam channel, a fixed barrel with a second cam channel, a lens holding frame and a cam follower fitted in each of the first and second cam channels and fixed onto the lens holding member. The cam follower is made of elastic material and has a contact portion formed on the peripheral surface thereof so as to be in elastically pressing contact with one of the movable barrel, the fixed barrel and the lens holding member.

    摘要翻译: 一种镜筒,具有带有第一凸轮通道的可移动镜筒,具有第二凸轮槽的固定镜筒,透镜保持框架和安装在每个第一和第二凸轮通道中并固定到透镜保持构件上的凸轮从动件。 凸轮从动件由弹性材料制成,并且具有形成在其外周表面上的接触部分,以便与可动筒体,固定筒体和透镜保持部件中的一个弹性压接。