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    • 71. 发明授权
    • Lens position control device
    • 镜头位置控制装置
    • US4950054A
    • 1990-08-21
    • US359388
    • 1989-05-31
    • Hiroyuki WadaNaoya KanedaMasahide HirasawaHirofumi Suda
    • Hiroyuki WadaNaoya KanedaMasahide HirasawaHirofumi Suda
    • G02B7/08G02B7/10G02B7/28
    • G02B7/102
    • A position control device for a lens system, the system including a variator and a compensator the latter of which also serves as the focusing lens, comprising device for detecting the degree of focus, device for detecting the positions of the variator and compensator, device for controlling movement of the compensator in accordance with at least the output of the position detecting device, and device responsive to occurrence of an out-of-focus state for correcting the manner in which the control device controls movement of the compensator, whereby the correcting device varies the manner between when the variator moves from the telephoto side to the wide-angle side and when from the wide-angle side to the telephoto side.
    • 一种用于透镜系统的位置控制装置,该系统包括变换器和补偿器,后者还用作聚焦透镜,包括用于检测聚焦透镜的装置,用于检测变倍器和补偿器的位置的装置,用于 至少根据所述位置检测装置的输出控制所述补偿器的移动,以及响应于出现所述控制装置控制所述补偿器的运动的方式来校正所述失焦状态的装置,由此所述校正装置 改变变焦器从长焦侧向广角侧移动时以及从广角侧向长焦侧移动的方式。
    • 73. 发明授权
    • Automatic focusing device
    • 自动对焦装置
    • US4623237A
    • 1986-11-18
    • US752170
    • 1985-07-03
    • Naoya KanedaYouichi IwasakiMasamichi Tohyama
    • Naoya KanedaYouichi IwasakiMasamichi Tohyama
    • G01S7/497G02B7/34G03B3/00
    • G02B7/34G01S7/497
    • An automatic focusing device having a light projecting device, a light receiving device arranged to detect a reflection light quantity reflected by an object to be photographed as a result of light projection by the light projecting device and a distance measuring device arranged to measure a distance to the object by the reflection light quantity received by the light receiving device is capable of adequately performing a focusing operation even in cases where the reflection light quantity is at a level too low for the distance measuring device to give any result of distance measurement. This advantage is attained by the following arrangement: (i) the automatic focusing device is provided with a current control device which is arranged to increase the power of a light flux to be emitted from the light projecting device; (ii) a lens driving operation is brought to a stop in the event of an object of a low reflection factor; (iii) the light quantity accumulating time of the light receiving means can be lengthened; or (iv) a comparison level can be lowered.
    • 一种具有投光装置的自动对焦装置,受光装置,被配置为检测由所述投光装置的光投射而被被拍摄物体反射的反射光量;以及距离测量装置,其被配置为测量与 即使在距离测量装置的反射光量处于太低的水平的情况下,由光接收装置接收到的反射光量的物体也能够适当地执行聚焦操作,以给出距离测量的任何结果。 该优点通过以下配置来实现:(i)自动聚焦装置设置有电流控制装置,该电流控制装置被布置成增加从光投射装置发射的光束的功率; (ii)在反射系数低的物体的情况下使透镜驱动动作停止; (iii)光接收装置的光量累积时间可以延长; 或(iv)可以降低比较水平。