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    • 4. 发明授权
    • Optical instrument
    • 光学仪器
    • US5173807A
    • 1992-12-22
    • US499815
    • 1990-03-27
    • Naoya KanedaYasuhiro TamekuniYouichi Iwasaki
    • Naoya KanedaYasuhiro TamekuniYouichi Iwasaki
    • G02B7/08G02B7/10
    • G02B7/102
    • This specification discloses an optical instrument comprising a focusing lens, a zooming lens, first detecting means for detecting the focus state of the focusing lens, and control means for moving the zooming lens in conformity with the output of the first detecting means and making the size of an object which is occupied in the picture plane substantially constant, the control means varying the movement speed of the zooming lens in conformity with the output of the first detecting means. The specification also discloses an optical instrument comprising a focusing lens, a zooming lens, first detecting means for detecting the focus state of the focusing lens, second detecting means for detecting the magnification change state of the zooming lens, and control means for moving the zooming lens in conformity with the relative position information of the two lenses based on the outputs of the first detecting means and the second detecting means and making the size of an object which is occupied in the picture plane substantially constant, the control means varying the conditions for the start of the movement of the zooming lens in conformity with the output of the first detecting means.
    • 本说明书公开了一种光学仪器,其包括聚焦透镜,变焦透镜,用于检测聚焦透镜的聚焦状态的第一检测装置,以及用于根据第一检测装置的输出移动变焦透镜的控制装置, 控制装置根据第一检测装置的输出来改变变焦透镜的移动速度。 本说明书还公开了一种光学仪器,包括聚焦透镜,变焦透镜,用于检测聚焦透镜的聚焦状态的第一检测装置,用于检测变焦透镜的倍率变化状态的第二检测装置,以及用于移动变焦 透镜基于第一检测装置和第二检测装置的输出而与两个透镜的相对位置信息相一致,并使得在图像平面中占据的物体的大小基本上恒定,控制装置改变条件 根据第一检测装置的输出开始变焦透镜的移动。