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    • 22. 发明授权
    • Automatic focusing device of a microscope
    • 自动对焦装置的显微镜
    • US4342905A
    • 1982-08-03
    • US180150
    • 1980-08-21
    • Norio FujiiAtsushi KawaharaMasahiro Sawada
    • Norio FujiiAtsushi KawaharaMasahiro Sawada
    • G02B21/24G01J1/20
    • G02B21/244
    • An automatic focusing device of a microscope having an objective lens and a stage on which a specimen is placed comprises distance varying means for varying the relative distance between the objective lens and the stage, distance detecting means for producing a distance output corresponding to said distance, photoelectric detector means for photoelectrically detecting a high frequency component of the space frequency component of the image of the specimen on the stage by the objective lens, judging means for judging whether or not a predetermined peak smaller than a maximum peak exists in the output of the photoelectric detector means within a predetermined distance range from a first distance output of the distance detecting means when the output of the photoelectric detector means assumes said maximum peak and for producing an in-focus output when said predetermined peak exists, and means for determining said relative distance on the basis of said in-focus output.
    • 具有物镜的显微镜的自动聚焦装置和放置有试样的台架包括用于改变物镜与台架之间的相对距离的距离变化装置,用于产生对应于所述距离的距离输出的距离检测装置, 光电检测装置,用于通过物镜光电检测载物台上的样本的空间频率分量的高频分量;判断装置,用于判断小于最大峰值的预定峰值是否存在于 光电检测装置,当光电检测装置的输出呈现所述最大峰值时,距距离检测装置的第一距离输出预定距离范围内,并且当存在所述预定峰值时产生对焦输出,以及用于确定所述相对 基于所述对焦输出的距离。