Recording medium mark detector
    15.
    发明授权
    Recording medium mark detector 失效
    记录介质标记检测器

    公开(公告)号:US4665318A

    公开(公告)日:1987-05-12

    申请号:US777600

    申请日:1985-09-19

    IPC分类号: G06K7/10 G06K17/00

    CPC分类号: G06K7/10851 G06K17/0016

    摘要: A mark detecting apparatus for detecting marks provided on a recording medium has a photoelectric converting device for receiving a light from the base and marks on the recording medium, a first setting device for setting a first predetermined reference value, a second setting device for setting a second reference value corresponding to the output of the photoelectric converting device, and a detecting device for selecting one of the first reference value and the second reference value and comparing the selected reference value with the output of the photoelectric converting device to thereby detect the presence or absence of the marks.

    摘要翻译: 用于检测设置在记录介质上的标记的标记检测装置具有:光电转换装置,用于从基座接收光并在记录介质上标记;第一设定装置,用于设定第一预定基准值;第二设定装置, 对应于光电转换装置的输出的第二参考值,以及用于选择第一参考值和第二参考值中的一个的检测装置,并将所选择的参考值与光电转换装置的输出进行比较,从而检测光电转换装置的存在或 没有标记。