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    • 8. 发明授权
    • Correction for scan period variation in optical image scanners
    • 光学图像扫描仪扫描周期变化的校正
    • US4369365A
    • 1983-01-18
    • US256597
    • 1981-04-22
    • John BedfordGraham M. Clarke
    • John BedfordGraham M. Clarke
    • H04N3/02G01B11/00G02B26/10G02B26/12G02B27/00H01J3/14
    • G02B27/0031G01B11/00G02B26/127
    • Correction for variations in scan period of optical image scanners includes measuring and storing the scan times at which optical events occur to cause image detector signals, detecting an optical marker near the end of the scan and the scan time of its detection, determining the difference between this scan time and a stored scan period, comprising the nominal scan time for marker detection, which difference represents the scan period error, dividing the difference by the stored scan period to provide a scan time unit error and multiplying each stored measured scan time by the unit error to provide a correction for each measured scan time, thereafter adding the correction to the stored measured scan time to give a corrected scan time.
    • 光学图像扫描仪的扫描周期变化的校正包括测量和存储发生光学事件的扫描时间,以引起图像检测器信号,检测在扫描结束附近的光学标记和其检测的扫描时间,确定 该扫描时间和存储的扫描周期包括用于标记检测的标称扫描时间,该差表示扫描周期误差,将差除以所存储的扫描周期以提供扫描时间单位误差,并将每个存储的测量扫描时间乘以 单位错误,以对每个测量的扫描时间提供校正,然后将校正添加到所存储的测量扫描时间以给出校正的扫描时间。