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    • 81. 发明授权
    • Optical dual sensor bar code scanning system
    • 光学双传感器条码扫描系统
    • US5268562A
    • 1993-12-07
    • US882551
    • 1992-05-13
    • Mihal Lazaridis
    • Mihal Lazaridis
    • G06K7/10
    • G06K7/10861G06K2007/10485G06K2007/10495
    • The present invention is directed to a system for optically scanning a bar code particularly a bar code provided on a generally transparent or translucent media through which light can be projected. In particular, the invention is directed to a system for optically scanning a bar code provided on the edge of picture film, preferably motion picture film. The system includes a light source on one side of the generally transparent media and an arrangement for moving the media past the light source such that the bar code interrupts the light and produces a modulated light signal according to the characteristics of the bar code on the opposite side of the media. An optically sensing arrangement is provided on the opposite side of the media for sensing the modulated light signal and includes at least two sensors spaced in the direction of movement of the generally transparent media. With this arrangement, the signal output of the sensors are shifted in time according to the spacing between the sensors. The system includes a processing arrangement for processing the signal output of the sensors to extract the bar code used to modulate the light passing through the generally transparent media by the signal output of the sensors. With this arrangement, accurate reading of the bar code is possible with the media moving at substantial speeds past the scanning system. This system has particular application for film, but could be used in other bar code reading applications using reflected light.
    • 本发明涉及一种用于光学扫描条形码的系统,特别是设置在可以投射光的大致透明或半透明介质上的条形码。 特别地,本发明涉及一种用于光学扫描设置在图像胶片边缘上的条形码,优选为电影胶片的系统。 该系统包括在通常透明介质的一侧上的光源和用于使介质移动通过光源的装置,使得条形码中断光并根据相反的条形码的特性产生调制的光信号 媒体的一面。 光学感测装置设置在介质的相对侧上,用于感测调制的光信号,并且包括至少两个在通常透明介质的移动方向上隔开的传感器。 利用这种布置,传感器的信号输出将根据传感器之间的间隔在时间上移动。 该系统包括用于处理传感器的信号输出的处理装置,以提取用于通过传感器的信号输出调制通过通常透明介质的光的条形码。 利用这种布置,当介质以相当大的速度移动通过扫描系统时,条形码的准确读取是可能的。 该系统具有电影的特殊应用,但可用于使用反射光的其他条码阅读应用。