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    • 2. 发明授权
    • Barcode badge and ticket reader employing beam splitting
    • 条形码徽章和票读卡器采用光束分割
    • US5053612A
    • 1991-10-01
    • US500383
    • 1990-03-28
    • William J. PielemeierJames L. Jessup
    • William J. PielemeierJames L. Jessup
    • G06K7/10G06K7/14
    • G06K7/10722G06K7/14
    • This invention is a badge and ticket barcode reader which meets the need in the art for a cost effective and reliable barcode reader for naive users. It employs a charge coupled device type scanner in conjunction with a beam splitter, an illumination source which illuminates both sides of the card, a set of mirrors and a guide slot. The set of mirrors reflect light from the two sides of the card to opposite faces of the beam splitter and thus produces an overlaid image of the two sides. The output of the charge coupled device is processed in a known fashion to decipher the barcode. The two sides of the card may be illuminated by a single source via the beam splitter and the set of reflectors or directly via separate sources. The barcode reader may resolve the ambiguity of the two overlaid images either by printing the reverse side of the card black, or via two light sources that are activated alternately in synchronism with the scan of the charge coupled device. The set of reflectors may include three reflectors or two reflectors. This technique is useful for naive users because it can read the badge or ticket no matter which side is inserted, it reads when the badge or ticket is partially or fully inserted and no particular motion other than nearly full insertion is required.
    • 本发明是一种徽章和票条形码读取器,其符合本领域对于天真用户的成本有效和可靠的条形码读取器的需要。 它采用电荷耦合器件类型的扫描器与分束器,照明源的两侧,一组反射镜和引导槽。 这组镜子将来自卡的两侧的光反射到分束器的相对面,从而产生两侧的重叠图像。 以已知的方式处理电荷耦合器件的输出以破译条形码。 卡的两侧可以通过分束器和一组反射器由单个光源照亮,或者直接通过单独的光源照亮。 条形码读取器可以通过打印卡片黑色的反面,或通过与电荷耦合器件的扫描同步地交替激活的两个光源,来解决两个重叠的图像的模糊性。 该组反射器可以包括三个反射器或两个反射器。 这种技术对于天真的用户是有用的,因为它可以读取徽章或票据,无论插入什么方面,当徽章或票证部分或完全插入时,它读取,并且不需要除了几乎完全插入之外的特定动作。