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    • 96. 发明授权
    • Individual exposure control over individually illuminated subfields of view split from an imager in a point-of-transaction workstation
    • 单独照明的子视野中的个人曝光控制从交易点工作站中的成像器分割
    • US08939371B2
    • 2015-01-27
    • US13173640
    • 2011-06-30
    • Edward Barkan
    • Edward Barkan
    • G06K7/10
    • G06K7/10732G06K7/10722G06K7/10752G06K7/1096
    • A bi-optical, dual window, point-of-transaction workstation images indicia associated with multi-sided products by splitting the field of view of each imager into a plurality of subfields that simultaneously extend through each window over regions of the product. A plurality of energizable illuminators, one for each subfield, illuminates each subfield with illumination light over an adjustable illumination time. The illumination light returned from the indicia in each subfield is captured along respective optical paths from each window to each imager. A plurality of exposure sensors, one for each subfield, and located externally of each imager, senses the returned illumination light in each subfield. A controller energizes each illuminator to illuminate each subfield, deenergizes each illuminator when the returned illumination light sensed by the respective exposure sensors exceeds a threshold, and processes the captured illumination light in at least one of the subfields.
    • 通过将每个成像器的视野分割​​成同时延伸穿过产品的区域上的每个窗口的多个子场,来实现与双面产品相关联的双光学双窗口交易点工作站图像标记。 多个可激励的照明器,每个子场一个,在可调整的照明时间上用照明光照射每个子场。 从每个子场的标记返回的照明光被从每个窗口到每个成像器的各个光路被捕获。 多个曝光传感器,每个子场一个,并且位于每个成像器的外部,感测每个子场中返回的照明光。 控制器对每个照明器通电以照亮每个子场,当由相应的曝光传感器感测到的返回的照明光超过阈值时,使每个照明器断电,并且在至少一个子场中处理捕获的照明光。