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Bar Code Scanner

A bar code scanner is a device for translating bar codes into commonly understood data. A bar code scanner uses one of several optical scanning technologies to distinguish image contrast. Photodiode scanners read bar codes by distinguishing dark bars from white spaces by the difference in reflected light intensity as a bar code moves past the photodiode. Similarly, CCD scanners differentiate reflected light intensity with an array of light sensors. New scanning technologies capture a digital image of the bar code and use sophisticated image processing software.

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