Barcode Scanners

An optical scanning device designed to read information printed in the form of bars of different size by detection and processing of the varying reflectivity of light in the bar code. It consists of a light source, a lens and a light sensor translating optical impulses into electrical ones. In addition to a scanner, a barcode reader must contain decoder circuitry for analyse the barcode's image data provided by the sensor.

Also:

See also:

http://www.metrologic.com/vsts1095.htm Omnidirectional scanning, as defined by Roger C. Palmer, The Bar Code Book, is when a "series of straight or curved scanning lines of varying directions in the form of a starburst, a lissajous pattern, or other multiangle arrangement are projected at the symbol and one or more of them will be able to cross all of the symbol's bars and spaces, no matter what the orientation."
http://www.nationalbarcode.com/History-of-Barcode-Scanners.htm

file: /techref/barcode/scanners.htm, 1KB, , updated: 2009/1/19 13:21, local time: 2009/11/21 15:53,

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