A scanning system and method reads information symbols, such as optical mark recognition ("OMR") symbols. Each OMR symbol typically includes a predetermined number of cells, with each cell containing a bar or a space. An object detector detects the presence of an object having an affixed OMR symbol and...http://www.google.fr/patents/US6502750?utm_source=gb-gplus-shareBrevet US6502750 - Scanning beam system and method for reading information symbols
Scanning beam system and method for reading information symbols
