Decoder system for light pen bar code reader

摘要: A manually supported reader for a bar code which comprises plurality of parallel bars varying widths employs an optical detector generates electrical output signal is function the as moved. The light source and sensor, optically arranged to reflect off that part with it in contact, thereby each time boundary one within traversed. decoding network receives from determines required traverse successive bar. associated traversal compared internally generated criterian. As result comparison, therewith classified its width. Based on classification, criterian recalculated comparison next scanned. circuitry can be implemented computer software or hard wired.