Method for controlling the operation of an optical scanner

摘要: An optical scanner in a retail store checkout stand includes single item detector upstream of the window. Output signals from and symbol recognition logic are used to open close shutter beam path laser. The is opened first time out sequence started when interrupted. A second, short restarted each valid recognized. third intermediate length supersedes cleared. laser closed transferred terminal or controller upon completion any active predetermined number identical symbols, whichever comes first.