Bar code scanner with RF coupling to base terminal and automatic turn-off upon decode

摘要

A scanning head for reading bar code symbols includes a laser source producing a beam which is scanned across a symbol to be read by a moving mirror arrangement, and a photodetector responsive to a light reflected from the symbol. The signal from the photodetector is digitized and decoded to recover bar code data. A transmitter and receiver are located in the scanning head for communication with a central computer, and a battery is included in the head as a power supply, so that the scanning head need not be connected by a cable to a terminal. A controller immediately and automatically turns off the light source and scan when an evaluation of the signal indicates that a bar code is detected.