OPTICAL CODE READER EQUIPPED WITH OPTICAL SCANNING DEVICE

摘要

PROBLEM TO BE SOLVED: To recognize the presence of an article with no recognizable code in a read area. SOLUTION: The scanning device 11 sends a light beam for scanning movement into the read area provided at a read distance L. The read area has a flat front surface 13 and specific depth. An article 16 carrying an optically detectable article code 15 moves through the read area and an electronic evaluation system 17 provided at the output end of the scanning device evaluates an electric signal generated by a photoreceiver array 19 from light reflected on the scanning device from the code to discriminate the article code. A light reflecting means 18 is arranged behind the read area and reflects the light received from the scanning device when the article 16 is not present in the read area. The electronic evaluation system is equipped with an article recognizing means 21 and inhibits the article discrimination until light whose arrival from the reflecting means 18 can be discriminated is not received.