| 摘要 |
<p>PURPOSE:To enable the read-in of bar code of goods with bar code which is carried with aconveyor and its double check by means of one set of reader. CONSTITUTION:The goods 2 with a bar code 3 is carried with a velt conveyor 1 and read at two parts with the reader 7 for double check. In the reader 7, the light produced from the laser tube 9 is projected for optical scanning of bar code by using a mirror 18 and rotary mirror 12. In this case, the light from the rotary mirror 12 is deflected for the direction with the mirror 15 if the mirror 15 is located at a given location and if the mirror 15 is located upper than the specified locations, the light goes straight without being deflected. Thus, one reader can scan for two parts. Further, 13 is the photodetector to detect the reflected light.</p> |
