| 摘要 |
<p>PURPOSE:To easily and accurately read bar code information by providing a laser beam incident intensity control means, etc., and constituting so that the intensity level of a signal beam incident on a laser beam detector does not differ even when the read bar code exists in any direction. CONSTITUTION:The laser beam reflected after scanning the bar code 100 among the laser beams scanned in plural directions by laser beam scanning means 4, 8 is detected by a laser beam detection means 13. Then, from the detection result by scanning optical path detection means 6, 7, when no laser beam is scanned in the scanning direction of attenuating, the intensity of the laser beam incident on the laser beam detection means 13 is weakened by an incident intensity control means 17. At this time, by scanning direction conversion mirrors 4a-4d, the beam scans in the direction suitable for reading bar code information by any scanning line among four scanning lines even when the bar code 100 faces on a read part in any direction.</p> |
