Device description
Leuze electronic GmbH + Co. KG
BCL 300
i
\ BCL 301
i
28
Figure 4.10: Deflection principle for the line scanner
4.4.2 Line scanner with oscillating mirror
The oscillating mirror deflects the scan line additionally to both sides across the scan direction at a
randomly adjustable oscillation frequency. In this way, the BCL 300
i
\ BCL 301
i
can also scan larger areas
or spaces for bar codes. The reading field height (and the scan line length useful for evaluation) depends
on the reading distance due to the optical opening angle of the oscillating mirror.
Areas of application of the line scanner with oscillating mirror
For line scanners with oscillating mirror, oscillation frequency, start/stop position etc. are adjustable. It is
used:
• when the position of the label is not fixed, e.g. on pallets – various labels can, thus, be detected at
various positions.
• when the bars of the bar code are printed perpendicular to the conveying direction ("picket fence
arrangement").
• when reading stationary objects.
• when a large reading field (reading window) has to be covered.
Figure 4.11: Deflection principle for the line scanner with oscillating mirror add-on
