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Device description
4.4.2
Line scanner with oscillating mirror
The oscillating mirror deflects the scan line additionally to both sides across the scan direc-
tion at a randomly adjustable oscillation frequency. In this way, the BCL 500
also scan larger areas or spaces for barcodes. The reading field height (and the scan line
length useful for evaluation) depends on the reading distance due to the optical beam width
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 barcode are printed perpendicular to the conveying direction
('picket fence arrangement').
• when reading stationary objects.
• when the barcode is turned out of the horizontal position.
• when the scanning distance is large.
• when a large reading field (reading window) has to be covered.
Figure 4.5:
24
Deflection principle for the line scanner with oscillating mirror add-on
BCL 500
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i
\ BCL 501
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\ BCL 501
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can
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