Auto-focus technology comes to barcode scanners
A
SICK (UK) product story
Edited by the Engineeringtalk editorial team
Aug 9, 2000
The auto-focus technology exhibited by most cameras has, for the first time, found a place in barcode scanner technology - in a design suitable for industry.
The auto-focus technology exhibited by most cameras has, for the first time, found a place in barcode scanner technology - in a design suitable for industry.
The advantage is the same as in cameras: the subject in question is always kept in focus regardless of the particular distance between the viewer and the object itself.
As a result, Sick's real-time auto-focus scanner provides optimal reading results and can be employed with far more flexibility.
Uneven reading distances are particularly common in storage and handling technology as a result of the varying sizes of the target objects.
This is the case in parcel and courier services as well as in commissioning centres or automatic flight luggage identification.
Scanners with real-time auto-focus can determine the distance to the target object within a few milliseconds and adapt the scanner's optics appropriately, making measurement systems for sizing the object and triggering the scanner unnecessary.
Furthermore, with decoding frequencies of up to 1,200 Hz, objects at high transport speeds are also reliably identified.
Auto-focus technology is not just significant for devices with line scanning, but also for those with an oscillating mirror.
Auto-focus allows these scanners to 'look for' randomly placed bar-code labels on an object's surface with reliable identification regardless of reading distance.
In addition, omni-directional reading gates (which serve to identify objects with a random alignment of the label) can be created more easily and with a lower number of devices.
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