hello, i'm lost on this... (novice in barcode, wrong keywords?)
- pharmaceutical device using ampoules
- ampoules have a barcode identifying the charge (stationary object)
- need a _small_ barcode sensor? reader? ccd based? laser something? board? chip? to integrate in the device (atmel based)
- distance to object is 5-10mm
- barcode encoding doesn't matter
the closest i came up with is symbol.com, but its no fit
please help!
thank you
lutz
You might find a few useful links in here
Peter
Intermec has several CCD scanners, and scan engines, though I'm not sure if they would fit your bill.
#disclaimer: I happen to work for them. ;-)
You haven't mentioned what your other design criteria are (cost, size, power consumption, development time, how the labels are expected to be scanned, label size, etc.).
I've used integrated emitter-detectors from HP in the past (HEDS-1000, e.g.) quite successfully (though I am no longer sure that "HP" makes *any* components...)
With a little bit of signal conditioning (buffer and window comparator, etc.) you'll end up with a "video" signal that represents the "light/dark" nature of the item passing through the detector's focus. It is a simple matter to time the interval between successive black-to-white/white-to-black transitions and, from that, deduce the relative widths of the bars/spaces -- which ultimately allows you to decode the symbol. Especially if you are free to pick the code used, character density, data encoding scheme, etc.
Take a quick peek at:
Apologies if the URL gets mangled... MS's tools like to screw up embedded spaces :-( The file name should be "Barcode Terminology.pdf" (I should just remove the space and be done with it! :> )
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