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Components
of Barcode System
Scanners
- All use Light Emitting Diode (LED)
and photo detector to scan barcodes.
- Contact (Wand and Charged Coupled
Device) – Require direct contact
with encoded data.
- Wand – simple to use, but
requires training to ensure accurate
scanning.
- Non-Contact (Fixed Focus Optics,
Laser) – Can read data from
a distance.
- Laser Scanners – Depth of
field = minimum/maximum distance
laser can successfully read barcode.
- Directly related to barcode density/resolution
(printing)
Decoders
- Hardware or software used to translate
barcodes into alphanumeric data.
- Wedge – Emulates keyboard
input; plugs in between keyboard
and terminal.
- Software – Translates scanner
input via software that emulate
keyboard.
- Serial – Plugs in to computer
at communications (COM) port.
Computers
Normal computer system, either
standalone or networked.
Printers
- Dot Matrix – Low print quality,
low cost Low resolution barcodes
produce best results.
- Laser – High print quality,
high-to-medium cost. If application
requires high density barcodes,
600 or 1200 dpi is sufficient.
- Thermal Transfer – Very high
print quality, medium-to-high cost.
Most effective way to produce rugged
labels.
- Direct Thermal – Very high
print quality, low-to-medium cost.
Label is sensitive to heat/light,
and is recommended for indoor uses.
Label life is approximately 12 months.
- Bulk labels for thermal transfer
and direct thermal printers are
available in roll or fanfold options.
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Bar
Code Solutions
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Code - History
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