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What is a barcode reader?

A barcode reader scans and processes barcode data. Types include:

  • Pen Reader: Uses LED (red or infrared) to illuminate the barcode; the reflected light is interpreted via a phototransistor.
  • Laser Scanner: A laser beam is swept across the barcode, and the reflection is interpreted via mirrors and lenses.

 

Handheld scanners are the most common form, used in warehouses and retail.

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