A full set of POS system is integrated with POS software and hardware. POS hardware is included barcode scanner, receipt printer, cash drawer, barcode printer, customer display and others.
Barcode Scanner
Barcode Scanner is an electronic device for reading printed barcodes. Currently, the four different types of bar code readers available are the pen type readers (bar code wands), laser bar code scanners, CCD (Charge Couple Devices) barcode readers and camera based barcode readers. Here we will compare the laser and CCD barcode scanners.
- Laser Barcode Scanners
Laser barcode scanners use a laser beam as their light source, and typically employ either a reciprocating mirror or a rotating prism to scan the laser beam back and forth across the bar code. As with the pen type bar code reader, a photo diode is used to measure the intensity of the light reflected back from the bar code.
- CCD Barcode Scanners
CCD barcode scanners use an array of tiny light sensors lined up in a row in the head of the barcode reader. Voltage waveform corresponding to the bars and spaces of the bar code is generated and sent to the decoder, which decodes the data and sends it to the computer. The main difference between a CCD barcode scanner, a pen type barcode scanner, and laser barcode scanner is that the CCD barcode scanner measures emitted ambient light from the bar code whereas pen or laser barcode scanners measure reflected light of a specific frequency originating from the scanner itself.
For CCD barcode scanners their are two primary limitation; first it has a short "read" range, and must be held no more than 1 to 3 inches from the bar code. Further, the CCD has a limited width, and will not read bar codes that are wider than the face of the scanner.
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