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Showing posts from April, 2018

An Overview of the Barcode Scanners

A barcode scanner or reader is the electronic equipment, which can read as well as output the printed barcodes to the computer. It comprises of a lens, light source as well as a light sensor that translates the ‘optical impulses ‘into electrical impulses. Most of the barcode scanners contain the decoder circuitry that analyzes the ‘image data’ of the barcode provided by the sensor and by sending the content of the barcode to the output port of the scanner. Types of Barcode Scanners on the Basis of the Technology Employed   ‘Pen-Type’ Scanners:  The pen-type barcode scanners comprises of photodiode and light source that is placed at the tip of the wand or pen. The photodiode present in the scanner measures light intensity reflected back from ‘light source’ as the barcode tip crosses the space in printed code and each bar.    Laser Scanners: The laser scanners work in the same way as the pen-type scanners and the only difference is that they make use of the laser beam as the