A Quick View At A Barcode Scanner

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					A Quick View at the Barcode Scanner




A barcode reader is also known as the barcode scanner and it is that electronic
machine that is used to scan and read the printed barcodes that are attached on the
products in a retail store. This has a little similarity to a flatbed reader; the machine
includes a lens, a light source and a light sensor which translates the optical
impulses into the electrical ones. To add to that all the barcode scanner leaving a
few have a decoder circuit that analysis the barcode image and the data generated
through that is sent to the computer which converts the data and give the final
product.

Various Kinds of Barcode Scanners

The Pen style readers

The first kind of barcode reader is the Pen style scanner which includes a light
source and a photodiode that are placed alongside each other in the tip of the wand.
So to scan the barcode image the person standing at the point of sale should move
the pen across the bars of the barcode at a uniform speed. The PEN stylebarcode
scanner has a photodiode that is used to measure the intensity of the light that is
reflected from the light source as the tip is moved across each bar and space in the
given printed code.
Laser scanners

This kind of reader works in a similar fashion as that of a pen style barcode reader,
the only difference that exists is the laser beam is used as a source of light and that
it has a reciprocating mirror or a prism if the mirror is not available just so to rotate
and scan the front and back across the barcode.

CCD readers

A CCD barcode scanner puts in use a multitude of tiny little light sensors that are
lined up in a row which is at the head of the scanner. Each sensor has a function to
measure the light intensity that is in front of them during that time.

Camera-based readers

The latest barcode scanner is the ones that we use in our mobile phones and are
camera based. There are two dimensional imaging scanners. It employs the image
processing feature to scan the barcode.

Another kind of scanner is the video camera scanner that uses a small video
camera that uses the CCD technology in the scanner, and rather than a single row
sensor the video camera has a multitude of sensors that is arranged in a two
dimensional pattern so that an image of the barcode can be generated.

Omni-directional barcode scanners

In an Omni directional scanner an array of straight or curved scanning lines with
different directions are arranged in the form of a starburst, or a multi angle pattern
which is projected at a symbol and one or even more of them will be able to scan
all the spaces and the bars, irrespective of their orientation.
These scanners consist of a laser. It generates an array of beams leading to
different orientations which allows them to scan the barcode at any angle.

Summary
A barcode scanner is a device that is used to read the barcode that are attached to
the items in a retail store. There are many kinds of barcode scanners available
which can be stationary or they can be handheld.

Author
Mr. Priyankar Baid is the owner of the website www.smessauda.com and on his
site all the equipment that are related to the POS System are available, machines
such as a receipt printer, a billing machine, etc.

				
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posted:9/11/2013
language:English
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