What Is A Barcode Scanner?

Date First Published: 31st August 2023

Topic: Computer Systems

Subtopic: Computer Hardware

Article Type: Computer Terms & Definitions

Difficulty: Medium

Difficulty Level: 4/10

CONTENTS

Uses Of Barcode Scanners
Types Of Barcode Scanners

Learn about what a barcode scanner is in this article.

A barcode scanner, also known as a barcode reader, or point-of-sale (POS) scanner is an input device that can capture information from a barcode. Once scanned, the barcode scanner captures and translates the barcode into numbers and/or letters to the computer which is translated into readable information.

To ensure that barcode scanners can read barcodes properly, the barcodes need to be clean with no smudges, dirt, or scratches, printed clearly, and the correct size for the scanner being used. Barcode scanners increase accuracy and reduce the chances of human error as data does not have to be manually entered. They also allow inventory to be verified and the system to be automatically updated.

Uses Of Barcode Scanners

Barcode scanners are often used for POS systems and inventory management. Barcode scanners are used to capture product information in retail POS systems so that it is added to the customer's purchase total. When barcodes on items are scanned, they are matched to a database of products on the computer, returning the price.

Barcode scanners can also be used to track products. For example, inventory management systems use barcode scanners to track products from the time they are received in the warehouse until they are shipped out.

Types Of Barcode Scanners

Different types of barcode scanners include:

Pen wand barcode scanners - The simplest and least expensive type of barcode scanner. They contain no moving parts and are often used to scan barcodes that are printed on paper labels, like packages. The tip of the pen must touch the barcode.
Slot scanners - A stationary scanner that requires items to be manually pulled through the slot. Slot scanners are often used to scan barcodes on identification cards.
Laser scanners - These are handheld barcode scanners that use a laser to read a barcode up to 24 inches away. They use a laser beam as a light source and use oscillating mirrors or rotating prisms to scan the laser beam back and forth across the barcode.
CCD (charge-coupled device) scanners - These capture barcodes by converting photons to electrons. Several readings are taken to reduce the chances of errors each time a reading is scanned.
Image scanners - These use camera and image processing techniques to read the information in a barcode around 3 to 9 inches away. They cost less than laser scanners.
3D scanners - These create a 3D image of the bar code, allowing it to be read from any angle. The most common type of 3D barcode is a QR code.