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Barcode reader
A barcode reader or barcode scanner is an optical scanner that can read printed barcodes, decode the data contained in the barcode to a computer.
What is a barcode scanner?
Barcode scanners record and translate barcodes from the image you recognize into alphanumeric digits. The scanner then sends that information along to a computer database, either through a wired connection or wirelessly (depending on the model).
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What is the brief history of barcode scanner?
The first barcode, with a design like a bullseye, was invented in 1948 by two Drexel University students named Norman J Woodland and Bernard Silver. They were interested in tackling the problems of the supermarket industry, which sorely needed a better method of inventory management and customer check-out.
Where are barcodes used?
Barcodes are applied to products as a means of quick identification. They are used in retail stores as part of the purchase process, in warehouses to track inventory, and on invoices to assist in accounting, among many other uses.
What are the main types of barcode scanners?
There are five main types of barcode readers. These are pen wands, slot scanners, Charge-Couple Device (CCD) scanners, image scanners, and laser scanners.
Pen Wand
This is the simplest type of barcode reader and the least expensive. It is durable and has no moving parts. It must remain in direct contact with the barcode and also needs to be held at a certain angle in order to pick up the data. A certain speed at which it moves over the barcode is also required.
Slot Scanner
This is a stationary barcode scanner and the item being scanned is pulled by hand through the slot on the barcode reader device. This type of barcode reader is usually used for scanning the barcodes on identification cards and cards that are swiped.
CCD Scanner
This type of barcode reader is typically used in retail sales. It has a better range than the pen wand and has a gun type interface. It has to be held close to the barcode in order to read it. Several readings are usually taken to reduce errors. The disadvantage to using this type of barcode reader is that it can only read barcodes that are the width of it’s face size.
Image Scanner
This type of barcode reader can also be called a camera reader. It features a small camera that is used to capture an image of the barcode. It can read barcodes from further away and has digital imaging processors that read the bar codes. It can be used to read barcodes from as far away as 9 inches.
Laser Scanner
This type of barcode reader can be handheld or stationary. It doesn’t have to be close to the barcodes to read them. This model uses mirrors and lenses to read the barcode and can be used up to 24 inches away and there are long range models that can read barcodes up to 30 feet away. It can also read barcodes no matter what their orientation is. Laser scanners can perform up to 500 scans per second.
