Laser Barcode Scanners Vs Imaging Barcode Scanners

There are several different types of barcode scanners on the market

. Those of the most common are the laser scanner and the imaging scanner. Each type of scanner is best suited for specific types of applications.

The laser scanner emits a laser beam, usually red in color, across the code it is scanning. Laser scanners can typically read codes from a variety of distances ranging from right up close up to several feet away from the code. Since they emit a laser beam, the lighting conditions in the room they are scanning aren't a big factor. This is especially important when scanning products in a warehouse on racking where lighting conditions may not be ideal.

Laser scanners are used to read linear barcodes, which are the most common type of barcode we have all seen at the grocery store with the black bar lines on a white background. The laser scanner shines a laser beam across the barcode lines and a photodiode reads the linear code. The angle at which the code is scanned doesn't have to be exactly perpendicular to the code lines, and in most cases the code does not have to be printed on a perfectly flat object.

These types of scanners can be used to read all kinds of linear barcodes ranging from product codes such as UPC codes, to shipping label codes to patient wristband codes at a hospital. Laser scanners are limited to reading linear bar codes. They can't scan 2D codes which more commonly look like a square with dots in it.

Imaging scanners work by capturing an image of the code being scanned and then interpreting that image. They work similarly to a digital camera, taking a "picture" of the code and then interpreting it.

Imaging scanners are not limited to scanning only linear codes. They are also capable of scanning 2D codes such as PDF417, Aztec Code, or QR Codes. The type of codes they are capable of reading is one of the biggest differences between laser scanners and imaging scanners. Imaging scanners do tend to cost more than laser scanners so if you are looking to purchase a scanner it is best to understand what type of codes you'll be scanning before making a buying decision.

For most retailers looking to scan standard linear barcodes such as the UPC codes on products, a laser scanner is sufficient, unless of course you have a very specific need to utilize and read 2D codes.

Laser Barcode Scanners Vs Imaging Barcode Scanners

By: Nelson J. Packard

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