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• CCD Scanners have no moving parts. Lasers have oscillating mirrors that are subject to wear and mechanical failure.
• CCD Scanners use LEDs for illumination. LEDs have about ten times the life of laser diodes. Their illumination level is safe for direct viewing, so safety precautions are not necessary.
• CCD Scanners are generally smaller, lighter and less expensive than laser scanners.
• CCD Scanners have scan rates of 45 scans per second or faster, which is comparable to laser units.

• Laser Scanners can operate further from the barcode, with greater depth of field (operating Range). For this reason they are generally easier to use for an untrained operator. CCD scanners usually have to be within a few inches of the code. Lasers can be a foot or two away, depending on model.
• Laser scanners can read longer barcodes than CCDs. Because the scanner is further from the code, a laser scanner can have a wider sweep and therefore read longer code symbols. CCD units are usually limited to code lengths of three to four inches, depending on model.

A linear barcode is a combination of black and white bars of varying widths that can represent alpha and or numeric characters. For example, one narrow bar and two wide bars might represent the alpha character “a”. The encoding concept is very similar to Morse Code, except black and white bars are used in place of dots and dashes. Linear barcodes (also called standard barcodes) encode the data in a single line, horizontally. Here is an example of liner barcode that encodes the word “Godex.”

A two dimensional barcode encodes data both horizontally and vertically. Much more data can be compressed into a smaller space using a 2D barcode. Here is an example of a two dimensional symbology called PDF417 being used to encode the words;“GoDEX has a fantastic offering of very high quality competitively priced barcode printers.” That is a lot of information in a very small space.

The use of barcode technology delivers two very valuable benefits to the user; 1) speed and 2) accuracy. Instead of using a keyboard to type and input data into a system, barcodes and scanners can be used to do the same thing, at much faster speeds with exceptionally low error rates. These benefits of barcoding are best exemplified at a busy check-out counter at your neighborhood supermarket or busy super retail store like Costco.

GS1 is a leading global organization dedicated to the design and implementation of global standards and solutions to improve the efficiency and visibility of supply and demand chains globally and across sectors. The GS1 system of standards is the most widely used supply chain standards system in the world.

1. GS1 is a fully integrated global organization with over 30 years experience in global standards.
2. GS1 offers a range of productst, services, and solutions to fundamentally improve efficiency and visibility of supply and demand chains.