Information on Barcodes Generators & Scanners

Barcode Scanners are hand-held or stationary devices used to read information contained in a barcode. These devices are connected to a computer through any type of port. Scanners cannot do calculations; they only capture the barcode into letters or numbers. Information, once fed into a computer is processed by the computer’s software. A barcode scanner consists of a code reader and decoder. The reader throws light on a barcode and measures the amount of light that is reflected back by the barcode. This light energy is converted into electrical energy by a scanner. The electrical energy in turn is changed into data in the computer.

Barcode scanners are available in many different varieties. They can be hand held and hands free, wearable, rugged, scan engines, laser or digital. Pen-wand scanners are perhaps the simplest types of such devices. They have to be kept in direct contact with the barcode and held at a precise angle. A pen-wand scanner is moved over the bar to read it. General purpose scanners are generally used at checkout counters and hospitals and are also used to process identification documents. Certain other kinds of scanners, like rugged scanners, are generally used in harsh or extreme conditions.

Another major distinction of barcode scanners is that of an image scanner and a laser scanner. A camera reader is embedded in an image scanner. The camera captures the barcode images, which are then processed by sophisticated image techniques to decode the barcode. An image scanner can read a barcode from four to ten inches away. Laser scanners use lenses to read the codes. Laser scanners enjoy the advantage of reading the bar even from a distance of 24 inches. Moreover a laser scanner can be positioned at any angle to read a barcode. With the advancement of technology, modern laser scanners can read the barcodes with ease from a distance of 30 feet.

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Norman Woodland, a 27-year-old graduate student at Drexel Institute of Technology in Philadelphia developed the first code system that automatically read product information during checkout. Woodland and his friend Silver were awarded a patent for their application titled Classifying Apparatus and Method on October 7, 1952. Many experts are of the view that the Woodland and Silver bar code was the basis of what would soon become a global phenomenon.

In the beginning, barcodes were developed to store data in the spacing of printed parallel lines. The idea was to help grocery stores speed up the checkout process and keep better track of the inventory. However, the system soon picked up and became a success story.

Barcodes form the basis of identification in almost all types of businesses in the modern world. Barcodes are variously called as Universal Product Codes or UPCs. These are machine-readable codes and come in strips, generally comprising of a series of short black lines of varied thickness. These codes are read by optical scanners called barcode readers or scanned from an image by special software. A laser reader or scanner can translate the barcodes into the corresponding alpha-numeric digits, which are used to uniquely identify a piece of property. Barcodes are used world over to implement Auto ID Data Capture (AIDC) systems that improve the speed and accuracy of computer data entry.

At present, we have codes in several patterns of dots, concentric circles and hidden in images. Barcodes are provided by a body called Uniform Code Council (UCC). A manufacturer has to apply to the UCC for permission to enter the UPC system. An annual fee is charged for the service. In return, the UCC issues the manufacturer a six-digit manufacturer identification number. The manufacturer identification number is part of a standard 12-digit bar code.

Bar coding standards have brought about great precision, technical refinement and uniformity in the way business is conducted in the world. Throughout the world, most of the data entry is done much more quickly. All data is collected in real time. Bar codes have also led to the elimination of manual data entry and retrieval system. The coding has completely streamlined products, making the most effective use of human and physical resources.

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