What are Barcode Scanners?
Barcode scanners are devices which use some sort of light-emitting device and a photo conductor to read barcodes. They are usually designed to attach to a computer, via either PS2 or some other interface, though they may also be used on their own and store the data for future retrieval by a computer. Barcodes are simple visual representations of data which can be transferred to a computer via a barcode scanner. Traditional barcodes consist of parallel lines, but a number of variations now exist, including scatterings of dots and embedded codes hidden within images. Barcodes were first conceived in the late 1940s and became widely implemented starting in the early 1970s. The first product sold with a barcode was a pack of Wrigley’s Juicy Fruit gum, at Marsh’s supermarket in Ohio, one of the first stores to implement barcode scanners. The gum now belongs to the Smithsonian and symbolizes a key moment in US history. Barcode scanners typically utilize a laser scanner, though LED and imagin
A Barcode Scanner (or barcode reader) is a computer peripheral for reading barcodes printed on various surfaces. A barcode reader consists of a scanner, a decoder (either built-in or external), and a cable used to connect the reader with a computer. Additionally, nearly all barcode readers currently produced contain decoder circuitry analyzing the barcode’s image data provided by the photo conductor and sending the barcode’s content to the scanner’s output port. Types of Barcode Scanners: – By Technology: – Pen type readers: Pen type readers consist of a light source and a photodiode that are placed next to each other in the tip of a pen or wand. To read a bar code, tip of the pen moves across all the bars in a steady even motion. Laser scanners: Laser barcode scanners work the same way as pen type readers except that they use a laser beam as the light source and typically employ either a reciprocating mirror or a rotating prism to scan the laser beam back and forth across the bar code
A Barcode Scanner (or barcode reader) is a computer peripheral for reading barcodes printed on various surfaces. A barcode reader consists of a scanner, a decoder (either built-in or external), and a cable used to connect the reader with a computer. Additionally, nearly all barcode readers currently produced contain decoder circuitry analyzing the barcode’s image data provided by the photo conductor and sending the barcode’s content to the scanner’s output port. Types of Barcode Scanners: – By Technology: – • Pen type readers: Pen type readers consist of a light source and a photodiode that are placed next to each other in the tip of a pen or wand. To read a bar code, tip of the pen moves across all the bars in a steady even motion. • Laser scanners: Laser barcode scanners work the same way as pen type readers except that they use a laser beam as the light source and typically employ either a reciprocating mirror or a rotating prism to scan the laser beam back and forth across the bar
