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Description

• An electronic device used for reading printed bar codes.
• Consists of light source, lens, and light sensor for translating optical impulses into electrical ones.
• Also consists of decoder circuitry to analyze the barcode image data provided by sensor.
• This bar code identifies the product to the supermarket computer which has latest description and price.
• Computer automatically tells the electronic cash register the price.
• These are easy to use and widely used in electronic shops and malls.

Types

• Pen type readers
• Laser scanners
• CCD readers
• Camera-based readers
• Omni-directional barcode scanners
• Cell phone cameras