The wide range of handhelds barcode readers offer users a variety of choices for their data collection activities. Product sets offer conventional laser, linear or area imaging technology, plus a variety of features to meet specific scanning needs.
Laser scanners 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, CCD readers use an array of hundreds of tiny light sensors lined up in a row in the head of the reader. Each sensor measures the intensity of the light immediately in front of it. The important difference between a CCD reader and a laser scanner is that the CCD reader is measuring emitted ambient light from the bar code whereas a laser scanner is measuring reflected light of a specific frequency originating from the scanner itself.
Two-dimensional imaging scanners use a camera and image processing techniques to decode the bar code and allow excellent reads on both 1D and 2D barcodes