Here is a video comparison between the two types:
Wand / Pen Handheld Barcode Scanners:
CCD (charge-coupled device) barcode scanners come in both short and long range versions, and connect to a computer via a cable, usually to a USB port. They work off of the basis of a laser diode which was originally invented by the Japanese in 1987 and quickly took over the scanner market. Hundreds of tiny light sensors are lined up at the head of the reader, and essentially mimic the pattern of the barcode in order to decode it. Long range CCD scanners generally have the ability to read 1 and 2-dimensional barcode images.
Types of Two Dimensional barcode scanners:
Video camera readers:
This is one of latest 2D barcode imagers. They work on a similar basis to a CCD barcode reader, except that they have sensors arranged both vertically and horizontally. The lights flash onto the barcode, and create a digital picture of the code in order to read and decode it.
Smartphone and cellphone camera scanners:
As barcodes and barcode symbologies have improved over the years, barcode scanners and imagers have evolved with them. From humble beginnings like the pen scanner which could take minutes to scan just one barcode, to large industrial imagers that can decode a vast array of barcodes in milliseconds. With a barcode scanner basically now in the pocket of every smartphone user, who knows where the barcode will take us next?
By Cat Robinson
Sources and Further Reading: