ABSTRACT
Optical scanning is familiar to the general public through such widespread applications as supermarket
barcode scanners, desktop colour scanners, laser lightshows and desktop laser printers. However,
scanning technology is also applied to commercial printing processes, thermal imaging, medical
diagnostic equipment, biochemical analysis, and quality control of such diverse items as sheet steel,
drawn wire, windshield glass, semiconductor wafers and rice-to name just a few of the many
applications.
