What are the different types of scanners available?
• Flatbed scanners, also called desktop scanners, are the most versatile and commonly used scanners. • Sheet-fed scanners are similar to flatbed scanners except the document is moved and the scan head is immobile. A sheet-fed scanner looks a lot like a small portable printer. • Negative scanners are scanners designed and optimized to scan film. Depending on the scanner, negatives, positives, black and White or Color film can be scanned. The real test for a film scanner is how well it can produce an image from color negative film, due to the film’s inherent latitude and the differences between the densities and contrast of the cyan, magenta, and yellow layers. • Drum scanners are used by the publishing industry to capture incredibly detailed images. They use a technology called a photomultiplier tube (PMT). In PMT, the document to be scanned is mounted on a glass cylinder. At the center of the cylinder there is a sensor that splits light bounced from the document into three beams. Each
