Flatbed scanners use a light source, which passes across the print (or negative) to be scanned.

The light reflected is focused via a Charged Couple Device (CCD) that is composed of microscopic photoelectric cells. These cells then convert the light into electric voltage. The voltage is then converted into digital information via an analogue to digital converter chip.

The CCD array scanner is operated via the scanner driver software. This is installed in the host computer.

There are a wide variety of CCD scanners available most of which are A4 although A3 equipment is becoming more and more available. Some scanners have transparency scanning facilities for instance special CCD array film scanners are produced for colour transparency and negative scanning.

Some topics in this essay:
Green Blue, RAM Storage, , Device CCD, A4 A3, Linear Linear, Colour CCD, Blue Masking, ccd array, green blue, red green, red green blue, Red Green, operated via, ccd scanners, via scanner, via scanner driver, operated via scanner, scanner driver, digital camera, scanner driver installed, fine tune file, analogue digital, digital converter,