CCD
CCD (Charged Coupled Device) is a collection of light-sensitive components Photodiodes, which convert light into electrical charges and are used in various devices such as scanners, Digital cameras or camcorders can be used to digitize templates. In scanners there is a line with so-called CCD elements, with a CCD cell storing its transfers charge to the next cell. In doing so, she becomes herself with the charge of her other neighbors filled. The CCD elements convert the light reflected from the template into a light that the computer can understand tension around.