DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
Charge-coupled device, coloured scanning electron micrograph (SEM). This is a top view of the individual picture elements. A charge-coupled device (CCD) is a sensor used to record images. It consists of an integrated circuit containing an array of linked, or coupled, capacitors. They are used in digital cameras, optical scanners and in astronomical telescopes. Magnification: x2275 when printed at 10 centimetres wide.
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