Devices which display an object's outward appearance


  • Cameras & photography - objects for the recording of visual images
  • Focusing - changing the image point to change where light rays converge
  • Holography - an image recording technique that allows the recorded image to change as the viewer changes their position, creating the illusion that the image is three-dimensional
  • Image storage - the saving and storage of digital images
  • Infrared imaging - recording images that are visible at wavelengths longer than visible light (.74 micrometers)
  • Magnetic resonance imaging - or MRI, imaging that uses nuclear magnetic resonance to image nuclei inside a body
  • Microscopy - using microscopes to see objects smaller than those that can be seen with the human eye, including optical, electron, and scanning probe
  • Motion pictures - a series of images played in succession to give the illusion of movement
  • Optical imaging - the use of photons and lasers to obtain images inside a body
  • Radiography - the use of X-Rays to view non-uniformly composed materials