raster scan



  • noun one sweep of the picture beam horizontally across the front of a CRT screen


  • A technique or technology for generating, recording, or presenting images, in which a beam is swept across a raster. In a CRT, for instance, the intensity of the electron beam is varied depending on the color and brightness a given pixel will have within the overall image.
  • In radars, horizontal or vertical scanning one line at a time to obtain the desired coverage, such as that having a desired shape, or encompassing a given plane.