Calligraphic projection
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Calligraphic projection is a system, often used for laser lighting displays, whereby one or more laser beams draws an image on a screen by reflecting the laser beam from one or more mirrors attached to a deflecting mechanism.
Analog oscilloscopes have customarily employed this kind of vector graphics, as did a number of computer graphics terminals in the 1970s, such as the Tektronix 4014.
Calligraphic projection is sometimes called Lissajous projection, after the mathematical figure (and mathematician).
See also
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