Calligraphic projection

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.

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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 Lissajous curve and calligraphy.