Editing Laser lighting display (section)

=== Scanning ===
Laser scanners reflect the laser beam on small mirrors which are mounted on [[galvanometer]]s to which a control voltage is applied.  The beam is deflected a certain amount which correlates to the amount of voltage applied to the galvanometer scanner.  Two galvanometer scanners can enable X-Y control voltages to aim the beam to any point on a square. This is called vector scanning.  This enables the laser lighting designer to create  patterns such as [[Lissajous curve|Lissajous figures]] (such as are often displayed on [[oscilloscope]]s); other methods of creating images through the use of galvanometer scanners and X-Y-Z control voltages can generate letters, shapes, and even complicated and intricate images.  A planar or conical moving beam aimed through atmospheric smoke or fog can display a plane or cone of light known as a "laser tunnel" effect.