Constant velocity scanning apparatus

Details Constant velocity scanning apparatus Constant velocity scanning apparatus

G - Physics

02

B

341/88, 88/96

G02B 17/06 (2006.01) G02B 26/10 (2006.01) H04N 1/028 (2006.01) H04N 3/08 (2006.01) H04N 3/10 (2006.01)

Patent

CA 2003630

ABSTRACT OF THE DISCLOSURE The present invention relates to an optical scanner of a design whereby mechanical wearing parts are minimized. This is accomplished by using piezoelectric actuators to supply thrust energy to move the reflecting mechanism of the scanner and using a corresponding and cooperating piezoelectric actuator at the other extreme of movement of the reflector to sense the amount of impact for use in calculating the energy to be supplied for a return thrust. The magnitude of energy required is minimized by using contact pads between the scanner and the actuators which effectively operate as short-stroke springs whereby the actuators only need to supply the energy losses in the pads and from windage and bearing friction.

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