Constant velocity scanning apparatus

Details Constant velocity scanning apparatus Constant velocity scanning apparatus

1989-02-06

1991-11-19

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

G02B 2608

Patent

active

050660845

ABSTRACT:
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.

REFERENCES:
patent: 4123146 (1978-10-01), Dragt
patent: 4389101 (1983-06-01), van Rosmalen
patent: 4828347 (1989-05-01), Keiser

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