Stabilizing oscillation amplitude of torsion oscillator at...

Details Stabilizing oscillation amplitude of torsion oscillator at... Stabilizing oscillation amplitude of torsion oscillator at...

2011-05-31

2011-05-31

Font, Frank G (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S213100, C359S225100

Reexamination Certificate

active

07952779

ABSTRACT:
A control method of stabilizing the oscillation amplitude of a torsion oscillator is described. The method includes the steps of: driving a torsion oscillator at a predetermined frequency with a drive energy level by a control module to generate a scanning angle of the incident light beam, wherein the drive energy level is associated with the predetermined frequency; comparing the scanning angle corresponding to the drive energy level with a designate scanning angle by the control module; and adjusting the drive energy level based on the comparison result until the scanning angle of the torsion oscillator is equal to the designate scanning angle.

REFERENCES:
patent: 6838661 (2005-01-01), Klement
patent: 2004/0120023 (2004-06-01), Bush et al.
patent: 2005/0030605 (2005-02-01), Cannon et al.

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