Tilt mirror controlling apparatus and method

Details Tilt mirror controlling apparatus and method Tilt mirror controlling apparatus and method

2006-02-07

2006-02-07

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S290000

Reexamination Certificate

active

06995896

ABSTRACT:
The apparatus controls a tilt angle of a tilt mirror in high speed with high stability, realizing non-linearity compensation. The apparatus includes: a control signal producing unit, which produces a control signal, for feed-forward controlling of the mirror into a target tilt angle, based on a parameter that determines the target tilt angle; a digital filter for removing a resonance frequency component, which is caused by an angle response of the tilt mirror, in the control signal, which is produced by the control signal producing unit; and a square root calculating unit for performing digital square-root calculation so that non-linearity of the control signal, from which the resonance frequency component has been removed, is compensated for.

REFERENCES:
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patent: 5629794 (1997-05-01), Magel et al.
patent: 2004/0125431 (2004-07-01), Mehrl
patent: HEI 2-241380 (1990-09-01), None
patent: HEI 9-101467 (1997-04-01), None
patent: HEI 9-159937 (1997-06-01), None
patent: HEI 10-142529 (1998-05-01), None

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