Apparatus and method for calibrating a reflecting mirror

Details Apparatus and method for calibrating a reflecting mirror Apparatus and method for calibrating a reflecting mirror

2006-06-07

2009-08-04

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231100

Reexamination Certificate

active

07569805

ABSTRACT:
An apparatus for measuring the position of the mirror of a diffractive light modulator and performing positional compensation, and a method of controlling the apparatus. A position measurement unit measures the position of a mirror of the diffractive light modulator. A control unit calculates the value of displacement from a reference position by evaluating a position value calculated by the position measurement unit, calculates a compensation value and outputs a compensation control signal. A compensation and actuation unit performs compensation on a drive voltage in response to the compensation control signal, and actuates the mirror of the diffractive light modulator using the compensated drive voltage.

REFERENCES:
patent: 6479811 (2002-11-01), Kruschwitz et al.
patent: 6898377 (2005-05-01), LeHoty et al.
patent: 2001-296482 (2001-10-01), None
patent: 10-2005-0043801 (2005-05-01), None

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