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Method and system for calibrating a diffractive grating modulator

  • US 6,479,811 B1
  • Filed: 03/06/2000
  • Issued: 11/12/2002
  • Est. Priority Date: 03/06/2000
  • Status: Expired due to Term
First Claim
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1. A diffractive grating modulator system, comprising:

  • a) a diffractive grating modulator active to produce a plurality of output orders of diffraction;

    b) an illumination source for directing light onto the diffractive grating modulator;

    c) an output system arranged to receive one of the orders of diffraction from the diffractive grating modulator;

    d) a detector arranged to receive a different one of the orders of diffraction from the diffractive grating and to produce a signal representing the output of the diffractive grating modulator;

    e) an electronic driving system responsive to a data stream for operating the diffractive grating modulator; and

    f) a feedback system connected to the detector and the electronic driving system and responsive to the signal for calibrating the diffractive grating modulator.

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