Patent ID: 6479811
Filing Date: 2002-11-12
Classification: G02B

Abstract:
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.