Patent ID: 9696211
Date: 2017-07-04
CPC Classifications: G01B,G01J,G02F

Claim:
1. A time-modulated light source for spectrally controlled interferometric measurements comprising: a temporally coherent monochromatic light source; an optical modulator receiving an output of the monochromatic light source; and a waveform generator supplying a driving signal that causes the optical modulator to produce a predetermined output of time-modulated light beam; wherein said time-modulated light beam, when injected into an interferometer, comprises a plurality of different frequencies producing corresponding interference-fringe signals during sequential fractions of an integration time of a detector of the interferometer, so as to form a multiplexed correlogram pattern corresponding to a superposition of said interference-fringe signals produced during the integration time; and wherein said optical modulator is configured to modulate said output of the monochromatic light source in an optical frequency domain to produce a predetermined spatial pattern of interference fringes with a single peak localized within a measurement space of the interferometer.