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Since continuous Time-Of-Flight ranging systems based on electrical mixing run into fundamental limits we designed an optical MEMS (de)modulator/mixer. With our dynamic (MHz range) subwavelength pitch diffraction grating we demonstrated TOF ranging with optical mixing.
We present a time-of-flight (TOF) ranging experiment based on optical mixing. The key component in this experiment is the optical (de)modulator. consequently we also report on the design, fabrication, and characterization of a microelectromechanical system diffractive grating (de)modulator with a subwavelength period. The obtained results are an important step toward an optical mixing based TOF 3-D...
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