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METHOD AND APPARATUS FOR CALCULATING A DISTANCE BETWEEN AN OPTICAL APPARATUS AND AN OBJECT

  • US 20110176709A1
  • Filed: 07/16/2010
  • Published: 07/21/2011
  • Est. Priority Date: 01/21/2010
  • Status: Active Grant
First Claim
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1. A method of extracting distance information, the method comprising:

  • projecting a plurality of different lights onto an object;

    modulating, by a light modulator having a gain, reflected lights reflected from the object into modulated images;

    detecting, by a photodetector, the modulated images and obtaining from the modulated images a plurality of intensity images respectively corresponding to the plurality of different lights;

    obtaining a phase delay of each of the reflected lights from the plurality of intensity images; and

    calculating a distance to the object from the obtained phase delay,wherein the obtaining of the phase delay comprises referring to a lookup table that stores information obtained by measuring the waveforms of the plurality of different lights and the gain of the light modulator.

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