Depth camera assembly using fringe interferometery via multiple wavelengths

A system comprising:

• an illumination source configured to emit light comprising a series of spatially periodic illumination patterns into a local area surrounding the illumination source, each periodic illumination pattern having a common spatial frequency, a different phase shift, and a different wavelength;
• a sensor separated from the illumination source by a specific distance and coupled to the illumination source, the sensor comprising:
• a plurality regions of pixels, each region of pixels configured to capture intensity information based on light having a specific wavelength from the local area, different regions capturing intensity information based on different wavelengths of pixels, wherein a region capturing intensity information from a particular wavelength captures intensity information during a time interval when the illumination source emits a periodic illumination pattern having the particular wavelength and regions capturing intensity information from other wavelengths do not capture intensity information during the time interval,
• a first region configured to capture intensity information from light having a first wavelength emitted by the illumination source while the illumination source emits a periodic illumination pattern having the first wavelength and not to capture intensity information while the illumination source emits one or more periodic illumination patterns having wavelengths other than the first wavelength;
• and
• a second region configured to capture intensity information from light having a second wavelength emitted by the illumination source while the illumination source emits an illumination pattern having the second wavelength and not to capture intensity information while the illumination source emits one or more illumination patterns having wavelengths other than the second wavelength.

An apparatus comprising:

• a plurality of pixels, each pixel configured to capture intensity information based on light from the local area;
• a set of optical filters each positioned to correspond to a region including adjacent pixels of the plurality of pixels, an optical filter configured to pass light having a specific wavelength emitted by the illumination source to the pixels included in the region corresponding to the bandpass filter, where different optical filters pass different wavelengths of light emitted by the illumination source to corresponding regions;
• a first region configured to capture intensity information from light having a first wavelength emitted by an illumination source into the local area while the illumination source emits a spatially periodic illumination pattern having the first wavelength and not to capture intensity information while the illumination source emits one or more periodic illumination patterns having wavelengths other than the first wavelength;
• and
• a second region configured to capture intensity information from light having a second wavelength emitted by the illumination source into the local area while the illumination source emits a periodic illumination pattern having the second wavelength and not to capture intensity information while the illumination source emits one or more periodic illumination patterns having wavelengths other than the second wavelength.

An apparatus comprising:

• a plurality regions of pixels, each region of pixels configured to capture intensity information based on light having a specific wavelength from the local area, different regions capturing intensity information based on different wavelengths of pixels, the plurality of regions communicatively coupled to an illumination source configured to emit illumination patterns having different wavelengths at different times,
• wherein a region capturing intensity information from a particular wavelength captures intensity information during a time interval when the illumination source emits a periodic illumination pattern having the particular wavelength and regions capturing intensity information from other wavelengths do not capture intensity information during the time interval, and
• the plurality of regions of pixels including:
• a first region configured to capture intensity information from light having a first wavelength emitted by the illumination source while the illumination source emits a spatially periodic illumination pattern having the first wavelength and not to capture intensity information while the illumination source emits one or more periodic illumination patterns having wavelengths other than the first wavelength;
• and
• a second region configured to capture intensity information from light having a second wavelength emitted by the illumination source while the illumination source emits a periodic illumination pattern having the second wavelength and not to capture intensity information while the illumination source emits one or more periodic illumination patterns having wavelengths other than the second wavelength.