Patent ID: 11915437
Assignee: META PLATFORMS TECHNOLOGIES, LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. A method comprising:
emitting, from a broadband light source, light having wavelengths within a range of from about 400 nm to about 800 nm;
projecting, with a projector device, a plurality of light regions into an imaging environment external to the projector device, the plurality of light regions comprising a plurality of separate wavelength ranges, each of the plurality of light regions comprising a portion of emitted light having wavelengths within one of the plurality of separate wavelength ranges and isolated from other portions of the emitted light having wavelengths within other separate wavelength ranges of the plurality of separate wavelength ranges, wherein the plurality of separate wavelength ranges is produced by a diffractive optical element that is included in the projector device and that separates the light emitted from the broadband light source into the plurality of light regions;
wherein the emitted light is incident on an interference filter that:
passes light having wavelengths within each of the plurality of separate wavelength ranges; and
blocks light having wavelengths outside the plurality of separate wavelength ranges and wavelengths between two or more of the plurality of separate wavelength ranges;
receiving, by an imaging device, reflected light from the plurality of light regions; and
processing, by a processing device, the reflected light from the plurality of light regions to determine three-dimensional characteristics of the imaging environment or of the imaging device.