Structured light projection with local control of polarization properties

原文（中国語）

An optical projection device includes an emitter, which is configured to emit a beam of coherent light. An optical substrate is disposed in a path of the beam. A metasurface is disposed on the optical substrate and includes an array of diffractive structures configured to modulate a polarization of the light so as to project a far-field pattern of interleaved areas having different, respective degrees of polarization.