Abstract: An optical system is presented for use in a near-eye mixed reality system. The system comprises a relay system defining an eyebox of the optical system, said relay system being configured and operable to relay a virtual image light field from a light-engine onto an eye pupil plane while combining said virtual image with real-world light field. The relay system is configured as a free space relay system configured for free space propagation of said virtual image light field being relayed, said free space relay system comprising at least one off-axis 4f-system. Each of said at least one off-axis 4f-system comprises at least one lens formed from at least one resonance-domain surface relief diffractive optical element (SRDOE) operable for combining said virtual image light field with the real-world light field, said at least one SRDOE being configured with a predetermined global surface relief pattern characterized by global variation of at least some of pattern parameters across said SRDOE.

Abstract: Devices and methods for 3D sensing are provided. The device comprising an optical device configured and operable to produce at least one structured light pattern, the optical device comprising a light source unit configured and operable to generate one or more light beams along predetermined one or more optical paths, and a diffractive optical unit accommodated in said one or more optical paths, at the output of said light source unit such that the diffractive optical unit faces the light source unit, the diffractive optical unit being non-periodic and two-dimensional and comprising at least one resonance-domain diffractive optical element configured to create 2D spatially variable pattern in a predetermined operative wavelength range, the diffractive optical unit being thereby configured and operable as a beam shaper for said one or more light beams to thereby create said at least one structured light pattern.

Abstract: Devices and methods for 3D sensing are provided. The device comprising an optical device configured and operable to produce at least one structured light pattern, the optical device comprising a light source unit configured and operable to generate one or more light beams along predetermined one or more optical paths, and a diffractive optical unit accommodated in said one or more optical paths, at the output of said light source unit such that the diffractive optical unit faces the light source unit, the diffractive optical unit being non-periodic and two-dimensional and comprising at least one resonance-domain diffractive optical element configured to create 2D spatially variable pattern in a predetermined operative wavelength range, the diffractive optical unit being thereby configured and operable as a beam shaper for said one or more light beams to thereby create said at least one structured light pattern.