The present invention provides a reflective polarized-light separating diffraction-element usable in a wide wavelength region including an ultraviolet region, and an optical measurement device comprising the same. The reflective polarized-light separating diffraction-element comprises: a substrate (1); a reflection surface (2) formed on a surface of the substrate (1); and a lattice structured body assembly (3) that is provided on the reflection surface (2) and shows a form birefringence (Δn*). The lattice structured body assembly (3) consists of lattice structured bodies (3A, 3B, 3C and 3D) of four patterns having lattice structures of different azimuths. The lattice structured bodies (3A, 3B, 3C and 3D) of a plurality of patterns are aligned on the reflection surface 2 in a predetermined direction such that the azimuths of the lattice structures change in a structurally periodic manner.

A display system is disclosed for use in an augmented reality display (30), the system comprises a waveguide (32) having a front surface and a rear surface. A front input projector (34) projects polychromatic light through a front surface, and a back input projector (36) projects polychro matic light through the rear surface. Input light impinges on an input grating (38) on a rear surface of the waveguide (32), and light travels through the waveguide by total internal reflection. An output grating (40) is provided for coupling light out of the waveguide. A plurality of front and back input projectors (34, 36) are provided in a staggered configuration along the width of the waveguide (32) and respective edges of adjacent front and back input projectors are aligned along the width of the waveguide to permit a continuous projection of light.

A lidar system includes one or more light sources configured to generate a first beam of light and a second beam of light, a scanner configured to scan the first and second beams of light across a field of regard of the lidar system, and a receiver configured to detect the first beam of light and the second beam of light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror that includes multiple reflective surfaces angularly offset from one another along a periphery of the polygon mirror, the reflective surfaces configured to reflect the first and second beams of light to produce a series of scan lines as the polygon mirror rotates. The scanner also includes a pivotable scan mirror configured to (i) reflect the first and second beams of light and (ii) pivot to distribute the scan lines across the field of regard.

An optical transmitting apparatus is disclosed, in the apparatus, an array light source include M*N light sources, and an included angle between any column of light sources in the N columns of light sources and any row of light sources in the M rows of light sources is a preset angle. The array light source is located on a first side of a collimating lens, a plane on which the array light source is located is perpendicular to an optical axis of the collimating lens, and a distance between the plane on which the array light source is located and a center point of the collimating lens is a focal length of the collimating lens. An rotatable scanning mirror is located on a second side of the collimating lens, and a center point of a reflective surface of the scanning mirror is on the optical axis of the collimating lens.

A collimated backlight and an electronic display employ a light guide having angle-preserving scattering feature and an absorption collimator. The angle-preserving scattering feature is configured to scatter a portion of guided light out of the light guide as emitted light. The absorption collimator includes an absorption element and is configured to convert light provided by a light source into collimated light to be guided as the guided light. The electronic display includes an array of light valves and may be configured as a multiview display or a privacy display.

Disclosed is an illumination arrangement for spectrally shaping a broadband illumination beam to obtain a spectrally shaped illumination beam. The illumination arrangement comprises a beam dispersing element for dispersing the broadband illumination beam and a spatial light modulator for spatially modulating the broadband illumination beam subsequent to being dispersed. The illumination arrangement further comprises at least one of a beam expanding element for expanding said broadband illumination beam in at least one direction, located between an input of the illumination arrangement and the spatial light modulator; and a lens array, each lens of which for directing a respective wavelength band of the broadband illumination beam subsequent to being dispersed onto a respective region of the spatial light modulator.

The disclosure relates to augmented reality devices, namely to near-field displays, to planar waveguides with diffractive optical elements and displays based on such planar waveguides. The architecture of diffractive optical elements, performed in a waveguide and a method for operating the architecture of diffractive optical elements, eliminating image dispersion and expanding the horizontal field of view are provided. The method for operating the architecture of diffractive optical elements, expanding the vertical field of view and a device for displaying an augmented reality containing the proposed architecture of diffractive optical elements are provided. The augmented reality glasses includes the proposed augmented reality display device.

A wavelength beam combining system includes: at least one laser diode bar that includes a plurality of emitters arranged in a row from a first end side to a second end side, and a heating element placed on the second end side with respect to the plurality of emitters; an optical element that condenses beams emitted from the plurality of emitters; a diffraction grating; an external resonance mirror; and a controlling apparatus that controls power supplied to the plurality of emitters and the heating element. The laser diode bar is placed so that a locked wavelength for an emitter located on the second end side is longer than the locked wavelength for an emitter located on the first end side. The controlling apparatus controls the power supplied to the heating element so that the heating element has a higher temperature than the plurality of emitters.

An optical combiner includes a first layer with a periodic arrangement of structures of a material with a first refractive index. A second layer overlies the structures on the first layer, and the second layer includes a material with a second refractive index. A difference between the first refractive index and the second refractive index, measured at 587.5 nm, is less than 1.5. The periodic arrangement of structures is configured such that the optical combiner produces, for an input signal incident on the first layer from air at an oblique elevation angle of greater than 20°, an output signal with three reflection peaks, each reflection peak having an average reflection of greater than 50% within a ±3° range of the elevation angle.

An optical combiner includes a first layer with a periodic two-dimensional arrangement of structures arranged to support resonance for an input signal of a target wavelength, wherein the structures have a first refractive index. A second layer overlies the structures on the first layer, wherein the second layer includes a second material with a second refractive index, and wherein a difference between the first refractive index and the second refractive index, measured at 587.5 nm, is less than about 1.5. The periodic arrangement of structures is configured such that the optical combiner produces, for the input signal incident on the first layer from air at an oblique elevation angle of greater than about 20°, an output signal with a reflection peak with an average reflection of greater than about 50% within a ± 5° range of the elevation angle.