Abstract: An integrated optical beam steering system includes a photonic crystal nanostructure having a plurality of nanoelements, an input surface to receive light from an imager, and a concave output surface which maintains a desired field of view with suitable coupling efficiency. Parameters of the nanoelements are configured to give rise to a photonic bandgap for a predetermined range of wavelengths. Waveguides are disposed in the nanostructure which comprise negative space formed by the absence of nanoelements and are employed to generate a propagating band within the photonic bandgap. The respective waveguides have inputs disposed on the input surfaces of the nanostructure where light propagates in a respective waveguide in total internal reflection. The respective waveguides further have outputs that have paths with curved portions located in the nanostructure and the outputs are configured normal to the concave output surface.

Abstract: Examples are disclosed that related to scanning image display systems. In one example, a scanning head-mounted display system includes a light source, a motion sensor, a scanning mirror system configured to scan light from the light source along at least one dimension to form an image, and a controller configured to control the scanning mirror system to scan the light to form the image, receive head motion data from the motion sensor, and adjust one or more of a scan rate and a phase offset between a first frame and a second frame of the image based upon the head motion data.

Abstract: Examples are disclosed herein that are related to eye tracking using scanned beam imaging and multiple photodetectors. One example provides an eye tracking system, comprising an infrared light source, scanning optics configured to scan light from the infrared light source across a region comprising a user's cornea, and a plurality of photodetectors, each photodetector being configured to detect infrared light reflected from the user's cornea at a corresponding angle.

Abstract: Examples are disclosed herein relating to an adjustable scanning system configured to adjust light from an illumination source on a per-pixel basis. One example provides an optical system including an array of light sources, a holographic light processing stage comprising, for each light source in the array, one or more holograms configured to receive light from the light source and diffract the light, the one or more holograms being selective for a property of the light that varies based upon the light source from which the light is received, and a scanning optical element configured to receive and scan the light from the holographic light processing stage.

Abstract: Examples are disclosed herein that are related to eye tracking using scanned beam imaging and multiple photodetectors. One example provides an eye tracking system, comprising an infrared light source, scanning optics configured to scan light from the infrared light source across a region comprising a user's cornea, and a plurality of photodetectors, each photodetector being configured to detect infrared light reflected from the user's cornea at a corresponding angle.

Abstract: A light engine comprises a liquid crystal on silicon (LCOS) panel that is operated in combination with illumination and imaging optics to project high-resolution virtual images into a waveguide-based exit pupil expander (EPE) that provides an expanded exit pupil in a near-eye display system. In an illustrative example, the illumination optics comprise a laser that produces illumination light that is reflected by a MEMS (micro-electromechanical system) scanner using raster scanning to post-scan optics including a microlens array (MLA) and one or more collimating or magnifying lenses before impinging on the LCOS panel. The LCOS panel operates in reflection in combination with imaging optics, including one or more of beam-steering mirror and beam splitter, to couple virtual image light from the LCOS panel into the EPE.

Abstract: Examples are disclosed that related to scanning image display systems. In one example, a scanning head-mounted display system includes a light source, a motion sensor, a scanning mirror system configured to scan light from the light source along at least one dimension to form an image, and a controller configured to control the scanning mirror system to scan the light to form the image, receive head motion data from the motion sensor, and adjust one or more of a scan rate and a phase offset between a first frame and a second frame of the image based upon the head motion data.

Abstract: Examples are disclosed that related to scanning image display systems. In one example, a scanning display system comprises a laser light source comprising two or more offset lasers, a scanning mirror system configured to scan light from the laser light source in a first direction at a higher frequency, and in a second direction at a lower frequency to form an image, and a controller configured to control the scanning mirror system to scan the laser light an interlaced pattern to form the image, and to adjust one or more of a scan rate in the second direction and a phase offset between a first frame and a second frame of the interlaced image.

Abstract: Examples are disclosed herein that relate to reducing reflectivity in a micro-LED array in a display device to avoid ghost images. One example provides a method comprising forming a structure comprising a plurality of light emitters arranged to form a scannable light-emitter array, and forming a material having a lower reflectivity than inactive regions located between the light emitters.

Abstract: Examples are disclosed herein relating to an adjustable scanning system configured to adjust light from an illumination source on a per-pixel basis. One example provides an optical system including an array of light sources, a holographic light processing stage comprising, for each light source in the array, one or more holograms configured to receive light from the light source and diffract the light, the one or more holograms being selective for a property of the light that varies based upon the light source from which the light is received, and a scanning optical element configured to receive and scan the light from the holographic light processing stage.

Abstract: An input-coupler of an optical waveguide includes one or more Bragg polarization gratings for coupling light corresponding to the image in two different directions into the optical waveguide. The input-coupler splits the FOV of the image coupled into the optical waveguide into first and second portions by diffracting a portion of the light corresponding to the image in a first direction toward a first intermediate component, and diffracting a portion of the light corresponding to the image in a second direction toward a second intermediate component. An output-coupler of the waveguide combines the light corresponding to the first and second portions of the FOV, and couples the light corresponding to the combined first and second portions of the FOV out of the optical waveguide so that the light corresponding to the image and the combined first and second portions of the FOV is output from the optical waveguide.