Techniques disclosed herein relate to micro light emitting diodes (micro-LEDs) for a display system. A display system includes an array of micro light emitting diodes (micro-LEDs), an array of output couplers optically coupled to the array of micro-LEDs and configured to extract light emitted by respective micro-LEDs in the array of micro-LEDs, a waveguide display, and display optics configured to couple the light emitted by the array of micro-LEDs and extracted by the array of output couplers into the waveguide display. Each output coupler in the array of output couplers is configured to direct a chief ray of the light emitted by a respective micro-LED in the array of micro-LEDs to a different respective direction.

An optical device comprising a first surface with a plurality of micro sized facets, each facet having a respective orientation. Said plurality of facets having an optical axis which extends parallel to the normal vector to an average orientation of all said respective orientations. The plurality of facets comprising at least a first and a second group of facets, each group is formed by a respective number of at least twenty-five compactly arranged neighboring facets. Each group is arranged to generate during operation a respective, mutually identical whole pattern. Each facet in a respective group is arranged to display a sub-pattern of said respective whole pattern. The whole patterns are mutually superpositioned.

Apparatus and methods for coupling an optical beam from an optical source to a hi-tech system are described. A compact, low-cost beam-shaping and steering assembly may be located between the optical source and hi-tech system and provide automated adjustments to beam parameters such as beam position, beam rotation, and beam incident angles. The beam-shaping and steering assembly may be used to couple an elongated beam to a plurality of optical waveguides.

A device for laser projection comprises a first laser diode configured to emit a first linearly polarized laser beam extending along a first polarization axis and a second laser diode configured to emit a second linearly polarized laser beam extending along a second polarization axis that is perpendicular to the first polarization axis. A polarization combiner is configured to combine the first and second linearly polarizing laser beams into a combined laser beam, wherein the combined laser beam comprises one of: (1) circular polarization; and (2) elliptical polarization. A measuring device is configured to measure an intensity of the combined laser beam. A control unit is configured to receive the measured intensity of the combined laser beam and is further configured to adjust an intensity of at least one of: (1) the first laser diode; and (2) the second laser diode.

A user-wearable fluorescence based visualization system comprising a multi-light lamp assembly that provides for the selected output of light using multiple light emitting sources, wherein the outputted light may be tailored to generate response wavelength by the interaction of the emitted light and a tissue illuminated by the emitted light, through the process of fluorescence, and a viewing system that allows a practitioner view the fluorescent light generated by the tissue, and distinguish between healthy and diseased tissues.

Various embodiments include a camera with folded optics and lens shifting capabilities. In some examples, a folded optics arrangement of the camera may include one or more lens elements and light path folding elements (e.g., prisms). Some embodiments include voice coil motor (VCM) actuator arrangements, carrier arrangements, and/or suspension arrangements to provide autofocus (AF) and/or optical image stabilization (OIS) movement. Furthermore, some embodiments include position sensor arrangements for position sensing with respect to AF and/or OIS movement.

An augmented-reality system is combined with a surveying system to make measurement and/or layout at a construction site more efficient. A reflector can be mounted to a wearable device having an augmented-reality system. A total station can be used to track a reflector, and truth can be transferred to the wearable device while an obstruction is between the total station and the reflector. Further, a target can be used to orient a local map of a wearable device to an environment based on a distance between the target and the wearable device.

An energy directing system may include one or more energy sources and a plurality of energy directing surfaces configured to direct incident energy along a plurality of energy propagation paths therefrom. The plurality of energy directing surfaces are arranged such that the energy propagation paths from each energy directing surface are each defined by a four-dimensional coordinate, the four-dimensional coordinate comprising two spatial coordinates corresponding to a location of the respective energy directing surface and two angular coordinates defining the angular direction of the respective propagation path. Energy attribute data may be used to determine instructions for operating the one or more energy sources and the energy directing surfaces.

Head-mounted virtual and augmented reality display systems include a light projector with one or more emissive micro-displays having a first resolution and a pixel pitch. The projector outputs light forming frames of virtual content having at least a portion associated with a second resolution greater than the first resolution. The projector outputs light forming a first subframe of the rendered frame at the first resolution, and parts of the projector are shifted using actuators, such that physical positions of light output for individual pixels occupy gaps between the old locations of light output for individual pixels. The projector then outputs light forming a second subframe of the rendered frame. The first and second subframes are outputted within the flicker fusion threshold. Advantageously, an emissive micro-display (e.g., micro-LED display) having a low resolution can form a frame having a higher resolution by using the same light emitters to function as multiple pixels of that frame.

Disclosed herein are techniques for eye tracking in near-eye display devices. In some embodiments, an illuminator for eye tracking is provided. The illuminator includes a light source configured to be positioned within a field of view of an eye of a user; a first reflector configured to shadow the light source from a field of view of a camera; and a second reflector configured to receive light from the light source that is reflected by the eye of the user, and to direct the light toward the camera.