Abstract: Disclosed herein are devices and methods related to an interface between a host processor and a wireless processor of a first device for maintaining an artificial reality session with a second device. In one aspect, the host processor is configured to provide data of the artificial reality session to the wireless processor, and the wireless processor is configured to transmit the data to the second device through a wireless medium. In one aspect, the host processor is configured to provide an indicator indicating an end of transmission of the data, to the wireless processor, to cause the wireless processor to transmit the indicator to the second device through the wireless medium, and to cause the host processor and the wireless processor to enter a sleep state in response to transmission of the indicator. The indicator may cause the second device to enter the sleep state.

Abstract: In one embodiment, a method includes accessing a plurality of points, wherein each point (1) corresponds to a spatial location associated with an observed feature of a physical environment and (2) is associated with a patch representing the observed feature, determining a density associated with each of the plurality of points based on the spatial locations of the plurality of points, scaling the patch associated with each of the plurality of points based on the density associated with the point, and reconstructing a scene of the physical environment based on at least the scaled patches.

Abstract: This disclosure describes an artificial reality system that presents artificial reality content or artificial reality effects based on, or in response to, interactions with one or more physical objects within a physical environment. In one example, this disclosure describes a method that includes determining that a user has performed a trigger action on a trigger object; responsive to determining that the user has performed the trigger action, generating artificial reality content; presenting the artificial reality content on a display associated with a head-mounted display; determining that the user has performed a de-trigger action; and responsive to determining that the user has performed the de-trigger action, discontinuing presentation of the artificial reality content.

Abstract: Described herein are accelerometers, apparatus and systems incorporating accelerometers, and techniques for controlling sensing operations in an accelerometer. In certain embodiments, an accelerometer is a microelectromechanical systems (MEMS) device including a proof mass, an anchor, a spring between the proof mass and the anchor, a drive electrode, and a sense beam. The anchor is located in an opening defined by a body of the proof mass. The spring and the proof mass form a spring system suspended from the anchor. The sense beam is configured to oscillate at a particular resonance frequency that changes according to a force generated by movement of the proof mass in response to acceleration. In some embodiments, a support structure couples the anchor to the spring and operates as a stress decoupling area that prevents or limits propagation of stress from the anchor to the sense beam and the spring system.

Abstract: In one embodiment, a computing system may generate and display a virtual reality environment to a user. The computing system may determine a head pose of the user based on headset tracking data associated with a headset worn by the user. The computing system may determine a hand pose of the user based on hand tracking data associated with a device held or worn by a hand of the user. The computing system may access scene information associated with the displayed virtual reality environment. The computing system may determine a predicted focal point of the user within the virtual reality environment by processing the head pose, the hand pose, and the scene information using a machine-learning model.

Abstract: A method of forming a nanovoided composite polymer includes forming a resin-containing layer over a substrate, the resin-containing layer including a polymer-forming phase and a sacrificial phase, curing the polymer-forming phase to form a polymer matrix containing the sacrificial phase, and removing the sacrificial phase selectively with respect to the polymer matrix to form a nanovoided composite polymer including the polymer matrix and nanovoids dispersed throughout the polymer matrix. The nanovoids may be randomly or regularly dispersed throughout the matrix. Various other methods, systems, apparatuses, and materials are also disclosed.

Abstract: In one embodiment, a method includes receiving a user input from a user from a client system associated with the user, wherein the client system comprises one or more cameras, determining one or more points of interest in a field of view of the one or more cameras based on one or more machine-learning models and sensory data captured by the one or more cameras, generating a plurality of media files based on the one or more points of interest, wherein each media file is a recording of at least one of the one or more points of interest, generating one or more highlight files based on the plurality of media files, wherein each highlight file comprises a media file that satisfies a predefined quality standard, and sending instructions for presenting the one or more highlight files to the client system.

Abstract: Techniques disclosed herein relate to eye illumination for eye tracking in a near-eye display system. One example of an eye illumination system includes a substrate transparent to visible light and infrared light and configured to be placed in front of an eye of a user, and a shortwave-pass filter on a first surface of the substrate. The shortwave-pass filter includes regions configured to transmit visible light and reflect infrared light in ambient light, and a plurality of windows configured to transmit both visible light and infrared light in the ambient light.

Abstract: In one embodiment, a computing system may access an image to be displayed by a display. The system may determine one or more characteristics associated with a content of the image. The one or more characteristics may include a spatial frequency of the content in a spatial frequency domain. The system may determine a display persistence time period for the display to display the image based on the one or more characteristics associated with the content of the image. The system may configure the display to display the image using the display persistence time period.

Abstract: The disclosure is generally directed to a system for reducing wind noise. A system includes one or more processors coupled to a non-transitory computer-readable storage medium having instructions encoded thereon that, when executed by the one or more processors, cause the one or more processors to obtain signals respectively generated from two or more microphones during a time period, the signals representing acoustic energy detected by the two or more microphones during the time period, determine a coherence between the signals, and determine a filter based on the coherence. The filter is configured to reduce wind noise in one or more of the signals.

Abstract: The disclosed computer-implemented method may include (1) establishing a directional wireless link between a first computing device and a second computing device in a first direction, (2) exchanging, over the directional wireless link in the first direction, first data between the first computing device and the second computing device, (3) determining, via a sensor of the first computing device, a change to a position or an orientation of the first computing device, (4) redirecting, based on the change, the directional wireless link to a second direction, and (5) exchanging, over the directional wireless link in the second direction, second data between the first computing device and the second computing device. Various other methods and systems are also disclosed.

Abstract: In one embodiment, a method includes, generating rays for casting into an artificial reality scene that includes one or more surfaces to determine whether the one or more surfaces are visible from a viewpoint. An origin and a trajectory of each ray are based on the viewpoint. The method includes applying a geometric transformation to the rays to modify their respective trajectory into the artificial reality scene. The geometric transformation is based on one or more distortion characteristics of a display system. The method includes determining, based on the modified trajectories of the rays, points of intersection of rays with the one or more surfaces in the artificial reality scene. The method includes providing, for display by the display system, color values generated based on the determined points of intersection.

Abstract: 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.

Abstract: Techniques for overcoating slanted structures and devices obtained using the techniques are disclosed. In some embodiments, a method of forming an overcoat layer on a surface-relief structure on a substrate includes receiving the substrate with the surface-relief structure. The surface-relief structure includes a plurality of ridges slanted with respect to the substrate, and a plurality of grooves each between two adjacent ridges. The method further includes depositing, in each cycle of a plurality of cycles, a uniform layer of an overcoat material on surfaces of the plurality of ridges and bottoms of the plurality of grooves. The deposited layers of the overcoat material and the plurality of ridges collectively form a light-coupling structure on the substrate. A surface of the overcoat layer is planar.

Abstract: A capacitive sensing assembly comprises a nonconductive interface material, a conductive plastic, an electrode, and a controller. The capacitive sensing assembly is configured to detect a proximity of skin to the nonconductive interface material. The nonconductive interface material comprises a first surface and a second surface that are opposite one another. The first surface receives contact with the skin. The conductive plastic is coupled to the second surface of the interface material. The electrode is electrically coupled to the conductive plastic and configured to provide an electrical signal. The electrical signal corresponds to a surface capacitance of the nonconductive interface material that is based in part on the conductive plastic, the nonconductive interface material, and the proximity of the skin to the interface material. The controller determines the proximity of the skin based on the electrical signal that corresponds to the surface capacitance.

Abstract: An optical system for a head mounted display (HMD) includes a display layer, an illumination layer, an optical combiner, and an active optics block. The display layer is configured to emit display light and the illumination layer includes an array of point light sources configured to emit calibration light. The optical combiner is configured to pass the display light to a front side of the optical system and to direct the calibration light to a camera. The active optics block includes an adjustable lens disposed between the illumination layer and the optical combiner, where the adjustable lens is configured to pass the calibration light to the optical combiner and to focus the display light for a user of the HMD. The active optics block is further configured to adjust an optical power of the adjustable lens based on a calibration image captured by the camera responsive to the calibration light.

Abstract: A device for illuminating a spatial light modulator includes a light source and an optical element. The light source is configured to provide illumination light. The optical element has a first surface, a second surface that is distinct from and non-parallel to the first surface, and a third surface that is distinct from and non-parallel to the first surface and the second surface. The optical element is configured to receive the illumination light at the first surface, propagate the illumination light via total internal reflection, and output the illumination light from the third surface. Also disclosed is a method performed by the device.

Abstract: Embodiments relate to a method for fabricating a light-emitting-diode (LED). A metal layer is deposited on a p-type semiconductor. The p-type semiconductor is on an n-type semiconductor. The metal layer is patterned to define a p-metal. The p-type semiconductor is etched using the p-metal as an etch mask. Similarly, the n-type semiconductor is etched using the p-metal and the p-type semiconductor as an etch mask to define individual LEDs.

Abstract: Aspects of the present disclosure are directed to creating and administering artificial reality collaborative working environments and providing interaction modes for them. An XR work system can provide and control such artificial reality collaborative working environments to enable, for example, A) links between real-world surfaces and XR surfaces; B) links between multiple real-world areas to XR areas with dedicated functionality; C) maintaining access, while inside the artificial reality working environment, to real-world work tools such as the user's computer screen and keyboard; D) various hand and controller modes for different interaction and collaboration modalities; E) use-based, multi-desk collaborative room configurations; and F) context-based auto population of users and content items into the artificial reality working environment.

Abstract: An artificial-reality headset assembly includes an artificial-reality headset, a battery pack, and a plurality of head straps. One end of each of the head straps is coupled to the artificial-reality headset and the respective opposite end is coupled to the battery pack. The plurality of head straps includes one or more side straps configured to be worn around a user's head. The battery pack is located in proximity to a posterior portion of the user's head when the artificial-reality headset is worn. The position and weight of the battery pack function to counterbalance weight of the artificial-reality headset, creating a symmetric balance along an axis of the user's head and maintaining the position of the battery pack regardless of adjustment to the one or more side straps. In some embodiments, the plurality of head straps includes an overhead strap (e.g., an adjustable ergonomic strap).