Abstract: A system for making a holographic medium for use in generating light patterns for eye tracking includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium, a second set of optical elements configured to transmit the second portion of the light for providing a second wide-field beam, and a plurality of parabolic reflectors optically coupled with the second set of optical elements and configured to receive the second wide-field beam and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.

Abstract: In one embodiment, a system may determine a sampling location within a texture with each texel encoding first and second distance fields and first and second color indices. The system may select, based on the sampling location, a set of texels to use to determine a color for the sampling location. The system may compute first and second interpolated distance fields based on, respectively, the first and second distance fields of the set of texels. The system may select, based on the first interpolated distance field, a subset of the set of texels, and select a texel from the subset of texels based on a distance between the texel and the sampling location. The system may select, based on the second interpolated distance filed, a color index from the first and second color indices of the selected texel and use it to determine the color for the sampling location.

Abstract: In one embodiment, a method for determining a dynamic head-related transfer function for a subject includes receiving audio recordings of a sound captured by audio sensors. The sound is emitted by an in-ear speaker worn by the subject. Additionally, a reference signal captured by a microphone coupled to the in-ear speaker and one or more images captured by image sensors are received. The one or more images depict a body pose of the subject while the sound is emitted by the in-ear speaker and may be used to generate a pose representation of the body pose of the subject. A head-related transfer function for each audio sensor is determined based on the pose representation, the audio recordings of the sound, and the reference signal. The dynamic head-related transfer function is determined based on the head-related transfer function for each audio sensor.

Abstract: A LED device is provided. In one example, the LED device comprises: an electrical contact; and an epitaxial structure having a mesa shape and including: a first doped semiconductor layer; a second doped semiconductor layer; and a quantum well layer between the first doped semiconductor layer and the second doped semiconductor layer. The electrical contact is formed on the first doped semiconductor layer. The first doped semiconductor layer comprises a protrusion region between the electrical contact and the quantum well layer. The protrusion region facilitates movement of charges from the electrical contact to a limited region of the quantum well layer.

Abstract: Aspects of the present disclosure are for an interaction mode system that provides multiple interaction modes in an artificial reality environment with automatic, context-specific transitions between interaction modes. An interaction mode can specify how the interaction mode system determines direction indications and movement within an artificial reality environment and interactions for making selections or performing other actions. In some implementations, the interaction mode system can control at least four interaction modes including a no-hands, 3DoF mode, a no-hands, 6DoF mode, a gaze and gesture mode, and a ray casting mode. The interaction mode system can employ a mapping of interaction mode context factors (e.g., which components are enabled, mode settings, lighting or other environment conditions, current body positions, etc.) to interaction modes to control transitioning between particular interaction modes.

Abstract: Elements in an artificial reality environment (e.g., objects or volumes) can be assigned different ray casting rules. In response to detecting a corresponding trigger, such as the user entering the volume or interacting with the object, the ray casting rules associated with that element can be implemented. Implementing the ray casting rules can control aspects of the ray such as the ray's shape, size, effects of the ray, where a ray originates, whether the ray is directed along a particular plane, or how rays are controlled. In some cases, an artificial reality system can cast multiple rays at the same time, which are controlled by the same feature of a user. Using priority rules (e.g., weighting factors, hierarchies, filters, etc.), the artificial reality system can determine which ray is primary, allowing the user to use the primary ray to interact with elements.

Abstract: A light emitting diode (LED) chip is bonded to a substrate. The LED chip includes a plurality of electrodes that each corresponds to a contact on the substrate. The plurality of electrodes are exposed to one or more laser beams for coupling the LED chip to the substrate. The laser beams may be directed to one or more edges or corners of the plurality of electrodes, where the edges or corners lie outside emission areas of LEDs on the LED chip.

Abstract: An optical system includes an optical waveguide, and a first optical element configured to direct a first ray, having a first circular polarization and impinging on the first optical element at a first incidence angle, in a first direction so that the first ray propagates through the optical waveguide via total internal reflection toward a second optical element. The first optical element is configured to also direct a second ray, having a second circular polarization that is distinct from the first circular polarization and impinging on the first optical element at the first incidence angle, in a second direction that is distinct from the first direction so that the second ray propagates away from the second optical element. The second optical element is configured to direct the first ray propagating through the optical waveguide toward a detector.

Abstract: The disclosure describes artificial reality (AR) systems and techniques that enable hierarchical power management of multiple devices within a multi-device AR system. For example, a multi-device AR system includes a device comprising one of a peripheral device configured to generate artificial reality content for display or a head-mounted display unit (HMD) configured to output artificial reality content. The device comprises a System on a Chip (SoC) that includes a host subsystem and plurality of subsystems. Each subsystem includes a child energy processing unit configured to manage power states for the subsystem. The host subsystem includes a parent energy processing unit configured to direct power management of each of the child energy processing units of the plurality of subsystems.

Abstract: The disclosed computer-implemented method may include tracking (1) a position of a primary real-world object within a real-world environment via a primary tracking method, and (2) a position of a secondary real-world object within the real-world environment via a secondary tracking method. The method may further include presenting (1) a primary virtual object at a position within an artificial environment corresponding to the tracked position of the primary real-world object, and (2) a secondary virtual object at a position within the artificial environment corresponding to the tracked position of the secondary real-world object. The method may further include (1) detecting an interaction of the primary real-world object with the secondary real-world object, and (2) transitioning to tracking the position of the primary real-world object via the secondary tracking method. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: In one example, an apparatus comprises a backplane to attach an array of light emitting diodes (LED), the backplane comprising an array of display driver circuits, each display driver circuit of the array of display driver circuits corresponding to an LED of the array of LEDs and comprising: a current driver circuit configured to supply to a current to the corresponding LED; a control signal generator circuit configured to supply a driver control signal to the current driver circuit to control the current; and one or more monitor circuits controllable to provide access to at least one of: the current, or an internal voltage of at least one of the current driver circuit or the control signal generator circuit.

Abstract: An electronic device tracks, for a user performing a target acquisition movement within a 3D space, movement parameters of a plurality of input devices of the user. The electronic device predicts, for the user, a region of interest within the 3D space, using a regression model, based on the movement parameters. The region of interest includes a plurality of targets in close proximity. The electronic device predicts an endpoint of the target acquisition movement, within the region of interest, using a pointer facilitation technique. In some embodiments, the plurality of input devices includes an eye tracking input device, each input device corresponds to a predefined input device type, and the movement parameters include gaze data from the eye tracking input device. In some embodiments, input devices includes an eye tracking input device, a head-mounted display, and a hand-held controller, and the user's eye, hand, and head movements are coordinated.

Abstract: In one embodiment, a method includes detecting a user input comprising an incomplete gesture performed by one or more hands of a first user by a client system associated with the first user; selecting one or more candidate gestures from a plurality of pre-defined gestures by the client system based on a personalized gesture-recognition model, wherein each of the candidate gestures is associated with a confidence score representing a likelihood the first user intended to input the respective candidate gesture, and presenting one or more suggested inputs corresponding to one or more of the candidate gestures at the client system.

Abstract: Various embodiments set forth liquid crystal (LC) patterning control systems in which LCs are aligned using locally applied magnetic fields. The index of refraction experienced by light propagating through an anisotropic LC is dependent on orientation. As a result, a phase difference may be imparted to an optical beam that is passed through, or reflected from, an array of LCs whose orientations are controlled via locally applied magnetic fields. In some embodiments, the locally applied magnetic fields may be generated by driving currents through wires that intersect at micro or nanomagnetic particles or at magnetic domains, or by applying voltages to micro or nanocoils wrapped around high-permeability cores, among other things.

Abstract: An image is rendered to a display of a head mounted display. A swift-eye movement is identified. A compensatory image is rendered to a secondary display in response to identifying the swift-eye movement.

Abstract: A sensor system includes an actuator, an accelerometer coupled with the actuator, a rigid member, a transducer, and one or more processors. The actuator generates motion. The accelerometer outputs an acceleration signal responsive to at least the motion of the actuator. The rigid member extends from a first end coupled with the accelerometer to a second end. The transducer is coupled with the second end of the rigid member. The transducer can be configured to couple with a load, and can output a force signal responsive to at least a portion of the motion of the actuator transmitted to the transducer via the rigid member. The one or more processors determine a mechanical impedance of the load based at least on the acceleration signal and the force signal.

Abstract: Disclosed herein are related to a system and a method of coordinating among artificial reality links. In one approach, a system comprising a first console for executing an application for artificial reality may include a wireless communication interface and a processor. The processor may be configured to send, via the wireless communication interface, a first message comprising a first plurality of parameters and a first schedule for access to a shared wireless channel by the first console, receive, from a second console via the wireless communication interface, a second message comprising a second plurality of parameters and a second schedule for access to the shared wireless channel by the second console, update, responsive to the second message, the first plurality of parameters and the first schedule, and/or send, via the wireless communication interface, a third message comprising the updated first plurality of parameters and the updated first schedule.

Abstract: A manufacturing system for fabricating self-aligned grating elements with a variable refractive index includes a patterning system, a deposition system, and an etching system. The manufacturing system performs a lithographic patterning of one or more photoresists to create a stack over a substrate. The manufacturing system performs a conformal deposition of a protective coating on the stack. The manufacturing system performs a deposition of a first photoresist of a first refractive index on the protective coating. The manufacturing system performs a removal of the first photoresist to achieve a threshold value of first thickness. The manufacturing system performs a deposition of a second photoresist of a second refractive index on the first photoresist. The second refractive index is greater than the first refractive index. The manufacturing system performs a removal of the second photoresist to achieve a threshold value of second thickness to form a portion of an optical grating.

Abstract: This disclosure describes hardware-based mutexes that employ software process authentication to prevent a software process from releasing the lock of a mutex locked by another software process. For example, systems are described in which a mutex controller receives a request from a process to lock a mutex. The mutex controller locks the mutex, writing a process key and process identifier to one or more hardware registers associated with the mutex. If the mutex controller receives a request to release the lock on the mutex, the mutex controller determines if the key received with the request matches the process key written in the one or more hardware registers of the mutex and, if so, releases the lock on the mutex.