Abstract: A system for authentication of a user includes a light source to transmit polarized light, a polarization sensor, and processing logic. The system may cause the light source to illuminate an eye of the user with the polarized light, cause the polarization sensor to take an image of the eye to collect polarization characteristics particular to the eye when illuminated with the polarized light, and compare the polarization characteristics with previously collected polarization characteristics to authenticate the user.

Abstract: While a compiler compiles source code to create an executable binary, code is added into the compiled source code that, when executed, identifies and stores in a metadata table base and bounds information associated with memory allocations. Additionally, additional code is added into the compiled source code that enables hardware to determine a safety of memory access requests during an implementation of the compiled source code by performing an out-of-bounds (OOB) check in hardware using the base and bounds information stored in the metadata table. This enables the identification and avoidance of unsafe memory operations during the implementation of the executable by a GPU.

Abstract: While a compiler compiles source code to create an executable binary, code is added into the compiled source code that, when executed, identifies and stores in a metadata table base and bounds information associated with memory allocations. Additionally, additional code is added into the compiled source code that enables hardware to determine a safety of memory access requests during an implementation of the compiled source code by performing an out-of-bounds (OOB) check in hardware using the base and bounds information stored in the metadata table. This enables the identification and avoidance of unsafe memory operations during the implementation of the executable by a GPU.

Abstract: A waveguide system in a lens assembly of a head mounted device may be used to support eye tracking operations. The waveguide system includes a waveguide, an input coupler, and an output coupler. The input coupler is disposed in the waveguide, and the input coupler is configured to in-couple light into the waveguide. The output coupler is disposed in the waveguide and is configured to out-couple the light from the waveguide. The output coupler includes at least one trapezoidal portion to condition the depth of field for the waveguide system. The output coupler may have two (dual) trapezoidal portions that are similar to the shape of a bowtie or hourglass to configure the depth of field of the waveguide system along a particular direction (e.g., the y-axis). The bowtie shape of the output coupler provides uniform in-coupling of light from the input coupler along a range of angles.

Abstract: A lens assembly for a head mounted device may be configured to in-couple light from an eyebox region using a number of waveguide systems coupled to a number of image sensors, for example, for one or both lens assemblies in the head mounted device. The waveguide systems may be positioned in the lens assembly. The waveguide systems may be configured to in-couple light from various portions of the eyebox region. The waveguide systems may be configured to couple the light from a center region of the lens assembly to a number of peripheral regions of the lens assembly. The image sensors may be optically coupled to the waveguide systems and may be configured to receive portions of the light from the waveguide systems.

Abstract: Image light is generated with a display light source. The image light is visible. An infrared light source emits infrared light. A scan directs the image light and the infrared light to an input coupler of a display waveguide and the display waveguide presents the image light to an eyebox region as a virtual image.

Abstract: Image light is generated with a display light source. The image light is visible. An infrared light source emits infrared light. A scan directs the image light and the infrared light to an input coupler of a display waveguide and the display waveguide presents the image light to an eyebox region as a virtual image.

Abstract: An audio system configured to authenticate a user. The system detects, via a microphone array, airborne acoustic waves corresponding to a vocalization of a user. The system also detects, via a vibration measurement assembly, vibration of tissue of the user caused by the vocalization. The system generates an authentication dataset using the detected airborne acoustic waves and the detected vibration of tissue. The system may authenticate the user based in part on the authentication dataset.

Abstract: Implicit Memory Tagging (IMT) mechanisms utilizing alias-free memory tags that enable hardware-assisted memory tagging without incurring storage overhead above those incurred by conventional tagging mechanisms, while providing enhanced data integrity and memory security. The IMT mechanisms enhance the utility of error correcting codes (ECCs) to test memory tags in addition to the traditional utility of ECCs for detecting and correcting data errors and enable a finer granularity of memory tagging than many conventional approaches.

Abstract: An apparatus, system, and method for an eye tracking system for a head-mounted device include a light source, an image sensor, and a frame tracking system. The light source and image sensor may be configured to determine absolute and relative eye orientations. The frame tracking system may be configured to determine the displacement of a head-mounted device frame relative to the face of the user. The frame tracking system may provide displacement data for the displacement of the head-mounted device frame to the eye tracking system to enable the eye tracking system to compensate for frame slippage, frame jostling, or other frame displacement (relative to the face of the user). The frame tracking system may include one or more position sensors disposed on the head-mounted device frame and logic configured to determine displacement data using information from the one or more position sensors.

Abstract: Disclosed are devices, methods, systems, media, and other implementations that include a method comprising accessing during execution of a process a memory element, determining whether data stored in the accessed memory element includes security data representative of locations that, if accessed, indicate a potential system violation condition, determining, in response to a determination that the accessed memory element includes the security data, whether execution of the process involves access of one or more memory locations in the accessed memory element containing the security data, and performing one or more remedial actions in response to a determination that the one or more memory locations in the memory element containing the security data are being accessed.

Abstract: An eye-tracking system may include a light source to emit infrared (IR) light. A waveguide may include an input coupler. A scanner may be to direct the infrared (IR) light to the input coupler, which may be configured to direct the infrared (IR) light to exit the waveguide toward an eyebox region for eye-tracking. The scanner may be to direct visible light to the input coupler. The input coupler may be to direct the visible light toward the eyebox region for display as a virtual image. A sensor may be to generate an imaging signal when infrared (IR) light impinges upon the sensor via the scanner and the input coupler.

Abstract: An eye-tracking system may include a light source to emit infrared (IR) light. A waveguide may include an input coupler. A scanner may be to direct the infrared (IR) light to the input coupler, which may be configured to direct the infrared (IR) light to exit the waveguide toward an eyebox region for eye-tracking. The scanner may be to direct visible light to the input coupler. The input coupler may be to direct the visible light toward the eyebox region for display as a virtual image. A sensor may be to generate an imaging signal when infrared (IR) light impinges upon the sensor via the scanner and the input coupler.

Abstract: An aspect of the present disclosure describes an apparatus for non-invasive blood pressure monitoring that includes a plurality of pressure sensors, a plurality of sensor interfaces coupling the plurality of pressure sensors to at least one blood flow line disposed exterior from a patient, a pump for artificially generating blood flow through the at least one blood flow line, and a processor configured to receive pressure sensor measurements from the plurality of pressure sensors and generate a patient blood pressure estimation from the combined pressure sensor measurements.

Abstract: Image light is generated with a display light source. The image light is visible. An infrared light source emits infrared light. A scan directs the image light and the infrared light to an input coupler of a display waveguide and the display waveguide presents the image light to an eyebox region as a virtual image.

Abstract: Disclosed are methods, systems, devices, media, circuits, and other implementations, including a method that includes generating for a code block of a process executing on a controller-based device one or more code block copies defined in a virtual address space of the controller-based device, with the code block of the process being stored in a particular segment of a physical address space of the controller-based device, and with the code block configured to separately map to each of the one or more of the code block copies in the virtual address space. The method further includes processing at least a portion of one of the one or more code block copies defined in the virtual address space when the corresponding code block of the process is to be processed.

Abstract: There is provided a photonic integrated circuit configured for low-coherence interferometry and in-field sensing. The photonic integrated circuit can include an opto-coupler that has a substrate substantially transparent to a specified wavelength of light and a waveguide configured to route a light beam having a center wavelength at the specified wavelength. The opto-coupler further includes a mirror disposed at an angle, and the mirror is disposed on an angled surface of the substrate, the angled surface being proximate to an output end of the waveguide. The opto-coupler further includes a beam forming element configured to collect light reflected from the mirror, and the waveguide and the mirror are integrated within the substrate.

Abstract: A near-eye imaging system includes a light source, a waveguide, a scanner, and a sensor. The light source is configured to emit light. The waveguide includes an output coupler. The scanner is configured to direct the light to the output coupler at varying scan angles. The waveguide confines the light to guide the light to the output coupler. The output coupler has negative optical power and is configured to direct the light to exit the waveguide as expanding illumination light toward an eyebox region. The sensor is configured to generate a tracking signal in response to returning light incident on the sensor via the scanner and via the output coupler.

Abstract: An eye-tracking method includes enabling at least one light source of an array of light sources to emit non-visible light to illuminate an eye. The method also includes obtaining at least one image of the eye while the at least one light source is enabled. A position of the eye may then be determined based on a position of the at least one light source within the array of light sources in response to determining that the at least one image indicates a bright pupil condition when the at least one light source was enabled.

Abstract: A near-eye imaging system includes a light source, a waveguide, a scanner, and a sensor. The light source is configured to emit light. The waveguide includes an output coupler. The scanner is configured to direct the light to the output coupler at varying scan angles. The waveguide confines the light to guide the light to the output coupler. The output coupler has negative optical power and is configured to direct the light to exit the waveguide as expanding illumination light toward an eyebox region. The sensor is configured to generate a tracking signal in response to returning light incident on the sensor via the scanner and via the output coupler.