Abstract: A method is described for modifying the mechanical properties of NIL materials. The method includes applying an imprint mask to a nano-imprint lithography (NIL) material layer to create an imprinted NIL material layer, with the NIL material layer comprised of a NIL material. The method further includes detaching the imprinted NIL material layer from the imprint mask, with the modulus level of the NIL material below a flexibility threshold to cause a shape of the imprinted NIL material layer to remain unchanged after detachment. The modulus level of the NIL material of the imprinted NIL material layer is increased beyond a strength threshold to create a first imprint layer, with the imprint layer having a structure that remains unaffected by a subsequent process to form a second imprint layer matching a master mold pattern.

Abstract: In one embodiment, a computing system may receive a target color and a propagated error for a pixel location. The system may determine an error-modified target color for the pixel location based on the received target color and the propagated error. The system may identify, based on a location of the error-modified target color in a three-dimensional color space, a subset of pre-determined colors in the three-dimensional color space. The error-modified target color may correspond to a weighted combination of the subset of pre-determined colors. The system may determine a pixel color for the pixel location based on the subset of pre-determined colors and respective weights associated with the subset of pre-determined colors. The system may determine, based on the pixel color, driving signals for light-emitting elements associated with the pixel location. The system may output the driving signals to control the light-emitting elements associated with the pixel location.

Abstract: A computer-implemented method for optical element fabrication with optical scanner feedback includes initiating the optical scanner to obtain an optical measurement of an optical layer of a multi-layer film. A rotational orientation for an optical element that is to be cut from the multi-layer film is then determined based on the optical measurement. The method also includes initiating a cutting instrument to cut the optical element from the multi-layer film at the rotational orientation.

Abstract: A surface-relief grating includes a base surface-relief grating comprising a plurality of ridges that include a first material, and a second material on only a top surface or a single sidewall of each ridge of the plurality of ridges, where the second material is different from the first material. A method of fabricating the surface-relief grating includes etching or molding a base surface-relief grating that includes a plurality of ridges, depositing a material layer on the plurality of ridges, and selectively etching the material layer to increase a height or a slant angle of an edge of a ridge in the plurality of ridges to make the surface-relief grating that includes the base surface-relief grating.

Abstract: A system for presenting audio content to a user. The system comprises one or more microphones coupled to a frame of a headset. The one or more microphones capture sound from a local area. The system further comprises an audio controller integrated into the headset and communicatively coupled to an in-ear device worn by a user. The audio controller identifies one or more sound sources in the local area based on the captured sound. The audio controller further determines a target sound source of the one or more sound sources and determines one or more filters to apply to a sound signal associated with the target sound source in the captured sound. The audio controller further generates an augmented sound signal by applying the one or more filters to the sound signal and provides the augmented sound signal to the in-ear device for presentation to a user.

Abstract: Optical structures, such as antireflective structures or Bragg gratings, may include multiple layers of high-index and low-index materials. The low-index materials may be approximately a quarter-wavelength in thickness (e.g., with respect to a center wavelength of incident light) and may include a nanovoided material. The high-index material may have a thickness of a half-wavelength and may include an oxide. The nanovoided material may include about 10% to 90% nanovoids by volume and may have an average index of refraction of about 1.05 to about 1.2. The antireflective structures or Bragg gratings may include multiple layers that can be optimized for layer count, thicknesses, and refractive indices to provide a reflectance below a given threshold for incident light of a given angular range. Various other methods, systems, apparatuses, and materials are also disclosed.

Abstract: A method of fabricating an image generator for use in a display, the method comprising: fabricating a plurality of discrete ILED array chips comprising a plurality of ILED emitters configured to produce light having the same wavelength, and wherein each of the plurality of ILED array chips is configured to produce light having one of a plurality of wavelengths; positioning the plurality of discrete ILED array chips on a carrier substrate such that a plurality of ILED emitters from adjacent chips form a pixel of a display; and bonding a first surface of the plurality of ILED array chips to a driver backplane such that electrical contacts of the plurality of ILED array chips are in electrical communication with the driver backplane, wherein the driver backplane comprises electronics for driving the ILED array chips.

Abstract: In one embodiment, a computing system may receive a number of texels organized into a texel array including a number of sub-arrays. The system may determine a number of texel subsets with the texels in each subset having a same position within their respective sub-arrays. The system may store the texel subsets into a number of buffer blocks, respectively, with each buffer block storing one texel subset. The system may retrieve a sampling texel array from the buffer blocks for parallelly determining pixel values of a number of sampling points. Each texel of the sampling texel array may be retrieved from a different buffer block.

Abstract: A device such as a micro-OLED includes a display element having a display active area disposed over a silicon backplane and a display driver integrated circuit (DDIC) electrically coupled to the display element through at least one contact that extends through the silicon backplane. Through silicon via (TSV) technology may be used to form the contacts. A chip-on-flex architecture may be used to orient and attach the DDIC to the silicon backplane.

Abstract: In one embodiment, a method includes accessing a first distortion definition for a first color component and a second distortion definition for a second color component; generating, for a pixel, a first ray for the first color component of the pixel and a second ray for the second component of the pixel; defining trajectories for the first and second rays using the first and second distortion definitions, respectively; casting, from a viewpoint in a 3D space, the first and second rays into the 3D space using the defined trajectories; computing, for the first and second rays, a first intersection location and a second intersection location with one or more objects in the 3D space; and determining a color value for the pixel based on the first and second intersection locations.

Abstract: Disclosed herein are techniques for reducing the pitch between light-emitting diodes (LEDs) in an array of LEDs. According to an aspect of the invention, a device includes an array having a plurality of LEDs and a reflector that is in Ohmic contact with at least two adjacent LEDs of the plurality of LEDs. Each LED of the plurality of LEDs includes a p contact, and the reflector is physically separated from the p contact of each LED of the plurality of LEDs.

Abstract: In one embodiment, a computing system accesses a plurality of images captured by one or more cameras from a plurality of camera poses. The computing system generates, using the plurality of images, a plurality of semantic segmentations comprising semantic information of one or more objects captured in the plurality of images. The computing system accesses a three-dimensional (3D) model of the one or more objects. The computing system determines, using the plurality of camera poses, a corresponding plurality of virtual camera poses relative to the 3D model of the one or more objects. The computing system generates a semantic 3D model by projecting the semantic information of the plurality of semantic segmentations towards the 3D model using the plurality of virtual camera poses.

Abstract: An electroactive device may include (1) an electroactive polymer element having a first surface and a second surface opposing the first surface, (2) a primary electrode abutting the first surface, and (3) a secondary electrode abutting the second surface. The electroactive polymer element may be transformed from an initial state to a deformed state and may achieve substantially uniform strain by the application of an electrostatic field produced by a potential difference between the electrodes. Various other devices, systems, and methods are also disclosed.

Abstract: An astigmatism compensation optical assembly includes a first liquid crystal layer disposed between opposing substrates. The astigmatism compensation optical assembly also includes a first electrode pattern disposed on at least one substrate. The first electrode pattern includes a set of parallel conductors each having a length proportional to the longest dimension of the clear aperture of the liquid crystal lens, and the parallel conductors are configured to generate a voltage distribution within the liquid crystal layer that results in the liquid crystal layer exhibiting cylindrical focal power.

Abstract: Determination of a composite acoustic parameter value for a headset is presented herein. A directionally enhanced audio signal is generated based on audio signals from an acoustic sensor array and a spatial signal enhancement filter that is directed for enhancement of a sound source. A SNR improvement value is determined based on a SNR value of the directionally enhanced audio signal and a SNR value of an audio signal from an acoustic sensor of the acoustic sensor array. The SNR improvement value is input into a model that maps SNR improvement values to spatial acoustic parameters to determine a spatial acoustic parameter. A temporal acoustic parameter is determined based on the audio signals. The composite acoustic parameter value is determined based on the spatial acoustic parameter and a temporal acoustic parameter value. Audio content presented to a user is adjusted based in part on the composite acoustic parameter value.

Abstract: The disclosed computer-implemented method may include receiving an indication of a reference elevation representing a plane of a real-world environment and establishing, with respect to the reference elevation, a virtual boundary for a virtual-world environment. The method may include receiving a request from a user to modify the virtual boundary and in response to the request from the user, monitoring an orientation of a direction indicator to generate orientation data. The method may also include modifying the virtual boundary based on the reference elevation and the orientation data. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: An optical assembly includes a partial reflector that is optically coupled with a first polarization volume holographic element. The partial reflector is capable of receiving first light having a first circular polarization and transmitting a portion of the first light having a first circular polarization. The first polarization volume holographic element is configured to receive the first portion of the first light and reflect the first portion of the first light as second light having the first circular polarization. The partial reflector is capable of receiving the second light and reflecting a first portion of the second light as third light having a second circular polarization opposite to the first polarization. The first polarization volume holographic element is configured to receive the third light having the second circular polarization and transmit the third light having the second circular polarization.

Abstract: Disclosed herein are techniques for eye illumination for eye position tracking. An illumination system includes a light source configured to emit a light beam in a first wavelength range, a beam splitter configured to split the light beam emitted by the light source into a plurality of light beams, a substrate configured to be placed in front of an eye of a user, and a plurality of reflectors located within the substrate. Each of the plurality of reflectors is configured to intercept one or more light beams from the plurality of light beams, reflect light in the one or more light beams from the plurality of light beams to the eye of the user, and transmit light in a second wavelength range different from the first wavelength range to the eye of the user. The substrate is transparent to both light in the first wavelength range and light in the second wavelength range.

Abstract: An optical system includes a first optical element having at least a first optical surface and a second optical surface, the first optical surface is not parallel to the second optical surface. The optical system includes a plurality of optical elements positioned adjacent to the second optical surface of the first optical element. The respective optical element of the plurality of optical elements is configured to receive light transmitted through the first optical surface at a first angle with respect to the second optical surface and direct the light back toward the first optical surface at a second angle, that is distinct from the first angle, with respect to the second optical surface.

Abstract: A method and a system for reconstructing obstructed face portions are provided herein. The method may include the following steps: obtaining off-line 3D data, being 3D data of a head of a person not wearing a face-obstructing object, being an object which obstructs a portion of the face of the person; obtaining in real time, real-time 3D data, being 3D data of said head, wherein said person wears said face-obstructing object; applying a 3D transformation to at least a portion of the off-line 3D data, based on the real-time 3D data, to yield reconstructed real time 3D data, being real-time 3D data related to the obstructed face portions; and merging the reconstructed real time 3D data into the real-time 3D data. The system may implement the aforementioned steps over a computer processor.