Abstract: A structure includes a first transparent conductive layer, a second transparent conductive layer, and an insulation layer disposed between the first transparent conductive layer and the second transparent conductive layer. A light source having a first node and a second node may have its first node electrically coupled to the first transparent conductive layer and its second node electrically coupled to the second transparent conductive layer. A via running though one of the transparent conductive layers may facilitate electrical routing to the light source.

Abstract: A tunable polarizing beam splitter receives light, reflects a portion of the light that is linearly polarized in a first direction and transmits a second portion of the light that is linearly polarized in a second direction. The first and second polarization directions can be adjusted by controlling the fast axis of switchable liquid crystals (LCs) in the tunable polarizing beam splitter. The tunable polarizing beam splitter may include interlaced isotropic layers and LC birefringent layers, each LC birefringent layer including integrated switchable LCs. In another example, the tunable polarizing beam splitter includes switchable half wave plates (HWPs) with switchable LCs, and a static beam splitter including interlaced isotropic and birefringent layers.

Abstract: Disclosed herein are techniques for eye illumination for eye position tracking. An illuminator for eye illumination includes a light source, a substrate configured to be placed in front of an eye of a user, and at least one reflector located within the substrate. The light source is configured to emit light in a first wavelength range to illuminate the at least one reflector. The at least one reflector is configured to reflect the light in the first wavelength range to the eye of the user, and transmit light in a second wavelength range different from the first wavelength range. The substrate is transparent to both the light in the first wavelength range and the light in the second wavelength range.

Abstract: Eye-tracking systems of the present disclosure may include at least one light source configured to emit radiation toward a location intended for an eye of a user and at least one optical sensor comprising at least one sensing element configured to detect at least a portion of the radiation emitted by the at least one light source. The at least one sensing element may have a lateral width of at least about 5 ?m and a lateral length of at least about 5 ?m. The eye-tracking system may be configured to track the user's eye using data generated by at least the optical sensor. Various other methods, systems, and devices are also disclosed.

Abstract: An apparatus may include a proximal adjustable-focus lens. The apparatus may further include a distal adjustable-focus lens. The apparatus may additionally include an actuator coupled to both the proximal adjustable-focus lens and the distal adjustable-focus lens, such that mechanical action by the actuator simultaneously adjusts the proximal adjustable-focus lens and the distal adjustable-focus lens. Various other apparatuses, systems, and methods are also disclosed.

Abstract: Examples include a device including a nanovoided polymer element having a first surface and a second surface, a first plurality of electrodes disposed on the first surface, a second plurality of electrodes disposed on the second surface, and a control circuit configured to apply an electrical potential between one or more of the first plurality of electrodes and one or more of the second plurality of electrodes to induce a physical deformation of the nanovoided polymer element.

Abstract: An optical element includes a nanovoided polymer layer having a first refractive index in an unactuated state and a second refractive index different than the first refractive index in an actuated state. Compression or expansion of the nanovoided polymer layer, for instance, can be used to reversibly control the size and shape of the nanovoids within the polymer layer and hence tune its refractive index over a range of values, e.g., during operation of the optical element. Various other apparatuses, systems, materials, and methods are also disclosed.

Abstract: A head mounted display (HMD) includes an eye sensor, an optics block, and a display. The eye sensor includes a detector and a tunable lens. The tunable lens has a micro-lens state (e.g., acts as a micro-lens array) and a neutral state. In the micro-lens state the eye sensor acts as an accommodation sensor, and in the neutral state the eye sensor acts as an eye tracking sensor. The eye sensor can alternate functioning as an eye tracking or an accommodation sensor by adjusting the state of the tunable lens. In alternate embodiments, the accommodation sensor is separate from the eye tracker and a beam splitter is used to split the reflected light toward the two sensors.

Abstract: A near-eye optic includes a substrate having a clear aperture for propagating light. A plurality of inconspicuous electrical components is supported by the substrate in the clear aperture of the substrate. The inconspicuous electrical components may be disposed in an inconspicuous pattern and may be electrically coupled to a plurality of inconspicuous conductive traces, which may also be disposed in an inconspicuous pattern. The inconspicuous pattern may include e.g. an asymmetric pattern, an aperiodic pattern, a pseudo-random pattern, a meandering pattern, a periodic pattern modulated with pseudo-random perturbations, or a non-rectangular pattern modulated with pseudo-random perturbations.

Abstract: A plurality of light sources such as vertical-cavity surface-emitting lasers (VCSELs) are configured to emit non-visible light through emission apertures. Optics are formed over the emission apertures of the plurality of light sources. The optics may provide different tilt angles or divergence angles to the non-visible light emitted by the light sources in the plurality of light sources.

Abstract: A near-eye optical element includes one or more infrared light sources and an optical structure. The one or more infrared light sources emit infrared beams. The optical structure includes an optically transparent material disposed over the emission aperture(s) of the infrared light source(s). The optical structure includes one or more facets that diverge the infrared beams.

Abstract: A vertical-cavity surface-emitting laser for near-field illumination of an eye includes a semiconductor substrate, a first reflector, a mesa region, a first electrical contact, and a second electrical contact. The first reflector is disposed on a first side of the semiconductor substrate and the mesa region is disposed on the first reflector. The mesa region includes a second reflector and an active region, where the mesa region is configured to generate a diverging infrared beam. The first electrical contact is disposed on a second side of the semiconductor substrate, opposite the first side, for electrically coupling to the first reflector. The second electrical contact is also disposed on the second side of the semiconductor substrate for electrically coupling to the second reflector.

Abstract: A near-eye optic includes a substrate having a clear aperture for propagating light. An inconspicuous electrical circuit is supported by the substrate in the clear aperture of the substrate. The inconspicuous electrical circuit includes a plurality of inconspicuous conductive traces disposed in an inconspicuous pattern and electrically coupled to a plurality of inconspicuous electrical components. The inconspicuous pattern may include e.g. an asymmetric pattern, an aperiodic pattern, a pseudo-random pattern, a meandering pattern, a periodic pattern modulated with pseudo-random perturbations, or a non-rectangular pattern modulated with pseudo-random perturbations.

Abstract: At least one waveguide is configured to receive coherent illumination light and direct the coherent illumination light to an object as a first light projection and second light projection. At least one interference pattern is generated by interference between the first light projection and the second light projection. A camera captures interference images of a plurality of phase-shifted interference images and a depth from an object may be determined from the phase-shifted interference images.

Abstract: A backlight device includes a first surface and a second surface that is opposite to the first surface. The backlight device is configured to emit light in a first optical band through the second surface toward a display panel of a head-mounted display (HMD). The display panel is configured to convert the light from the backlight device to image light. The backlight device is transparent to light in a second optical band that is different than the first optical band. An eye tracking system illuminates an eyebox with light in the second optical band. A camera assembly positioned adjacent to the first surface of the backlight device. The camera assembly is configured to capture images of the eye in the second optical band through the backlight device, the display panel. The eye tracking system determines eye tracking information based at least in part on the captured images.

Abstract: A head-mounted device (HMD) contains a display, an optics block, a redirection structure, and an eye tracking system. The display is configured to emit image light and provide it to an eye of a user. The optics block is configured to direct the emitted light in order to allow it to reach the eye. The eye tracking system contains a camera, an illumination source, and a controller. The camera is configured to capture image data using infrared light reflected from the eye. The controller is configured to use this image data to determine eye tracking information. The illumination source is configured to illuminate the eye with infrared light for the purpose of taking eye tracking measurements. The redirection structure is configured to direct infrared light reflected from the eye to the eye tracking system. In multiple embodiments, redirection structures may comprise prism arrays, lenses, liquid crystal layers, or grating structures.

Abstract: An eyewear device has an optical element, a patterned optical filter, and a camera. The optical element receives light that includes light in a visible band and light in an infrared (IR) band. The patterned optical filter is disposed on the optical element and has a filtering portion and a plurality of non-filtering portions. The filtering portion is transmissive to light in the visible band and filtering of light in the IR band. The non-filtering portions are transmissive to light in the visible band and transmissive to light in the IR band. Some portion of the received light in the IR band passes through the non-filtering portions and illuminates a portion of an eye of a user with a pattern. The camera captures images of the portion of the eye that is illuminated with the pattern.

Abstract: At least one waveguide is configured to receive coherent illumination light and direct the coherent illumination light to an object as a first light projection and second light projection. At least one interference pattern is generated by interference between the first light projection and the second light projection. A camera captures interference images of a plurality of phase-shifted interference images and a depth from an object may be determined from the phase-shifted interference images.

Abstract: A head-mounted display (HMD) includes a display illuminated by one or more illumination sources. An illumination source is coupled to a partially transparent circuit board and is configured to emit light onto a compound mirror. The compound mirror is farther from an exit pupil of the HMD than the display and reflects light from the illumination source back towards the exit pupil of the HMD. Light reflected by the compound mirror is transmitted through the partially transparent circuit board onto the display, illuminating the display.

Abstract: 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.