Abstract: Systems and methods for tracking the position of a head-mounted display (HMD) system component. The HMD component may carry a plurality of angle sensitive detectors that are able to detect the angle of light emitted from a light source. The HMD component may include one or more scatter detectors that detect whether light has been scattered or reflected, so such light can be ignored. Control circuitry causes light sources to emit light according a specified pattern, and receives sensor data from the plurality of angle sensitive detectors. The processor may process the sensor data and scatter detector data, for example using machine learning or other techniques, to track a position of the HMD component. An angle sensitive detector may include a spatially-varying polarizer having a position-varying polarizing pattern and one or more polarizer layers that together are operative to detect the angle of impinging light.

Abstract: A head-mounted display device includes a display panel (such as a liquid crystal display), an optics system for focusing a portion of the display onto an eye of a user, and a backlight assembly including a light guide, a plurality of extraction features positioned on a surface of the light guide, and at least one laser diode for directing light into the light guide. The light guide is sized and dimensioned to illuminate only a portion of the display that is focused by the optics system; with the plurality of light extraction features configured to diffuse light toward the display panel for back illuminating the display panel.

Abstract: The present disclosure related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays). Display systems of the present disclosure may include a polarization compensation optic, such as a spatially varying polarizer, that provides phase retardation that varies as a function of position, which provides polarization compensation to provide light that is well suited for a polarization sensitive optic of the display system, such as a waveguide-based optical system, a pancake optical system, a birdbath optical system, a coating-based optical system, etc. The display systems of the present disclosure may be components of head-mounted display systems, or other types of display systems.

Abstract: An assembly for delivering an implantable medical device, the assembly includes an implantable medical device including an attachment feature and a delivery device that is adapted to releasably secure the implantable medical device, the delivery device including an attachment element adapted to create an interference fit with the attachment feature of the implantable medical device. The delivery device is adapted to enable a user to selectively disengage the interference fit between the attachment element of the delivery device and the attachment feature of the implantable medical device with a short linear motion when the delivery device is positioned proximate a delivery site for the implantable medical device.

Abstract: An optical system is provided that includes a correction portion including one or more spatially varying polarizers. A first spatially varying polarizer of the one or more spatially varying polarizers has a first control input configured to receive a first control signal indicating whether the first spatially varying polarizer is to be active or inactive. When active, the first spatially varying polarizer is operative to provide a first optical correction on light passing through the correction portion. The optical system includes a controller configured to determine whether to implement the first optical correction on the light passing through the correction portion and in response to determining to implement the first optical correction on the light passing through the correction portion, output the first control signal indicating the first spatially varying polarizer is to be active. Additional spatially varying polarizers may be controlled to provide additional or alternative optical corrections.

Abstract: Systems and methods for providing an optical lens for a head mounted display (HMD) or other application that is cost-effective and has high performance. A lens assembly may include a first, relatively thin lens and a second, relatively thick lens. The first lens may include microfeatures on at least one optical transmission surface thereof. The second lens may include at least one curved surface, such that the second lens is plano-convex, bi-convex, etc. Each of the first lens and the second lens may include mounting areas disposed about a periphery of the respective optical transmission areas of the lenses that include complementary mounting microfeatures thereon that enable the first and second lens to be coupled together and, when so coupled, to be self-aligned with each other within a very low tolerance. The mounting microfeatures may be provided on the lenses using a high precision process (e.g.

Abstract: The present disclosure is related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays) of an HMD system or other device. Display systems of the present disclosure may utilize polarization multiplexing that allow for improved optimization of diffraction optics. In at least some implementations, a display system may selectively polarize light dependent on wavelength (e.g., color) or field of view. An optical combiner may include polarization sensitive diffractive optical elements that are each optimized for a subset of colors or portions of an overall field of view, thereby providing improved correction optics for a display system.

Abstract: Improved illumination optics for various applications. The illumination optics may include an optical beam spreading structure that provides a large spread angle for an incident collimated beam or provides finer detail or resolution compared to convention diffractive optical elements. The optical beam spreading structure may include first and second spatially varying polarizers that are optically aligned with each other. The first and second spatially varying polarizers may be formed of a liquid crystal material, such as a multi-twist retarder (MTR). The first and second spatially varying polarizers may diffract light of orthogonal polarization states, which allows for different diffraction patterns to be used in a single optical structure. The two patterns may provide a combined field of view that is larger than either of the first and second fields of view or may provide finer detail or resolution than the first or second fields of view can provide alone.

Abstract: An implantable medical device includes an expandable frame that is moveable between a collapsed configuration for delivery and an expanded configuration for deployment. One or more proximally-facing fixation burrs are secured relative to the expandable frame. One or more distally-facing fixation burrs are secured relative to the expandable frame. The one or more proximally-facing fixation burrs and the one or more distally-facing fixation burrs together provide the implantable medical device with bi-directional stability.

Abstract: An optical system of a head-mounted display (HMD) system that includes a diffractive optical element coupled to a display, for example, via lamination or a suitable optically clear adhesive. The optical system may include a reflective polarizer and a quarter-wave plate that, together with the diffractive optical element, form a catadioptric or “pancake” configuration that focuses light from a display system to an eye of a user of the head mounted display system.

Abstract: Systems and methods for tracking the position of a head-mounted display (HMD) system component. The HMD component may carry a plurality of angle sensitive detectors that are able to detect the angle of light emitted from a light source. The HMD component may include one or more scatter detectors that detect whether light has been scattered or reflected, so such light can be ignored. Control circuitry causes light sources to emit light according a specified pattern, and receives sensor data from the plurality of angle sensitive detectors. The processor may process the sensor data and scatter detector data, for example using machine learning or other techniques, to track a position of the HMD component. An angle sensitive detector may include a spatially-varying polarizer having a position-varying polarizing pattern and one or more polarizer layers that together are operative to detect the angle of impinging light.

Abstract: A medical implant including an expandable framework configured to shift between a collapsed configuration and an expanded configuration, the expandable framework comprising a plurality of interconnected struts defining a plurality of cells; and an occlusive element connected to the expandable framework and having an inner surface and an outer surface. The expandable framework may include a plurality of securement members projecting from the plurality of interconnected struts. One of the inner surface or the outer surface of the occlusive element may be in contact with the plurality of interconnected struts, and the other of the inner surface and the outer surface not in contact with the plurality of interconnected struts may lie against an opposing surface of each of the plurality of securement members. A tip portion of the plurality of securement members may not extend radially outward of the plurality of interconnected struts.

Abstract: An optical system is provided that includes a correction portion including one or more spatially varying polarizers. A first spatially varying polarizer of the one or more spatially varying polarizers has a first control input configured to receive a first control signal indicating whether the first spatially varying polarizer is to be active or inactive. When active, the first spatially varying polarizer is operative to provide a first optical correction on light passing through the correction portion. The optical system includes a controller configured to determine whether to implement the first optical correction on the light passing through the correction portion and in response to determining to implement the first optical correction on the light passing through the correction portion, output the first control signal indicating the first spatially varying polarizer is to be active. Additional spatially varying polarizers may be controlled to provide additional or alternative optical corrections.

Abstract: The present disclosure related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays). Display systems of the present disclosure may include a polarization compensation optic, such as a spatially varying polarizer, that provides phase retardation that varies as a function of position, which provides polarization compensation to provide light that is well suited for a polarization sensitive optic of the display system, such as a waveguide-based optical system, a pancake optical system, a birdbath optical system, a coating-based optical system, etc. The display systems of the present disclosure may be components of head-mounted display systems, or other types of display systems.

Abstract: Disclosed is a system for generating EUV radiation in which current flowing through target material in the orifice 320 of a nozzle in a droplet generator is controlled by providing alternate lower impedance paths for the current and/or by limiting a high frequency component of a drive signal applied to the droplet generator.

Abstract: An example occlusive implant is disclosed. The example occlusive implant includes an expandable framework configured to shift between a first configuration and a second expanded configuration, an occlusive member disposed along at least a portion of an outer surface of the expandable framework and a resilient member coupled to the occlusive member. Further, the resilient member is configured to keep the occlusive member taut against an outer surface of the expandable member in both the first configuration and the second configuration.

Abstract: Systems and methods for providing a display for an electronic device that includes a liquid crystal display panel assembly, a backlight assembly that includes a light source, and a spatially varying polarizer that provides phase retardation that varies as a function of propagation length away from the light source. The display may also include a linear polarizer and other optical components that improve the efficiency of the backlight assembly, thereby reducing power consumption, cost, space requirements, and provide other advantages.

Abstract: An occlusion device for implantation in a left atrial appendage includes a proximal hub defining a recess configured to releasably connect with a delivery shaft, a frame connected to the proximal hub, a membrane coupled to and covering at least the proximal portion of the frame, the membrane comprising a material configured to block a passage of blood clots therethrough, and a plug configured to be received in the recess and remain in the recess after implantation.

Abstract: An occlusive implant may include an expandable framework configured to shift between a collapsed configuration and an expanded configuration. The expandable framework includes a plurality of anchor members extending radially outward from the expandable framework in the expanded configuration, each anchor member including at least one base portion fixedly secured to the expandable framework and a plurality of anchor tips extending from each base portion. Each base portion extends longitudinally along the expandable framework. A method of making the occlusive implant may include forming the expandable framework, forming the plurality of anchor members, and fixedly attaching each base portion to the expandable framework such that each anchor member extends radially outward from the expandable framework in the expanded configuration and each base portion extends longitudinally along the expandable framework.

Abstract: An implant includes a frame comprising a tubular body formed by a plurality of interconnected struts that are manufactured to reduce stresses and strains resulting from component interaction during chronic use. At least a portion of a longitudinal corner of one or more struts of the frame may be chamfered, rounded, or otherwise modified to distribute stresses experienced at the strut corner throughout the strut body. Chamfering and/or rounding corners along at least a portion of a strut of the frame may reduce stresses on the frame caused by interactions between the frame and other components of the implant. The implant may be manufactured by cutting (e.g., laser cutting) a plurality of struts from a tubular metal alloy, polymer, or the like forming the tubular body, and softening at least a portion of an edge of the strut by cutting, grinding, and/or micro-blasting the edges of the corner.