Abstract: A security system can use video analytics and/or other input parameters to identify a theft event. Optionally, the security system can take remedial action in response. For example, the security system can use video analytics to determine that a person has reached into a shelf multiple times at a rate above a threshold, which can indicate that a thief is quickly removing items from the shelf. The security system can also use video analytics to determine that a person has reached into a shelf via a sweeping action, which can indicate that a thief is gathering and removing a large quantity of items from the shelf in one motion. In response, the security system can alert security personnel, cause a speaker to output an audible message in the target area, flag portions of the video relating to the theft event, activate or ready other sensors or systems, and/or the like.

Abstract: The present disclosure is directed to systems and methods for validating wind farm performance improvements so as to optimize wind farm performance. In one embodiment, the method includes operating, via a controller, the wind farm in a first operating mode. Another step includes collecting a first set of operating data, via a processor, during the first operating mode. A further step includes operating, via the controller, the wind farm in a second operating mode. The method also includes collecting a second set of operating data, via the processor, during the second operating mode. Next, the method includes normalizing the first and second sets of operating data based on wind speed distributions. As such, another step includes comparing, via the processor, the normalized first and second sets of operating data so as to validate one or more wind farm performance measurements.

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: A method includes obtaining a first optical assembly including a first optical element and a first flexible membrane. The first optical element has a first optical element surface and a second optical element surface that is opposite to the first optical element surface. The first flexible membrane has a first membrane surface and a second membrane surface that is opposite to the first membrane surface. The first optical element is a geometric phase optical element or a polarization volume hologram optical element. The second optical element surface of the first optical element is coupled with at least a first portion of the first membrane surface of the first flexible membrane. The method also includes coupling the first optical element with the first flexible membrane attached thereto to a target substrate. Also disclosed is an optical assembly comprising the first optical element and the first flexible membrane.

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: A Pancharatnam Berry Phase (PBP) liquid crystal structure for adjusting or focusing light of a plurality of color channels emitted by a display of a head-mounted display (HMD) comprises a plurality of PBP active elements. Each PBP active element of the structure is configured to act as a half waveplate for light of a corresponding color channel, such that light of the corresponding color channel is adjusted by a predetermined amount. In addition, each PBP active element acts as a one waveplate for light of the remaining color channels, such that light of the remaining color channels passes through the PBP active element substantially unaffected. As such, the PBP structure is able to adjust incident light of the plurality of color channels uniformly in an apochromatic fashion.

Abstract: A head-mounted display (HMD) that includes optical components that provide multiple focal distances for light emitted from an electronic display. The HMD includes a multifocal structure having a plurality of optical components positioned in series such that light from an electronic display is received and passes through the optical components at least once before being output from the multifocal structure. The plurality of optical components includes a pixel level polarizer positioned to receive light from the electronic display. The pixel level polarizer has a first configuration that causes the pixel level polarizer to linearly polarize light in a first direction and a second configuration that causes the pixel level polarizer to linearly polarize light in a second direction that is different than the first direction. The multifocal structure is configured to output image light different focal distances based in part on the configuration of the pixel level polarizer.

Abstract: The invention relates to a method of creation of three-dimensional alignment patterns that includes providing a layer of optically recordable and polarization sensitive material having a thickness that is greater than, or equal to, a predefined thickness, and concurrently illuminating the optically recordable medium with two coherent beam of same or different polarization with predetermined angle between the beams such that the said beams impinge from the same side or from the opposite sides upon the layer of the recordable material. The invention further relates to polarization volume holograms based on the said alignment patterns and polarization holographic element including a single layer or a stack of several layers of optically recordable materials containing single or multiple polarization volume holograms.

Abstract: Systems and methods for noninvasively determining the function capacity of the kidney are provided. In the methods, first contrast agent is injected into the vasculature of a subject. The contrast agent is to be bound with functioning glomeruli of the kidney of the subject. Then, the kidney is imaged with a magnetic resonance imaging (MRI) system to acquire MRI images of the kidney. In the images, signal magnitudes or phases of voxels of regions bound with the contrast agent are different from signal magnitudes or phases of voxels of regions not bound with the contrast agent. Afterwards, the function capacity of the kidney is determined using the MRI images. Lastly, a report of the function capacity of the kidney is generated.

Abstract: A winch control system having a solid state winch contactor and a boost power supply for a vehicle equipped with an electric winch and especially for off-road vehicles, is disclosed. This invention automatically provides three winch speeds: a “slow start” (“creep”) speed for “parking” the hook and for “sneaking” up on a load, a normal speed for normal winch operation and a fast speed for taking less time to unwind and rewind the winch rope when there is no load on the winch. Protection features for the winch contactor and/or the winch include, but are not limited to, electronic winch motor braking, current limiting, over temperature, undervoltage and reverse battery. Winch current limiting is adjustable from 100 amps to 300 amps, chosen for the purpose of accommodating various winch sizes.

Abstract: A method and apparatus for outputting data that represents the change in value of an options premium that would have resulted if the options traded in a direct linear volume relationship with its underlying security is provided. Input values utilized include a delta value, a gamma value, a value-weighted average price of an underlying stock, a reference price of the underlying stock, and an original order premium value.

Abstract: Methods for quantifying pupil swim are disclosed in order to compensate for the same. A target image, in one embodiment, is displayed on a display of a head mounted display (HMD). Images of the target image are captured from a plurality of positions relative to an optical axis of an optics block of the HMD at an exit pupil of the HMD. The target image includes features and differences between observed locations of the features and their expected locations absent the optics block are determined. From these differences, a wavefront of the optics block is reconstructed and distortion corrections for the optics block are generated using the wavefront. The distortion corrections, when applied to a virtual scene, add pre-distortion that is canceled by the optical imperfections of the optics block as light of the virtual scene with the pre-distortion passes through the optics block.

Abstract: A security system can use video analytics and/or other input parameters to identify a theft event. Optionally, the security system can take remedial action in response. For example, the security system can use video analytics to determine that a person has reached into a shelf multiple times at a rate above a threshold, which can indicate that a thief is quickly removing items from the shelf. The security system can also use video analytics to determine that a person has reached into a shelf via a sweeping action, which can indicate that a thief is gathering and removing a large quantity of items from the shelf in one motion. In response, the security system can alert security personnel, cause a speaker to output an audible message in the target area, flag portions of the video relating to the theft event, activate or ready other sensors or systems, and/or the like.

Abstract: A varifocal block includes, in optical series, a switchable half waveplate (SHWP) and a plurality of liquid crystal (LC) lenses. The SHWP outputs circularly polarized light, and a handedness of the circularly polarized light is controlled by the SHWP being in an active state or a non-active state. Each LC lens of the plurality of LC lenses has a plurality of optical states, the plurality of optical states including an additive state that adds optical power to the LC lens and a subtractive state that removes optical power from the LC lens. The plurality of optical states of each of the plurality of the LC lenses compounded in optical series provides a range of adjustment of optical power for the varifocal block.

Abstract: A varifocal block includes liquid crystal (LC) lens and a liquid lens structure in optical series. The LC lens has a plurality of optical states, including an additive state that adds optical power to the LC lens and a subtractive state that removes optical power from the LC lens. The liquid lens structure comprises a transparent substrate layer, a deformable membrane, and a volume of liquid enclosed between the transparent substrate layer and the deformable membrane. The deformable membrane has an adjustable range of optical power dependent on an adjustable curvature of the deformable membrane. The plurality of optical states of the LC lens and the adjustable range of optical power of the liquid lens structure together provide a continuous range of optical power for the varifocal block.

Abstract: A head-mounted display (HMD) divides an image into a high resolution (HR) inset portion at a first resolution, a peripheral portion, and a transitional portion. The peripheral portion is downsampled to a second resolution that is less than the first resolution. The transitional portion is blended such that there is a smooth change in resolution that corresponds to a change in resolution between a fovea region and a non-fovea region of a retina. An inset region is generated using the HR inset portion and the blended transitional portion, and a background region is generated using the downsampled peripheral portion. The inset region is provided to a HR inset display, and the background region is provided to a peripheral display. An optics block combines the displayed inset region with the displayed background region to generate composite content.

Abstract: Systems and methods for aircraft flight control rigging are described. An example system includes a first set of laser rangefinders to measure, for each laser rangefinder of the first set, a distance from the laser rangefinder to a respective target location on a fixed surface of an aircraft, and a second set of laser rangefinders to measure, for each laser rangefinder of the second set, a distance to a respective target location on a control surface of the aircraft. The example system also includes a processor to (i) receive signals indicative of the distance measured by each rangefinder and (ii) generate a first plot line graphic of the measured distances of each of the rangefinders of the first set to its respective target location and a second plot line graphic of the measured distances of each of the laser rangefinders of the second set to its respective target location.

Abstract: A winch control system having a solid state winch contactor and a boost power supply for a vehicle equipped with an electric winch and especially for off-road vehicles, is disclosed. This invention automatically provides three winch speeds: a “slow start” (“creep”) speed for “parking” the hook and for “sneaking” up on a load, a normal speed for normal winch operation and a fast speed for taking less time to unwind and rewind the winch rope when there is no load on the winch. Protection features for the winch contactor and/or the winch include, but are not limited to, electronic winch motor braking, current limiting, over temperature, undervoltage and reverse battery. Winch current limiting is adjustable from 100 amps to 300 amps, chosen for the purpose of accommodating various winch sizes.

Abstract: One method for developing a data loss prevention model includes receiving, at a processing device, an event record corresponding to an operation performed on a computing device. The event record includes an event type and event data. The method also includes transforming, using the processing device, the event type to an event number corresponding to the event type. The method includes transforming, using the processing device, the event data to a numerical representation of the event data. The method includes associating an indication of whether the event type and the event data correspond to a data loss event with the event number and the numerical representation. The method also includes determining the data loss prevention model using the indication, the event number, and the numerical representation.

Abstract: A winch control system having a solid state winch contactor and a boost power supply for a vehicle equipped with an electric winch and especially for off-road vehicles, is disclosed. This invention automatically provides three winch speeds: a “slow start” (“creep”) speed for “parking” the hook and for “sneaking” up on a load, a normal speed for normal winch operation and a fast speed for taking less time to unwind and rewind the winch rope when there is no load on the winch. Protection features for the winch contactor and/or the winch include, but are not limited to, electronic winch motor braking, current limiting, over temperature, undervoltage and reverse battery. Winch current limiting is adjustable from 100 amps to 300 amps, chosen for the purpose of accommodating various winch sizes.