Abstract: A gaze tracking system includes a contact lens, a photodetector element, a light conditioning element and electronics. The contact lens includes a fiducial having a position. The photodetector element receives a light signal from the fiducial and provides a photodetector output signal. The light signal provides a light intensity pattern at the photodetector. The optical conditioning element receives the light signal and provides a variation in the light intensity pattern on the photodetector in response to changes in the position of the fiducial. And the electronics process the photodetector output signal to calculate the position of the fiducial. A method includes detecting a light signal from a fiducial included in a contact lens, and tracking the contact lens by analyzing the light signal.

Abstract: According to some embodiments, a transparent screen includes a first transparent substrate having a first transparent substrate index of refraction and including a surface relief pattern, a partially reflective coating formed on the surface relief pattern, and a second transparent substrate bonded over the partially reflective coating with an optical adhesive having the first transparent substrate index of refraction.

Abstract: A method for controlling elevator cars of an elevator system according to one example of the present disclosure includes assigning free elevator cars of the elevator system to one of either general service or express priority service (EPS). A destination dispatch controller receives an express priority service (EPS) call. The EPS call can indicate a request for priority service from an EPS call originating location to an EPS call final destination. The controller can determine whether any active EPS assigned car can service the EPS call. A particular elevator car can be an active EPS car when the particular car is carrying out EPS service. When a specific active EPS car can service the EPS call, the controller assigns the specific EPS car to the EPS call. Upon completion of the EPS call, the controller unassigns the EPS car to a free car.

Abstract: Sensing and communicating data from moving animals is described. In various embodiments a logging and communications device is attached to a wild animal such as a bird; the device senses environmental, physiological or behavioral data about the animal and communicates that data wirelessly to other devices (be they on other animals in the environment or at a scientist's base station). This enables scientists to obtain empirical data about animals in their natural environment without disturbing that environment unduly and with improved data retrieval. In various embodiments the device is physically small and lightweight whilst incorporating sensors such as global positioning systems, pressure sensor, light sensor or others and may be used solely to retrieve data or for both logging and communications.

Abstract: This invention generally relates to computer systems and architectures, methods and computer program code for increasing the robustness of process control and manufacturing automation systems and the like, in particular to provide improved handling of error and/or failure conditions. We describe an architecture for an OPC Failover system, the architecture comprising: a plurality of OPC servers; at least one OPC client; a computer network linking said OPC servers and said OPC client; and an OPC Failover service coupled to said network and not coupled between said OPC client and said OPC servers, said OPC Failover service being configured to monitor at least one of said OPC servers for an error condition and to redirect network communications of said OPC client from one of said servers to another on detection of said error condition.

Abstract: A portable video projector includes facility to direct a projected image field along an axis in an alignment corresponding to the state of an optical element.

Abstract: A drill bit for drilling a wellbore, the drill bit having a cutter which has tungsten carbide inserts and a spear point. The spear point has a neck that joins a smooth portion of the cutter and blades that extend from the neck and converge to an apex. The blades define valleys or spaces between them. A layer of hardfacing is applied to the entire spear point including the interim spaces and the neck.

Abstract: A scan assembly of an image generator sweeps an image beam in a first dimension at a first rate and bi-directionally in a second dimension at a slower rate. Sweeping the beam bi-directionally in the vertical dimension (generally the dimension of the lower sweep rate) can reduce the scanning power by eliminating the flyback period, and, where the scan assembly includes a mechanical reflector, can reduce the error in the beam position without a feedback loop by reducing the number of harmonics in the vertical sweep function. Furthermore, because the image beam is “on” longer due to the elimination of the flyback period, the scanned image is often brighter for a given beam intensity. The scan assembly may also sweep the image beam non-linearly in the vertical dimension, and this sweep may be bi-directional or uni-directional. Sweeping the beam non-linearly can also reduce the error in the beam position by reducing the number of harmonics in the vertical sweep function.

Abstract: A scan assembly of an image generator sweeps an image beam in a first dimension at a first rate and bi-directionally in a second dimension at a slower rate. Sweeping the beam bi-directionally in the vertical dimension (generally the dimension of the lower sweep rate) can reduce the scanning power by eliminating the flyback period, and, where the scan assembly includes a mechanical reflector, can reduce the error in the beam position without a feedback loop by reducing the number of harmonics in the vertical sweep function. Furthermore, because the image beam is “on” longer due to the elimination of the flyback period, the scanned image is often brighter for a given beam intensity. The scan assembly may also sweep the image beam non-linearly in the vertical dimension, and this sweep may be bi-directional or uni-directional. Sweeping the beam non-linearly can also reduce the error in the beam position by reducing the number of harmonics in the vertical sweep function.

Abstract: A circuit for detecting a phase error between a clock signal and a beam position includes a beam generator, a sensor, and a phase detector. The beam generator directs a beam toward a beam sweeper in response to the clock signal, and the sensor detects the beam as directed from the beam sweeper. The phase detector determines from the detected beam the error in the clock phase relative to the beam position. Such a circuit can automatically detect the phase error in the pixel clock and correct this error, thus eliminating the need for a manual phase-error corrector. The circuit may also be able to adjust the width and/or the height of a scan region, and thus may also be able to adjust the width and/or height of an image frame within the scan region.

Abstract: A position sensor including a sensor assembly adapted to mount to a first rail of an automotive seat rail assembly. The sensor assembly includes a Hall device and a magnet. The assembly is mountable to the first rail to cause a first output of the Hall device when the first rail is in a first position relative to a second rail of the automotive seat rail assembly, and to cause a second output of the Hall device when the first rail is in a second position relative to the second rail.

Abstract: A multi-standard connection hub includes a housing (110) having a first surface (111), a second surface (112) spaced apart from the first surface, and a sidewall (113) extending between the first surface and the second surface. The multi-standard connection hub further includes a first connection port (120) at the first surface and a second connection (210) port at the sidewall. The first connection port operates according to a first standard and the second connection port operates according to a second standard.

Abstract: This invention generally relates to computer systems and architectures, methods and computer program code for increasing the robustness of process control and manufacturing automation systems and the like, in particular to provide improved handling of error and/or failure conditions. We describe an architecture for an OPC Failover system, the architecture comprising: a plurality of OPC servers; at least one OPC client; a computer network linking said OPC servers and said OPC client; and an OPC Failover service coupled to said network and not coupled between said OPC client and said OPC servers, said OPC Failover service being configured to monitor at least one of said OPC servers for an error condition and to redirect network communications of said OPC client from one of said servers to another on detection of said error condition.

Abstract: System and method for tracking user activity. A user accessing a first web page is identified and an impression associated with the first web page that is selected by the user is determined. The impression is assigned a unique identification and is one of a plurality of impressions for directing the user to a second web page. The unique identification of the selected impression is transmitted to a website associated with the second web page upon the user selecting the impression and data is received from the website indicating that the user successfully performed at least one predetermined task and the unique identification. The received data is stored in a memory unit.

Abstract: An image generation apparatus provides interpolation and distortion correction. The interpolation and distortion correction may be provided in one or two dimensions. Nonlinear image scan trajectories, such as sinusoidal and bi-sinusoidal trajectories are accommodated. Horizontal and vertical scan positions are determined using a linear pixel clock, and displayed pixel intensities are determined using interpolation techniques.

Abstract: An integrated photonics module includes at least one light source and a MEMS scanner coupled to and held in alignment by an optical frame configured for mounting to a host system. According to some embodiments, the integrated photonics module may include a plurality of light sources and a beam combiner coupled to the optical frame. According to some embodiments, the integrated photonics module includes a selective fold mirror configured to direct at least a portion of emitted light toward the MEMS scanner in a normal direction and pass scanned light through to a field of view. The selective fold mirror may use beam polarization to select beam passing and reflection. The integrated photonics module may include a beam rotator such as a quarter-wave plate to convert the polarization of the emitted light to a different polarization adapted for passage through the fold mirror. The integrated photonics module may include one or more light detectors.

Abstract: A portable video projector includes facility to direct a projected image field along an axis in an alignment corresponding to the state of an optical element.

Abstract: A display system includes an angle-mapped display engine operable to launch angle-mapped image-bearing rays through an image-guiding substrate for display.

Abstract: A display system includes structures operable to provide an image guided substrate configuration adapted to an application.