Abstract: A computer system displays a first object that includes at least a first portion of the first object and a second portion of the first object and detects a first gaze input that meets first criteria, wherein the first criteria require that the first gaze input is directed to the first portion of the first object in order for the first criteria to be met. In response, the computer system displays a first control element that corresponds to a first operation associated with the first object, wherein the first control element was not displayed prior to detecting that the first gaze input met the first criteria, and detects a first user input directed to the first control element. In response to detecting the first user input directed to the first control element, the computer system performs the first operation with respect to the first object.

Abstract: A display system for sensing a finger of a user applied to the display system includes a display panel; a sensor for sensing the finger; a sensing light source configured to emit a first light having a first wavelength W1; and a reflective polarizer disposed between the display panel and the sensor. For a substantially normally incident light, an optical transmittance of the reflective polarizer versus wavelength for a first polarization state has a band edge such that for a first wavelength range extending from a smaller wavelength L1 to a greater wavelength L2 and including W1, where 30 nm?L2?L1?50 nm and L1 is greater than and within about 20 nm of a wavelength L3 corresponding to an optical transmittance of about 50% along the band edge, the optical transmittance has an average of greater than about 75%.

Abstract: A system for interoperating and communicating data from a device having a communications gateway and at least one tactical device connected to an electrified rail providing electrical power. The system includes at least one processor, and at least one non-transitory computer-readable data storage device storing data instructions that, when executed by the at least one processor, cause the system to receive an event from the device, determine whether the event triggers a workflow, and execute an action on the device in response to the workflow being triggered.

Abstract: The component parts of an optical measuring system include two housings (20,22) each of which contains optical elements of the system, and a base (10). The two housings are each provided on at least one face with the complementary parts of a kinematic support (18), and the optical components are arranged within the respective housings so that when the kinematic support is engaged the optical components are properly aligned. The base is provided with a kinematic support (16) on its surface which is arranged so that when the base is aligned with a machine axis, any housing placed on the kinematic support will automatically be aligned with the machine axis. Thus by aligning the base with a machine axis, the optical components of the system will automatically be aligned when the housings are connected to the base and to each other using the kinematic supports.

Abstract: In a method of calibrating the measuring performance and apparatus for a machine, the conventional physical length bar is simulated by moving a retro-reflector to various positions along a track. A laser beam of an interferometer is aligned with the track using the retro-reflector at two extreme positions in order to define a measurement axis for the calibration. The retro-reflector has a part-spherical surface on its rear face which is centered on the nodal point of the retro-reflector. By contacting the reference surface with a probe on the machine at several points, the center of the sphere at the two positions of the retro-reflector can be calculated and hence the measurement axis is defined in the machine frame of reference.

Abstract: Telescopic ball bar 24 has a male member provided by a sphere 22 at one end and a female member provided by a pair of forks 30 at the other. The ball bar is attached to the spindle 10 of a machine tool by a universal pivotal coupling between the sphere 22 and a magnetic socket 14 retained on the spindle 10. The ball bar 24 is attached to the table by a further universal pivotal coupling between a sphere 28 retained on the table 12 in a clamping device 40, and the forks 30. In use, the spindle is operated to move in a circular path about a center defined by the center of the sphere 28. Any deviation of the spindle movement from such a circular path will be detected by a transducer 36, provided in the bar 24, which bears against the surface of the sphere 28. The position of the center of the sphere 28 is determined by bringing the sphere 28 into engagement with the socket 14, and measuring the position of the spindle 10 at that point.

Abstract: A method of and apparatus for dynamically calibrating a machine are disclosed in which a laser interferometer is provided in addition to the machine scales for taking independent measurements of a movement of a machine part while the part is in motion. As the moving machine part reaches pre-determined distances along its movement (e.g. every inch) the readings of the interferometer and the machine scales relating to the movement of the machine part are recorded and compared. Any difference is recorded for use in mapping the machine errors. In the preferred form of the invention a reflector is mounted on the machine spindle adjacent to, or in place of, a tool or measuring probe, and its movements are measured by the interferometer. The interferometer is arranged to generate a signal as each predetermined distance is reached and an infra-red signal is transmitted from the interferometer to a receiver on the machine spindle which is wired into the probe or tool detection circuits.

Abstract: The accuracy with which the distance between the end faces of a length type of gaging standard can be measured by a laser interferometer is improved by mounting the gaging probe at one end of a slide in fixed coaxial alignment with a laser beam target secured to the opposite end thereof. The slide is, in turn, mounted on a slidable carrier to form a V-notch of changeable width containing a steel ball whose weight imparts a predetermined thrust to the gaging probe unaffected by the force required to move the carrier so as to bring the probe into gaging contact with a fixed surface. A planar surface is adjustably swiveled into cohesive coincidence with one end face of the length standard to duplicate the orientation thereof relative to the gaging table which supports the length standard.