Abstract: An apparatus for testing critical design parameters in liquid crystal devices compensates for system-imposed influences on measured values, provides real-time correction for variations in spectral content of the source illumination and permits optimization of the values of control parameters.

Abstract: A system for measuring and analyzing body mechanics of a subject includes receivers, transmitters, a display and a processor. The processor which includes a controller which controls the timing of signals from the transmitters so that a signal from each of the transmitters contains an encoded signature which unambiguously identifies the signal as coming from that particular the transmitter. The processor also include a detector which detects signal transmissions as the signal transmissions arrive at the receivers, a signature determinator which recognizes the signature and determines from which particular transmitter the detected signal originated, a local timer which measures a temporal delay between times of emission of the signals from the transmitters and their detection at the receivers.

Abstract: A system for training a pitcher to pitch a baseball includes a plurality of emitting body markers worn by the pitchers, a plurality of position detectors for measuring both the position of the emitting body markers and the position of the pitched baseball, a target, a processor and a display. The processor is coupled to the emitting body markers, the position detectors and the target. The pitcher pitches the baseball to the target. The display is coupled to the processor. Each position detector is a locating array which has at least one ultrasonic transmitter and at least three non-collinear ultrasonic receivers. The locating array is disposed in the path of flight of the pitched baseball and and is used to determine the speed and the trajectory of the pitched baseball. The position of the emitting body markers are measured either optically or ultrasonically over a period of time so as to enable the analysis of the pitcher's body mechanics.