Abstract: An electro-optically tuned organic dye laser having an electro-optic cell d a diffraction grating. A varying electrical field is supplied to the cell to cause the laser beam to be swept across the stationary diffraction grating which reflects a specific wavelength for each angle of incidence.

Abstract: A monopulse pulse width discriminator for differentiating between input sals on the basis of pulse width and amplitude, having discriminator and timing circuits which outputs gate a video track loop fed by the modified input signal.

Abstract: A radar system for determining the position of a target using a radio frency source of opportunity. The system uses an interferometer antenna and cross-correlation techniques to measure the time delay in receiving a reflected signal from the target as compared to receiving a direct signal from the signal source. Thereby, the distance from the RF source via the target to the antenna is determined. Additionally, the system uses a plurality of interferometer antennas and cross-correlation techniques to measure the relative phase difference between the signals received by the antennas. Thereby the angle of arrival of the reflected signals from the target is determined. Combining the range and angular information locates the target.

Abstract: Tuning a laser with a piezoelectric crystal having a reflective surface, rein surface acoustic waves (SAW) deform the reflective surface of the crystal to create a diffraction grating.