Abstract: An electromagnetic radiation detector system is disclosed which includes a detector of semiconductor material in the form of a superlattice having a plurality of layers of a first conductivity type spaced by alternate layers of a second conductivity type forming a layered structure having distinct natural energy band gap responsive to a narrow band of electromagnetic wavelengths, but which can be tuned by physical or electromagnetic devices to alter the band of wavelengths to which the detector responds. The system includes electrodes connecting the sensor to an output device.

Abstract: A Schottky barrier type radiation detector in combination with a mirror positioned from the barrier by a distance longitudinally equal to one quarter wavelength of the radiation being detected.

Abstract: A three-dimension or stereo television viewing system is disclosed which multiplexes alternate left-right image presentations from two television cameras which are separated horizontally and aimed so that their optical axes intersect. One field of the standard interlace frame is selected from the left-hand camera and multiplexed but the alternate field from the right-hand camera with the multiplexed video frame being displayed on the standard television monitor. An electrically controlled viewer is provided for each user which employs electro-optic shutter lenses which are caused to switched in synchronisims with the alternating television fields. Direct connection between the viewers and the rest of the system is eliminated by the provision of a photoemitting and photodetection system in which coded pulses from the photoemitters are utilized by the photo detectors to operate the lenses of the stereo viewers in synchronism with the TV fields.