Abstract: Provided is an optical modulator for modulating light comprising: a superlattice structure having a plurality of interleaved narrow and wide bandgap semiconductor layers, wherein wave functions of energy states of electrons and holes in different narrow bandgap layers are coupled; and a power supply that applies voltage to the superlattice structure between a first non-zero voltage and a second non-zero voltage to modulate the light.

Abstract: An illumination system (20, 72, 110, 142) for illuminating a scene comprising: an illuminator (24, 74, 116) having a plurality of substantially contiguous independently controllable light (26, 76) providing regions each of which provides light that illuminates a different region of the scene; optics (30) that directs light from the illuminator to the scene; a range finder (22, 64, 112) that determines distances to regions of the scene; and a controller (28, 29, 118) that controls the plurality of light providing regions to provide light for illuminating the scene responsive to distances determined by the range finder (22, 64, 112).

Abstract: A method of producing an optoelectronic circuit comprising: forming a first optoelectronic element of the circuit on a first surface of a semiconductor substrate; forming a second optoelectronic element of the circuit on a second surface of the semiconductor substrate; and wherein the first and second optoelectronic elements communicate via current transmitted through the substrate.

Abstract: An apparatus is provided for 3D imaging of an object comprising a scanning light beam encoded with position data corresponding to the spatial position of the scanning light beam, and an imaging system that images localized surface areas of the object illuminated by the scanning light beam, which imaging system records the position data coded into the scanning beam so that three spatial coordinates of the localized surface areas imaged are determinable using the recorded position data.

Abstract: A camera is provided with through the lens lighting. An light source provides boresighted illumination by using a beamsplitter or mirror to illuminate a field of view which is congruent with the field of view of the image sensor of the camera. The light source can be an extended light source having a dimensions about equal to the image sensor. The surface of the image sensor, the light source or the beam splitter can be modulated such that light directly from the light source does not impinge the sensor.

Abstract: An optoelectronic shutter for radiation, comprising an input plate and an output plate, comprising material substantially transparent to the radiation, each plate having an outer and an inner surface, wherein a recess is formed in the inner surface of at least one of the plates, and wherein respective non-recessed portions of the inner surfaces of the plates are bonded together, and the recess defines a vacuum chamber enclosed by the two plates; a photocathode fixed to the inner surface of the input plate, adjacent the chamber, and a photo-emissive anode, fixed to the inner surface of the output plate, adjacent the chamber and opposite the photocathode.