A light actuated switch apparatus is described in which no movable switch contacts are employed. The switch uses a light source and shutter to activate an array of light sensitive devices to generate a binary code that provides the switching function. One embodiment of the switch apparatus is employed inside a control knob providing a binary code generated by shutter action of a light source on an array of phototransistors. Another embodiment employes the above control knob including switch appa...

An optoelectronic device comprising a photoconductor and an emitter which are electrically interconnected, the photoconductor being made from low-resistance semiconductor material with high-resistance inclusions forming n.sup.+n or p.sup.+p junctions at their boundaries in accordance with the type of conductivity of said semiconductor material, which ensures the generation of infralow-frequency electric oscillations.

An optoelectronic memory comprising the following elements placed one after another in succession downstream the original beam from the source of electromagnetic radiation: a means for scanning the original beam, which is electrically connected to an address register, a means for splitting the original beam into m beams forming a scan pattern and a focusing lens. The focusing lens is followed by n beam splitters whose number along each beam direction is equal. The memory also comprises .vertline...

Logic circuits employ photoresponsive GaAs field effect transistors to directly drive GaAs laser diodes to provide optical output signals in response to optical input signals. Since the only electrical inputs are DC bias voltages, each such circuit can be readily decoupled, such as for use in electrically noisy environments. The optical output represents a predetermined logic condition in response to a predetermined operating current applied to the laser diode as a result of the operation of the...

In an optoelectronic switch, a photodiode is used as an optical-to-electrical converter in which a first semiconductor including a p-n junction is combined with a second semiconductor having a narrower energy band gap than the first semiconductor to form a heterojunction. When supplied with a light signal modulated by an electrical signal, the photodiode becomes ON or OFF depending upon the magnitude of a reverse bias voltage applied to said photodiode. A source for applying the bias voltage to ...

The invention relates to an optoelectronic module with at least one carrier element, at least one optoelectronic component that is connected to the carrier element and can emit and/or receive light, and at least one adjusting opening arranged in the carrier element for receiving at least one adjusting means. An exact positioning of the optoelectronic module can be achieved through the adjusting opening arranged in the carrier element. The invention also relates to an optoelectronic system with a...

An optoelectric circuit for measuring the different optical densities of an image carrier, a toned test patch in an otherwise untoned imaging area of a photoconductor surface in a xerographic apparatus, wherein a LED (46) irradiates a test area of the surface, a phototransistor (47) receives radiation reflected from the text area, an amplifier (51) amplifies the output signal of the phototransistor, the LED is driven by the amplified output current of the phototransistor, and the current through...

An avalanche photodiode including a substrate, a first semiconductor region of a first conductivity type having a relatively large band gap, a second semiconductor region of a second conductivity type having a relatively large band gap, and a third semiconductor region of the first conductivity type having a band gap smaller than the band gap of the first and second semiconductor regions, is disclosed in which, in order to suppress an increase in dark current and to cause the avalanche photodiod...

A device for acceleration measurements and, in particular, for gravitational field measurements in, for example, earth orbits, which has a body arranged movably in a force field, the position of which can be detected by a position location device. The force acting upon the body is anisotropic and, at least in the direction of the acceleration to be determined, is not a linear function of the deflection of the body from its resting position. In a preferred further development the body is suspende...

An optoelectronic modulator for generating an optical signal in which a wafer (10) of optoelectronic material has two parallel light wave conductors (13a,13b) and three planar electrodes (14a,14b,14c). The latter are arranged so that two electrodes adjacent each other define by their long sides an elongate intermediate space with at most three sections, which are transversely displaced in relation to each other. One long side of one of the sections is situated approximately in the line of extens...