A computer system that includes a plurality of processing elements for parallel computation utilizes a free-space optical network for communication between the processing elements. Such a network employs an optoelectronic switch that includes a binary H-type tree for routing signals to selected ones of an array of lasers. Hybrid repeaters are included in the optical paths to generate output optical beams colinear that are with incident input beams.

An optoelectronic amplifier in which a light-receiving element, such as a photoconductive element, a light-emissive element, such as a PN junction light emitter, and a negative resistance element, such as tunnel diode, are suitably combined to form a system wherein an input light signal is received and converted into an electrical signal by the light-receiving element, and the negative resistance element is controlled by the converted electrical signal to switch the light-emissive element on and...

The invention relates to an optoelectronic keyboard comprising transmitting elements and receiving elements activated in multiplex operation, with the changes in the luminous flux caused by actuation of keys resulting in a signal which defines the actuated key. The invention resides in arranging the transmitting and receiving elements in a main body of the keyboard which comprises a separate cover acting as optical and electromagnetic shielding. The space serving to guide the radiation is prefer...

The invention relates to an optoelectronic sensor having a light transmitter for the transmission of a transmitted light beam into a monitored region, having a light receiver for the reception of a received light beam, which is formed by the transmitted light reflected in the direction of the light receiver from an article in the monitored region, wherein the received light beam stands at a variable beam angle to the transmitted light beam in dependence on the spacing of the article from the sen...

Optoelectronic components, in particular those comprising a line of luminescent diodes arranged in a row, are provided according to the prior art with contacts that have a number of disadvantages, some of which are that the light efficiency is relatively low and that irregularities in the light efficiency of a row occur due to incorrect adjustments of the contacts. According to the invention the contact is therefore designed as a contact bridge passing transversely over the contact window, so th...

The invention is directed to an optoelectronic mixer for demodulating a high-frequency light signal amplitude modulated at a signal frequency (f.sub.sig) The optoelectronic mixer includes a light sensor for receiving and converting the light signal into free charge carriers. The light sensor has at least two individually drivable sensor electrodes and a reference frequency generator supplies an alternating-current voltage at a reference frequency (f.sub.ref). The reference frequency generator is...

An optielectronic device comprising a substrate crystal whose crystal plane is a (n11) plane tilted from the (100) plane toward the [110] direction, or [110] direction where (n>1). When the substrate is applied to an AlGaInP semiconductor laser, the optical device can be cleaved into a rectangular shape, as in the case of a (100) substrate crystal, resulting in easy handling of the chips and also is effective for making the lasting wavelength shorter, lowering the threshold current density fo...

This invention relates to an optoelectronic cable assembly which utilizes standard connector elements as part of the termination assemblies. Mounted in each termination assembly are a plurality of termination elements each of which is adapted to have a fiber optic light conducting cable secured therein. An active optoelectronic device is mounted in a suitable mounting means in each of the termination elements and contact means are attached at one end through the mounting means to make electrical...

An optoelectronic transducer for the conversion of lightwaves to electrical voltage or current, or of voltage or current to lightwaves is disclosed, the transducer comprising a fiber optical system (K, L), a support (T) on which an optoelectronic structural element (D) with at least first and second electric leads (E1/D1, E2/D2/DD) is fastened, and a hole (LO) through the support (T) so arranged that the optically active point of the structural element (D) is directed onto the fiber optical syst...

An optoelectronic stadia is proposed, which is intended for a levelling system with a rotary laser. The stadia has at least one vertical row of light sensitive diodes, which are electrically connected in matrix form. One diode pair in each case forms one matrix node. The column signals and line signals are decoded and evaluated in an evaluation apparatus and the measured result is supplied to a display means. The matrix arrangement of the diodes leads to a very simple construction with relativel...