Abstract: Detector of suspended cables specially suited for avionic applications formed mainly by a scanning system (S) provided with a noise generator (1) and scan concentrator (3); by a Lidar system (L) and an extractor system (E). The latter is composed of a background filter (7) and a chain extractor (8). This detector, if included in the on board instrumentation of light aircrafts and helicopters, is in condition of supplying the pilot with a warning signal if suspended cables are detected in the flight path during low altitude flights. The instrument gives the cable position and allows the selection of the right corrective move.The invention finds its most convenient application in the flight safety field while that of the avionic optical radars is the specific technical field of this device.

Abstract: An improved method for use in fabricating individual semiconductor radiation detectors on a chip is characterized by forming generally V-shaped grooves converging toward one another from opposite sides of the chip into the thickness dimension thereof. The grooves meet within the chip and serve to separate individual detectors.

Abstract: Disclosed is a parallel/series infrared scanner for detecting thermal images. "N" infrared detecting elements are arranged in series to scan a single portion of an I.R. image. Adjacent portions of the I.R. image are scanned by additional elements also arranged in series but parallel to the "N" series of elements. The specific detector elements can be selectively activated in order to compensate for disuniformity among detectors in the series. Thus, it is unnecessary to utilize precisely identical infrared detector elements because the number of activated elements in a single series can be adjusted to provide a uniform output which is precisely matched to the output of the other series of detectors.

Abstract: A cryogenic container with low thermal losses for infra-red detecting devices, with integrated feed-through connections, wherein said container consists of two elements adapted to have their outer walls joined, the two walls having two edges with surfaces facing one another to define an annular zone arranged to receive vacuum sealed feed-through connections in the form of a substrate on which a multiplicity of conductors is formed by micro-circuitry techniques. The conductors extend through the annular zone and project both inward and outward of the outer wall. A flexible element is provided for contacting an active element inside the cryostat with the conductors. The flexible element consists of a layer of plastic material supporting a multiplicity of conductive tracks.