Abstract: The present invention is concerned with displaying moving objects (targets) wherein two time-shifted object signatures are imaged on a detector. Target scanning is with a prismatic rotating wheel, the periphery of which has a plurality of adjacent, recessed, and oppositely reflecting triplet mirror surfaces which alternately reflect the two signatures onto the detector. The position coordinates of the objects are defined by taking the difference of the detector output signals of the two object signatures. The display is characterized in that the first signature scan is delayed by an intermediate storage so that it shall be simultaneously available with the second signature scan. After taking the difference of the signals of these signature scans, the uncanceled individual signals remaining in the storage are defined as the coordinates of the moving objects and appear as electronic outputs.

Abstract: An improved thermal imaging device is provided herein, which includes an internally-mirrored autocollimating mirror, a multi-element detector and a diaphragm in the mirror for limiting the aperture of the multi-element detector. In the improved device the multi-element detector is offset from the optical axis. At a symmetrical point on the other side of the optical axis, at which the autocollimating mirror forms an image of the multi-element detector, a mirror is disposed. Such mirror project the image of the multi-element detector back to the autocollimating mirror. Such image is then reflected once more right way up and laterally unreversed onto the multi-element detector in such a way that each individual detector element receives its own image.

Abstract: Disclosed is a system for passive and active optical-mechanical scanning of a visual field. A passive channel uses a thermal imaging system scanning in two coordinates and an active channel uses a laser beam which is deflected in two coordinates. During scanning in the active and passive channel specific phase relations are maintained. The system according to the invention represents a device for passive and active scanning of a visual field which works with low transmitting power and in which the mutual interference of active and passive channels is prevented. The system can be used particularly for steering (active channel) of flying bodies or for the control of machines or devices over certain distances.

Abstract: A method and apparatus for scanning two fields of view by optical/mechanical means, in two scanning directions which are disposed essentially at right-angles to one another, and for simultaneously displaying these fields of view, this method utilizing two optical/mechanical scanners, one of the scanning processes, in the line direction, being performed rapidly, and the other scanning process, in the vertical direction, being performed slowly, using only one detector or one detector array, wherein the line-scanning efficiency does not exceed 50% for both fields of view and there is a 180.degree. phase shift between the line scanning processes respectively applied to the two fields of view.

Abstract: In the combination of a daylight aiming device, a night aiming device and a guiding device for tracer missiles emitting infrared beams of a narrow spectral band both the night aiming device and the guiding device work on infrared beams of the same spectral region. This region includes the narrow spectral band of the beams emitted by the missile. Partially transmitting mirror means are arranged along the optical axis of the night aiming device for filtering the missile beams of the narrow spectral band out of the beam bundle and reflecting them to the guiding device, which conducts flight path control signals to the missile. The remaining beams of the spectral region are transmitted to the aiming device. An infrared/visible-light image converter is part of the aiming device. The visible light rays emitted by the converter are reflected into the ocular lens of the aiming device for viewing by the operator.

Abstract: An optical system for scanning thermographic pictures comprises a rotating polygonal cylinder for line scanning in one coordinate direction. The polygonal cylinder is subdivided into an inner stationary solid cylindrical portion and a ring surrounding the cylindrical portion. The ring is on its outer side provided with the polygonal faces and rotates around the cylindrical portion. The cylindrical portion has a single curved face extending substantially perpendicular to the optical axis. The inner wall of the ring and the curved face define between them a cylindrical air lens element. The shape of the curved face is computed in accordance with the image distortions of the optical system so that the air lens compensates for the image distortions.

Abstract: The optics of the present invention are used for the cartesian scanning and reproduction of large image fields.The optics have at least two roof prisms oscillating to and fro perpendicularly to the direction of their roof edges, for the purpose of writing the length of the image line and a conventional optical means is provided behind the roof prism, as seen in the direction of the incident light, for writing the small image angle ( =image height).

Abstract: A method and apparatus for generating a raster image, in particular when using thermal or infra-red radiation, using a suitable optical means to guide image strips of the object over a set of detectors consisting of several detectors mounted normally to the direction of motion of the image strips. The method is improved by passing the strips of the object image twice over the set of detectors (7 ) in one cycle of the optical means (3), the first and second image being relative offset in height.

Abstract: An afocal spectral converter as adaptor for existing aiming and sighting devices for the conversion for instance of a heat picture into a visible picture. The arrangement includes the combination of an infrared picture receiving unit with a picture reproducing unit in such a way that the entire system has the enlargement 1:1. The connection of the adaptor with the main device is such that the optical axis of the picture receiving unit is parallel to the optical axis of the main device, and the parallel ray bundle of the picture reproducing unit is so imaged into the main device that the latter will not be influenced.

Abstract: A method of and thermograph for producing and displaying thermographic pictures, according to which a plurality of rasters of different fineness are superimposed relative to each other. The thermograh for practicing this method includes a dual raster arrangement for producing rasters of different fineness.