Abstract: The blooming effect in pictures of a television camera tube (such as a vidicon, an orthicon or an isocon) is counteracted by setting the cathode potential to a first standard value during one scan of the scanning electron beam and to a second value during a number of subsequent scans of the scanning electron beam. During the one scan picture information is obtained both about bright and dark parts of the picture. During the subsequent scans only picture information is obtained from relatively bright parts of the picture. The videosignals of the different scannings are stored and combined. The resulting combined videosignal comprises picture information about bright or dark parts of the image that otherwise would have been lost.

Abstract: In manufacturing an image detection device for radiographic purposes a matrix consisting of rows and columns of image-recording elements is formed in a substrate of semiconductor material. A protective layer of e.g. SiO.sub.2 or Si.sub.3 N.sub.4 is applied to the surface of the matrix of image recording elements. The layer is provided with grooves. The grooves extend between the rows and columns of image-recording elements. The depth of the grooves is at most equal to the thickness of the protective layer. Subsequently a layer of CsI is applied by vapor deposition on the upper side of the protective layer.

Abstract: An apparatus for slit radiography which comprises an X-ray source and a slit diaphragm through which a body to be examined can be scanned by a planar X-ray fan beam. The slit diaphragm is operatively associated with a plurality of juxtaposed tongue-shaped attenuation elements, which elements are arranged for having their free ends swung to a greater or lesser extent into the X-ray beam so as to effect a local attenuation of the beam. The tongue-shaped attenuation elements form at least one flared configuration as seen from the X-ray source.

Abstract: An apparatus for the non-contact disintegration of concrements present in a body by means of sound shock waves generated by spark discharge between two electrodes in a focus of at least one liquid-filled rotationally symmetrical reflector formed in a reflector block, said sound shock waves being focussed in a focal point situated outside the reflector. Between the focus F.sub.1 and the focal point F.sub.2, in a region .beta. bounded by an imaginary conical surface defined by the edge R of the reflector 2 and the focus F.sub.1, there is positioned an object intercepting sound shock waves impinging thereon.

Abstract: An apparatus for dimensional inspection of an object. The apparatus is adapted to produce a slender beam of measuring radiation for irradiating an object under examination. Reflected light image receiving means are provided including a receiving lens for collecting radiation reflected from an object surface spot irradiated by the measuring beam, and a linear photo-sensitive detector. The receiving lens is dimensioned and disposed relative to the measuring beam and the linear detector as to exclusively project those object surface spots irradiated by a longitudinal section defining a measuring range, of the measuring beam, as focussed dots on the linear photo-sensitive detector area. For improving the resolution of the focussed dots produced on the detector, a beam forming lens is provided for causing the cross-sectional area of the measuring beam to gradually increase over the measuring range.

Abstract: An electronic circuit for determining the position of a light spot produced by a light source (4, 22) on a position-sensitive detector (4,22) having a center terminal (2) and two end terminals (3, 3'). Circuitry is provided for keeping the current (I) applied to the center contact of the position-sensitive detector at a constant level, which circuitry includes means (9) for measuring the current and means (10-18) for compensating for variations in this current by controlling the luminous intensity of the light source (1, 25).

Abstract: An X-ray simulator has an X-ray source and collimator connected to the end of a cantilevered horizontal arm mounted on a gantry that rotates about a horizontal axis and extends along a patient supporting table. The horizontal arm has an asymmetrical cross section that causes the arm and therefore the X-ray source and collimator to deflect by differing amounts as the gantry rotates. To compensate for the varying displacement of the X-ray target point and to adjust the position of the target point along the rotation axis of the gantry, the collimator is pivoted in one direction or the other in accordance with the amount of rotation of the gantry axis.