Abstract: Apparatus for the layer-wise imaging of an object by means of a large number of radiation sources which are situated in a radiation source plane and whose radiation beams intersect one another so that the approximately equally large radiation beam cross-sections which are situated in one irradiation plane almost completely cover one another. A record carrier is arranged on the other side of the object in order to record perspective images produced by the radiation beams. A imaging matrix which comprises imaging elements for the superposition of the perspective images on an image display device is disposed behind the record carrier. Displacement means are provided in order to realize a relative movement between the irradiation plane and the object or an object table carrying the object.

Abstract: The invention relates to a device for the imaging layers of a three-dimensional object. The device comprises a group of radiation sources which are situated in a common radiation source plane in order to irradiate an object arranged on an examination table. The drive also comprises a record carrier situated underneath the object for recording a source-distribution encoded image of the object. The encoded image consists of respective perspective images. The radiation source group and the record carrier are arranged to slide in opposite directions in parallel planes relative to the stationary object during a radiographic recording. Each of the connecting lines between the radiation sources and the center of the record carrier, pass through a corresponding fixed point in the object for all positions of the radiation source group.

Abstract: For the formation of layer images of a three-dimensional object, the object is irradiated from a large number of radiation source positions which are situated in one plane. Thus, a coded image of the object, consisting of individual perspective images, is formed. Subsequently, the coded image is illuminated and the perspective images thereof are superposed for the reconstruction of the object by means of a lens matrix which extends parallel to the plane of the coded image and whose flat lens distribution corresponds to the distribution of the radiation source positions. In the superposition zone of the perspective images, a photosensitive element is introduced in order to form individual layer images of the object. For the formation of the different layer images on the photosensitive element, the lens matrix is displaced in the direction of the optical axis, and the photosensitive element is positioned each time within the depth of focus range of the lenses of the lens matrix.

Abstract: Apparatus for examining objects includes a group of X-ray sources, which are activated group-wise by a generator. A group of sub-images are separately projected onto a photographic film. During a subsequent step, the film is re-imaged with the aid of an optical lens matrix the lenses in the matrix are arranged in a manner similar to the X-ray sources.

Abstract: A method for forming a layered image of a three-dimensional object which is irradiated from different directions by a plurality of radiation sources. n coded superposition images, in different image planes, of a single movement phase are sequentially recorded on a mechanically moved detector face. Decoding of the n superposition images is realized by means of a coordinate matrix whose coordinates correspond to the geometry of the radiation source distribution, so that these images are successively electronically superposed and summed, for a number of times which equals the number of radiation sources. The same layer of the object is decoded n times and the n decoded layers are summed to form a layered image.

Abstract: A method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, whereby the object is recorded in two steps, each with a plurality of radiation sources of different orientation on the same recording material.Negatives of the two images are produced, after which the positive of one image is combined with the negative of the other image, the combined images being subsequently multiplied by means of point holograms formed with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to those of the point images of the two source arrays recorded by a pinhole camera, the two multiplied images being superposed in one plane, the coded images being decoded by changing their scale with the aid of two synchronously controlled zoom lenses whereby the coordinates of the point image function of an image of an object layer in the coded images are adapted to the points stored in the two point holograms.

Abstract: A method of layer-wise reproduction of three-dimensional images by way of a number of simultaneously recorded, encoded superposition images of different image planes. The object is irradiated from different directions. Simultaneous-superposition images of the object are recorded in encoded form, by means of a large number of m sources, from different directions in a number of n planes which are situated one below the other. The decoding of these images for the layer-wise reproduction of the three-dimensional object is effected so that for each individual layer each of the n simultaneous-superposition images, whose scale has been adapted relative to each other, is simultaneously or consecutively shifted and summed on a single recording medium a number of times which corresponds to the number of m sources during the recording of the object.