Abstract: A method and an arrangement for recording intensity patterns occurring on a contact surface by frustrated total reflection, particularly for low-distortion recording of relatively large-area fingerprints, handprints or footprints or other parts of the skin. It is an object of the invention to find a novel possibility for recording intensity patterns occurring on a support surface according to the principle of frustrated total reflection which achieves a high-resolution, low-distortion image of the intensity pattern using simple optical arrangements.

Abstract: The invention is directed to an arrangement for the optoelectronic recording of large-area fingerprints, particularly for acquiring prints of the entire palm of the hand. The object of the invention is to find a novel possibility for recording the papillary ridge pattern of a hand which permits a complete optoelectronic image recording with one-time placement of large-area concave skin parts without the use of optical beam paths that are subject to contamination and without having to accept a loss of resolution.

Abstract: The invention is directed to a method and an arrangement for image recording for data detection and security checking of documents, in particular for automated checking of the authenticity of documents in which hidden information for high-security checking is incorporated. It is the object of the invention to find a novel possibility for image recording for data detection and for checking the authenticity of documents which permits an automated detection of the presence of hidden information and high-resolution recording of hidden information for high-security checking in the shortest possible time and at the lowest cost in apparatus.

Abstract: A floor-supporting configuration in motor vehicles that is optimized to prevent deformation of the foot well of the passenger cell and has a high degree of inherent stiffness in the event of a crash, particularly a head-on collision, while substantially limiting force absorption and force transfer to areas below and behind the passenger cell is provided. The desired stiffness and force transfer is essentially achieved by a special configuration of the longitudinal members, the front floor crossmember, and the sills relative to one another and by a special connection of these elements to one another.

Abstract: The invention is directed to an arrangement and a method for checking optical diffraction structures (e.g., kinegrams) on documents. The object of the invention, to find a novel possibility for checking optical diffraction structures on documents which permits detection of the presence and authenticity of optical diffraction structures quickly and economically with respect to apparatus, is met according to the invention in that the sensor unit is arranged orthogonally above the support surface of the document, and in that the illumination unit contains at least two monochromatic light sources which are arranged so as to emit light bundles at defined incident angles with respect to a surface normal of the document directed to the diffraction structure and which can be switched on sequentially.

Abstract: A method for obtaining image information, for example, about the surface structure of the inside surface of a hand, the edge of a hand, the extended four fingers or an extended thumb with high image quality. The surface to be recorded is placed on a scanning surface and an image of this surface is recorded by means of a beam path. The scanning surface has an aspect ratio BA:HA<1. The aspect ratio of the image is changed during optical transmission from the scanning surface to the optoelectronic image converter, wherein the height is compressed in such a way and/or the width is expanded in such a way that an image which is optically distorted to the aspect ratio of BE:HE>1 reaches the reception surface of the image converter, wherein the optically distorted image is then rectified by a computational operation. An arrangement for carrying out the method is also disclosed.

Abstract: A method and an arrangement for recording intensity patterns occurring on a contact surface by frustrated total reflection, particularly for low-distortion recording of relatively large-area fingerprints, handprints or footprints or other parts of the skin. It is an object of the invention to find a novel possibility for recording intensity patterns occurring on a support surface according to the principle of frustrated total reflection which achieves a high-resolution, low-distortion image of the intensity pattern using simple optical arrangements.

Abstract: An arrangement for detecting the surface structures of fingers, palms or other parts of the skin placed on an image scanning surface, wherein the image scanning surface is formed at a scanning prism, an illumination beam path is directed to the image scanning surface in the interior of the scanning prism, and the light reflected from the latter impinges on the reception surface of an optoelectronic detection device. In an arrangement of the type described above, a part of the illumination beam path or a separate illumination beam path is directed to reference structures which are fixed in place and, from the latter, to the reception surface, wherein separate partial areas of the reception surface are reserved for the detection of the surface structures and for the detection of reference structures.