Abstract: A method and a device for capturing fingerprints with reliably high quality based on fingerprint scanners are disclosed. The invention finds a novel possibility for capturing fingerprints of sufficiently high quality in which comprehensible feedback information of the capture process is given in real time so that the user can undertake any needed corrections of finger placement without active guidance. This object is met according to the invention in that an image processing unit is arranged downstream of the capture unit and a two-dimensional display unit is associated with the capture unit. Depending on results of the fingerprints analyzed in the image processing unit, the two-dimensional display unit displays positive real-time depictions of the fingers placed on the capture surface from an image storage having a library comprising a plurality of animated finger position images for guiding the user in a simple manner.

Abstract: A method and a device for capturing fingerprints with reliably high quality based on fingerprint scanners are disclosed. The invention finds a novel possibility for capturing fingerprints of sufficiently high quality in which comprehensible feedback information of the capture process is given in real time so that the user can undertake any needed corrections of finger placement without active guidance. This object is met according to the invention in that an image processing unit is arranged downstream of the capture unit and a two-dimensional display unit is associated with the capture unit. Depending on results of the fingerprints analyzed in the image processing unit, the two-dimensional display unit displays positive real-time depictions of the fingers placed on the capture surface from an image storage having a library comprising a plurality of animated finger position images for guiding the user in a simple manner.

Abstract: The invention is directed to a method and an arrangement for the optoelectronic recording of a moving object, particularly for recording a finger that is rolled on a support surface. It is the object of the invention to find a novel possibility for electronic recording of rolled fingerprints which enables high-resolution individual images with a high image rate for joining the individual images without gaps to form a total image by means of simple sensors.

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 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.