Abstract: An apparatus for direct optical recording of skin prints has a display below the placement surface and a light guide layer below the display. The light guide layer has light in-coupling at a narrow side and light out-coupling structures in the surface. By means of angles ? of the light out-coupling structures and differences in the refractive indices of the neighboring layers, a directed coupling out of light occurs in the direction of the placement surface causing a total internal reflection at the placement surface. The display has a transparency of at least 1% of the coupled out light. A first and second adhesion layers are between the display and the light guide layer and between the light guide layer and the sensor layer. The refractive indices of the adhesion layers are at least 1% to 30% lower than those of light guide layer, the display and the sensor layer.

Abstract: A display with integrated matrix sensor for the optical recording of the papillary structure of at least one finger (F), in which an angular diaphragm with an aperture is arranged in each instance in front of the individual sensor elements of the matrix sensor, which aperture is offset relative to the sensor element in each instance in an offset direction (RV). Because of different dimensioning of the apertures and/or different offset directions (RV), the acceptance angle of the sensor elements of the matrix sensor is also influenced in direction orthogonal to the offset directions (RV) so that the display is suitable for making a recording having an isotropic and high contrast. The invention is also directed to a method by which, using a display according to the invention with integrated matrix sensor, an initial recording is transformed into a corrected recording having an at least approximately isotropic and high contrast.

Abstract: An apparatus for direct optical capture of security-relevant objects such as at least skin prints and documents produces a contrast between skin ridges and skin valleys in direct optical sensors for capturing skin prints in the range of contrast of conventional systems with frustrated total internal reflection. A contrast enhancing layer is provided with one contrast shield associated with each light-sensitive element of the sensor layer. The associated contrast shield is arranged at a distance above the light-sensitive element and has a surface area at least as large as an active region of the light-sensitive element). The contrast shield is arranged at a distance above the light-sensitive element such that at least 60% of the active region is covered. The illumination layer has a plurality of point light sources which emit in direction of the placement surface in an angular area limited for preventing total internal reflection.

Abstract: A display with integrated matrix sensor for the optical recording of the papillary structure of at least one finger (F), in which an angular diaphragm with an aperture is arranged in each instance in front of the individual sensor elements of the matrix sensor, which aperture is offset relative to the sensor element in each instance in an offset direction (RV). Because of different dimensioning of the apertures and/or different offset directions (RV), the acceptance angle of the sensor elements of the matrix sensor is also influenced in direction orthogonal to the offset directions (RV) so that the display is suitable for making a recording having an isotropic and high contrast. The invention is also directed to a method by which, using a display according to the invention with integrated matrix sensor, an initial recording is transformed into a corrected recording having an at least approximately isotropic and high contrast.

Abstract: An apparatus for direct optical recording of skin prints has a display below the placement surface and a light guide layer below the display. The light guide layer has light in-coupling at a narrow side and light out-coupling structures in the surface. By means of angles ? of the light out-coupling structures and differences in the refractive indices of the neighboring layers, a directed coupling out of light occurs in the direction of the placement surface causing a total internal reflection at the placement surface. The display has a transparency of at least 1% of the coupled out light. A first and second adhesion layers are between the display and the light guide layer and between the light guide layer and the sensor layer. The refractive indices of the adhesion layers are at least 1% to 30% lower than those of light guide layer, the display and the sensor layer.

Abstract: An apparatus for direct optical capture of security-relevant objects such as at least skin prints and documents produces a contrast between skin ridges and skin valleys in direct optical sensors for capturing skin prints in the range of contrast of conventional systems with frustrated total internal reflection. A contrast aperture layer is provided with one contrast aperture associated with each light-sensitive element of the sensor layer. The associated contrast aperture is arranged at a distance above the light-sensitive element and has a surface area at least as large as an active region of the light-sensitive element). The contrast aperture is arranged at a distance above the light-sensitive element such that at least 60% of the active region is covered. The illumination layer has a plurality of point light sources which emit in direction of the placement surface in an angular area limited for preventing total internal reflection.

Abstract: A device for direct optical recording of skin prints offers recording of human skin prints for personal identification permitting a display layer directly below the placement surface. A light guide layer arranged below the sensor layer has at least one LED at a narrow side and light out-coupling structures which, by means of an inclination angle c and differences in the refractive indices relative to neighboring layers, permit a directed coupling out of light at a defined angle which results in total internal reflection at the placement surface at the air interface and with a small divergence angle range of ?+/?15°. A first adhesion layer between cover layer and sensor layer and a second adhesion layer between sensor layer and light guide layer are provided, the refractive indices of which are 1% to 30% lower than the refractive indices of light guide layer and sensor layer.

Abstract: An arrangement and method for optical recording of live skin areas of human autopodia and documents has a layer body comprising sensor layer with light-sensitive elements in regular pixel rasters, transparent protective layer above the sensor layer as placement surface for skin areas or documents is integrated in a mobile image capture device having at least one display for user guidance and an internal power supply. The layer body has an area light-emitting layer under the sensor layer to emit light in a first angle range for frustrated total internal reflection at the placement surface when autopodia are placed thereon and to emit in a second angle range to illuminate documents on the placement surface. A controlling and data processing unit handles preprocessing and reducing captured image data and an electronic interface for wireless coupling of the image capture device with a further electronic device for image data processing.

Abstract: A device and method for direct optical recording of live skin areas, particularly of fingerprints or handprints, is disclosed. A novel possibility for direct optical recording of human skin prints with forensic quality where interference through ambient light is excluded is achieved in that, from a skin area to be recorded, image data of a calibration image generated under homogeneous illumination from an areal source and ambient light that may be present are read out from the sensor array, an adapted illumination pattern is calculated by means of the stored calibration image such that, through application of the adapted illumination pattern, a two-dimensionally structured illumination pattern is generated to minimize the influence of the ambient light and to homogenize the illumination at least of the deposited skin print, wherein an illumination array is controlled in individual light-emitting elements or in groups of light-emitting elements with the calculated illumination pattern.

Abstract: A device for direct optical recording of skin prints offers recording of human skin prints for personal identification permitting a display layer directly below the placement surface. A light guide layer arranged below the sensor layer has at least one LED at a narrow side and light out-coupling structures which, by means of an inclination angle c and differences in the refractive indices relative to neighboring layers, permit a directed coupling out of light at a defined angle which results in total internal reflection at the placement surface at the air interface and with a small divergence angle range of ?+/?15°. A first adhesion layer between cover layer and sensor layer and a second adhesion layer between sensor layer and light guide layer are provided, the refractive indices of which are 1% to 30% lower than the refractive indices of light guide layer and sensor layer.

Abstract: An arrangement and method for optical recording of live skin areas of human autopodia and documents has a layer body comprising sensor layer with light-sensitive elements in regular pixel rasters, transparent protective layer above the sensor layer as placement surface for skin areas or documents is integrated in a mobile image capture device having at least one display for user guidance and an internal power supply. The layer body has an area light-emitting layer under the sensor layer to emit light in a first angle range for frustrated total internal reflection at the placement surface when autopodia are placed thereon and to emit in a second angle range to illuminate documents on the placement surface. A controlling and data processing unit handles preprocessing and reducing captured image data and an electronic interface for wireless coupling of the image capture device with a further electronic device for image data processing.

Abstract: An arrangement and method for optical recording of live skin areas of human autopodia and documents has a layer body comprising sensor layer with light-sensitive elements in regular pixel rasters, transparent protective layer above the sensor layer as placement surface for skin areas or documents is integrated in a mobile image capture device having at least one display for user guidance and an internal power supply. The layer body has an area light-emitting layer under the sensor layer to emit light in a first angle range for frustrated total internal reflection at the placement surface when autopodia are placed thereon and to emit in a second angle range to illuminate documents on the placement surface. A controlling and data processing unit handles preprocessing and reducing captured image data and an electronic interface for wireless coupling of the image capture device with a further electronic device for image data processing.

Abstract: A device for contact-based capture of human autopodial prints using disturbed total internal reflection, comprising a protective body with a contact surface, a sensor layer comprising light-sensor elements in an array for detecting light of a predefined wavelength range, and a light guide. Passband areas transparent for light of the predefined range are between the sensor elements. The light guide is transparent to light in the range and includes parallel lower and upper faces. The faces define a coupling-in surface for light emitted from a light source in a limited angular range around a preferred direction. Due to the directed angle of incidence, light entering the light guide is totally internally reflected at the faces. A mirror layer between the sensors and the guide reflects some light back into the light guide and transmits other light. Light exiting the guide is homogenized dependent upon a distance to the light source.

Abstract: A device and method for direct recording of prints of a rolled finger provide optimal recording of rolled fingerprints by a user by visually displayed influencing of the rolling movement during the roll process. By direct recording of the rolled finger by a layer body with a sensor layer of two-dimensional matrix of sensor elements and a parallely opposite support surface on which the finger can be rolled, the distance between the sensor layer and the support surface is less than five times the mean distance between adjacent sensor elements. A light source with lighting elements that can be controlled individually or in groups to generate light portions through the support surface as visible patterns for user information with spatial and temporal reference to the rolling finger. An electronic control unit controls the light source in different areas of the support surface to generate a pattern variable over time.

Abstract: A device for capturing prints of areas of skin of human autopodia or parts thereof supplied with blood, including: a contact surface for placing on an area of skin; a composite containing a sensor layer with light-sensitive sensor elements arranged in a first pixel grid; and light-emitting elements. The light-emitting elements are arranged to form a second pixel grid. They emit light in a frequency range for which the sensor layer is at least partially transparent, with the result that light emitted from the contact surface in the direction of an area of skin can be coupled into it. The light-emitting elements can be actuated individually or in groups and thus switched on and off, with the result that these light-emitting elements can be actuated for the representation of visual information in dependence on intensity values determined by the light-sensitive sensor elements for display on the contact surface.

Abstract: An arrangement and method for optical recording of live skin areas of human autopodia and documents has a layer body comprising sensor layer with light-sensitive elements in regular pixel rasters, transparent protective layer above the sensor layer as placement surface for skin areas or documents is integrated in a mobile image capture device having at least one display for user guidance and an internal power supply. The layer body has an area light-emitting layer under the sensor layer to emit light in a first angle range for frustrated total internal reflection at the placement surface when autopodia are placed thereon and to emit in a second angle range to illuminate documents on the placement surface. A controlling and data processing unit handles preprocessing and reducing captured image data and an electronic interface for wireless coupling of the image capture device with a further electronic device for image data processing.

Abstract: A device for contact-based capture of human autopodial prints using disturbed total internal reflection, comprising a protective body with a contact surface, a sensor layer comprising light-sensor elements in an array for detecting light of a predefined wavelength range, and a light guide. Passband areas transparent for light of the predefined range are between the sensor elements. The light guide is transparent to light in the range and includes parallel lower and upper faces. The faces define a coupling-in surface for light emitted from a light source in a limited angular range around a preferred direction. Due to the directed angle of incidence, light entering the light guide is totally internally reflected at the faces. A mirror layer between the sensors and the guide reflects some light back into the light guide and transmits other light. Light exiting the guide is homogenized dependent upon a distance to the light source.

Abstract: A device and method for direct optical recording of security-related objects without optically imaging elements is disclosed. Direct optical recording of skin prints and documents, wherein interference through ambient light is excluded, is met by a sensor layer with TFT technology arranged on a substrate layer transparent at least in the visible wavelength range. Light-sensitive elements of the sensor layer have a distance from the object of less than the mean pixel spacing defined by the pixel grid and have in each instance a control of the exposure time. A primary light-emitting layer is constructed to illuminate the object by at least light portions from direction of the sensor layer through the placement surface. All layers of the layer body located between primary light-emitting layer and placement surface transmit at least portions of light in the visible wavelength range.

Abstract: A device and method for direct optical recording of live skin areas, particularly of fingerprints or handprints, is disclosed. A novel possibility for direct optical recording of human skin prints with forensic quality where interference through ambient light is excluded is achieved in that, from a skin area to be recorded, image data of a calibration image generated under homogeneous illumination from an areal source and ambient light that may be present are read out from the sensor array, an adapted illumination pattern is calculated by means of the stored calibration image such that, through application of the adapted illumination pattern, a two-dimensionally structured illumination pattern is generated to minimize the influence of the ambient light and to homogenize the illumination at least of the deposited skin print, wherein an illumination array is controlled in individual light-emitting elements or in groups of light-emitting elements with the calculated illumination pattern.

Abstract: A device and method for direct optical recording of live skin areas, particularly of fingerprints or handprints, is disclosed. A novel possibility for direct optical recording of human skin prints with forensic quality where interference through ambient light is excluded is achieved in that, from a skin area to be recorded, image data of a calibration image generated under homogeneous illumination from an areal source and ambient light that may be present are read out from the sensor array, an adapted illumination pattern is calculated by means of the stored calibration image such that, through application of the adapted illumination pattern, a two-dimensionally structured illumination pattern is generated to minimize the influence of the ambient light and to homogenize the illumination at least of the deposited skin print, wherein an illumination array is controlled in individual light-emitting elements or in groups of light-emitting elements with the calculated illumination pattern.