A device for simultaneous contact-based taking of impressions of multiple perfused skin regions of human autopods by means of disturbed total internal reflection, comprising, as seen from the direction of a contacting skin region, - a protective body of predetermined thickness having a placement surface, the placement surface being of a size to allow multiple autopods to be placed thereon simultaneously, - a sensor layer comprising light-sensitive sensor elements arranged in an array for detecting light of at least one predetermined wavelength range, wherein transmission regions are arranged between the sensor elements which are transparent for light of at least one predetermined illumination wavelength range, - a light guide made of a material transparent to light of the predetermined illumination wavelength range, which is designed in the form of a plane-parallel plate, having a lower large side and an upper large side arranged parallel thereto, which faces the sensor layer, as well as a plurality of narrow sides connecting the large sides (155, 156), one of the narrow sides being designed as a coupling-in surface for illumination light, and - a light source radiating illumination light along a longitudinal direction of the coupling surface, characterised in that - the light source is designed to emit light in a limited angular range about a preferred direction, the preferred direction including with the large sides (155, 156) an angle of incidence which is predetermined such that light emitted in the angular range, after entering the light guide, would be predominantly totally reflected at the large sides (155, 156) in the case of a medium having a refraction index of air adjacent thereto, - a mirror layer is arranged between the sensor layer and the light guide, which reflects a part of the illumination light back into the light guide and transmits another part of the illumination light, and in that - the device comprises means for homogenising the illumination intensity of illumination light which emerges from the light guide through the upper large side thereof and impinges on the support surface, and/or means for homogenising a quantity of light to be detected as a function of the illumination intensity of the illumination light impinging on the support surface from the protective body, in each case as a function of the distance from the light source, - wherein all layers are optically coupled by a direct connection or by an adhesive layer according to their stacking order. - a protective body of predetermined thickness having a placement surface, the placement surface being of a size to allow multiple autopods to be placed thereon simultaneously, - a sensor layer comprising light-sensitive sensor elements arranged in an array for detecting light of at least one predetermined wavelength range, wherein transmission regions are arranged between the sensor elements which are transparent for light of at least one predetermined illumination wavelength range, - a light guide made of a material transparent to light of the predetermined illumination wavelength range, which is designed in the form of a plane-parallel plate, having a lower large side and an upper large side arranged parallel thereto, which faces the sensor layer, as well as a plurality of narrow sides connecting the large sides (155, 156), one of the narrow sides being designed as a coupling-in surface for illumination light, and - a light source radiating illumination light along a longitudinal direction of the coupling surface, characterised in that - the light source is designed to emit light in a limited angular range about a preferred direction, the preferred direction including with the large sides (155, 156) an angle of incidence which is predetermined such that light emitted in the angular range, after entering the light guide, would be predominantly totally reflected at the large sides (155, 156) in the case of a medium having a refraction index of air adjacent thereto, - a mirror layer is arranged between the sensor layer and the light guide, which reflects a part of the illumination light back into the light guide and transmits another part of the illumination light, and in that - the device comprises means for homogenising the illumination intensity of illumination light which emerges from the light guide through the upper large side thereof and impinges on the support surface, and/or means for homogenising a quantity of light to be detected as a function of the illumination intensity of the illumination light impinging on the support surface from the protective body, in each case as a function of the distance from the light source, - wherein all layers are optically coupled by a direct connection or by an adhesive layer according to their stacking order.