Patent ID: 7567342

Claim:
An arrangement for optoelectronic image recording of prints of large-area concave skin parts, particularly whole handprints, comprising: an optical support body with a convex support surface for supporting the skin parts with large-area contact with the support surface in order to realize an image recording based on frustrated total internal reflection; a light source for illuminating the support surface; a readout beam path for transmitting totally internally reflected illumination light to an image sensor; said support body having the basic shape of a cylinder around a cylinder axis; said support body having a cylindrical outer surface with a radian measure and radius which are sufficient to provide at least one freely accessible portion of the outer surface as support surface for the large-area concave skin part; said support body having a first end face and a second end face, each having a conical recess which is arranged coaxially around the cylinder axis; said light source extending at least parallel to a surface line of the conical recess and being arranged in the conical recess of the first end face; said readout beam path including an imaging beam path which is connected to the conical recess of the second end face, which imaging beam path images a strip of the support surface that extends in a line-shaped manner along a lateral line of the outer surface of the support body on said image sensor, which is a linearly extending image sensor, at a total internal reflection angle in an axial plane given by the cylinder axis and the strip; and said linearly extending image sensor and the imaging beam path being rotatable synchronously around the cylinder axis of the support body in order to record successive line-shaped strips of the frustrated total reflection at the illuminated outer surface due to the skin parts contacting the support surface and to combine them to form a two-dimensional image of the skin part resting thereon.