An apparatus for capturing fingerprint images having a platen sized for at most two fingers of a hand, and an imaging system for enabling capture of fingerprint images presented to the platen, in which images of two different finger pairs are captured for each hand of a subject when presented to the platen. A first Interim Connection Space for spectral data in a full spectral space is accessed. An evaluation device for electromagnetic radiation which is reflected at least off of the solid is connected to a detector. Each V-shaped groove section aims vertex-forward and includes a pair of straight groove segments defining an interior angle in the approximate range between 60 and 120.