FULL ROLL FINGERPRINT APPARATUS
As a live finger (F) is rolled across a glass platen (26) in an optical scan fingerprint apparatus, a series of lights (25) turn on and off to demarcate the line along the platen (26) at which the optical scan is being taken. In this fashion, the finger (F) applied to the platen (26) can be rotated across the platen (26) at a rate that keeps sufficient track with the scan to provide a complete (nail-to-nail) full roll scan.