Finger identification
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United States of America Patent
Stats
-
Oct 1, 1985
Issued Date -
N/A
app pub date -
Mar 7, 1983
filing date -
Nov 25, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A finger pressed against a platen or a fingerprint card provides a fingerprint object which is scanned by an interrogating beam of collimated light that is linearly displaced across the platen thereby maintaining a constant angle between the interrogating light beam and the plane of the object being scanned. As the beam scans across the fingerprint object, the reflected light beam is modulated. The modulated beam is imaged onto a linear array of photo-responsive devices to provide a series of output signals indicative of modulation information. The outputs of the devices are serially interrogated at each of successive scan positions to provide a set of signals containing fingerprint information.
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