G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 9/20 (2006.01) G01N 29/00 (2006.01) G01S 7/52 (2006.01) G01S 15/89 (2006.01) G06K 9/00 (2006.01) G10K 11/35 (2006.01) G01S 15/88 (2006.01)
Patent
CA 2094241
An ultrasonic system and method for imaging a surface wherein a C-mode ultrasonic scan is performed over a fixed area of the surface and range gating is applied to that area to a given depth below the surface. For use of the system and method in fingerprint imaging, a live finger is placed upon a sensitive surface, the portion of the finger on the surface is scanned using the ultrasonic energy, and ultrasonic energy returned from the finger portion is received to capture an electronic image of the pattern of ridges and valleys of the fingerprint. The ultrasonic imaging system comprises a probe (102) for providing a directed output ultrasonic beam to scan the surface and to receive ultrasonic echos from the surface, a pulser-receiver (104), a signal processing circuit (108). The probe scans the surface along one direction, and then along another direction, the two directions preferably be- ing orthogonal.
Glenn William E.
Schneider John K.
Macrae & Co.
Niagara Technology Incorporated
Ultra-Scan Corporation
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