Ultrasonic fingerprint scanning utilizing a plane wave
AssigneeUltra-Scan Corporation
InventorsJohn K. Schneider, Jack C. Kitchens, James T. Baker
Life of this patent
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Abstract
The invention may be embodied as a fingerprint scanner having an ultrasonic wave detector, a platen, an ultrasonic wave generator located between the detector and the platen. The invention may be embodied as a method of scanning a finger. One such method includes providing a platen, a detector and a generator, the generator being placed between the platen and the detector. A finger may be provided on the platen, and an ultrasound wave pulse may be sent from the generator toward the finger. The wave pulse may be reflected from the finger, and received at the detector. The received wave pulse may be used to produce an image of the finger.
Claims74
A fingerprint scanner, comprising:
- an ultrasonic wave detector;
- a platen;
- and
- an ultrasonic wave generator located between the detector and the platen, wherein the generator has a length-to-width ratio greater than 50.
A method of scanning a finger, comprising:
- providing a platen;
- providing a detector;
- providing a generator between the platen and the detector, wherein the generator has a length-to-width ratio greater than 50;
- providing a finger on the platen;
- sending an ultrasound wave pulse from the generator toward the finger;
- receiving a reflected ultrasound wave pulse from the finger;
- and
- using the received reflected ultrasound wave pulse to produce an image of the finger.
A fingerprint scanner, comprising:
- an ultrasonic wave detector, wherein the detector is arranged as a line array;
- a platen;
- and
- an ultrasonic wave generator located between the detector and the platen.
A method of scanning a finger, comprising:
- providing a platen;
- providing a detector, wherein the detector is arranged as a line array;
- providing a generator between the platen and the detector;
- providing a finger on the platen;
- sending an ultrasound wave pulse from the generator toward the finger;
- receiving a reflected ultrasound wave pulse from the finger;
- and
- using the received reflected ultrasound wave pulse to produce an image of the finger.
Dependencies are inferred from the claim text.