Extended fingerprint reading apparatus
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Oct 23, 1995
filing date -
Oct 23, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is a miniature fingerprint reading device capable of extracting and accurately reproducing the ridge orientations on the skin of a fingertip. The illumination, focusing and reading elements follow the finger's curvature to provide a much larger surface area fingerprint comparable to conventional inking methods. The present invention virtually eliminates the occurrence of skewed images as there are restrictions to the angle at which any finger is read. Trapezoidal distortion is also eliminated as the fingerprint image is always at a fixed distance from the reading elements.
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