Optical fingerprint imaging device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 15, 1990
Grant Date -
N/A
app pub date -
Aug 2, 1988
filing date -
Aug 2, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus suitable for imaging fingerprints directly from a finger in contact with a transparent surface of a lens is described. The conical nature of the contact surface affords the opportunity for a single such surface to accommodate a wide range of finger sizes. The front surface of the lens is conical, and a light source is provided for illuminating the finger, with ridges of the fingerprint being imaged and light illuminating the papillary valleys being refracted away from the imaging means.
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Family
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