Method and apparatus for producing a directly viewable image of a fingerprint
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United States of America Patent
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-
Apr 8, 1997
Issued Date -
N/A
app pub date -
May 3, 1995
filing date -
Dec 20, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A directly viewable fingerprint image is formed by illuminating a transparent planar substrate from one surface with collimated light, the substrate having pressed against the other surface a fingerprint to be imaged. Light striking the surface against which ridges of the fingerprint are in contact undergoes internal reflection within the substrate and causes a directly viewable image of the fingerprint to be formed by a direct image producing means.
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Family
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