Apparatus for imaging fingerprint using transparent optical means having elastic material layer
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United States of America Patent
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-
Mar 17, 1992
Issued Date -
N/A
app pub date -
Aug 27, 1990
filing date -
Aug 21, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to obtain a clear surface pattern of an object such as a fingerprint impression and the like, a surface of an optical element against which the object is impressed is made of an elastic and/or viscous material. Thus, a surface pattern with high contrast is available even if the surface to be imaged is dry.
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