Fingerprint input apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 8, 2002
Issued Date -
N/A
app pub date -
Sep 5, 2000
filing date -
Dec 6, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fingerprint input apparatus includes a prism, a light source, a pinhole, and an imaging plane. The prism is placed such that a surface in one direction serves as a fingerprint collection surface. The light source irradiates light on the fingerprint collection surface through the prism. The pinhole is set in the path of light which is reflected by the pattern surface of a finger placed on the fingerprint collection surface and emerges from the prism. The light emerging from the prism and passing through the pinhole is formed into an image on the imaging plane. When the prism is substituted by air, an optical fingerprint collection surface equivalent to the fingerprint collection surface is set to be substantially parallel to the imaging plane.
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Patent Citation Ranking
- 13 Citation Count
- G06K Class
- 23.67 % this patent is cited more than
- 23 Age