High contrast fingerprint image detector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 22, 1997
Issued Date -
N/A
app pub date -
Sep 8, 1995
filing date -
Jun 21, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a fingerprint input apparatus used to detect an image of a fingerprint, light is emitted towards a finger which is placed on an image detecting surface of a prism. An incident angle of light on the image detecting surface is less than a critical angle. An image sensor detects light which has been diffused by the fingerprint and directed towards the image sensor.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully