Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 1, 2008
Patent Application Number
10451406
Date Filed
November 29, 2001
Patent Citations Received
Patent Primary Examiner
Patent abstract
Device has a transparent body (1) with a support surface (2). Light is incident on the surface at an angle less than that required for total internal reflection. In the areas of the fingerprint ridges evanescent fields are excited. Propagated light (12-14) is reflected from the surface (2) and incident on a detector (22) at angles within the angular range for total internal reflection.
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