Optical imaging device
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United States of America Patent
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-
Jul 6, 1999
Grant Date -
N/A
app pub date -
Dec 9, 1997
filing date -
Dec 9, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical imaging device such as a fingerprint imager has a platen formed of a plurality of parallel prisms and a light source for illuminating a portion of the platen. An optical sensor is disposed so as to receive light from the light source reflected off a surface of the platen and directed toward the optical sensor. The platen is mounted moveable relative to the sensor so as to allow scanning of a fingertip in contact with the platen during relative motion of the platen and the sensor. Preferably, the platen is formed of a microprism structure.
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