Optical navigation system having a filter-window to seal an enclosure thereof
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United States of America Patent
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Oct 15, 2013
Grant Date -
Oct 13, 2011
app pub date -
Mar 23, 2011
filing date -
Dec 16, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical navigation system and method are provided. In one embodiment, the system includes: (i) a coherent light source to emit light to illuminate a portion of a finger; and (ii) a detector to receive light reflected from the portion of the finger, the detector including a speckle-based sensor configured to sense movement of the finger relative to the detector based on changes in a complex interference pattern created by the light reflected from the portion of the finger. Other embodiments are also described.
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