US Patent 6872931 Optical input device for measuring finger movement
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Patent abstract
An optical input device for measuring the movement of a finger (15) ia accommodated in a housing provided with a transparent window (12) for transmitting a measurement beam (13) from a diode laser (3) to the finger and radiation reflected by the finger to a detector (4). This feature prevents that grease and dust disturb and block the measuring beam.
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Patent Inventor Names
Aldegonda Lucia Weijers0
Christoph Dobrusskin0
Martin Dieter Liess0
Date of Patent
March 29, 2005
0Patent Application Number
101694610
Date Filed
November 6, 2001
0Patent Primary Examiner
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US Patent 6872931 Optical input device for measuring finger movement
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