Optical input device for measuring finger movement

Details Optical input device for measuring finger movement Optical input device for measuring finger movement

2005-03-29

2005-03-29

Lee, John R. (Department: 2881)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C435S156000, C435S157000, C435S160000, C435S167000, C435S168000

Reexamination Certificate

active

06872931

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.

REFERENCES:
patent: 5803729 (1998-09-01), Tsimerman
patent: 6099541 (2000-08-01), Klopotek
patent: 6168814 (2001-01-01), Long
patent: 6275634 (2001-08-01), Potucek
patent: 6391400 (2002-05-01), Russell et al.
patent: 6552713 (2003-04-01), Van Brocklin et al.

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