Optical encoder with code wheel misalignment detection and...

Details Optical encoder with code wheel misalignment detection and... Optical encoder with code wheel misalignment detection and...

2011-07-12

2011-07-12

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S221000

Reexamination Certificate

active

07977623

ABSTRACT:
According to one embodiment, there is provided a device and method for correcting code wheel misalignment which employs upper and lower code wheel misalignment photodetectors positioned above and below at least first and second motion detection photodetectors. According to other embodiments, there are provided a device and method for automatically setting the gain of an output circuit in an optical encoder. Still further embodiments of optical encoders combine the code wheel misalignment and automatic gain control features of the invention.

REFERENCES:
patent: 4223261 (1980-09-01), White
patent: 4593194 (1986-06-01), Graham et al.
patent: 4649267 (1987-03-01), Ray
patent: 4998013 (1991-03-01), Epstein et al.
patent: 5260568 (1993-11-01), Ieki
patent: 5629550 (1997-05-01), Mita et al.
patent: 6154278 (2000-11-01), Ito et al.
patent: 6229140 (2001-05-01), Ishizuka
patent: 6345074 (2002-02-01), Turk et al.
patent: 6563108 (2003-05-01), Stevens et al.
patent: 6598196 (2003-07-01), Bussard et al.
patent: 6885457 (2005-04-01), Michel et al.
patent: 7244928 (2007-07-01), Ng et al.
patent: 7348544 (2008-03-01), Atsuta et al.
patent: 2004/0172208 (2004-09-01), Freitag et al.
patent: 2007/0138382 (2007-06-01), Matsuyama
Agilent Technologies, “Quick Assembly Two and Three Channel Optical Encoders”,Technical Data HEDM-550x/560x,HEDS-550x/554x,and HEDS-560x/564xMay 4, 2001.
OPTOLAB Microsystems, “Specifications ASI”, www.optolab.com Dec. 18, 2002.

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