Absolute angle detecting device

Details Absolute angle detecting device Absolute angle detecting device

2007-04-03

2007-04-03

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231140, C250S231130, C356S616000, C356S617000

Reexamination Certificate

active

11230229

ABSTRACT:
First and second signal detecting element groups are respectively arranged to face first and second signal detecting tracks that are provided on a first code wheel. In addition, third and fourth signal detecting element groups are respectively arranged to face third and fourth signal detecting tracks that are provided on a second code wheel. A code string is output from the first and second signal detecting element groups to obtain a circular gray-code for detecting the rotation of the first code wheel within one revolution. Further, a code string is output from the third and fourth signal detecting element groups to obtain a circular gray-code for detecting the rotation of the first code wheel over one revolution.

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