Absolute angle detecting device

Details Absolute angle detecting device Absolute angle detecting device

2005-11-22

2005-11-22

Bennett, G. Bradley (Department: 2859)

Geometrical instruments

Miscellaneous

Light direction

C341S003000

Reexamination Certificate

active

06966118

ABSTRACT:
The present invention provides an absolute angle detecting device capable of achieving a resolution of 1.5 degrees or less by which 360 degrees can be divided without a remainder, using two code pattern rows and eight detecting elements. The absolute angle detecting device comprises a rotary disk1; a first code pattern row2and a second code pattern row3, each provided on the circumference whose center is the center of rotation O of the rotary disk1; a first detecting element group10consisting of five detecting elements4to8that are arranged at equal intervals opposite to the first code pattern row2; and a second detecting element group14consisting of three detecting elements11to13that are arranged at equal intervals opposite to the second code pattern row3. Both a gray code obtained by combining five codes supplied from the first detecting element group10and a gray code obtained by combining three codes supplied from the second detecting element group14are cyclic codes.

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patent: 2000-028396 (2000-01-01), None

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