| 摘要 |
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 disk 1; a first code pattern row 2 and a second code pattern row 3, each provided on the circumference whose center is the center of rotation O of the rotary disk 1; a first detecting element group 10 consisting of five detecting elements 4 to 8 that are arranged at equal intervals opposite to the first code pattern row 2; and a second detecting element group 14 consisting of three detecting elements 11 to 13 that are arranged at equal intervals opposite to the second code pattern row 3. Both a gray code obtained by combining five codes supplied from the first detecting element group 10 and a gray code obtained by combining three codes supplied from the second detecting element group 14 are cyclic codes.
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