| 摘要 |
The detector comprises a rotary disk provided with a plurality of circular concentric reading tracks each having two alternated series of sectors of two different types. Said tracks are read out by appropriate sensors (1, 2, A, B, C, D). One of said tracks is associated with Z1 sensors (A, B, C, D) allowing to define Z1 relative decoding bits, the other track or tracks using Z2 sensors (1, 2) allowing to determine high-order bits of the angular position of the disk as well as the relative order of bits issued from Z1 sensors. The invention allows to make detectors of reduced size and high resolution. |
