| 摘要 |
PROBLEM TO BE SOLVED: To provide encoders operative in hostile environments.SOLUTION: Base structures 321 of a coding member 320 are arranged in a predetermined periodic manner and each base structure comprises first and second metal layers 321a, 321b. The base structures 321 are embedded in a body 322 made from an encapsulant such that a surface of the first metal layer 321a is exposed externally whereas the second metal layer 321b is completely embedded inside the body 322. Such encoders include transmissive optical encoders and reflective optical encoders, as well as non-optical encoders such as magnetic encoders and capacitive encoders. |
