| 摘要 |
PROBLEM TO BE SOLVED: To provide a spacer that assists the arrangement of a scale and an encoder head at the optimum interval and can be adjusted optically as it is. SOLUTION: This spacer 100 has a thickness D that gives the optimum interval between the scale 20 and encoder head 10 and is arranged between the scale 20 and head 10 when an optical encoder is assembled. The spacer 100 also has a transmittance that is suitable for optical adjustment, such as the margin confirmation etc., performed to the optical encoder. Therefore, the optical adjustment can be performed while the spacer 100 is arranged between the encoder head 10 and scale 20. COPYRIGHT: (C)2004,JPO
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