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US5159192A Encoder and scanning system using a scale having a non-uniform pitch 失效
使用具有不均匀间距的刻度的编码器和扫描系统

Encoder and scanning system using a scale having a non-uniform pitch
摘要:
A rotary encoder and a scanning system using the same for detecting rotation of a galvano scanner which comprises a rotary scale coupled to a rotating driver, a scale with slits formed at a non-uniform pitch circumferentially on the rotary scale within a limited rotation angle and detection means for detecting a rotation status by reading the slits.
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