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Optical encoder and method for measuring displacement information using multiple optical tracks of diffractive optical regions having different periodicities
Optical encoder and method for measuring displacement information using multiple optical tracks of diffractive optical regions having different periodicities
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机译:光学编码器和使用具有不同周期性的衍射光学区域的多个光学轨道来测量位移信息的方法
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摘要
An optical encoder and method for measuring displacement information uses an encoder member that includes multiple optical tracks of diffractive optical regions having different periodicities with respect to consecutive identical diffractive optical regions to produce diffracted beams of light from at least one beam of light emitted from a light source. The diffracted beams of light are received at photodetectors, which produce electrical signals in response to the received beams of light. The electrical signals are related to the displacement information being measured.
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