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US07566863B2 Optical encoder with diffractive encoder member 失效
具有衍射编码器构件的光学编码器

Optical encoder with diffractive encoder member
摘要:
An optical encoder uses an encoder member with a digital diffractive track to optically manipulate an incident beam of light into manipulated beams of light, which are detected as spots of light that represent a digital absolute position value of the encoder member.
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