发明授权
- 专利标题: Encoder that optically detects positional information of a moving body from different optical paths lengths
- 专利标题(中): 从不同的光路长度光学地检测移动体的位置信息的编码器
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申请号: US13090659申请日: 2011-04-20
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公开(公告)号: US08710425B2公开(公告)日: 2014-04-29
- 发明人: Susumu Makinouchi , Akihiro Watanabe
- 申请人: Susumu Makinouchi , Akihiro Watanabe
- 申请人地址: JP Tokyo
- 专利权人: Nikon Corporation
- 当前专利权人: Nikon Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Oliff PLC
- 优先权: JP2008-273166 20081023
- 主分类号: G01D5/34
- IPC分类号: G01D5/34
摘要:
An encoder emits modulated light from a light source section and lets a first light and a second light separated from the modulated light interfere with each other in a moving grating. In the encoder, the light emitted from the light source section is electrically modulated, and the first light and the second light have different light path lengths.
公开/授权文献
- US20110192964A1 ENCODER 公开/授权日:2011-08-11
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