发明授权
US08710425B2 Encoder that optically detects positional information of a moving body from different optical paths lengths 有权
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

  • 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
  • 申请号: US13090659
    申请日: 2011-04-20
  • 公开(公告)号: US08710425B2
    公开(公告)日: 2014-04-29
  • 发明人: Susumu MakinouchiAkihiro Watanabe
  • 申请人: Susumu MakinouchiAkihiro 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
Encoder that optically detects positional information of a moving body from different optical paths lengths
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
信息查询
0/0