发明名称 |
Absolute position encoder obtains signals corresponding to individual imaging ranges of imaging optical systems |
摘要 |
In an absolute position detection type photoelectric encoder devised so as to detect a pseudorandom pattern disposed on a main scale by means of a plurality of imaging optical systems, assembling of the absolute position detection type photoelectric encoder is facilitated and production cost thereof is reduced by providing: a single light-receiving array element disposed on the imaging surfaces of the imaging optical systems, which incorporates a greater light-receiving array portion in the length measurement direction than the light-receiving range of the respective imaging optical systems; a window signal storing portion for storing a window signal showing a light-receiving range of the respective imaging optical systems; and a window signal comparison portion for obtaining signals corresponding to individual imaging ranges by comparing scanning signals of the light-receiving array element with window signals.
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申请公布号 |
US8039786(B2) |
申请公布日期 |
2011.10.18 |
申请号 |
US20090385999 |
申请日期 |
2009.04.27 |
申请人 |
MITUTOYO CORPORATION |
发明人 |
KUSANO KOUHEI;MORIMOTO KOUJI |
分类号 |
G01D5/34;H01L27/00;H03M1/22 |
主分类号 |
G01D5/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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