发明名称 |
Determination of displacement |
摘要 |
Disclosed is an optical measurement scale 14 complementary scale reader 10 for determining displacement between the scale and reader. The scale 14 and reader 10 are adapted for use with a liquid C which provides optical communication between the scale 14 and the reader 10. The liquid C is preferably machine coolant or oil. The scale is preferably a stainless steel strip having periodic markings thereon. The scale reader has a window 16 which may have a hard coating (30 FIG. 4) thereon, e.g. diamond-like carbon, to prevent surface damage. The scale and reader may be mutually displaced with a shortage of liquid without undue adverse affects. Rotary mutual displacement between the scale and reader is discussed.
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申请公布号 |
US6839980(B2) |
申请公布日期 |
2005.01.11 |
申请号 |
US20030380516 |
申请日期 |
2003.03.14 |
申请人 |
RENISHAW PLC |
发明人 |
HENSHAW JAMES REYNOLDS;HOODLESS RICHARD JOHN |
分类号 |
G01D5/30;G01D5/347;G01D5/38;(IPC1-7):G01B21/16 |
主分类号 |
G01D5/30 |
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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