Optical vernier protractor, its measuring range and precision design method |
Title： |
| Optical vernier protractor, its measuring range and precision design method |
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Application Number： |
200410030788 |
Application Date： |
2004/04/09 |
Announcement Date： |
2005/01/12 |
Pub. Date： |
2006/08/02 |
Publication Number： |
1563887 |
Announcement Number： |
1267697 |
Grant Date： |
2006-8-2 |
Granted Pub. Date： |
2006-8-2 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G01B 11/26 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Chen Feifan, Hong Zhiwei |
Key Words： |
Optical vernier protractor, measuring range, precision design method |
Abstract： |
The invention belongs to technical area of designing photoelectric sensor. The device contains upper mask plate as optical vernier moving ruler and lower mask plate as optical vernier static ruler. Relative position between the said rulers is fixed and parallel to each other. A piece of lightproof wide dark stripe representing measurement zero point is in center on upper mask plate. Symmetrical periodic dark and light interlaced stripes are distributed on two sides of the said zero point dark stripe. Symmetrical periodic dark and light interlaced stripes are also distributed on lower mask plate, but their periods are different between stripe on upper mask plate and lower mask plate. A piece of optoelectronic converter is setup under the lower mask plate. The invention also discloses method for designing measuring range and precision. |
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 Relevancy information |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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