发明名称 |
Fiber optic Fabry-Perot sensor for measuring absolute strain |
摘要 |
Absolute strain is measured by providing a coherent beam of light and separating the coherent beam of light into first and second beams which are in quadrature with one another and which have different polarization angles. The first and second beams are combined in a manner which maintains the different polarization angles thereof, so as to form a combined beam. The combined beam is then applied to a Fabry-Perot strain sensor so as to form a reflected combined beam. The reflected combined beam is then separated into first and second reflected beams having different polarization angles. The intensity of the first and second reflected beams is then sensed, so as to determine a change in the etalon length of the Fabry-Perot sensor. The change in etalon length is indicative of the absolute strain sensed.
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申请公布号 |
US6173091(B1) |
申请公布日期 |
2001.01.09 |
申请号 |
US20000482446 |
申请日期 |
2000.01.11 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
REICH STANLEY M. |
分类号 |
G01B11/16;G01L1/24;(IPC1-7):G01L1/24 |
主分类号 |
G01B11/16 |
代理机构 |
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