发明名称 |
Interferometric signal conditioner for measurement of the absolute length of gaps in a fiber optic Fabry-Perot interferometer |
摘要 |
A method and apparatus for quantitatively measuring the distance of an unknown variable gap is disclosed. Light is provided to two Fabry-Perot interferometers arranged in a series, one spanning the unknown gap and the other spanning a controllably variable gap. Means for verifying the positioning of the Fabry-Perot interferometer having the controllably variable gap work in conjunction with a signal processor, a correlation burst signal detector and means for conveying the light to the various system elements to perform a comparison of detector signals from the two interferometers and quantitatively establish the gap distance. The invention may also be varied to function on a time basis, include more than one source of light, possess filter means to distinguish between light sources and/or include one or more reference interferometers.
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申请公布号 |
US7355684(B2) |
申请公布日期 |
2008.04.08 |
申请号 |
US20050106750 |
申请日期 |
2005.04.15 |
申请人 |
DAVIDSON INSTRUMENTS, INC. |
发明人 |
JEFFERS LARRY A.;BERTHOLD JOHN W.;LOPUSHANSKY RICHARD L. |
分类号 |
G01L1/24;G01B9/02;G01D5/26;G02B26/00 |
主分类号 |
G01L1/24 |
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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