A PASSIVE HOMODYNE FIBER VIBROMETER USING A 3-PHASE DETECTOR ARRAY

被引：4

作者：

JOHNSON, M ^{[1
]}

DELAPORTE, Y ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON, OPTOELECTR RES CTR, SOUTHAMPTON SO9 5NH, HANTS, ENGLAND

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 1993年 / 4卷 / 08期

关键词：

D O I：

10.1088/0957-0233/4/8/010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A non-contact, optical fibre-based vibrometer is described with output in the form of a set of spatial fringes. The fringe system is sampled at three different phases using a non-multiplexed linear detector array. No source frequency modulation is necessary, allowing convenient use of a wide variety of lasers, and surface motion is measured free from directional ambiguity. Fringe interpolation and multiple-fringe unwrapping are effected using a digital fringe processor. With a received power of 4 nW, a minimum noise-equivalent phase sensitivity of 150 muRad Hz-1/2 is demonstrated.

引用

页码：854 / 859

页数：6

共 4 条

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