Contrast and sensitivity of the vibration fringes in time-averaged electronic speckle-pattern interferometry: effect of variations of force level

被引：9

作者：

Wong, WO

Chan, KT

Leung, TP

机构：

[1] Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon

来源：

OPTICS AND LASER TECHNOLOGY | 1997年 / 29卷 / 04期

关键词：

electronic speckle pattern interferometry; mode shape; vibration analysis;

D O I：

10.1016/S0030-3992(96)00070-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The time averaged frame subtraction technique is improved by subtracting two Bessel fringe patterns at two different force levels. The technique enables significant enhancement of fringe contrast and increased measurement sensitivity. The contrast and sensitivity of the fringes obtained at different force ratios are investigated, Both theoretical and experimental results are presented. (C) 1997 Elsevier Science Ltd.

引用

页码：179 / 185

页数：7

共 15 条

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