QUANTITATIVE MEASUREMENT OF THE VIBRATIONAL AMPLITUDE AND PHASE IN PHOTOREFRACTIVE TIME-AVERAGE INTERFEROMETRY - A COMPARISON WITH ELECTRONIC SPECKLE PATTERN INTERFEROMETRY

被引：7
|
作者：
ROHLEDER, H
PETERSEN, PM
MARRAKCHI, A
机构：
[1] OPT & FLUID DYNAM DEPT,DK-4000 ROSKILDE,DENMARK
[2] SIEMENS CORP RES,PRINCETON,NJ 08540
来源：
JOURNAL OF APPLIED PHYSICS | 1994年 / 76卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.357063
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Time-average interferometry is dealt with using four-wave mixing in photorefractive Bi12SiO20. By introducing a proper sinusoidal phase shift in the forward pump beam it is possible to measure the amplitude and phase everywhere on a vibrating object. Quantitative measurements of the phase and amplitude of the vibrating structure are demonstrated in photorefractive time average interferometry. The photorefractive interferometer is compared with the performance of a commercial electronic speckle pattern interferometer (ESPI). It is shown that the dynamic photorefractive holographic interferometer improves the image quality considerably and is able to extend the measurable range for the acoustic vibration amplitude and frequency compared to what is obtainable with the ESPI equipment.
引用
收藏
页码：81 / 84
页数：4
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