Vibration analysis by holography
Vibration analysis by holography
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全息振动分析
DOI：
10.1088/0034-4885/33/2/302
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发表时间：
1970
影响因子：
18.1
通讯作者：
P. Fryer
中科院分区：
文献类型：
--
作者：
P. Fryer
这篇文章涵盖了对振动分析领域的实际工作者有用的全息术的各个方面。在介绍之后，本章分为四个主要部分，第一部分(§2)介绍了全息术的基本理论和实践。描述了几种可能有助于解决特定问题的想法，例如长物体的照明，简要介绍了全息记录介质，并以最大限度地利用可用相干光的一些技术结束了这一部分。第二个主要部分(§3)专门讨论频闪全息技术--它的理论和实践--描述了基本技术的变化，并详细讨论了“实时”和“冻结条纹”技术的优点。第四节以类似的细节介绍了时间平均全息术，并特别注意了对基本技术的许多修改中的一些，这些修改是为了克服它的一些缺点而设计的。这一部分总结了时间平均全息术方法在研究平板振动中的典型应用。最后一节(§5)介绍了一种或两种改变频闪和时间平均方法的条纹灵敏度的技术，并描述了几种相关的振动分析方法，它们在某些实验情况下可能比全息系统更有优势。
This article covers aspects of holography useful to practical workers in the field of vibrational analysis. After an introduction, it is divided into four main sections, the first of which (§ 2) deals with the basic theory and practice of holography. Several ideas which may help to solve particular problems, such as the illumination of long objects, are described, holographic recording media are briefly covered, and the section is concluded with a description of some techniques for the maximum utilization of the available coherent light. The second main section (§ 3) deals exclusively with the technique of stroboscopic holography - its theory and practice - and variations in the basic technique are described with the advantages of `live' and `frozen fringe' techniques being discussed in detail. Section 4 covers time-averaged holography in similar detail, with particular attention being given to some of the many modifications to the basic technique which have been devised to overcome some of its disadvantages. The section concludes with a typical utilization of the method of time-averaged holography applied to the study of plate vibrations. The final section (§ 5) covers one or two techniques for altering the fringe sensitivity of the stroboscopic and time-averaged methods and also describes several related methods of vibrational analysis which may have advantages over the holographic system in some experimental situations.