Quantitative Interpretation of Multi-Directional Holographic Interferometry PDF Download
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Author: Charles M. Vest
Publisher:
ISBN:
Category :
Languages : en
Pages : 135
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Book Description
This final technical report on quantitative interpretation of multidirectional holographic interferometry contains summaries of a number of specific investigations conducted in the Department of Mechanical Engineering, The University of Michigan. The primary objective of this research is the minimization of data required to obtain complete three-dimensional density information from wind tunnel holographic interferometry tests on arbitrary models. The investigations described herein are: (1) The theory of reconstruction of functions from their projections was reviewed and evaluated in the context of application to holographic interferometric data of the type used for wind tunnel diagnostics; (2) Using computer-simulated experimental data, several algorithms for data analysis were compared; (3) A study of direct three-dimensional reconstruction of density fields, as opposed to reconstruction of the fields on a set of cross-sectional planes, was conducted; (4) The use of a priori knowledge of the physical structure of the field being measured was considered; (5) The problems associated with refraction of probing optical rays were studied; (6) Experimental work of limited scope was carried out. A study of illumination schemes for multi-directional holographic interferometers resulted in the design of a holographic phase grating for generating several plane waves of high optical quality, each propagating in a different direction.
Author: Charles M. Vest
Publisher:
ISBN:
Category :
Languages : en
Pages : 135
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Book Description
This final technical report on quantitative interpretation of multidirectional holographic interferometry contains summaries of a number of specific investigations conducted in the Department of Mechanical Engineering, The University of Michigan. The primary objective of this research is the minimization of data required to obtain complete three-dimensional density information from wind tunnel holographic interferometry tests on arbitrary models. The investigations described herein are: (1) The theory of reconstruction of functions from their projections was reviewed and evaluated in the context of application to holographic interferometric data of the type used for wind tunnel diagnostics; (2) Using computer-simulated experimental data, several algorithms for data analysis were compared; (3) A study of direct three-dimensional reconstruction of density fields, as opposed to reconstruction of the fields on a set of cross-sectional planes, was conducted; (4) The use of a priori knowledge of the physical structure of the field being measured was considered; (5) The problems associated with refraction of probing optical rays were studied; (6) Experimental work of limited scope was carried out. A study of illumination schemes for multi-directional holographic interferometers resulted in the design of a holographic phase grating for generating several plane waves of high optical quality, each propagating in a different direction.
Author: Pramod K. Rastogi
Publisher: Springer
ISBN: 3540480781
Category : Science
Languages : en
Pages : 343
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Book Description
Holographic Interferometry provides a valuable and up-to-date source of information in the rapidly expanding field. The eight specialists` contributions cover the principles and methods currently in use. The scope of the book has been limited to the study of opaque object and ample space has been devoted to a comprehensive treatment of the phenomena of fringe formation, with a particular emphasis on the quantitative evaluation of the holographic interference fringe patterns. The emergence of computer-aided fringe analysis and phase-shifting techniques have simplified considerably the quantative real-time measurements of object shapes and deformations. The last two chapters provide a reasonably detailedoverview of full-field holographic methods for the measurement of shapes, displacements, dervatives, difference displacements and vibrations.
Author: Tse-Fou Zien
Publisher:
ISBN:
Category : Holographic interferometry
Languages : en
Pages : 120
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Book Description
Holographic interferometry was successfully applied to a large-scale wind tunel (40-cm x 40-cm test section) experiment on a three-dimensional flow field. The laser interferometer was set up in a schlieren bench with a pulsed-ruby laser as the light source. Both the object beam and the reference beam were collimated. The conventional double-exposure, off-axis operation was used to produce interferograms...
Author: Steve Carl Jamieson Parker
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Thomas Kreis
Publisher: John Wiley & Sons
ISBN: 3527604928
Category : Science
Languages : en
Pages : 554
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Book Description
The book presents the principles and methods of holographic interferometry - a coherent-optical measurement technique for deformation and stress analysis, for the determination of refractive-index distributions, or applied to non-destructive testing. Emphasis of the book is on the quantitative computer-aided evaluation of the holographic interferograms. Based upon wave-optics the evaluation methods, their implementation in computer-algorithms, and their applications in engineering are described.
Author: Charles M. Vest
Publisher: Wiley-Interscience
ISBN:
Category : Photography
Languages : en
Pages : 496
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Book Description
A unified, comprehensive, self-contained treatment of theory, practice, and application, including related coherent optical techniques. Emphasizes quantitative evaluation of holographic interferograms of both opaque and transparent objects, explaining how tools such as the laser and holography are being applied to present-day measurement problems. Applies clear, simple, physical reasoning to present practical information and data; circumvents complicated mathematics wherever possible. Includes over 700 cited references, numerous line drawings and photographs, and several useful tables and equations relating optical data to physical properties.
Author: Y.I. Ostrovsky
Publisher: Springer
ISBN: 3540390081
Category : Science
Languages : en
Pages : 341
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Book Description
This book is an introduction to holographic interferometry - a field of holography having a great number of important and practically useful ap pl ications. It is intended for special ists working in the field of optics and holography, and also for students of the relevant specialities. At present, a gr eater and greater number of mechanica 1 engi neers, tur bine designers, testers of diverse equipment, biologists, crystallographers, and so on have to do with holographic interferometry. To allow these spe cialists, who are comparatively far from optics, to master the subject too, the main content of the book is preceded by an introductory chapter treating the fundamental concepts of the interference of light, optical interferometry, holography and holographic interferometry. The following chapters deal with the fundamentals of the theory of ho lographic interferometry and of experimental equipment. The authors have set themselves the task of sharing their more than ten year of experience of work in the field of holographic interferometry with their readers. In this connection, the questions which they dealt with directly are con sidered in somewhat greater detail, as a rule, than those with which they have become acquainted only from publications on the subject. A sufficiently detailed (although far from complete) bibliography gives any interested reader an opportunity to improve his knowledge of this field.
Author: Valeriĭ Pavlovich Shchepinov
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 512
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Book Description
In this unique book, Shchepinov and his colleagues introduce and discuss the development and application of the increasingly important technique; holographic and speckle interferometry employed in the investigation of structure and material deformation and fracture processes. The authors consider the main physical and metrological aspects of interferometry from the deformation analysis viewpoint, emphasizing the need for (and the difficulties in obtaining) high quality and accurate fringe patterns. The advantages and outstanding features of the techniques are discussed in the second part of the book and these are compared with conventional methods of experimental mechanics. The book is illustrated with numerous unique interferograms to demonstrate the various fringe patterns which must be quantitively interpreted to obtain strain and stress values with the required accuracy. All fringe patterns presented are primary sources of the corresponding displacement and strain distributions contained in the book. The results illustrate how holographic and speckle interferometry can be used for development in various scientific and applied subjects in the fields of solid and fracture mechanics. Written specifically for researchers and engineers specializing in the strength of structures and materials, this book will also serve to introduce students to the fundamentals of holographic and speckle interferometry and the way these methods can be applied in experimental mechanics.
Author: Yuri I. Ostrovsky
Publisher: Springer
ISBN: 3540470689
Category : Science
Languages : en
Pages : 257
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Book Description
This monograph deals with diverse applications of holographic interferome try in experimental solid mechanics. Holographic interferometry has experienced a development of twenty years. It has enjoyed success and suffered some disappointments mainly due to early overestimation of its potential. At present, development of holo graphic interferometry is progressing primarily as a technique for quantita tive measurements. This is what motivated us to write this book - to ana lyze the quantitative methods of holographic interferometry. The fringe patterns obtained in holographic interferometry are graphi cally descriptive. In the general case, however, because they contain infor mation on the total vectors of displacement for points on the surface of a stressed body, the interpretation of these interferograms is much more complicated than in typical conventional interferometry. In addition, the high sensitivity of the method imposes new requirements on the loading of the objects under study. New approaches to designing loading fixtures are needed in many cases to ensure the desired loading conditions. The wealth of information obtained in holographic interferometry necessitates the use of modern computational mathematics. Therefore, practical implementation of the various methods of holographic interferometry must overcome sub stantial difficulties requiring adequate knowledge in diverse areas of science such as coherent optics, laser technology, mechanics, and applied mathe matics. Experimental methods play a significant role in solid mechanics.
