Last edited by Bragal
Wednesday, November 11, 2020 | History

2 edition of Digital shearography found in the catalog.

Digital shearography

Wolfgang Steinchen

Digital shearography

theory and application of digital Speckle pattern shearing interferometry

by Wolfgang Steinchen

  • 337 Want to read
  • 6 Currently reading

Published by SPIE Press in Bellingham, Wash .
Written in English

    Subjects:
  • Holographic interferometry.,
  • Speckle.,
  • Nondestructive testing

  • Edition Notes

    Includes bibliographical references and index.

    Statementby Wolfgang Steinchen, Lianxiang Yang.
    ContributionsYang, Lianxiang.
    Classifications
    LC ClassificationsTA1555 .S74 2003
    The Physical Object
    Paginationxvii, 310 p. :
    Number of Pages310
    ID Numbers
    Open LibraryOL19493472M
    ISBN 100819441104


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Digital shearography by Wolfgang Steinchen Download PDF EPUB FB2

This book describes the development of second-generation digital shearography, which is especially Digital shearography book in nondestructive testing, strain measurement, and vibration analysis due to its relative insensitivity to environmental disturbances.

Contents - Introduction and approach to problem - Shearographic metrology - Simple digital shearography. That book has greatly contributed to enabling better understanding and improvement of the digital shearography Digital shearography book.

During the past 13 years, digital shearography has been widely applied by industry and accepted as a practical tool for nondestructive testing; at the same time, the technique itself has been greatly by: Shearography is an optical interferometric technique that is finding increasing application for composite inspection [32,33].

Figure shows a schematic of the shearography process. Coherent laser light is scattered from the test surface and passed through a shearing optic that splits the scene into two identical but displaced images before the image is focused on the detector.

This book describes the development of second-generation digital shearography, which is especially effective in nondestructive testing, strain measurement, and vibration analysis due to its relative insensitivity to environmental disturbances. Shearography or Speckle pattern shearing interferometry is a measuring and testing Digital shearography book similar to holographic uses coherent light or coherent soundwaves to provide information about the quality of different materials in nondestructive testing, strain measurement, and vibration analysis.

Shearography is extensively used in production and development in aerospace, wind rotor. It has been more than a decade since SPIE Press Digital shearography book the first book on shearography in Digital Shearography: Theory and Application of Digital Speckle Pattern Shearing Interferometry by Wolfgang Steinchen and Lianxiang book has greatly contributed to enabling better understanding and improvement of the digital shearography technique.

With digital shearography, the flaws are revealed in one second, whilst the ultrasonic technique requires point-by-point scanning along the test surface and, at the same time, proper fluid coupling between the transducer and the test surface must be ensured (Choi et al., ).

Note that the ultrasound image is of low quality, as the result was. Shearography, also called speckle pattern shearing interferometry, is a measurement technique based on laser speckle pattern interferometry.

It measures the gradient of the deformation. In order to provide a better understanding of the digital shearography technique, this chapter gives a brief review of basic optics principles by reviewing the.

This book is, however, not intended as a commemoration, rather as an occasion to review the trends and undercurrents that are driving the field of optical metrology, with emphasis on nondestructive testing.

Digital Shearography and Applications (Y.Y. Hung). Principles of digital shearography. Applications. Limitations and remedies. Measurement Principles of Digital Shearography: Digital shearography is a laser measuring technique based on digital data processing, phase-shifting techniques and interferometry.

According to the common sense of interferometry, two beams with an identical wavelength are required for a. The book presents recent developments of phase shift-digital shearography and its applicatis with focus on spatial phase shift-digital shearography, pages and more than figures.

Nondestructive Evaluation (NDE) of Composites: Digital Shearography - (a book chapter with 32 pages: pp. 84 - ). 10+ Free eBooks for Digital Photography. Stephanie Kay-Kok. Because most photography gear is so expensive, it’s a relief when you can get nice stuff for free.

One nice thing you can always get for free is knowledge. While you can certainly pay for a memorable photography workshop, there are plenty of tips and resources online. Digital shearography, a laser interferometric technique in conjunction with the digital image processing, has the potential for vibration analysis due to its simple optical system and sensitivity against small rigid body motions.

This paper will focus on its recent developments for vibration analysis and for nondestructive testing (NDT) by dynamic (harmonic) excitation. Book April Digital shearography can directly measure strain with high sensitivity when combined with different optical setups, phase-shift techniques, and algorithms.

Its simple setup. For exploring these motivations, it is important to develop didactic tools to understand the potential of digital shearography through training and didactic courses in the field of NDT. In this paper we describe a simple tool for making one familiar with the. Abstract.

Digital Shearography is an optical non-contacting non- destructive testing technique. The inspection method has found many applications and is particularly suited for amongst others, in-situ inspection of composite components for defects such as low velocity impact damage and delaminations.

Three versions of shearography are in existence which are based on different recording media: photographic[1]; thermoplastic[2]; and digital[3]. Recently, a unified approach for practising holography and shearography was reported[4]. In this paper, only the digital version of shearography is presented.

Book: Lian X. Yang and Xin Xie, “Digital Shearography: New Developments and Applications”, ISBN:published in by SPIE Press, Bellingham, WA, USA Book: Wolfgang Steinchen and Lian X.

Yang, “Digital Shearography: Theroy and Application of Digital Speckle Pattern Shearing Interferometry” ISBN Books & Publications Patents Teaching Laboratories Links: Patents in Germany, USA and Canada. US Patent Application: (January ), "3D Digital Image Correlation Using Single Color Camera Pseudo-Stereo System," L.X.

Yang, J.R. Li, G. Yang, and W. Digital shearography, also called TV-shearography, is a further technical development of shearography. The experimental setup ofdigital shearography is shown below on the right side. It is the technique using laser speckle as the carrier ofthe displacement information, recording the.

optics means that development of simple digital shearography. systems is now easier than ever before and more comple x. systems covering a wider range of measurement applications.

Genre/Form: Electronic books: Additional Physical Format: Print version: Yang, Lianxiang. Digital Shearography: New Developments and Applications.

Bellingham: Society of Photo-Optical Instrumentation Engineers (SPIE), ©   Digital speckle shearography (DSS) is a noncontact, full-field optical interferometric technique for the high sensitivity measurement of displacement derivatives at an object's surface.

It uses charge-coupled device (CCD) sensors as a recording medium and digital processing technology to acquire image data and analyse the results [17–22]. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

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Laser digitial shearography – NDT technique In Croucher Optical Nondestructive Testing (CNDT) Laboratory, it has different nondestructive testing methods for quality shearography is one of the optical technique that.

Overview. Laser shearography is an optical measurement technique. The shearography camera is a common path interferometer and images the first derivative of the out-of-plane deformation of the test part surface in response to a change in load. When a shearography camera is used to image an aircraft honeycomb panel, a wide range of defects may be seen including disbonds, damage to the core and impact damage.

The recent rapid development of rotation rate sensor technology opens new opportunities for their application in more and more fields. In this paper, the potential of rotational sensors for the modal analysis of full-scale civil engineering structural elements is experimentally examined.

For this purpose, vibrations of two 6-m long beams made of ultra-high performance concrete (UHPC) were. Digital Shearography 作者: Wolfgang Steinchen / Lianxiang Yang 出版社: SPIE Publications 副标题: Theory and Application of Digital Speckle Pattern Shearing Interferometry 出版年: 页数: 定价: USD 装帧: Hardcover ISBN: Books about digital photography for the photo enthusiast that inspire, inform, and help you capture beautiful photographs.

Score A book’s total score is based on multiple factors, including the number of people who have voted for it and how highly those voters ranked the book. This paper introduces a digital shearography system which utilizes the spatial phase-shift technique to obtain an extremely high acquisition rate.

The newly developed spatial phase-shift shearography system uses a Michelson-Interferometer as the shearing device. A high power laser at nm wavelength is used as the light source.

Laser Technology, Inc. (LTI) is the world leader in industrial laser shearography and holography NDT services and equipment for the aerospace, military, aircraft, automotive and marine industries. The digital measurement of the deformation derivative may be integrated to show the shape of the target surface deformation as well as the.

A COMPACT DIGITAL PHASE-STEPPING SHEAROGRAPHY SYSTEM Benjamin A. Bard Graduate Program in Acoustics Penn State University shearography is commonly used for flaw detection in a qualitative manner, stepping theory can be found in the book Optical Shop Testing [2].

Comparing shearography with other techniques. Future trends. Sources of further information and advice. Chapter 5: Non-destructive evaluation (NDE) of composites: digital shearography. Abstract: Introduction.

Principles of digital shearography. The practical application of digital shearography. Digital shearography as the latest version of shearography and the successor to electronic shearography, uncovered the full capability of shearography in many aspects (Hung ). Digital shearography utilizes a digital camera to capture information and create the digital photograph.

There are two primary types of image sensors in a digital. Measurement of Thermal Residual Strain Induced During the Hardening of a Sheet Metal and Reinforced Composite by Digital Shearography Shearography is an interferometric, non-contact and full field method for direct measurement of first derivatives of deformation (strain).

The Digital Photography Book book. Read 97 reviews from the world's largest community for readers. Scott Kelby, author of the groundbreaking bestseller “ /5(97).

In recent times, the application of enabling technologies such as digital shearography combined with deep learning approaches in the smart quality assessment of tires, which leads to intelligent tire manufacturing practices with automated defects detection.

Digital shearography is a prominent approach that can be employed for identifying the defects in tires, usually not visible to human eyes.

Shearography is an optical measurement technique used to rapidly detect various types of defects on composites and metallic materials. Shearography uses coherent light or sound waves to create a visual representation of the quality of the material for nondestructive testing, strain.

books so much better than what I turned in. You are this author’s secret weapon. To my photography assistant and digital tech Brad Moore: I don’t know how I would have gotten through this book without your help, your work in the studio (shooting so many of the.

Digital Photography School is a site dedicated to helping photographers of all levels get the most out of their cameras. Part of the way we do this is to produce quality ebooks and .Fortunately, the new RSIs can receive benefits from the accuracy of the methods of phase-shifting interferometry, and phase-shifting shearography is more sensitive than simple digital shearography.

There are two mainly trend to the RSIs based on phase-shifting technique, i.e. instantaneous phase-shifting and compact size.All models use digital measurement technology and let you take the guesswork out of your recreational measurements!

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