Spatial phase measurement techniques in modified grating interferometry

Persistent Link:
http://hdl.handle.net/10150/282257
Title:
Spatial phase measurement techniques in modified grating interferometry
Author:
Schmit, Joanna, 1963-
Issue Date:
1996
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
High sensitivity grating interferometry has become an important method in experimental mechanics to measure, with submicron sensitivity, the in-plane displacements of nearly flat objects under load. This study looks to extend the use of this interferometric setup through specific modifications to the interferometric setup, focusing specifically on developing the system's ability to register simultaneously both the in-plane and out-of-plane displacements so that dynamic events may be examined with great precision and speed. First presented is the author's approach for mapping in- and out-of-plane displacements through modifications to a conventional grating interferometer. Then, the author extends the method to the analysis of dynamic events, proposing a few workable solutions for registering two interferograms at the same time. Included in this discussion are suggestions for acquiring the orthogonal in-plane displacements u and v and the out-of-plane displacement w simultaneously. The second part of the work details the analysis of different phase measurement techniques, focusing on the error sources inherent in each approach. New, error-reducing algorithms are presented and the influence of the intensity sample weighting (window function) on phase errors is described. A spatial, phase measurement technique advanced by the author, the M-point technique, is chosen as the best choice for achieving fast analysis and high accuracy in displacement testing in the modified grating interferometric setup.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Applied Mechanics.; Physics, Optics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Optical Sciences
Degree Grantor:
University of Arizona
Advisor:
Creath, Katherine

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleSpatial phase measurement techniques in modified grating interferometryen_US
dc.creatorSchmit, Joanna, 1963-en_US
dc.contributor.authorSchmit, Joanna, 1963-en_US
dc.date.issued1996en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractHigh sensitivity grating interferometry has become an important method in experimental mechanics to measure, with submicron sensitivity, the in-plane displacements of nearly flat objects under load. This study looks to extend the use of this interferometric setup through specific modifications to the interferometric setup, focusing specifically on developing the system's ability to register simultaneously both the in-plane and out-of-plane displacements so that dynamic events may be examined with great precision and speed. First presented is the author's approach for mapping in- and out-of-plane displacements through modifications to a conventional grating interferometer. Then, the author extends the method to the analysis of dynamic events, proposing a few workable solutions for registering two interferograms at the same time. Included in this discussion are suggestions for acquiring the orthogonal in-plane displacements u and v and the out-of-plane displacement w simultaneously. The second part of the work details the analysis of different phase measurement techniques, focusing on the error sources inherent in each approach. New, error-reducing algorithms are presented and the influence of the intensity sample weighting (window function) on phase errors is described. A spatial, phase measurement technique advanced by the author, the M-point technique, is chosen as the best choice for achieving fast analysis and high accuracy in displacement testing in the modified grating interferometric setup.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectApplied Mechanics.en_US
dc.subjectPhysics, Optics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineOptical Sciencesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorCreath, Katherineen_US
dc.identifier.proquest9720665en_US
dc.identifier.bibrecord.b34579540en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.