Persistent Link:
http://hdl.handle.net/10150/280499
Title:
Simultaneous phase shifted digital speckle pattern interferometry
Author:
Saif, Babak Nasser
Issue Date:
2004
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:
The James Webb Space Telescope (JWST) is an anastigmatic, segmented cryogenic telescope. The stability of the primary mirror back-plane is a major concern in co-phasing the telescope and in the longer term stability of its image quality. The back-plane is a 6.6 meter structure constructed of carbon fiber, and is therefore a "diffuse" object, an object with surface roughness larger than the wavelength of the light. For this reason classical interferometeric measurements will not work. The objective is to design and characterize a Simultaneous phase shifted Digital Speckle Pattern Interferometer (SDSPI) that has the most potential to measure the JWST back plane structure within the required accuracy (15 nm RMS out-of-plane motion). SDSPI interferometry is a method of measuring the back-plane deformations that has the potential of reaching the required accuracy in the presence of vibrations within cryogenic chambers. 4D Technology Corporation, in Tucson, Arizona has an instantaneous phase shifted interferometer (PhaseCam) that is modified to a SDSPI interferometer. Repeatability, dynamic range, and accuracy of the SDSPI is characterized by measuring a 5cm x 5cm back-plane structure made of carbon fiber.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Engineering, Electronics and Electrical.; Physics, Optics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Optical Sciences
Degree Grantor:
University of Arizona
Advisor:
Wyant, James C.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleSimultaneous phase shifted digital speckle pattern interferometryen_US
dc.creatorSaif, Babak Nasseren_US
dc.contributor.authorSaif, Babak Nasseren_US
dc.date.issued2004en_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.abstractThe James Webb Space Telescope (JWST) is an anastigmatic, segmented cryogenic telescope. The stability of the primary mirror back-plane is a major concern in co-phasing the telescope and in the longer term stability of its image quality. The back-plane is a 6.6 meter structure constructed of carbon fiber, and is therefore a "diffuse" object, an object with surface roughness larger than the wavelength of the light. For this reason classical interferometeric measurements will not work. The objective is to design and characterize a Simultaneous phase shifted Digital Speckle Pattern Interferometer (SDSPI) that has the most potential to measure the JWST back plane structure within the required accuracy (15 nm RMS out-of-plane motion). SDSPI interferometry is a method of measuring the back-plane deformations that has the potential of reaching the required accuracy in the presence of vibrations within cryogenic chambers. 4D Technology Corporation, in Tucson, Arizona has an instantaneous phase shifted interferometer (PhaseCam) that is modified to a SDSPI interferometer. Repeatability, dynamic range, and accuracy of the SDSPI is characterized by measuring a 5cm x 5cm back-plane structure made of carbon fiber.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectEngineering, Electronics and Electrical.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.advisorWyant, James C.en_US
dc.identifier.proquest3119982en_US
dc.identifier.bibrecord.b45645851en_US
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