Application of an achromatic shearing phase sensor for the alignment of a segmented telescope

Persistent Link:
http://hdl.handle.net/10150/280004
Title:
Application of an achromatic shearing phase sensor for the alignment of a segmented telescope
Author:
Walker, Chanda
Issue Date:
2002
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:
An achromatic shearing phase sensor is proposed as a phasing technique for the alignment of segmented telescopes. The sensor is based upon a shearing interferometer using two-wavelength interferometry methods. The two beams are created with a diffraction grating. The diffracted orders are re-imaged such that the pupil plane is focused onto a CCD array with a shear displacing the two orders. The amount of shear is equal to the size of the re-imaged segments. The sensor was measured to have a capture range of at least 5 μm, and an accuracy of 0.3 μm or better. The repeatability was 0.1 vm. The sensor is very sensitive to field dependent aberrations in its optical design but the resulting errors can be calibrated. The sensor is an improvement over similar technologies because it can measure and compensate for segment aberrations with tilt and piston adjustments. The sensor is compatible with many mature interferometry techniques and can be used with extended and broadband sources.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Physics, Astronomy and Astrophysics.; Physics, Optics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Optical Sciences
Degree Grantor:
University of Arizona
Advisor:
Lloyd-Hart, Michael

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleApplication of an achromatic shearing phase sensor for the alignment of a segmented telescopeen_US
dc.creatorWalker, Chandaen_US
dc.contributor.authorWalker, Chandaen_US
dc.date.issued2002en_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.abstractAn achromatic shearing phase sensor is proposed as a phasing technique for the alignment of segmented telescopes. The sensor is based upon a shearing interferometer using two-wavelength interferometry methods. The two beams are created with a diffraction grating. The diffracted orders are re-imaged such that the pupil plane is focused onto a CCD array with a shear displacing the two orders. The amount of shear is equal to the size of the re-imaged segments. The sensor was measured to have a capture range of at least 5 μm, and an accuracy of 0.3 μm or better. The repeatability was 0.1 vm. The sensor is very sensitive to field dependent aberrations in its optical design but the resulting errors can be calibrated. The sensor is an improvement over similar technologies because it can measure and compensate for segment aberrations with tilt and piston adjustments. The sensor is compatible with many mature interferometry techniques and can be used with extended and broadband sources.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectPhysics, Astronomy and Astrophysics.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.advisorLloyd-Hart, Michaelen_US
dc.identifier.proquest3053868en_US
dc.identifier.bibrecord.b42811594en_US
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