| High-speed, sub-Nyquist interferometry. | |
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MedLine Citation:
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PMID: 21643269 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The velocity measurement limit in dynamic interferometry is vNyq, the velocity at which the interferogram is sampled at the Nyquist limit. We show that vNyq can be exceeded by assuming continuity of the surface motion and unwrapping the velocity modulo 2vNyq. The technique was demonstrated in a high-speed speckle pattern interferometer with spatial phase stepping. Surface velocities of 4vNyq were measured experimentally. With a reduced exposure, high-speed sub-Nyquist interferometry could be implemented up to a maximum acceleration of vNyq/ts, where ts is the detector frame period. |
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Authors:
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Tao Wu; Jesus D Valera; Andrew J Moore |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Optics express Volume: 19 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-06-06 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: 10111-23 Citation Subset: IM |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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