Full-field interferometry using infinity corrected optics

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dc.contributor.authorCharrett, Thomas O. H.
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2016-04-21T14:57:20Z
dc.date.available2016-04-21T14:57:20Z
dc.date.issued2015-12-01
dc.description.abstractIn this paper the construction of full-field (imaging) interferometers using infinity corrected optics commonly used in microscopy is discussed, with an emphasis on self-mixing interferometry configurations where the imaged light field is mixed with itself rather than a reference wave. Such configurations are used in speckle shearing interferometry, flow visualisation and quantitative flow measurement. The critical considerations for constructing path-length imbalanced full-field interferometers for these and similar applications are discussed, expressions are derived for key calculations and interferograms from example interferometers are presented. These include the concept of balancing the infinity-spaces of the two arms via the use of a glass block to minimise the optical path difference variation across the interferogram and ensure adequate sampling of the fringes on the detector. Further, the use of tilted glass blocks in single-pass and double-pass arrangements is detailed for the generation and control of spatial carrier fringes without extensive realignment of the interferometer, and for phase shifting.en_UK
dc.identifier.citationTOH Charrett and R P Tatam, Full-field interferometry using infinity corrected optics, Measurement Science and Technology, vol. 27, Iss. 1, pp. 015402, 2016, http://stacks.iop.org/0957-0233/27/i=1/a=015402en_UK
dc.identifier.issn0957-0233
dc.identifier.urihttp://dx.doi.org/10.1088/0957-0233/27/1/015402
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/9837
dc.language.isoenen_UK
dc.publisherIOP Publishingen_UK
dc.rightsContent from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.en_UK
dc.subjectInfinity corrected optical systemsen_UK
dc.subjectInterferometric imagingen_UK
dc.subjectFringe analysisen_UK
dc.subjectShearographyen_UK
dc.subjectPlanar Doppler velocimetryen_UK
dc.subjectPDVen_UK
dc.subjectDoppler global velocimetryen_UK
dc.subjectDGVen_UK
dc.titleFull-field interferometry using infinity corrected opticsen_UK
dc.typeArticleen_UK

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