Simultaneous laser vibrometry on multiple surfaces with a single beam system using range-resolved interferometry

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dc.contributor.authorKissinger, Thomas
dc.contributor.authorCharrett, Thomas O. H.
dc.contributor.authorJames, Stephen W.
dc.contributor.authorAdams, Alvin
dc.contributor.authorTwin, Andrew
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2016-02-04T10:37:42Z
dc.date.available2016-02-04T10:37:42Z
dc.date.issued2015-06
dc.description.abstractA novel range-resolved interferometric signal processing technique that uses sinusoidal optical frequency modulation is applied to multi-surface vibrometry, demonstrating simultaneous optical measurements of vibrations on two surfaces using a single, collimated laser beam, with a minimum permissible distance of 3.5 cm between surfaces. The current system, using a cost-effective laser diode and a fibre-coupled, downlead insensitive setup, allows an interferometric fringe rate of up to 180 kHz to be resolved with typical displacement noise levels of 8 pm Hz-0.5. In this paper, the system is applied to vibrometry measurements of a table-top cryostat, with concurrent measurements of the optical widow and the sample holder inside. This allows the separation of common-mode vibrations of the whole cryostat from differential vibrations between the window and the sample holder.en_UK
dc.description.sponsorshipEPSRCen_UK
dc.identifier.citationKissinger, T., Charrett, T.O.H., James, S.W., Adams, A., Twin, A. and Tatam, R.P. 2015. Simultaneous laser vibrometry on multiple surfaces with a single beam system using range-resolved interferometry. Proceedings of the SPIE, 9525, Optical measurement systems for industrial inspection IX, paper number 952520. DOI: 10.1117/12.2183281en_UK
dc.identifier.issn0277-786X
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/9684
dc.language.isoenen_UK
dc.publisherSPIEen_UK
dc.subjectInterferometryen_UK
dc.subjectVibrometryen_UK
dc.subjectDisplacement sensingen_UK
dc.subjectRange-resolved interferometric signal processingen_UK
dc.subjectLDVen_UK
dc.subjectMulti-surface vibrometryen_UK
dc.subjectCryogenicsen_UK
dc.subjectLow temperatureen_UK
dc.titleSimultaneous laser vibrometry on multiple surfaces with a single beam system using range-resolved interferometryen_UK
dc.typeConference paperen_UK

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