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Adaptive autofocus technique for speckle control in optical feedback interferometry

dc.contributor.authorAtashkhooei, Reza
dc.contributor.authorRoyo Royo, Santiago
dc.contributor.authorAzcona Guerrero, Francisco Javier
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Òptica i Optometria
dc.date.accessioned2015-01-15T12:18:57Z
dc.date.created2014-09-01
dc.date.issued2014-09-01
dc.identifier.citationAtashkhooei, R.; Royo, S.; Azcona, F. Adaptive autofocus technique for speckle control in optical feedback interferometry. "Sensors and actuators A. Physical", 01 Setembre 2014, vol. 216, p. 243-248.
dc.identifier.issn0924-4247
dc.identifier.urihttp://hdl.handle.net/2117/25609
dc.description.abstractAn adaptive autofocus technique for the control of speckle effect in optical feedback interferometry (OFI) is discussed. The beam spot size effect over the OFI signal is presented, justifying the proposed approach. An automated setup for the control of speckle effect using a liquid lens with electro-optical focusing is demonstrated. The spot size is modified according to the signal to noise ratio (SNR) bounds selected for the captured OFI signal, therefore avoiding signal fading caused by speckle effect and possible chaotic behavior because of strong feedback. The quality and shape of the acquired OFI signal when the spot size change takes place shows a transient oscillation without any additional effects over the OFI SNR and the OFI shape. Experimental examples are provided proving the effectiveness of the approach for speckle control in displacement and velocity measurements within a movement range of 20 mm. (C) 2014 Elsevier B.V. All rights reserved.
dc.format.extent6 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física::Acústica
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica::Optoelectrònica
dc.subject.lcshDetectors
dc.subject.lcshInterferometry
dc.subject.lcshSpeckle
dc.subject.lcshVibration
dc.subject.otherAdaptive measurements
dc.subject.otherDisplacement sensor
dc.subject.otherFeedback control
dc.subject.otherSelf-mixing interferometry
dc.subject.otherSpeckle effect
dc.subject.otherVibration measurement
dc.subject.otherSELF-MIXING INTERFEROMETRY
dc.subject.otherLASER-DIODE
dc.subject.otherDISPLACEMENT
dc.subject.otherVIBRATION
dc.titleAdaptive autofocus technique for speckle control in optical feedback interferometry
dc.typeArticle
dc.subject.lemacDetectors
dc.subject.lemacInterferometria
dc.subject.lemacVibració
dc.contributor.groupUniversitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica
dc.identifier.doi10.1016/j.sna.2014.06.003
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0924424714002982
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac15142322
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorAtashkhooei, R.; Royo, S.; Azcona, F.
local.citation.publicationNameSensors and actuators A. Physical
local.citation.volume216
local.citation.startingPage243
local.citation.endingPage248


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