Phase of white light and its compatibility to the optical path

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dc.contributor.authorBouchal, Petrcs
dc.contributor.authorChmelík, Radimcs
dc.contributor.authorBouchal, Zdeněkcs
dc.coverage.issue8cs
dc.coverage.volume29cs
dc.date.accessioned2021-12-14T15:55:54Z
dc.date.available2021-12-14T15:55:54Z
dc.date.issued2021-03-12cs
dc.description.abstractThe phase of monochromatic light directly relates to the optical path difference (OPD), but finding this connection for spectrally broadband light is challenging. Due to a missing concept of the compatibility between the phase of randomly fluctuating fields and the OPD, demanding scanning is the only proven way for a highly accurate OPD measurement in white light. Here, we use the self-coherence function (SCF) of the spatially incoherent light to reveal the connection between the white-light phase and the OPD. Our method uses an associated field assigned to the SCF to mimic the intensity oscillation of a correlation pattern. The associated field allows restoring a cumulative OPD integrated into the SCF across all spectral constituents. The method is essential for quantitative phase microscopy, in which the SCF is available even in white light, but its processing beyond the quasi-monochromatic approach is still lacking. Improper assessment of the white-light phase may result in a loss of measurement accuracy, as we demonstrate theoretically and experimentally. Deploying our method in coherence-controlled holographic microscopy, we measured the cumulative OPD in the broadband light with a strongly asymmetric spectrum (bandwidth of 150 nm), achieving accuracy better than 5 nm in the measuring depth range of 2 mu m. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreementen
dc.formattextcs
dc.format.extent12398-12412cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationOPTICS EXPRESS. 2021, vol. 29, issue 8, p. 12398-12412.en
dc.identifier.doi10.1364/OE.418878cs
dc.identifier.issn1094-4087cs
dc.identifier.other172554cs
dc.identifier.urihttp://hdl.handle.net/11012/203218
dc.language.isoencs
dc.publisherOptical Society of Americacs
dc.relation.ispartofOPTICS EXPRESScs
dc.relation.urihttps://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-8-12398&id=449962cs
dc.rights(C) Optical Society of Americacs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1094-4087/cs
dc.subjectMicroscopyen
dc.subjectHolographyen
dc.subjectCoherenceen
dc.subjectPhase of lighten
dc.subjectOptical path differenceen
dc.titlePhase of white light and its compatibility to the optical pathen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-172554en
sync.item.dbtypeVAVen
sync.item.insts2021.12.14 16:55:54en
sync.item.modts2021.12.14 16:15:09en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Experimentální biofotonikacs
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