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Virtual spectral selectivity in a modulated thermal infrared emitter with lock-in detection

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Laboratorio de Sensores Teledetección e Imagen en el Infrarrojoes
dc.contributor.authorSantalices, David
dc.contributor.authorMeléndez Sánchez, Juan
dc.contributor.authorBriz Pacheco, Susana
dc.contributor.funderComunidad de Madrides
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es
dc.date.accessioned2023-04-13T07:33:11Z
dc.date.available2023-04-13T07:33:11Z
dc.date.issued2022-07-02
dc.descriptionThis article belongs to the Section Optical Sensorsen
dc.description.abstractThe need for affordable low-power devices has led MEMS-based thermal emitters to become an interesting option for optical gas sensors. Since these emitters have a low thermal mass, they can be easily modulated and combined with a lock-in amplifier for detection. In this paper, we show that the signal measured by a lock-in amplifier from a thermal emitter that varies its temperature periodically can have different spectral profiles, depending on the reference signal used. These virtual emitters appear because the Fourier series expansion of the emitted radiance, as a function of time, has different coefficients for each wavelength, and this spectral signature, which is different for each harmonic, can be retrieved using a reference signal that corresponds to its frequency. In this study, the effect is first proved theoretically and then is measured experimentally. For this purpose, we performed measurements with an IR camera provided with six different spectral filters of a modulated emitter, in combination with lock-in amplification via software. Finally, we show a potential application of this effect using multiple virtual emitters to gain spectral selectivity and distinguish between two gases, CO2 and CH4.en
dc.description.sponsorshipThis work has been supported by the Madrid Government (Comunidad de Madrid-Spain) under the Multi-annual Agreement with UC3M in the line of Excellence of University Professors (EPUC3M14), and in the context of the V PRICIT (Regional Programme of Research and Technological Innovation). The authors acknowledge FEDER/Ministerio de Ciencia, Innovación y Universidades Agencia Estatal de Investigación for financial support under project RTI2018-099825-B-C33.en
dc.format.extent12
dc.identifier.bibliographicCitationSantalices, D., Meléndez, J. C., & Briz, S. (2022). Virtual Spectral Selectivity in a Modulated Thermal Infrared Emitter with Lock-In Detection. Sensors, 22(14), 5451.en
dc.identifier.doihttps://doi.org/10.3390/s22145451
dc.identifier.issn1424-3210
dc.identifier.publicationfirstpage1
dc.identifier.publicationissue14, 5451
dc.identifier.publicationlastpage12
dc.identifier.publicationtitleSensorsen
dc.identifier.publicationvolume22
dc.identifier.urihttps://hdl.handle.net/10016/37043
dc.identifier.uxxiAR/0000031406
dc.language.isoeng
dc.publisherMDPI
dc.relation.projectIDGobierno de España. RTI2018-099825-B-C33es
dc.relation.projectIDComunidad de Madrid. EPUC3M14es
dc.rights© 2022 by the authors.en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaFísicaes
dc.subject.ecienciaMaterialeses
dc.subject.ecienciaRobótica e Informática Industriales
dc.subject.otherThermal emitteren
dc.subject.otherBlackbodyen
dc.subject.otherLock-in amplifieren
dc.subject.otherFourier seriesen
dc.subject.otherOptical gas sensoren
dc.subject.otherGas detectionen
dc.subject.otherVirtual emitteren
dc.subject.otherMethaneen
dc.subject.otherCO2en
dc.subject.otherSpectral selectivityen
dc.titleVirtual spectral selectivity in a modulated thermal infrared emitter with lock-in detectionen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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