Development of detectors and calibration methods for spectral irradiance and radiometric temperature measurements

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorNoorma, Mart 
dc.contributor.departmentDepartment of Electrical and Communications Engineeringen
dc.contributor.departmentSähkö- ja tietoliikennetekniikan osastofi
dc.contributor.labMetrology Research Instituteen
dc.contributor.labMIKES Mittaustekniikan laboratoriofi
dc.date.accessioned2012-02-17T07:05:31Z
dc.date.available2012-02-17T07:05:31Z
dc.date.issued2005-07-06 
dc.description.abstractThe research work, described in this thesis, has been carried out at the Metrology Research Institute of Helsinki University of Technology between 2000 and 2005. The research focused on the development of new detectors, calibration methods and their applications in optical radiometry. A new photodetector, which is based on three GaAsP Schottky-barrier photodiodes, has been introduced. The spectral properties of the GaAsP trap detector have been studied in the wavelength range between 200 nm and 600 nm. Spectral reflectance of a single windowless GaAsP photodiode, measured with high-accuracy gonioreflectometer, has been presented. Based on these measurements, the internal quantum efficiencies for both the single photodiode and the trap detector have been calculated. A novel scanning method for characterization of filter radiometers, which uses a wavelength tuneable Ti:Sapphire laser source, has been described. High accuracy calibration of filter radiometers at 900 nm has been conducted. The results have been compared to the spectral irradiance responsivities measured with the more conventional monochromator-based method. Both the laser-based method and the monochromator-based method have been used for characterization of the detectors for radiometric measurements of the thermodynamic temperatures of several blackbodies in irradiance mode. Four filter radiometers with central wavelengths between 600 nm and 900 nm have been used. The measured temperatures include the freezing temperature of silver and copper, which are defined by the International Temperature Scale of 1990.en
dc.description.versionrevieweden
dc.format.extent38, [app] 
dc.format.mimetypeapplication/pdf 
dc.identifier.isbn951-22-7748-4 
dc.identifier.issn1237-3281 
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/2586
dc.identifier.urnurn:nbn:fi:tkk-005405 
dc.language.isoenen
dc.publisherHelsinki University of Technologyen
dc.publisherTeknillinen korkeakoulufi
dc.relation.haspartM. Noorma, P. Kärhä, A. Lamminpää, S. Nevas, and E. Ikonen. 2005. Characterization of GaAsP trap detector for radiometric measurements in ultraviolet wavelength region. Review of Scientific Instruments 76, 033110, 5 pages. 
dc.relation.haspartM. Noorma, P. Toivanen, F. Manoocheri, and E. Ikonen. 2003. Characterization of filter radiometers with a wavelength-tunable laser source. Metrologia 40, S220-S223. 
dc.relation.haspartM. Noorma, P. Kärhä, T. Jankowski, F. Manoocheri, T. Weckström, L. Uusipaikka, and E. Ikonen. 2004. Absolute detector-based radiometric temperature scale. Proceedings of the 9th International Symposium on Temperature and Thermal Measurements in Industry and Science (TEMPMEKO 2004), accepted for publication. 
dc.relation.haspartM. Noorma, V. Ahtee, A. Lamminpää, P. Kärhä, F. Manoocheri, T. Weckström, and E. Ikonen. 2005. Radiometric temperature measurements with absolutely characterized filter radiometers in irradiance mode. Helsinki University of Technology, Metrology Research Institute Report 24/2005. 
dc.relation.ispartofseriesMetrology Research Institute reporten
dc.relation.ispartofseries25en
dc.subject.keywordopticsen
dc.subject.keywordmetrologyen
dc.subject.keywordradiometryen
dc.subject.keywordthermometryen
dc.subject.keywordoptical detectorsen
dc.subject.otherElectrical engineeringen
dc.titleDevelopment of detectors and calibration methods for spectral irradiance and radiometric temperature measurementsen
dc.typeG5 Artikkeliväitöskirjafi
dc.type.dcmitypetexten
dc.type.ontasotVäitöskirja (artikkeli)fi
dc.type.ontasotDoctoral dissertation (article-based)en
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local.aalto.digifolderAalto_63967
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