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A multidirectional spectral measurement method and instrument to investigate non-image-forming effects of light
Built environment, Technische Universiteit Eindhoven, Eindhoven, Netherlands.
Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Building Lighting Group, Department of the Built Environment, and Intelligent Lighting Institute, Eindhoven University of Technology, Eindhoven, Netherlands.ORCID iD: 0000-0001-7520-1593
Built environment, Technische Universiteit Eindhoven, Eindhoven, Netherlands.
Philips Research, Eindhoven, North Brabant, Netherlands.
2018 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 29, no 8, article id 085902Article in journal (Refereed) Published
Abstract [en]

Light directionality, spectrum, and relevant radiometric or photometric quantity are believed essential factors influencing the magnitude of non-image-forming effects. In this paper, a measurement method and an instrument (the multidirectional spectroradiometer - MuS) is proposed, which considers different light incidents and spectra simultaneously, therefore, enables measurement of light characteristics relevant for non-image-forming effects. The MuS consists of four spectroradiometers measuring in different directions. Four spectrometers using optical fibers were configured to measure the spectral irradiance within a wavelength range from 200 to 1100 nm with ~5.7 nm pixel resolution. Application of the MuS facilitates a better understanding of the non-image-forming light characteristics of spaces. The MuS is tested with stable electric lighting and with dynamic daylight conditions and is proven reliable to perform continuous spectral measurements in different directions simultaneously. Results show a substantial difference in measured radiation magnitude and spectral distribution in different directions, which suggests varying impact on non-image-forming effects.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2018. Vol. 29, no 8, article id 085902
Keywords [en]
light incident; spectrum; (day) lighting design; health and well-being
National Category
Architectural Engineering
Identifiers
URN: urn:nbn:se:hj:diva-40766DOI: 10.1088/1361-6501/aac937ISI: 000436958400001Scopus ID: 2-s2.0-85050393631Local ID: JTHBebyggdISOAI: oai:DiVA.org:hj-40766DiVA, id: diva2:1223172
Available from: 2018-06-25 Created: 2018-06-25 Last updated: 2018-09-17Bibliographically approved

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The full text will be freely available from 2019-05-31 00:00
Available from 2019-05-31 00:00

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Aries, Myriam

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