Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/37061

TitleRadiometric characterization of a novel LED array system for visual assessment
Author(s)Linhares, João M. M.
Neves, Helena
Ferreira, Daniela Lopes
Ribeiro, Miguel Faria
Matos, S. C. Peixoto de
González-Méijome, José Manuel
KeywordsNight vision
Visual assessment
Haloes
Glare
Starburst
Issue date2013
PublisherTaylor & Francis
JournalJournal of modern optics
CitationLinhares, J.M.M.; Neves, H.; Lopes-Ferreira, D.; Faria-Ribeiro, M.; Peixoto-De-Matos, S.C.; Gonzalez-Meijome, J.M.Radiometric characterization of a novel LED array system for visual assessment, Journal of Modern Optics, 60, 14, 1136-1144, 2013.
Abstract(s)Light that enters the eye can be distorted due to several factors leading to a poor visual performance. The purpose of this paper is to describe and characterize the light-emitting diode (LED) display system to be used in a new device to assess visual quality under high glare conditions. The device has a central white LED and surrounding white LEDs distributed in a radial manner. Each LED is controlled independently using special designed software. The spectral power distribution and color of the LEDs were assessed at different voltage intensities to test the response in terms of output luminance and spectral distribution. It was found that the typical maximum luminance was about 2800 cd/m2 and 6 cd/m2 for the central and surrounding LEDs, respectively. Their color was found to be within the ΔE⁄ ab range of 2.6 and 0.23, respectively, if the minimum and maximum intensities are considered. The characterization of this device was proved successfully, which might indicate its usefulness in future visual assessments.
TypeArticle
URIhttp://hdl.handle.net/1822/37061
DOI10.1080/09500340.2013.842614
ISSN0950-0340
1362-3044
Other identifiers0950-0340
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CDF - OCV - Artigos/Papers (with refereeing)

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