Radiometric characterization of a novel LED array system for visual assessment
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/37061 |
Resumo: | 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. |
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Radiometric characterization of a novel LED array system for visual assessmentNight visionVisual assessmentHaloesGlareStarburstScience & TechnologyLight 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.This study has been funded by FEDER through the COMPTETE Program and by the Portuguese Foundation for Science and Technology (FCT) in the framework of projects PTDC/SAU-BEB/098391/2008, PTDC/SAU-BEB/098392/2008 and the Strategic Project PEST-C/FIS/UI607/2011.Taylor and FrancisUniversidade do MinhoLinhares, João M. M.Neves, HelenaFerreira, Daniela LopesRibeiro, Miguel FariaMatos, S. C. Peixoto deGonzález-Méijome, José Manuel20132013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/37061engLinhares, 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, 2013.0950-034010.1080/09500340.2013.842614info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:40:48ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Radiometric characterization of a novel LED array system for visual assessment |
title |
Radiometric characterization of a novel LED array system for visual assessment |
spellingShingle |
Radiometric characterization of a novel LED array system for visual assessment Linhares, João M. M. Night vision Visual assessment Haloes Glare Starburst Science & Technology |
title_short |
Radiometric characterization of a novel LED array system for visual assessment |
title_full |
Radiometric characterization of a novel LED array system for visual assessment |
title_fullStr |
Radiometric characterization of a novel LED array system for visual assessment |
title_full_unstemmed |
Radiometric characterization of a novel LED array system for visual assessment |
title_sort |
Radiometric characterization of a novel LED array system for visual assessment |
author |
Linhares, João M. M. |
author_facet |
Linhares, João M. M. Neves, Helena Ferreira, Daniela Lopes Ribeiro, Miguel Faria Matos, S. C. Peixoto de González-Méijome, José Manuel |
author_role |
author |
author2 |
Neves, Helena Ferreira, Daniela Lopes Ribeiro, Miguel Faria Matos, S. C. Peixoto de González-Méijome, José Manuel |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Linhares, João M. M. Neves, Helena Ferreira, Daniela Lopes Ribeiro, Miguel Faria Matos, S. C. Peixoto de González-Méijome, José Manuel |
dc.subject.por.fl_str_mv |
Night vision Visual assessment Haloes Glare Starburst Science & Technology |
topic |
Night vision Visual assessment Haloes Glare Starburst Science & Technology |
description |
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. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013 2013-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/37061 |
url |
http://hdl.handle.net/1822/37061 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Linhares, 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. 0950-0340 10.1080/09500340.2013.842614 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Taylor and Francis |
publisher.none.fl_str_mv |
Taylor and Francis |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
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repository.mail.fl_str_mv |
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1777303816382709760 |