Construction and characterization of a high luminance level source based on high power multi-chip white LEDs

In order to calibrate the luminance measurement devices at higher luminance ranges, a luminous source with a high-level light output is required. Such sources are usually provided by halogen lamps. However, with the developing semiconductor technologies in recent years, the creation of light sources...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ferhat Sametoglu, Esra Koc
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Luminance Luminance source High power LED Characterization Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/7b43d8badab4414eb6ad3b66844e958d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:7b43d8badab4414eb6ad3b66844e958d
record_format	dspace
spelling	oai:doaj.org-article:7b43d8badab4414eb6ad3b66844e958d2021-11-06T04:41:52ZConstruction and characterization of a high luminance level source based on high power multi-chip white LEDs2666-950110.1016/j.rio.2021.100170https://doaj.org/article/7b43d8badab4414eb6ad3b66844e958d2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666950121001164https://doaj.org/toc/2666-9501In order to calibrate the luminance measurement devices at higher luminance ranges, a luminous source with a high-level light output is required. Such sources are usually provided by halogen lamps. However, with the developing semiconductor technologies in recent years, the creation of light sources with high-power white light-emitting diodes (LEDs) has begun to be included in the field of metrology. For this reason, a luminous source having a wide range of luminance production capabilities has been developed. The source was based on an integrating sphere with two high-power white LEDs and a variable power supply. Forced convection was utilized by using a cooling fan to increase the heat transfer together with the existing heat sink to prevent the LEDs from being damaged at high current levels and to provide stable optical output. The cooling performance of the LEDs and optical characterization studies such as the spectral characteristics and produced luminance depend on driving currents and spatial surface homogeneity of the constructed luminance source were also carried out. With the constructed luminance source, luminance calibration of a meter up to 200000 cd/m2 level can be performed.Ferhat SametogluEsra KocElsevierarticleLuminanceLuminance sourceHigh power LEDCharacterizationOptics. LightQC350-467ENResults in Optics, Vol 5, Iss , Pp 100170- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Luminance Luminance source High power LED Characterization Optics. Light QC350-467
spellingShingle	Luminance Luminance source High power LED Characterization Optics. Light QC350-467 Ferhat Sametoglu Esra Koc Construction and characterization of a high luminance level source based on high power multi-chip white LEDs
description	In order to calibrate the luminance measurement devices at higher luminance ranges, a luminous source with a high-level light output is required. Such sources are usually provided by halogen lamps. However, with the developing semiconductor technologies in recent years, the creation of light sources with high-power white light-emitting diodes (LEDs) has begun to be included in the field of metrology. For this reason, a luminous source having a wide range of luminance production capabilities has been developed. The source was based on an integrating sphere with two high-power white LEDs and a variable power supply. Forced convection was utilized by using a cooling fan to increase the heat transfer together with the existing heat sink to prevent the LEDs from being damaged at high current levels and to provide stable optical output. The cooling performance of the LEDs and optical characterization studies such as the spectral characteristics and produced luminance depend on driving currents and spatial surface homogeneity of the constructed luminance source were also carried out. With the constructed luminance source, luminance calibration of a meter up to 200000 cd/m2 level can be performed.
format	article
author	Ferhat Sametoglu Esra Koc
author_facet	Ferhat Sametoglu Esra Koc
author_sort	Ferhat Sametoglu
title	Construction and characterization of a high luminance level source based on high power multi-chip white LEDs
title_short	Construction and characterization of a high luminance level source based on high power multi-chip white LEDs
title_full	Construction and characterization of a high luminance level source based on high power multi-chip white LEDs
title_fullStr	Construction and characterization of a high luminance level source based on high power multi-chip white LEDs
title_full_unstemmed	Construction and characterization of a high luminance level source based on high power multi-chip white LEDs
title_sort	construction and characterization of a high luminance level source based on high power multi-chip white leds
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7b43d8badab4414eb6ad3b66844e958d
work_keys_str_mv	AT ferhatsametoglu constructionandcharacterizationofahighluminancelevelsourcebasedonhighpowermultichipwhiteleds AT esrakoc constructionandcharacterizationofahighluminancelevelsourcebasedonhighpowermultichipwhiteleds
_version_	1718443862047850496

Construction and characterization of a high luminance level source based on high power multi-chip white LEDs

Ejemplares similares