DocumentCode :
666675
Title :
Evaluation of lighting systems through adaptation of photometric quantities
Author :
Casagrande, Cristiano G. ; Nogueira, Fernando J. ; Campos, Marcos F. C. ; Braga, Henrique A. C. ; Rodrigues, Claudio R. B. S.
Author_Institution :
NIMO - Modern Lighting Res. Group, Univ. Fed. de Juiz de Fora, Juiz de Fora, Brazil
fYear :
2013
fDate :
10-13 Nov. 2013
Firstpage :
6069
Lastpage :
6074
Abstract :
The human eye presents different visual responses for different luminosity conditions. Thus, it can be defined different regimes of operation of the human visual system, like photopic and scotopic regimes, for high and low luminance levels respectively. All the classic photometry is based on the vision sensibility under the photopic regime. However, in several situations, it is common to face intermediate conditions known as mesopic. So, in order to convert photometric quantities between photopic and mesopic regimes, there is an equation in literature that describes the relationship between photopic and scotopic luminous fluxes as a function of the color correlate temperature. However, there are some evidences that this expression does not apply accurately to all technologies of light sources. Thus, this paper presents laboratory data showing that the equation in question does not apply to all lighting technologies, pointing towards a review of that relationship.
Keywords :
lighting; photometric light sources; photometry; color correlate temperature; human visual system; lighting systems; mesopic regime; photometric quantities; photometry; photopic regime; scotopic luminous fluxes; Equations; Image color analysis; Light emitting diodes; Light sources; Lighting; Mathematical model; Photometry; human visual system; lighting; mesopic vision; photometry; scotopic/photopic ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
ISSN :
1553-572X
Type :
conf
DOI :
10.1109/IECON.2013.6700132
Filename :
6700132
Link To Document :
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