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CIE 127:2007

Measurement of LEDs
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There are significant differences between LEDs and other light sources which made it necessary for the CIE to introduce new quantities for their characterization with precisely defined measurement conditions. New quantities introduced here are Averaged LED Intensity and Partial LED Flux .-\n--\n-The report describes in detail the measurement conditions for ALI (Averaged LED Intensity), Total and Partial LED Flux and Spectral Power Distribution. It is shown that measurements by substitution method using LED standards can be simpler; however it is important to compare similar coloured LEDs or use colour correction on the measurement results. The standard LEDs need to be calibrated by National Metrology Laboratories or a laboratory traceable to National Metrology Laboratories. Keywords: LED, radiometry, photometry, colorimetry
SDO CIE: International Commission on Illumination
Document Number 127
Publication Date Jan. 1, 2007
Language en - English
Page Count 40
Revision Level
Supercedes
Committee
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