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| Study on LED Total Spectral Radiant Flux Measurement Technology |
| LIU Hui1,ZHAO Wei-qiang1,LIU Jian1,LI Yi2,ZHAO Hai-su1 |
1.National Institute of Metrology, Beijing 100029, China;
2.Shaanxi Institute of Metrology Science, Xi′an, Shaanxi 710065, China |
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Abstract The theory and method of measuring total radiant flux and total spectral radiant flux is described. The components and character of a goniospectroradiometer had been introduced. Three kind of light sources have been measured, the measurement uncertainty is 1.6%~3.6%(k=2). Luminous flux calculated by the spectra radiant flux comparison with NIM′s photometric based luminous flux scale shows that agreement is within 0.9%, well within the combined measurement uncertainty.
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2014, Vol. 35 
