6 October 2005 Detector-based luminance and illuminance measurements at UME
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Abstract
The luminous intensity unit and traceability in derived units of illuminance and luminance were realized using new detector-based approach at the National Metrology Institute of Turkey. Services in photometry were enlarged to perform high-level illuminance and luminance meter calibrations, namely at levels up to 5000 lx and 5000 cd/m2 by using the working standard photometer heads, precise apertures and integrating spheres on the 6 m long photometric bench. Working standart photometer heads which consist of a single silicon photodiode, V(λ)-corrected filter, precision aperture and a cosine corrected diffuser were calibrated for luminous responsivity in A/lx. For precision in the measurements, positions of illuminance meters and photometer heads are compared by using step motor controlled translation stages. The measurements are carried out at the color temperature of 2856 K and in the conditions where the inverse square law is applicable. The same photometer heads are used to measure luminance unit. The purpose of the work is to present established photometric systems and describe capability which is being applied at UME for the realization of calibrations of illuminance-meters and luminance-meters.
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Yusuf Çalkin, Yusuf Çalkin, A. K. Turkoglu, A. K. Turkoglu, Ferhat Sametoglu, Ferhat Sametoglu, "Detector-based luminance and illuminance measurements at UME", Proc. SPIE 5948, Photonics Applications in Industry and Research IV, 59481O (6 October 2005); doi: 10.1117/12.622809; https://doi.org/10.1117/12.622809
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