1 Ocak 2004 Dergi makalesi Açık Erişim

Samedov, F; Durak, M

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    <subfield code="a">Luminous flux calibration facility with an integrating sphere has been installed at the National Metrology Institute of Turkey (UME) in order to realize lumen. A LabView-based computer -controlled electrical system has been developed to operate light sources and to control electrical parameters. Owing to the corrections of the sphere system, inner coating reflectance, spatial non-uniformity, self-absorption factor and interior temperature variations have been characterized. The overall uncertainty in luminous flux measurement has been determined, with an uncertainty of 1.14% (k = 2) in the range between 5-5000 lm.</subfield>
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    <subfield code="a">Realization of luminous flux unit lumen at National Metrology Institute of Turkey (UME)</subfield>
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