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Uncertainties in source distribution temperature and correlated colour temperature

J L Gardner

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Uncertainties in the distribution temperature (DT) and correlated colour temperature are estimated for common sources and typical measurement uncertainties of a spectral transfer from a reference lamp. Uncertainty sensitivity coefficients for both parameters in terms of measured values of spectral irradiance are derived using a generalized matrix inverse. The uncertainty values are compared with differences in the source temperature parameters. DT is calculated using the CIE definition; shifts in DT due to the alternative of a direct fit of Planck's distribution, and to including weights in the process, are compared with the estimated uncertainties.


PACS

06.20.Dk Measurement and error theory

07.20.Dt Thermometers

Subjects

Instrumentation and measurement

Dates

Issue 5 (October 2006)

Received 30 May 2006

Published 12 September 2006



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