Abstract
We have developed and characterized a measurement setup for measuring the spectral irradiance responsivity s(λ) of broadband UV detectors. The setup consists of a single grating monochromator and a powerful (450W) Xe source to maximize the output power and thus enable spectral measurements with broadband detectors, whose sensitivity is typically low. Commercial UVA and UVB detectors were characterized with the setup. The results of the UVA detector were verified with a spectroradiometric calibration, and the results of the two methods agreed within 1.2%. The uncertainties (coverage factor k=2) were 2.0% [method utilizing s(λ)] and 3.1% (spectroradiometric method). Also the applicability of a correction factor for transforming calibration results between light sources was tested, and the obtained correction agreed with measurement results.
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