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Detector‐Based Calibration Method for High‐Accuracy Solar UV Measurements
Author(s) -
Kärhä Petri,
Visuri Reijo,
Leszczynski Kirsti,
Manoochehrl Farshid,
Jokela Kari,
Ikonen Erkki
Publication year - 1996
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1996.tb02468.x
Subject(s) - spectroradiometer , radiometer , detector , calibration , irradiance , optics , remote sensing , responsivity , filter (signal processing) , radiometry , interference filter , radiance , wavelength , optical filter , materials science , physics , reflectivity , computer science , quantum mechanics , computer vision , geology
A novel method for calibrating the absolute responsivity of solar UV spectroradiometers has been developed and tested. The method is based on calibrated filter radiometers constructed from a detector, a precision aperture, a band‐pass filter and devices for temperature stabilization. The filter radiometers utilize a trap detector with very low reflectance. The filter and the detector can therefore be characterized separately. As an example the detector‐based calibration is compared at 312 nm wavelength with lamp‐based calibration by measuring the irradiance of a deuterium lamp with both the filter radiometer and the lamp‐calibrated spectroradiometer. The agreement between the results is at the level of 1%, well within the estimated uncertainties of both methods.