DETECTOR-BASED CALIBRATION METHOD FOR HIGH-ACCURACY SOLAR UV MEASUREMENTS

摘要

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. [References: 12]