Calibration of absolute spectral radiance in UV and VUV regions by using synchrotron radiation

A synchrotron radiation was used as an absolute spectral radiance source in ultraviolet and vacuum ultraviolet regions and that scale was transferred to a deuterium lamp. A calibration system was used for comparing each spectral radiant flux. For the absolute calibration, it is important to determine the polarization dependence of the calibration system, because polarization of radiant flux is different between synchrotron radiation and the deuterium lamp. A polarimeter was introduced to determine the polarization dependence of our calibration system. The polarization dependence and that uncertainty of our system are calculated by using a new calculation method