Abstract

A spectral radiant power scale based on a synchrotron radiation has been established for ultraviolet and vacuum ultraviolet radiations. The absolute spectral radiant power of an under-test light source was determined by comparing the radiant power of the under-test source with that of the synchrotron radiation by using an optical system. Polarization state of synchrotron radiation is extremely different from that of the under-test source, and hence we introduced a special polarimeter for evaluating the polarization dependence of the optical system. We determined the absolute spectral radiant power of an under-test light source and evaluated the uncertainty of it.

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