illuminance measurement
1.Abstract: The measurement method of the polarization grade for the source and depolarization and the concept of the polarization error for the illuminance meter are described.
2.Combining the publication of CIE, foreign industrial standards and the latest national regula- tion of metrological verification, the effects of errors of indication, spectral responsively, direc- tional response and some other main errors on the measurement accuracy of illuminance are re- ported and the quantitative relation between different characterizing methods are compared by ex- amples in this paper.
