Di. Milburn et Kgt. Hollands, SOLAR TRANSMITTANCE MEASUREMENTS USING AN INTEGRATING SPHERE WITH BROAD AREA IRRADIATION, Solar energy, 52(6), 1994, pp. 497-507
This paper examines the broad area irradiation method for measuring so
lar transmittance of advanced glazing materials. It shows that the app
arent transmittance measured by this method is the product of the true
transmittance, and two other factors related to the reflectance of th
e sample. Not accounting for these other factors may lead to errors. M
ethods for reducing and correcting these errors are discussed and meas
urements are presented that illustrate these errors. It is shown that
the broad area irradiation technique can be used with appropriate corr
ections to accurately measure transmittance.