DISCREPANCIES IN THE MEASUREMENT OF SPECTRAL SOURCES |
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| Authors: | Robert M Sayre Lorraine H Kligman |
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| Institution: | Physics Department, Memphis State University, Memphis, TN 38152, USA and Rapid Precision Testing Laboratories, Cordova TN 38018–1342, USA;Dermatology Department, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA |
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| Abstract: | Abstract— Comparison of spectroradiometric and meter measurements of a series of ultraviolet radiation sources indicates that a wide divergence between readings can occur. We found that with a xenon are filtered as a solar simulator producing UV-A (320–400 nm) and UV-B (290–320 nm) radiation, the meter can either over-or underestimate the emission of the source when different cutoff filters are used. The most severe discrepancy appears with the UV-B meter reading, although the UV-A reading can also be problematic. Meters should be calibrated against the specific sources they will be used to measure. |
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