ABSTRACT
Introduction 843
Methods 845
Instrumentation 845
Calibration Procedures 845
Measurement Procedures 845
Measurement Uncertainty 846
Results 846
Discussion 848
Conclusion 850
References 851
INTRODUCTION
In 1978, the US FDA published a report and monograph on sunscreen product
testing and labeling (1). This monograph established that a solar simulator
would be a source having a continuous emission spectrum from 290 to 400 nm
and be filtered for a solar zenith angle of 108 and have less than 1% of its
energy contributed by wavelengths shorter than 290 nm. In addition, to avoid
purported thermal problems, they also required that the solar simulator could
not have more than 5% of its energy contributed by wavelengths longer than
400 nm. The beam uniformity is required to be within 10%. Specifically, latter
monographs have recommended that a solar simulator requires periodic
remeasurement with a calibrated spectroradiometer to insure the proper spectral
distribution (2-4).
