Spectral UV Irradiance Measurements with a Double Monochromator System and with a Combined Monochromator-Spectrograph Measuring Instrument

摘要

Critical UV applications such as disinfection and dermatological treatments call for the need for accurateUV spectral irradiation measurements. Due to poor stray light rejection, single monochromators andspectrographs are not able to provide a satisfying accuracy. For critical measurements, a scanningdouble monochromator offers a much better solution. At the Light&Lighting Laboratory, a combinationof a single monochromator with a large bandpass and a spectrograph has been developed and it hasbeen shown that this apparatus has stray light rejection characteristics even better than those obtainedwith a commercially available high-accuracy scanning UV-VIS double monochromator system. In thispaper, the UV irradiance of several light sources is determined using both instruments. The experimentalspectra and the stray light contributions are discussed.