Measuring the Output of UV Light Emitting Diodes (LEDs)

摘要

As UV lamp technology changes, so must the tools we use. The evolution of UV LEDs to cure inks, coatings and adhesives is having an effect on UV measurement equipment and technique. UV LEDs are narrow bandwidth sources with typical emission in the 365-405 nm region. Contrasted to medium pressure UV microwave and arc lamps, which emit across a broad spectrum, UV LEDs have high output in a very limited spectral region. This paper will address some of the confusion arising from the specification and measurement of UV LED sources. The paper will address the need for correct filtering, the complications posed by LED optics and other characteristics of LEDs that has led to the development of new radiometers and the establishment of a new spectral band designation, UVA2, for these devices.