Development and measurement of a 365 NM UV LED irradiance source

• Main Authors: Tiecheng Li, Fangsheng Lin, Muyao Ji, Biyong Huang, Weihai Cheng, Leibing Shi, Ming Xia, Liping Wang
• Format: Article
• Language: English
• Published: Elsevier 2021-12-01
• Series: Measurement: Sensors
• Subjects: UV LED; Irradiance source; Integrating sphere; Calibration
• Online Access: http://www.sciencedirect.com/science/article/pii/S2665917421001161

UV LED has been widely used in various fields such as medical disinfection and biochemical detection, especially in UV curing. Compared with traditional high-voltage mercury lamp, UV LED shows large differences both in the spectral power distribution and irradiance, which may cause up to 20% error in calibration. A 365 nm UV LED source has been developed and measured, which is made of UV LEDs, temperature control module, integrating sphere, circuit and monitoring module. The experiment results indicate that the irradiance of about 884 mW/cm2 meets the actual requirements of the curing industry, and the stability of 1.0% (15 min) and uniformity of 1.6% are in compliance with the calibration regulation.