The use of UV LEDs is increasing rapidly as they show advantages over traditional arc lamps: by emitting radiation only at the required wavelength range, reduce unnecessary thermal heating, and having a reduced footprint and lower energy consumption, these light sources improve production yields and reduce costs in numerous industrial fields. Moreover, UV-A LED sources are much safer to the human skin and eye compared to arc lamps, and do not contain hazardous materials.
The most important UV-related industrial application is UV curing, also called photopolymerization, in which high-energy photons absorbed in a liquid alter its chemical properties and solidify it, usually in a few seconds . UV-A Irradiance and dosage measurement is essential for obtaining repeatable and controlled UV curing processes. UV curing was adapted for various printing, coating, decorating, bonding, and stereolithography applications, as it allows drying of polymers, paints, and other UV-responsive materials (adhesives, inks, epoxy, coatings). UV curing is also used in the assembly of a variety of products and materials - 2D printing, 3D Printing (additive manufacturing). Several bonding techniques can also be achieved by UV curing: among them are lens and optical bonding, fiber optics manufacturing, electronic component ruggedization, wire tacking, adhesive UV tapes in semiconductors processing. Finally - UV curing is also used in medical applications, especially in the dental field.
Other than curing, UV-A Irradiance and dosage measurement of UV light is also necessary for non-destructing testing, machine vision applications, and analytics tools (forensics, counterfeit detection of banknotes & document).