A radiometer is an important tool in the light-curing process. Below are a few of the benefits of using a radiometer to monitor your light-curing process.
Benefit 1: Maintain a Reliable Light-Curing Process
UV-curing bulbs, lightguides, and reflectors can deteriorate over time, causing less UV energy to reach the cure surface and result in incomplete cures. As the UV energy decreases, adjustments in the process must be made to maintain product quality. It can be difficult to determine when the UV energy is decreasing. UV wavelengths of light are too short to seen visually with just one’s eyes, requiring the use of a radiometer to monitor intensity. Radiometers measure the intensity and/or energy associated with light of specified wavelengths. A radiometer can measure whether a light-curing system is providing intensity above the minimum or “bulb change” intensity. A radiometer is to a light-curing process what a thermometer is to an oven-curing process.
Benefit 2: Provide a Safer Work Environment
A radiometer can also be used to determine if any stray UV light is reaching operators or bystanders. This can help insure a safer, more worker-friendly light-curing process. Dymax’s ACCU-CAL™ radiometers can measure the intensity of stray or reflected energy to as little as
1 mW/cm2. It is recommended that workers do not exceed 1 mW/cm2 of UVA exposure.
Benefit 3: Measure Transmission Rates Through Substrates
A radiometer can be used to measure the transmission rates of various wavelengths through substrates that sometimes absorb various frequencies of energy. To assure an effective curing process it is critical to measure the light intensity reaching the cure site below any intervening substrate.