On the coating line, a sluggish or uneven dryer doesn’t just drag down throughput. It opens the door to optical defects and can quietly seed stress fractures that show up later—during tempering, during bending. We built these optical lens coating dryers to keep the thermal field tight and repeatable, so the coating cures without baking unwanted thermal stress into the glass. What matters, technically We match near-infrared (NIR) emitters to the coating’s absorption band, hitting it with rapid energy input and low thermal mass. That gives you a controlled temperature rise without leaning too hard on convection heating, which can ruffle thin films. Output adjusts to line speed, and the spectral profile stays stable over long runs. In practice, you get consistent drying from the first lens to the thousandth, with setpoints you can repeat—exactly what you need for process control in steps that sit next to annealing. Why it works on the line On high-throughput glass processing, time is yield. These dryers cut drying time while keeping coating integrity intact, so the next stage—whether EVA/SGP/PVB lamination, insulating glass sealing, or final inspection—starts with surfaces that behave. The uniform thermal profile keeps localized overheating in check, which helps prevent micro-cracks that can grow during stress relief or later thermal treatments. Energy use drops because the energy goes where it’s needed, and the unit fits cleanly into existing coater layouts. Here are the gotchas NIR drying is sensitive to part geometry and emissivity. Thick substrates or heavily curved shapes can throw shadows, so you may need a tailored emitter layout. Retrofit is straightforward, but confirm the electrical interface and cooling up front. And don’t default to max power—set the profile to the coating chemistry and glass thickness, then lock it in.