Anti-Reflection Coating Options for Optical Glass Windows in UV, VIS, and NIR Bands
Anti-Reflection Coating Options for Optical Glass Windows in UV, VIS, and NIR Bands Introduction Every optical system leaks performance at the glass-air interface. When light strikes an uncoated glass surface, roughly 4% reflects away at each boundary — that is 8% lost through a single window. For a multi-element system, the losses compound quickly. Anti-reflection coating options for optical glass windows in UV, VIS, and NIR bands exist precisely to solve this problem, but choosing the wrong one can cost you more than the coating itself. The challenge is that no single coating works across all three bands. A coating optimized for 1064 nm laser transmission will perform poorly at 355 nm. A broadband VIS coating may have unacceptable absorption in the UV. This tutorial walks through the decision process step by step, covering substrate selection, coating material families, environmental durability, and specification pitfalls. It is written for optical engineers, procurement speciali...