AR-Coated Windows

Windows are frequently used in optical systems to separate the environment in one part of the system from another, such as to seal vacuum or high-pressure cells.

Because the infrared transmitting material has a high index of refraction, an anti-reflection coating is typically applied to windows to minimize losses due to reflections.

For guidelines about calculating the proper thickness for a window to withstand a given pressure, see our Pressure Loading tutorial.

Below is the typical transmission of an AR coated, ZnSe window at 0° incidence:

AR Coated Windows Graph

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