AR Coatings

Antireflective or anti-reflection (AR) coating is a specialized optical treatment applied to the surfaces of lenses and various optical devices to minimize reflection. By reducing reflection, the coating enhances system efficiency by minimizing light loss. In intricate systems like telescopes, decreased reflections not only enhance image contrast by minimizing stray light but are particularly crucial in planetary astronomy. In other contexts, the primary advantage lies in reflection elimination, such as coating eyeglass lenses to enhance the wearer's eye visibility or reducing glint from covert viewers' binoculars or telescopic sights.

Single Wavelength AR Coatings

The most basic form of interference AR coating comprises a solitary quarter-wave layer of transparent material, with its refractive index being the square root of the substrate's refractive index. Theoretically, this configuration results in zero reflectance at the central wavelength and reduced reflectance across a wide range of wavelengths surrounding the center.

Dual Wavelength AR Coatings

Broadband AR Coatings