In partnership with Artemis Optical, anti-reflection coating of GLS chalcogenide glass has been demonstrated. This reduces reflections from GLS glass surfaces to <1%, significantly lower than the ~28% reflection from the uncoated glass that is a result of its high refractive index. with Testing of the coated optics, shows them passing industrial standard adhesion, abrasion and solubility tests without problem and passing humidity and temperature environmental testing.
Initial test were for unoptimized coatings designed for the 3-5micron waveband. Please contact us to discuss collaborations on broader-band and lower loss coatings.