Anti-reflection coatings for infrared optics
AssigneeCorning Incorporated
InventorsBruce Gardiner Aitken, Jason Scott Ballou, Steven George Benson, Leonard Gerard Wamboldt
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Abstract
An optical element that features high transmission and low reflectivity at infrared wavelengths is described. The optical element includes a substrate, an adhesion layer on the substrate, and an anti-reflection coating. Substrates include chalcogenide glasses, InAs, and GaAs. Adhesion layers include Se, ZnSe, Ga2Se3, Bi2Se3, In2Se3, ZnS, Ga2S3 and In2S3. Anti-reflection coatings include one or more layers of DLC (diamond-like carbon), ZnS, ZnSe, Ge, Si, HfO2, Bi2O3, GdF3, YbF3, In2Se3, and YF3. The optical elements show high durability and good adhesion when subjected to thermal shocks, temperature cycling, abrasion, and humidity.
Claims20
An optical element comprising:
- a substrate, said substrate comprising a material selected from the group consisting of chalcogenide glass, InAs, and GaAs;
- an adhesion layer on said substrate, said adhesion layer comprising a material selected from the group consisting of Si, Ge, a chalcogenide material, and a pnictide material;
- and
- an anti-reflection coating on said adhesion layer, said anti-reflection coating comprising a first layer, said first layer comprising a material selected from the group consisting of ZnS, ZnSe, Ge, Si, HfO2, Bi2O3, GdF3, YbF3, YF3, In2Se3 and diamond-like carbon.
An optical element comprising:
- a substrate, said substrate comprising a material selected from the group consisting of chalcogenide glass, InAs, and GaAs;
- a first layer on said substrate, said first layer comprising Se;
- and
- a second layer on said first layer, said second layer comprising Ge.
Dependencies are inferred from the claim text.