Optics

Vacuum-coating material

July 1, 1996

Hafnium oxide can be used as a vacuum-coating material in multilayer thin-film stacks for high-power laser applications. The material has a refractive index of 1.8 and, when E-beam evaporated, forms hard and adherent films. The company offers 6-g tablets that are 99.99% pure hafnium oxide.

Aran Isles Chemicals, Rockport, MA

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