Abstract
Abstract Since materials with the best infrared (IR) optical properties have low-fracture toughness, the need for protective coatings for IR windows and domes has been recognized for a long time. The emergence of technology for deposition of polycrystalline diamond (PCD) coatings by plasma-enhanced chemical vapor deposition (PECVD) presents an opportunity to provide protective coatings for IR materials. PECVD-produced thick PCD films have inherently high surface roughness. To produce high-quality diamond optics, polishing will be required. Current results of polishing diamond films by mechanical and chemical methods will be shown. In specific applications, diamond optics will require hard, durable antireflection (AR)/antioxidation (AO) coatings. Characterization of refractory AR and AO coatings deposited on polycrystalline diamond films will be presented. Film morphology, stress, and effects of environmental testing will be discussed.
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