These sapphire optics offer a Mohs 9 hardness rating, placing them just behind diamond in durability. Because they remain impervious to high-velocity particles and harsh chemicals—including fluorine at temperatures up to 300°C—they serve as reliable barriers for vacuum systems and furnace inspection ports. Meller Optics fabricates these components in diameters from 0.25 to 6.0 inches, with thicknesses reaching up to 1.5 inches.
In section Releases
Meller Optics Debuts Sapphire Windows for Extreme Thermal Environments
Engineers facing extreme thermal gradients now have a new material option as Providence-based Meller Optics introduces custom-fabricated sapphire windows. Engineered to withstand temperatures ranging from -200°C to +1,600°C, these components are designed for high-stakes environments including missile seeker heads, aerospace instrumentation, and semiconductor manufacturing chambers.
Customization options include complex geometries such as stepped edges, elliptical shaping, and integrated mounting features like holes or wedges. Precision is maintained through surface finishes ranging from 60-40 to 40-20 scratch-dig, with flatness held to 0.5 fringes of HeNe and parallelism as tight as 2 arc/seconds. The company offers anti-reflective coatings and specific mounting configurations tailored to individual client requirements, with pricing provided upon direct inquiry.
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