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Rhode Island-based Meller Optics has introduced sapphire optical domes to protect guidance systems and sensors in harsh environments. The domes feature Moh 9 hardness, second to diamond in terms of hardness, and provide up to 85 percent transmission uncoated in the UV and IR, and up to 99 percent when anti-reflective coated on two sides. They can withstand pressure to 10,000 psi, temperatures to 1000 degrees C, and are unaffected by fast moving dirt, sand, saltwater, and chemicals.
They are available in sizes up to 6 inches and can incorporate steps and profiles for mounting. For more information, visit www.melleroptics.com