Custom fabricated sapphire optical domes that extend the viewing angle of vision systems and deflect sand and dirt traveling at high speeds are available from Meller Optics, Inc. of Providence, Rhode Island. Meller Sapphire Optical Domes feature a 160 degree maximum viewing angle to extend vision system visibility while providing a hard, rounded surface that can deflect high-speed dirt, sand, and debris better than flat windows. Manufactured in sizes up to 4” O.D., they provide up to 85% transmission uncoated in the UV to IR, with up to 99% when A/R coated in two sides. Ideally suited for drones, missile guidance systems, and outboard subsea applications, Meller Optical Domes exhibit Mohs 9 hardness which is second only to diamond and can withstand temps. to 1000°C and pressure to 10K psi. Surface accuracy is to > 1 fringe @ 633 nm and finishes to 20-10 scratch-dig per MIL-PRF-13830 and precise edge steps and mounting profiles are offered. Meller Sapphire Optical Domes are priced depending upon configuration and quantity. Price quotations are available upon request.