Sapphire lens element

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Custom fabricated sapphire optics that resist scratching, high pressures, and high temperatures found in harsh environments in which many robotics function have been introduced by Meller Optics, Inc. of Providence, RI. Meller Sapphire Optics can be supplied as lenses, flat windows, and domes custom fabricated in sizes from 3/8” to 4” dia. and varying wall thicknesses with ±0.001” tolerances. Featuring Mohs 9 hardness which is second only to diamond, they are impervious to water, most acids and chemicals including fluorine to 300°C, abrasion caused by fast moving particulates, temperatures to 1,000°C, and pressures to 10,000 psi. Ideal for applications from UHV to 10,000 psi and cryogenic to 1,000°C, Meller Sapphire Optics are offered with various coatings to meet specific transmission requirements. Surface finishes can be held from 60-40 to 40-20 scratch-dig, flatness held to 0.5 fringes of HeNe, and parallelism from 20 to 2 arc/secs.; depending upon configuration. Beveled and polished edges, and other modifications to OEM specifications can be provided.