Sapphire windows are custom fabricated to specification in a wide range of sizes by Meller Optics. Photo courtesy of Meller Optics.

Sapphire windows are custom fabricated to specification in a wide range of sizes by Meller Optics. Photo courtesy of Meller Optics.

PROVIDENCE, R.I.—Meller Optics Inc., has created custom sapphire windows that can withstand extreme pressures and the rigors of harsh subsea applications while providing optimum visibility, Meller said in a press release.

Meller Sapphire Windows are reported to be well-suited for subsea UAV applications requiring a clear, hard optical material that can withstand high pressures to 10,000 psi and resist salt water, chemicals, and fast moving particles. With a Mohs 9 hardness that is second only to diamond, the sapphire windows can be custom manufactured to specification in a wide range of sizes with varying thicknesses, mounting profiles, steps, and edge treatments to assure a reliable fit and seal.

Meller Sapphire Windows can be made in sizes from ¼-inch to 10-inch diameter and from ½mm to 1 inch thick, depending upon configuration, and can include A/R coatings. Other sapphire optics include domes and lenses with focal lengths from ¾ inch to 1,000 mm or greater, and surface finishes from 60-40 to 40-20 scratch-dig, depending upon size and configuration.

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