Meller Optics Inc. in Providence, R.I., is introducing sapphire and spinel optical domes that provide front surface protection to electronic sensors and detectors in harsh aerospace and industrial environments. Meller sapphire domes have 160-degree maximum included angles to extend the viewing angles of cameras, sensors, detectors, and other devices and provide extreme physical protection in harsh environments.
Capable of withstanding moving sand, dirt, water, and chemicals, they can be custom engineered with precise edge steps and profiles for mounting purposes. The domes provide as much as 85 percent transmission uncoated in the ultraviolet to infrared light spectra with as much as 99 percent when A/R coated on two sides. Meller sapphire optical domes exhibit Moh 9 hardness (second only to diamond) and can be supplied in sizes as large as four inches O.D. with surface finishes to 20-10 scratch-dig. Optical domes can also be made in sizes as large as six inches O.D. from spinel, which exhibits Moh 8 hardness.