II-VI Incorporated develops, refines, manufactures, and markets materials and derivative precision components and products worldwide. The company offers various precision infrared optical components, such as lenses, output couplers, windows, and mirrors for use in CO2 lasers; one micron laser components, including modular laser processing heads for fiber lasers, YAG lasers, and other one-micron laser systems; and beam delivery systems. It also provides near-infrared optics comprising waveplates, polarizers, lenses, prisms, and mirrors for visible and near-infrared applications; coated windows, which are used as debris shields in the industrial and medical laser aftermarkets; fiber and micro optics, optical components and functional modules, and photonic crystal parts for optical communications; optical and photonic crystal parts for instrumentation and laser applications; diode pumped solid-state laser devices for optical instruments, display, and biotechnology; and components for UV filters used in early warning missile detection. In addition, it offers military infrared optics, including missile domes, electro-optical windows and subassemblies, imaging lenses, and other components; visible and crystalline materials, such as calcium and barium fluoride, and fused silica; material processing and refinement products, such as selenium and tellurium metals, and chemicals; thermoelectric modules (TEMs) comprising single-stage TEMs, micro TEMs, multi-stage TEMs, planar multi-stage TEMs, extended life thermocyclers, thermoelectric thermal reference sources, power generators, and thermoelectric assemblies for use in defense, medical equipment, industrial, and commercial applications; and silicon carbide products consisting of 6H-SiC semi-insulating and 4H-SiC conducting poly-types. The company markets its products through a direct sales force, and representatives and distributors. II-VI Incorporated was founded in 1971 and is headquartered in Saxonburg, Pennsylvania.

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