II-VI Inc was incorporated in Pennsylvania in 1971. The Company develops, manufactures and markets high-technology materials and derivative precision components and products for precision use in industrial, military, optical communication, photovoltaic, medical and aerospace applications. The Company consists of four reportable segments: Infrared Optics; Near-Infrared Optics; Military & Materials; and Advanced Products Group (formerly Compound Semiconductor Group). The Company develops, manufactures, refines and markets infrared and near-infrared laser optical elements, military infrared optical components and assemblies, optical communications components and modules, selenium, tellurium and rare earth metals and chemicals, thermoelectric cooling and power generation systems and single crystal silicon carbide substrates. Its products are supplied to manufacturers and users in a wide variety of markets including industrial, military, optical communications, photovoltaic and medical and are deployed in applications that it believe reduce the cost and improve the performance of laser cutting, welding and marking operations; reduce the cost and improve the reliability of military-related products; reduce the cost and improve the operations of optical communication products; reduce the cost and improve the operations of photovoltaic products; reduce the cost and improve the reliability of medical procedures; and reduce the cost and improve the performance of cooling and power generation solutions. Its U.S. production operations are located in Pennsylvania, Florida, California, New Jersey, Texas, Mississippi and Massachusetts, and its non-U.S. production operations are based in China, Singapore, Vietnam, the Philippines, Germany and Australia. Competitors producing infrared laser optics include Sumitomo Electric Industries, Ltd. and Newport Corporation. Competing producers of automated equipment and laser material processing tools to deliver high power one-micron laser systems include Optoskand AB and Precitec, Inc. competing producers of YAG materials and optics include Northrop Grumman Corporation and CVI Melles Griot. Competing producers of optical component and optics products include O-Net Communications, OPLINK Communication and Axsun. Competing producers of infrared optics for military applications include DRS Technologies, Inc., Goodrich Corporation and in-house fabrication and thin film coating capabilities of major military customers. Competing producers of selenium and tellurium metals and other chemicals include Umicore and Vital Chemical. Competing producers of TEMs include Komatsu, Ltd., Laird Technologies and Ferrotec Corporation. Competing producers of single crystal SiC substrates include Cree, Inc., Dow Corning Corporation, Nippon Steel, Bridgestone and SiCrystal AG. As a global company, it is subject to taxation in the United States and various other countries and jurisdictions.