The group's principal activities are to design, manufacture and market optical, electro-optical components, devices, and materials for infrared, near infrared, visible light lasers and instrumentation. the group is also into manufacturing, marketing of x-ray, gamma-ray detectors, components for medical, industrial, environmental, scientific instruments, production of micro-fabricated and micro-assembled devices for telecommunications. the group is also into the development of single crystal growth and fabrication of silicon carbide substrates for use in the manufacture of high temperature electronics. the group acquired litton systems inc and silicon carbide group in fiscal 2002. optical and electro-optical components accounted for 66% of fiscal 2002 revenues; Laser power, 28% and radiation detectors, 6%.