Gooch & Housego PLC engages in the manufacture and sale of acousto-optics, electro-optics, fiber optics, and precision optics and systems in the United Kingdom, North America, Europe, the Asia Pacific, and internationally. It operates through Aerospace & Defence, Life Sciences/Bio-photonics, and Industrial segments. It offers acousto-optic products, such as acousto-optic modulators, deflectors, frequency shifters, model lockers, multi-channel modulators, pulse pickers, Q-switches, tunable filters, and RF drivers; crystal optics, including crystals and nonlinear optics, lithium niobate wafers, and periodically-poled lithium niobite; and electro-optics, such as pockels cells, lithium niobate Q-switches, and pockels cell drivers. It also provides fiber optics, such as DFB lasers and modules, fiber coupled pump lasers, high speed detectors and power combiners, benchtop laser controllers, polarization-maintaining and single-mode fused fiber couplers, polarization diverse receivers, ruggedized and wideband couplers, planar lightwave circuits, and fiber coupled modulators; precision optics, including beamsplitters, corner cubes, optical domes, optical windows and flats, precision lenses, precision mirrors, precision prisms, ring laser gyroscope components, synchrotron mirrors, waveplates, Hy-Per bond, magnetoheological finishing, optical coatings, single point diamond turning, and superpolishing; lens systems, such as broadband, LWIR, MWIR, and Vis-SWIR lens systems; and vision systems for armored fighting vehicles, including embedded image periscope and sighting systems, enhanced drivers vision system, sabre commander/gunner sights, spares and repairs, spectre camera pack, and unity vision periscopes. The company offers its products for use in semiconductor and microelectronic, metrology, telecommunications, and scientific research industries; and mission-critical applications. Gooch & Housego plc was founded in 1948 and is headquartered in Ilminster, the United Kingdom.