CASTECH Inc. engages in the research and development, production, and sale of crystal components, precision optical components, and laser devices primarily in China. The company offers laser crystals, nonlinear optical crystals, birefringent crystals, magneto-optical crystals, acousto-optic and electro-optical crystals and other functional crystal components, and oven and temperature controller accessories; and precision optics, including windows, reflectors, spherical lenses, cylindrical lenses, aspherical lenses, mirrors, non-cylindrical lenses, prisms, polarizers, wave plates, beam splitters, diffraction gratings, and other special optical components. It also provides magneto-optical devices, acousto-optical devices, electro-optical devices, drivers, optical switches, fiber optic transmission devices, and other products, as well as optical lenses, such as scanning field mirrors, beam expanders, etc.
