The Fraunhofer Institute for Applied Optics and Precision Engineering (IOF), also referred to as the Fraunhofer IOF, is an institute of the Fraunhofer Society for the Advancement of Applied Research (FHG). The institute is based in Jena. Its activities are attributed to applied research and development in the branch of natural sciences in the field of optics and precision engineering. The institute was founded in 1992.