The „Visible Tunable Filter“(VTF) is a spectro-polarimeter that is presently being built at KIS, and will be installed at the US-American Daniel K. Inouye Solar Telescope as a focal plane instrument in about two years from now. The VTF will be used to measure magnetic fields with high spatial resolution on the Sun. To this end, the VTF measures precisely the state and the degree of polarization of the incoming solar light.

As from now, the name of the institute is Leibniz-Institut für Sonnenphysik (KIS) (Leibniz Institute for Solar Physics (KIS). This name change was agreed to highlight the institute’s membership in the Leibniz Association.