VTF Instrument (IMAGE)
Caption
The Visible Tunable Filter’s (VTF) etalon, pictured here, consists of two reflecting plates, employed for measuring small differences in the flux of light for different wavelengths using the interference it produces. The size of the etalon, and its extreme high surface quality, are unique and unprecedented. The VTF was designed and built by the Institut für Sonnenphysik (KIS) in Freiburg, Germany, and has now been integrated into the Inouye Solar Telescope in Maui, HI - where it recently successfully saw first light.
Credit
KIS
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License
CC BY-NC-ND