FGS-TFI: Tunable Filter Imager

The FGS-TFI is a camera with a Fabry-Perot etalon in the optical train. It provides narrow band imaging over a nearly continuous range from 1.7 to 4.8 µm. The instantaneous observed bandpass will be R~ 100 with a limiting sensitivity of AB=25 at S/N=10 in 10,000 seconds. The FGS-TF will also have coronagraphic capabilities.