The JWST Tunable Filter Imager (TFI) Coronagraph

Details The JWST Tunable Filter Imager (TFI) Coronagraph The JWST Tunable Filter Imager (TFI) Coronagraph

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007lyot.confe..49d&link_type=abstract

Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21s

Computer Science

Performance

Scientific paper

The Fine Guider Sensor (FGS) of the James Webb Space Telescope (JWST) a tunable filter imager (TFI) with a spectral resolution of ~100 covering the 1.5 to 5 micron wavelength range. A set of 4 reflective Gaussian occulting spots / bars on the pick-off mirror of the instrument along with four apodizing masks located in the pupil wheel enable coronagraphic operation. Each coronagraphic field covers a square field of view of 20'x20'. This paper presents the coronagraph design of TFI and its performance. The combined coronagraphic and differential spectral imaging capabilities of the TFI coronagraph constitute a powerful tool for detecting and characterizing exoplanets with JWST.

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