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4.5 Polarization & Spectroscopy

In addition to standard imaging, the FOC can also perform polarization imaging, objective prism spectroscopy, and long-slit spectroscopy.

Three polarizer filters available on the f/96 camera, with pass directions of 0 degrees, 60 degrees and 120 degrees, provide a straight-through, low reflection-angle system which introduces less than 2% intrinsic polarization.
Two objective prism filters on the f/96 camera allow observers to obtain high-throughput spectra at low to medium resolution from 1700Å to 6000Å (near-UV prism) and 1150Å to 6000Å (far-UV prism).
The f/48 camera possesses a long-slit spectroscopy facility with a resolving power of ~1150 in 4 orders, covering 3600-5400 Å, 1800-2700 Å, 1200-1800Å, and 1150-1350 Å.

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