Design and Performance Analysis of a Highly Efficient Polychromatic Full-Stokes Polarization Modulator for the CRISP Imaging Spectrometer

We present the design and performance of a polychromatic polarization modulator for CRisp Imaging SpectroPolarimeter (CRISP) Fabry-Perot tunable narrow-band imaging spectropolarimer at Swedish 1-m Solar Telescope (SST). discuss process in depth, compare two possible designs through tolerance analysis, investigate thermal sensitivity selected design. The trade-offs procedures described this paper are generally applicable development broadband modulators. was built has been operational since 2015. Its measured is close to optimal between 500 900~nm, differences as-built largely understood. show some example data, briefly review scientific work that used data from SST/CRISP modulator.