A forward-modeling technique extracts spatially resolved cavity separation, reflectivities, and prefilter curves for dual-etalon FPI systems from quiet-Sun observations without hardware changes, yielding RMS cavity variation below 2 nm and reflectivity variations of 0.3-0.4% for the CRISP2 camera.
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Characterization of telecentric dual-etalon Fabry-P\'erot systems from observational data. Properties of the CRISP2 instrument at the Swedish 1-m Solar Telescope
A forward-modeling technique extracts spatially resolved cavity separation, reflectivities, and prefilter curves for dual-etalon FPI systems from quiet-Sun observations without hardware changes, yielding RMS cavity variation below 2 nm and reflectivity variations of 0.3-0.4% for the CRISP2 camera.