High performance polarizers can be obtained with optimized coatings. Interference coatings can tune polarizers at the spectral line(s) of interest for solar and stellar physics. Polarizing beamsplitters consist in polarizers that separate one polarization component by reflection and the other by transmission, which enables observing the two polarization components simultaneously with a single polarizer. They involve the benefit of a higher efficiency in collection of polarization data due to the use of a single polarizer for the two polarization components and they may also facilitate a simplified design for a space polarimeter. We present results on polarizing beamsplitters tuned either at 121.6 nm or at the pair of 155 and 280 nm spectral lines.
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Juan I. Larruquert, A. Marco Malvezzi, Luis Rodríguez-de Marcos, Angelo Giglia, Nuria Gutiérrez-Luna, Lucía Espinosa-Yáñez, Carlos Honrado-Benítez, José A. Aznárez, Giuseppe Massone, Gerardo Capobianco, Silvano Fineschi, Stefano Nannarone, "Polarizers tuned at key far-UV spectral lines for space instrumentation," Proc. SPIE 10235, EUV and X-ray Optics: Synergy between Laboratory and Space V, 102350K (31 May 2017);