This paper presents recent results of ongoing European Space Agency funded program of work aimed at developing large dielectric lenses suitable for future satellite missions, with a particular focus on requirements for CMB polarimetry. Two lens solutions are being investigated: (i) polymer lenses with broadband multi-layer antireflection coatings; (ii) silicon lenses with surface-structured anti-reflection coating represented by directly machined pyramidal features. For each solution, base materials with and without coatings have been optically characterized over a range of temperatures down to ∼10 K. Full lens solutions are under manufacture and will be tested in a bespoke large cryo-optical facility.
Broadband coated lens solutions for FIR-mm-wave instruments / Shitvov, A.; Savini, G.; Hargrave, P. C.; Ade, P. A. R.; Tucker, C. E.; Sudiwala, R. V.; Zhang, J.; Gudmundsson, J. E.; Winter, B.; Pisano, G.; Van Der Vorst, M.. - 12190:(2022). ( Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022 can ) [10.1117/12.2629968].
Broadband coated lens solutions for FIR-mm-wave instruments
Pisano G.;
2022
Abstract
This paper presents recent results of ongoing European Space Agency funded program of work aimed at developing large dielectric lenses suitable for future satellite missions, with a particular focus on requirements for CMB polarimetry. Two lens solutions are being investigated: (i) polymer lenses with broadband multi-layer antireflection coatings; (ii) silicon lenses with surface-structured anti-reflection coating represented by directly machined pyramidal features. For each solution, base materials with and without coatings have been optically characterized over a range of temperatures down to ∼10 K. Full lens solutions are under manufacture and will be tested in a bespoke large cryo-optical facility.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
