Polarimetric characterization of segmented mirrors

Bibcode
2022ApOpt..61.4908P
DOI
10.1364/AO.460201
Collados, M.; Manso Sainz, R.; Asensio Ramos, A.; Pastor Yabar, A.
Bibliographical reference

Applied Optics

Advertised on:
6
2022
Journal
Applied Optics
Number of authors
4
IAC number of authors
2
Citations
1
Refereed citations
1
Description
We study the impact of the loss of axial symmetry around the optical axis on the polarimetric properties of a telescope with segmented primary mirror when each segment is present in a different aging stage. The different oxidation stage of each segment as they are substituted in time leads to non-negligible crosstalk terms. This effect is wavelength dependent and it is mainly determined by the properties of the reflecting material. For an aluminum coating, the worst polarimetric behavior due to oxidation is found for the blue part of the visible. Contrarily, dust -- as modeled in this work -- does not significantly change the polarimetric behavior of the optical system . Depending on the telescope, there might be segment substitution sequences that strongly attenuate this instrumental polarization.
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Type
Refereed
Solar Physics (FS)

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