MIRA status report: recent progress of MIRA-I.2 and future plans

We propose a polarimetric technique for a stellar interferometer that uses two birefringent retarders inserted into each arm of the interferometer. The retarders shift the interference fringes of the two orthogonal polarizations to opposite directions along an optical path difference (OPD), which enables us to measure the polarized fringe visibilities separately. Laboratory demonstrations were carried out using quartz retarders with a thickness of 1.124 mm, and the separation of the interferometric fringes of +/-10 microm along the OPD was observed. We discuss a calibration method for the acquired fringes to obtain reliable estimations of polarized fringe visibilities. We also discuss feasibility of the proposed technique for the Mitaka optical InfraRed Array (MIRA-I.2).

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Polarimetric stellar interferometry by use of birefringent retarders

Murakami

Ohishi

Nishikawa

et al. 2009

Appl. Opt.

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MIRA status report: recent progress of MIRA-I.2 and future plans

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Polarimetric stellar interferometry by use of birefringent retarders

Polarimetric stellar interferometry by use of birefringent retarders

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