In this paper we analyze theoretically and experimentally the effect of tilt of the roof mirrors in a double pendulum Martin-Puplett Polarizing Interferometer (MPI), focusing on the polarization of the interfering beams. In principle, the tilt affects the efficiency and polarimetric properties of the interferometer. The case of a moderate resolution spectrometer is analysed in detail. Using the Stokes formalism we recover the analytical expressions for the orientation angle and the ellipticity of the beam reflected from a metallic surface, and we compute these quantities for the roof-mirror of a MPI. We find that the polarization rotation and depolarization are small. Using the Jones formalism we propagate their effect on the measured interferogram and spectrum, and demonstrate that the performance degradation is small compared to other systematic effects. (C) 2011 Elsevier B.V. All rights reserved.

On the effect of tilted roof reflectors in Martin-Puplett spectrometers / Schillaci, Alessandro; DE BERNARDIS, Paolo. - In: INFRARED PHYSICS & TECHNOLOGY. - ISSN 1350-4495. - STAMPA. - 55:1(2012), pp. 40-44. [10.1016/j.infrared.2011.08.007]

On the effect of tilted roof reflectors in Martin-Puplett spectrometers

SCHILLACI, ALESSANDRO;DE BERNARDIS, Paolo
2012

Abstract

In this paper we analyze theoretically and experimentally the effect of tilt of the roof mirrors in a double pendulum Martin-Puplett Polarizing Interferometer (MPI), focusing on the polarization of the interfering beams. In principle, the tilt affects the efficiency and polarimetric properties of the interferometer. The case of a moderate resolution spectrometer is analysed in detail. Using the Stokes formalism we recover the analytical expressions for the orientation angle and the ellipticity of the beam reflected from a metallic surface, and we compute these quantities for the roof-mirror of a MPI. We find that the polarization rotation and depolarization are small. Using the Jones formalism we propagate their effect on the measured interferogram and spectrum, and demonstrate that the performance degradation is small compared to other systematic effects. (C) 2011 Elsevier B.V. All rights reserved.
2012
cosmic microwave background; polarization; interferometers
01 Pubblicazione su rivista::01a Articolo in rivista
On the effect of tilted roof reflectors in Martin-Puplett spectrometers / Schillaci, Alessandro; DE BERNARDIS, Paolo. - In: INFRARED PHYSICS & TECHNOLOGY. - ISSN 1350-4495. - STAMPA. - 55:1(2012), pp. 40-44. [10.1016/j.infrared.2011.08.007]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/393277
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