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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 21 — Jul. 20, 2006
  • pp: 5168–5184

Systematic effects induced by a flat isotropic dielectric slab

Claudio Macculi, Mario Zannoni, Oscar Antonio Peverini, Ettore Carretti, Riccardo Tascone, and Stefano Cortiglioni  »View Author Affiliations


Applied Optics, Vol. 45, Issue 21, pp. 5168-5184 (2006)
http://dx.doi.org/10.1364/AO.45.005168


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Abstract

The instrumental polarization induced by a flat isotropic dielectric slab in microwave frequencies is discussed. We find that, in spite of its isotropic nature, such a dielectric can produce spurious polarization either by transmitting incoming anisotropic diffuse radiation or emitting when it is thermally inhomogeneous. We present evaluations of instrumental polarization generated by materials usually adopted in radio astronomy, by using the Mueller matrix formalism. As an application, results for different slabs in front of a 32   GHz receiver are discussed. Such results are based on measurements of their complex dielectric constants. We evaluate that a 0 .33   cm thick Teflon slab introduces negligible spurious polarization ( < 2 .6 × 10 5 in transmission and < 6 × 10 7 in emission), even minimizing the leakage ( < 10 8 from Q to U Stokes parameters, and vice versa) and the depolarization ( 1.3 × 10 3 ) .

© 2006 Optical Society of America

OCIS Codes
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(230.5440) Optical devices : Polarization-selective devices
(350.1260) Other areas of optics : Astronomical optics
(350.4010) Other areas of optics : Microwaves
(350.5500) Other areas of optics : Propagation

ToC Category:
Polarization-Sensitive Devices

History
Original Manuscript: September 23, 2005
Revised Manuscript: January 16, 2006
Manuscript Accepted: January 25, 2006

Citation
Claudio Macculi, Mario Zannoni, Oscar Antonio Peverini, Ettore Carretti, Riccardo Tascone, and Stefano Cortiglioni, "Systematic effects induced by a flat isotropic dielectric slab," Appl. Opt. 45, 5168-5184 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-21-5168

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