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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 3 — Jan. 20, 2003
  • pp: 465–475

Neutral points of skylight polarization observed during the total eclipse on 11 August 1999

Gábor Horváth, István Pomozi, and József Gál  »View Author Affiliations


Applied Optics, Vol. 42, Issue 3, pp. 465-475 (2003)
http://dx.doi.org/10.1364/AO.42.000465


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Abstract

We report here on the observation of unpolarized (neutral) points in the sky during the total solar eclipse on 11 August 1999. Near the zenith a neutral point was observed at 450 nm at two different points of time during totality. Around this celestial point the distribution of the angle of polarization was heterogeneous: The electric field vectors on the one side were approximately perpendicular to those on the other side. At another moment of totality, near the zenith a local minimum of the degree of linear polarization occurred at 550 nm. Near the antisolar meridian, at a low elevation another two neutral points occurred at 450 nm at a certain moment during totality. Approximately at the position of these neutral points, at another moment of totality a local minimum of the degree of polarization occurred at 550 nm, whereas at 450 nm a neutral point was observed, around which the angle-of-polarization pattern was homogeneous: The electric field vectors were approximately horizontal on both sides of the neutral point.

© 2003 Optical Society of America

OCIS Codes
(010.3920) Atmospheric and oceanic optics : Meteorology
(100.0100) Image processing : Image processing
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(260.5430) Physical optics : Polarization
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(290.1310) Scattering : Atmospheric scattering

History
Original Manuscript: September 24, 2001
Revised Manuscript: January 10, 2002
Published: January 20, 2003

Citation
Gábor Horváth, István Pomozi, and József Gál, "Neutral points of skylight polarization observed during the total eclipse on 11 August 1999," Appl. Opt. 42, 465-475 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-3-465

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