Measurement of the reflection - Polarization pattern of the flat water surface under a clear sky at sunset

József Gál; Gábor Horváth; Viktor Benno Meyer-Rochow

doi:10.1016/S0034-4257(00)00196-6

Measurement of the reflection - Polarization pattern of the flat water surface under a clear sky at sunset

József Gál, Gábor Horváth, Viktor Benno Meyer-Rochow

Neuroscience

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Using 180° field of view imaging polarimetry, we measured the polarization characteristics (degree and angle of linear polarization) of the entire clear sunset sky and the reflection-polarization pattern of the flat water surface under this sky in order to test the validity of the earlier theoretical predictions made by Horváth, G. (1995) [Reflection-polarization patterns at flat water surfaces and their relevance for insect polarization vision. Journal of Theoretical Biology, 175, 27- 37] and Schwind, R., & Horváth, G. (1993) [Reflection-polarization pattern at water surfaces and correction of a common representation of the polarization pattern of the sky. Naturwissenschaften, 80, 82-83] on the fine structure of this reflection-polarization pattern. We compared the measured reflection-polarization pattern with the theoretical reflection-polarization patterns computed for single-scattering Rayleigh skylight and measured real skylight reflected from the flat water surface, the repolarization characteristics of which are described by the Fresnel theory. Analysing and comparing the theoretical and measured reflection-polarization patterns, we could establish that the earlier predictions of Horváth (1995) and Schwind and Horváth (1993) were correct. Contrary to other full-sky polarimeters, our 180° field of view rotating-analyzer imaging photopolarimeter is useful not only for sky measurements, but also for downward viewing polarimetry. It can be used in atmospheric optics as well as in biological investigations involving animal polarization vision and orientation on the basis of skylight polarization or water-surface-reflected polarized light.

Original language	English
Pages (from-to)	103-111
Number of pages	9
Journal	Remote Sensing of Environment
Volume	76
Issue number	1
DOIs	https://doi.org/10.1016/S0034-4257(00)00196-6
State	Published - 2001

Bibliographical note

Funding Information:
This work was supported by a 3-year János Bolyai postdoctoral research fellowship received by G. Horváth from the Hungarian Academy of Sciences, and by a 1-year doctoral research fellowship received by J. Gál from the George Soros Foundation (grant number: 230/2/878). The grants OTKA F-025826 and T-034981 received from the Hungarian National Science Foundation are gratefully acknowledged. Further financial support came from Oulu University received by V.B. Meyer-Rochow. Many thanks are due to Prof. Rüdiger Wehner (Zoologisches Institut, Universität Zürich, Switzerland), who lent his Nikon fisheye lens to us for the measurements in Oulu. Many thanks are due to three anonymous referees for their valuable comments and suggestions.

Keywords

180° Field of view imaging polarimetry
Air-water interface
Celestial polarization
Fresnel reflection
Reflection polarization of skylight
Sunset sky
Twilight

ASJC Scopus subject areas

Soil Science
Geology
Computers in Earth Sciences

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title = "Measurement of the reflection - Polarization pattern of the flat water surface under a clear sky at sunset",

abstract = "Using 180° field of view imaging polarimetry, we measured the polarization characteristics (degree and angle of linear polarization) of the entire clear sunset sky and the reflection-polarization pattern of the flat water surface under this sky in order to test the validity of the earlier theoretical predictions made by Horv{\'a}th, G. (1995) [Reflection-polarization patterns at flat water surfaces and their relevance for insect polarization vision. Journal of Theoretical Biology, 175, 27- 37] and Schwind, R., & Horv{\'a}th, G. (1993) [Reflection-polarization pattern at water surfaces and correction of a common representation of the polarization pattern of the sky. Naturwissenschaften, 80, 82-83] on the fine structure of this reflection-polarization pattern. We compared the measured reflection-polarization pattern with the theoretical reflection-polarization patterns computed for single-scattering Rayleigh skylight and measured real skylight reflected from the flat water surface, the repolarization characteristics of which are described by the Fresnel theory. Analysing and comparing the theoretical and measured reflection-polarization patterns, we could establish that the earlier predictions of Horv{\'a}th (1995) and Schwind and Horv{\'a}th (1993) were correct. Contrary to other full-sky polarimeters, our 180° field of view rotating-analyzer imaging photopolarimeter is useful not only for sky measurements, but also for downward viewing polarimetry. It can be used in atmospheric optics as well as in biological investigations involving animal polarization vision and orientation on the basis of skylight polarization or water-surface-reflected polarized light.",

keywords = "180° Field of view imaging polarimetry, Air-water interface, Celestial polarization, Fresnel reflection, Reflection polarization of skylight, Sunset sky, Twilight",

author = "J{\'o}zsef G{\'a}l and G{\'a}bor Horv{\'a}th and Meyer-Rochow, {Viktor Benno}",

note = "Funding Information: This work was supported by a 3-year J{\'a}nos Bolyai postdoctoral research fellowship received by G. Horv{\'a}th from the Hungarian Academy of Sciences, and by a 1-year doctoral research fellowship received by J. G{\'a}l from the George Soros Foundation (grant number: 230/2/878). The grants OTKA F-025826 and T-034981 received from the Hungarian National Science Foundation are gratefully acknowledged. Further financial support came from Oulu University received by V.B. Meyer-Rochow. Many thanks are due to Prof. R{\"u}diger Wehner (Zoologisches Institut, Universit{\"a}t Z{\"u}rich, Switzerland), who lent his Nikon fisheye lens to us for the measurements in Oulu. Many thanks are due to three anonymous referees for their valuable comments and suggestions.",

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doi = "10.1016/S0034-4257(00)00196-6",

language = "English",

volume = "76",

pages = "103--111",

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T1 - Measurement of the reflection - Polarization pattern of the flat water surface under a clear sky at sunset

AU - Gál, József

AU - Horváth, Gábor

AU - Meyer-Rochow, Viktor Benno

N1 - Funding Information: This work was supported by a 3-year János Bolyai postdoctoral research fellowship received by G. Horváth from the Hungarian Academy of Sciences, and by a 1-year doctoral research fellowship received by J. Gál from the George Soros Foundation (grant number: 230/2/878). The grants OTKA F-025826 and T-034981 received from the Hungarian National Science Foundation are gratefully acknowledged. Further financial support came from Oulu University received by V.B. Meyer-Rochow. Many thanks are due to Prof. Rüdiger Wehner (Zoologisches Institut, Universität Zürich, Switzerland), who lent his Nikon fisheye lens to us for the measurements in Oulu. Many thanks are due to three anonymous referees for their valuable comments and suggestions.

PY - 2001

Y1 - 2001

N2 - Using 180° field of view imaging polarimetry, we measured the polarization characteristics (degree and angle of linear polarization) of the entire clear sunset sky and the reflection-polarization pattern of the flat water surface under this sky in order to test the validity of the earlier theoretical predictions made by Horváth, G. (1995) [Reflection-polarization patterns at flat water surfaces and their relevance for insect polarization vision. Journal of Theoretical Biology, 175, 27- 37] and Schwind, R., & Horváth, G. (1993) [Reflection-polarization pattern at water surfaces and correction of a common representation of the polarization pattern of the sky. Naturwissenschaften, 80, 82-83] on the fine structure of this reflection-polarization pattern. We compared the measured reflection-polarization pattern with the theoretical reflection-polarization patterns computed for single-scattering Rayleigh skylight and measured real skylight reflected from the flat water surface, the repolarization characteristics of which are described by the Fresnel theory. Analysing and comparing the theoretical and measured reflection-polarization patterns, we could establish that the earlier predictions of Horváth (1995) and Schwind and Horváth (1993) were correct. Contrary to other full-sky polarimeters, our 180° field of view rotating-analyzer imaging photopolarimeter is useful not only for sky measurements, but also for downward viewing polarimetry. It can be used in atmospheric optics as well as in biological investigations involving animal polarization vision and orientation on the basis of skylight polarization or water-surface-reflected polarized light.

AB - Using 180° field of view imaging polarimetry, we measured the polarization characteristics (degree and angle of linear polarization) of the entire clear sunset sky and the reflection-polarization pattern of the flat water surface under this sky in order to test the validity of the earlier theoretical predictions made by Horváth, G. (1995) [Reflection-polarization patterns at flat water surfaces and their relevance for insect polarization vision. Journal of Theoretical Biology, 175, 27- 37] and Schwind, R., & Horváth, G. (1993) [Reflection-polarization pattern at water surfaces and correction of a common representation of the polarization pattern of the sky. Naturwissenschaften, 80, 82-83] on the fine structure of this reflection-polarization pattern. We compared the measured reflection-polarization pattern with the theoretical reflection-polarization patterns computed for single-scattering Rayleigh skylight and measured real skylight reflected from the flat water surface, the repolarization characteristics of which are described by the Fresnel theory. Analysing and comparing the theoretical and measured reflection-polarization patterns, we could establish that the earlier predictions of Horváth (1995) and Schwind and Horváth (1993) were correct. Contrary to other full-sky polarimeters, our 180° field of view rotating-analyzer imaging photopolarimeter is useful not only for sky measurements, but also for downward viewing polarimetry. It can be used in atmospheric optics as well as in biological investigations involving animal polarization vision and orientation on the basis of skylight polarization or water-surface-reflected polarized light.

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KW - Sunset sky

KW - Twilight

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Measurement of the reflection - Polarization pattern of the flat water surface under a clear sky at sunset

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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