Scattering properties of sands. 1. Comparison between different techniques of measurements

Abstract : Measuring linear polarization of light scattered by a cloud of particles can help retrieve their physical properties. We present an extensive study of polarimetric measurements of sand grains that can be found on the surface and in the atmosphere of the Earth. Different techniques of measurements are compared using the Laboratoire de Météorologie Physique nephelometer on the ground and the Propriétés Optiques des Grains Astronomiques et Atmosphériques on the ground and in microgravity during parabolic flights. The techniques used on the ground bias the measurements. When the grains are lifted by an air draft, differentiation is produced in the size distribution and the nature of the floating particles. When the grains are carried along with the airflow, some grains become oriented along the flow direction at air speeds greater than a few meters per second, producing abnormal negative polarization. On the other hand, measurements conducted under microgravity permit the retrieval of the representative optical properties of the lifted sand grains with sizes greater than tens of micrometers.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-00110947
Contributor : Cécile Takacs <>
Submitted on : Thursday, November 2, 2006 - 4:31:29 PM
Last modification on : Friday, April 5, 2019 - 8:24:07 PM

Identifiers

Citation

Daniel Daugeron, Jean-Baptiste Renard, Bertrand Gaubicher, Benoît Couté, Edith Hadamcik, et al.. Scattering properties of sands. 1. Comparison between different techniques of measurements. Applied optics, Optical Society of America, 2006, 45 (32), pp.8331-8337. ⟨10.1364/AO.45.008331⟩. ⟨hal-00110947⟩

Share

Metrics

Record views

203