title: Development of an imaging polarimeter for water wave slope measurements
creator: Bauer, Paulus Salomon
subject: ddc-530
subject: 530 Physics
description: An imaging polarimetric slope sensing instrument for measuring water waves has been developed.  From themeasurement of the intensities of three different linear polarization states,  it is possible to determine the first three components of the polarization Stokes vector. The  slope of the water surface is computed from the measurement of the polarization of reflected  light. Unlike in common polarimeters, custom optics are not required in this simple setup  consisting of three cameras aligned in parallel and each equipped with a standard polarization  filter. The trade-off for the simple setup is the need for more extensive system calibration  and image post-processing. The camera setup was fully calibrated (extrinsic, intrinsic,  and distortion parameters) with a specialized calibration procedure using a custom built target.  The analyzer matrix, which transforms the intensities of the measured polarization states  into the Stokes vector components was determined and verified experimentally. A data set  collected during an experiment on board the research vessel Meteor is analyzed. In an experiment  at the Hamburgische Schiffsbau-Versuchsanstalt, the polarimeter was successfully  operated under laboratory conditions. It is shown to be capable of measuring the slope distribution  of mechanically generated waves. Elevation power spectra, determined by integration  of the slope measurements, show good agreement with reference measurements with a wave  wire. Deviations at low wave frequencies due the small size of the polarimeter footprint can  be compensated with a transfer function that is derived from the measurements.
date: 2013
type: Master's thesis
type: info:eu-repo/semantics/masterThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/15899/1/Masterarbeit_Bauer_Paulus.pdf
identifier: DOI:10.11588/heidok.00015899
identifier: urn:nbn:de:bsz:16-heidok-158996
identifier:   Bauer, Paulus Salomon  (2013) Development of an imaging polarimeter for water wave slope measurements.  [Master's thesis]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/15899/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng