{"id":{"repo_id":"heid-thes","oai_identifier":"oai:archiv.ub.uni-heidelberg.de:15899"},"canonical_url":"https://search.dev.ndltd.org/etd/heid-thes/oai:archiv.ub.uni-heidelberg.de:15899","repository":{"repo_id":"heid-thes","name":"Universität Heidelberg ; Thes","base_url":"http://archiv.ub.uni-heidelberg.de/volltextserver/cgi/oai2"},"display":{"title":"Development of an imaging polarimeter for water wave slope measurements","abstract":"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.","abstract_html":"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.","abstract_has_math":false,"creators":["Bauer, Paulus Salomon"],"institution":"Universität Heidelberg","degree_name":null,"degree_level":"master","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Jähne, Bernd"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-11-04","date_published":"2013-11-04","updated_at":"2026-07-24T02:30:55Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://www.ub.uni-heidelberg.de/archiv/15899","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Jähne, Bernd"]},{"key":"dc:creator","label":"Author","values":["Bauer, Paulus Salomon"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Heidelberg"]},{"key":"dc:type","label":"Dc Type","values":["masterThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["master"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Heidelberg"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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.","Ein bildgebendes polarimetrisches Instrument zur Messung der Neigung von Wasserwellen wurde entwickelt. Aus der Messung von drei linearen Polarisationszuständen werden die ersten drei Komponenten des Stokes-Vektors bestimmt. Die Neigung der Wasseroberfläche wird aus der Messung der Polarisation von reflektiertem Licht berechnet. Im Gegensatz zu herkömmlichen Polarimetern werden keine spezialisierten optischen Elemente benötigt, es kommt ein einfacher Aufbau aus drei parallel angeordneten Kameras mit Polarisationsfiltern zum Einsatz. Ein Mehraufwand in der Kalibrierung und Bildverarbeitung wird dabei in Kauf genommen. Der Kamera-Aufbau wurde mit einer dafür entwickelten Methode und einem eigens angefertigten Kalibriertarget kalibriert (extrinsische, intrinsische und Verzerrungs-Parameter). Die Analyse-Matrix, die die gemessenen Polarisationszustände in die Komponenten des Stokes-Vektors überführt, wurde bestimmt und experimentell verifiziert. Ein Datensatz, der während eines Experiments an Bord des Forschungsschiffs Meteor aufgenommen wurde, wurde analysiert. In einem Experiment an der Hamburgische Schiffsbau-Versuchsanstalt wurde das Polarimeter erfolgreich unter Laborbedingungen eingesetzt. Seine Fähigkeit, die Neigungsverteilung mechanisch erzeugter Wellen zu messen, wird demonstriert. Aus der Integration der Neigungsmessungen gewonnene Wellenhöhen-Leistungsspektren stimmen gut mit Referenzmessungen mit einem Wellendraht überein. Abweichungen, die bei niedrigen Frequenzen durch die kleine Größe des Polarimeter-Messfelds auftreten, können durch eine experimentell bestimmte Transferfunktion korrigiert werden."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Development of an imaging polarimeter for water wave slope measurements","Entwicklung eines bildgebenden Polarimeters für die Messung der Neigung von Wasserwellen"]}]}],"canonical_facts":{"dc:contributor":["Jähne, Bernd"],"dc:creator":["Bauer, Paulus Salomon"],"dc:description.abstract":["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.","Ein bildgebendes polarimetrisches Instrument zur Messung der Neigung von Wasserwellen wurde entwickelt. Aus der Messung von drei linearen Polarisationszuständen werden die ersten drei Komponenten des Stokes-Vektors bestimmt. Die Neigung der Wasseroberfläche wird aus der Messung der Polarisation von reflektiertem Licht berechnet. Im Gegensatz zu herkömmlichen Polarimetern werden keine spezialisierten optischen Elemente benötigt, es kommt ein einfacher Aufbau aus drei parallel angeordneten Kameras mit Polarisationsfiltern zum Einsatz. Ein Mehraufwand in der Kalibrierung und Bildverarbeitung wird dabei in Kauf genommen. Der Kamera-Aufbau wurde mit einer dafür entwickelten Methode und einem eigens angefertigten Kalibriertarget kalibriert (extrinsische, intrinsische und Verzerrungs-Parameter). Die Analyse-Matrix, die die gemessenen Polarisationszustände in die Komponenten des Stokes-Vektors überführt, wurde bestimmt und experimentell verifiziert. Ein Datensatz, der während eines Experiments an Bord des Forschungsschiffs Meteor aufgenommen wurde, wurde analysiert. In einem Experiment an der Hamburgische Schiffsbau-Versuchsanstalt wurde das Polarimeter erfolgreich unter Laborbedingungen eingesetzt. Seine Fähigkeit, die Neigungsverteilung mechanisch erzeugter Wellen zu messen, wird demonstriert. Aus der Integration der Neigungsmessungen gewonnene Wellenhöhen-Leistungsspektren stimmen gut mit Referenzmessungen mit einem Wellendraht überein. Abweichungen, die bei niedrigen Frequenzen durch die kleine Größe des Polarimeter-Messfelds auftreten, können durch eine experimentell bestimmte Transferfunktion korrigiert werden."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Heidelberg"],"dc:title":["Development of an imaging polarimeter for water wave slope measurements","Entwicklung eines bildgebenden Polarimeters für die Messung der Neigung von Wasserwellen"],"dc:type":["masterThesis"],"thesis:degree_level":["master"],"thesis:institution_name":["Universität Heidelberg"]},"updated_at":"2026-07-24T02:30:55Z"}