{"id":{"repo_id":"queens","oai_identifier":"oai:queensu.scholaris.ca:1974/34551"},"canonical_url":"https://search.dev.ndltd.org/etd/queens/oai:queensu.scholaris.ca:1974/34551","repository":{"repo_id":"queens","name":"Queens University","base_url":"https://qspace.library.queensu.ca/server/oai/request"},"display":{"title":"Stroboscopic Inline Coherent Imaging","abstract":"Inline coherent imaging (ICI) is an in-situ monitoring technique, used in laser processing applications such as welding and additive manufacturing. Conventional ICI systems image with a continuous-wave broadband light source, which makes the system susceptible to an effect known as motion artifact. Motion artifact occurs when the interface moves over the detector exposure time, causing attenuation of the interfaces, or even a complete loss of signal when capturing high-speed motion. To address this challenge, I use stroboscopic ICI, which is a technique that involves replacing the continuous-wave (CW) imaging source with an ultrafast pulsed light source to effectively \"freeze\" motion. I show that stroboscopic ICI can outperform CW-ICI by increasing successful imaging rates in welding by up to 74%.","abstract_html":"Inline coherent imaging (ICI) is an in-situ monitoring technique, used in laser processing applications such as welding and additive manufacturing. Conventional ICI systems image with a continuous-wave broadband light source, which makes the system susceptible to an effect known as motion artifact. Motion artifact occurs when the interface moves over the detector exposure time, causing attenuation of the interfaces, or even a complete loss of signal when capturing high-speed motion. To address this challenge, I use stroboscopic ICI, which is a technique that involves replacing the continuous-wave (CW) imaging source with an ultrafast pulsed light source to effectively "freeze" motion. I show that stroboscopic ICI can outperform CW-ICI by increasing successful imaging rates in welding by up to 74%.","abstract_has_math":false,"creators":["Greenwood, Melanie"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Physics, Engineering Physics and Astronomy","school":null,"contributors":[],"advisors":["Fraser, James"],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-05-06","date_published":"2025-05-06","updated_at":"2026-07-27T20:35:31Z","subjects":["Optics","Laser Welding","Coherent Imaging"],"languages":["eng"],"rights":["Attribution-NonCommercial-NoDerivatives 4.0 International"],"rights_urls":["http://creativecommons.org/licenses/by-nc-nd/4.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1974/34551","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Physics, Engineering Physics and Astronomy"]},{"key":"dc:contributor.supervisor","label":"Supervisor","values":["Fraser, James"]},{"key":"dc:creator","label":"Author","values":["Greenwood, Melanie"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-05-06T13:35:46Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-05-06T13:35:46Z"]},{"key":"dc:date.issued","label":"Date","values":["2025-05-06"]},{"key":"dc:type","label":"Dc Type","values":["thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Optics","Laser Welding","Coherent Imaging"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Attribution-NonCommercial-NoDerivatives 4.0 International"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://creativecommons.org/licenses/by-nc-nd/4.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1974/34551"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Inline coherent imaging (ICI) is an in-situ monitoring technique, used in laser processing applications such as welding and additive manufacturing. Conventional ICI systems image with a continuous-wave broadband light source, which makes the system susceptible to an effect known as motion artifact. Motion artifact occurs when the interface moves over the detector exposure time, causing attenuation of the interfaces, or even a complete loss of signal when capturing high-speed motion. To address this challenge, I use stroboscopic ICI, which is a technique that involves replacing the continuous-wave (CW) imaging source with an ultrafast pulsed light source to effectively \"freeze\" motion. I show that stroboscopic ICI can outperform CW-ICI by increasing successful imaging rates in welding by up to 74%."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.A.Sc."]},{"key":"dc:title","label":"Title","values":["Stroboscopic Inline Coherent Imaging"]}]}],"canonical_facts":{"dc:contributor.department":["Physics, Engineering Physics and Astronomy"],"dc:contributor.supervisor":["Fraser, James"],"dc:creator":["Greenwood, Melanie"],"dc:date.accessioned":["2025-05-06T13:35:46Z"],"dc:date.available":["2025-05-06T13:35:46Z"],"dc:date.issued":["2025-05-06"],"dc:description.abstract":["Inline coherent imaging (ICI) is an in-situ monitoring technique, used in laser processing applications such as welding and additive manufacturing. Conventional ICI systems image with a continuous-wave broadband light source, which makes the system susceptible to an effect known as motion artifact. Motion artifact occurs when the interface moves over the detector exposure time, causing attenuation of the interfaces, or even a complete loss of signal when capturing high-speed motion. To address this challenge, I use stroboscopic ICI, which is a technique that involves replacing the continuous-wave (CW) imaging source with an ultrafast pulsed light source to effectively \"freeze\" motion. I show that stroboscopic ICI can outperform CW-ICI by increasing successful imaging rates in welding by up to 74%."],"dc:description.degree":["M.A.Sc."],"dc:identifier.uri":["https://hdl.handle.net/1974/34551"],"dc:language.iso":["eng"],"dc:rights":["Attribution-NonCommercial-NoDerivatives 4.0 International"],"dc:rights.uri":["http://creativecommons.org/licenses/by-nc-nd/4.0/"],"dc:subject":["Optics","Laser Welding","Coherent Imaging"],"dc:title":["Stroboscopic Inline Coherent Imaging"],"dc:type":["thesis"]},"updated_at":"2026-07-27T20:35:31Z"}