Spatial detection and localisation of multiple laser beams in optical measuring systems
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Jasmin Ruprecht
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Mingshuai Su
Abstract
Optical instruments are used in a broad range of applications in different fields of research and industry like microscopy, material science, metrology and fabrication. There, the optical adjustment of laser beams, optical rays and optical axes to a certain position is crucial for the correct function of the overall system. Often, multiple axes have to be adjusted, which requires the monitoring of multiple rays, preferably simultaneously. In this paper, a method for the spatial localisation of multiple laser beams is presented and demonstrated for an application in precision dimensional metrology. There, the position of seven spatially distributed laser beams can be detected with an uncertainty of <10 μm, enhancing the accuracy of the overall system. The underlying method is flexible in its approach and can be adapted to other optical systems.
Zusammenfassung
Optische Geräte finden breite Anwendung in verschiedenen Bereichen in Forschung und Industrie, wie Mikroskopie, Materialwissenschaft, Metrologie und Fertigung. Oft ist dort die optische Justage von Laserstrahlen, optischen Strahlen und optischen Achsen auf eine bestimmte Position entscheidend für die korrekte Funktion und die Leistungsfähigkeit des gesamten Systems. Typischerweise sind in diesen Systemen mehrere optische Achsen zu justieren, was die Beobachtung mehrerer Strahlen, vorzugsweise gleichzeitig, erforderlich macht. In diesem Beitrag wird ein Verfahren zur räumlichen Lagedetektion mehrerer Laserstrahlen vorgestellt und dessen Umsetzung an einer Anwendung in der Präzisionsmesstechnik praktisch gezeigt. Dort konnte die Position von sieben räumlich verteilten Laserstrahlen mit einer Unsicherheit <10 μm detektiert werden, wodurch die Genauigkeit des Gesamtsystems erhöht werden konnte. Die zugrunde liegende Methode ist in ihrem Ansatz flexibel und kann daher an andere optische Systeme angepasst werden.
Funding source: Deutsche Forschungsgemeinschaft in the scope of Research Training Group on Tip- and laser-based 3D
Award Identifier / Grant number: 274711337
About the authors
Jasmin Ruprecht graduated in 2024 in the field of Measurement and Sensor Technologies at the Technische Universität Ilmenau. Now she is a research and development engineer at LAYERTEC GmbH and works on the development of optical measuring systems.
Mingshuai Su graduated in 2021 in the field of laser measurement technology at the Technische Universität Ilmenau. Now he is scientific staff at the Friedrich-Alexander-Universität, chair of Fertigungsmesstechnik and works on a turnable AFM sensor there.
Maximilian Hoffmann graduated from Technische Universität Ilmenau in 2024 with a degree in mechanical engineering, specialising in mechanical design. He is now a research associate at the Department of Mechanical Engineering, Research Training Group NanoFab at the Technische Universität Ilmenau, working on length and force measurement.
Ingo Ortlepp completed his his doctorate in 2020 in the field of standing wave interferometry at the Technische Universität Ilmenau. Now he is a postdoc at the Institute of Process Measurement and Sensor Technology, working on Nanopositioning and Nanomeasuring Machines.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission. JR: theory, experiment, data evaluation, writing. MS: theory, experiment preparation. MH: experiment preparation, visualization. IO: concept, supervision, proofreading.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: This work was supported by the German Research Foundation in the scope of the Research Training Group on Tip- and laser-based 3D-Nanofabrication in extended macroscopic working areas (GRK2182 NanoFab), project number 274711337.
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Data availability: Not applicable.
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Articles in the same Issue
- Frontmatter
- Research Articles
- Measurement and advanced data post-processing of proton resonance frequency shift in 7 T MRI to obtain local temperature in a tissue-mimicking phantom
- Algorithmic assessment of drag on thermally cut sheet metal edges
- Messunsicherheit geometrischer Prüfmerkmale – Automatisiert und praxisgerecht mit Koordinatenmessgeräten ermitteln
- Measuring the frequency response of an optical microphone system with a fiber based setup
- Spatial detection and localisation of multiple laser beams in optical measuring systems
Articles in the same Issue
- Frontmatter
- Research Articles
- Measurement and advanced data post-processing of proton resonance frequency shift in 7 T MRI to obtain local temperature in a tissue-mimicking phantom
- Algorithmic assessment of drag on thermally cut sheet metal edges
- Messunsicherheit geometrischer Prüfmerkmale – Automatisiert und praxisgerecht mit Koordinatenmessgeräten ermitteln
- Measuring the frequency response of an optical microphone system with a fiber based setup
- Spatial detection and localisation of multiple laser beams in optical measuring systems
