Ultra-high resolution optical coherence tomography for material characterization and quality control

Karin Wiesauer; Michael Pircher; Erich Goetzinger; Rainer Engelke; Gisela Ahrens; Gabi Gruetzner; Christoph K. Hitzenberger; David Stifter

doi:10.1117/12.593612

21 March 2005 Ultra-high resolution optical coherence tomography for material characterization and quality control

Karin Wiesauer, Michael Pircher, Erich Goetzinger, Rainer Engelke, Gisela Ahrens, Gabi Gruetzner, Christoph K. Hitzenberger, David Stifter

Author Affiliations +

Proceedings Volume 5714, Commercial and Biomedical Applications of Ultrafast Lasers V; (2005) https://doi.org/10.1117/12.593612
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

Abstract

Optical coherence tomography (OCT), so far mainly used in the biomedical field, has a high potential as non-destructive and contactless technique for material characterization and analysis. For these applications, OCT systems with ultra-high resolution in the micrometer range and capable of high imaging speeds are required. In this work, we combine ultra-high resolution imaging using a femtosecond Ti:sapphire laser as light source with the concepts of transversal OCT. Based on acquisition by heterodyne detection via acousto-optic modulators (AOMs), and by using an xy-galvano scanner unit we are able to obtain en-face scans with sizes as large as 3 x 3 mm² within a few seconds. The ultra-high resolution of our OCT system of 2.95 μm axially and 4 μm laterally, both in air, is shown to be essential for imaging of different compounds and fibre materials. We demonstrate the benefits of en-face scanning OCT for various applications in material investigation where in-plane information is of interest which can hardly be obtained by cross-sectional OCT.

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Karin Wiesauer, Michael Pircher, Erich Goetzinger, Rainer Engelke, Gisela Ahrens, Gabi Gruetzner, Christoph K. Hitzenberger, and David Stifter "Ultra-high resolution optical coherence tomography for material characterization and quality control", Proc. SPIE 5714, Commercial and Biomedical Applications of Ultrafast Lasers V, (21 March 2005); https://doi.org/10.1117/12.593612

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