1. Measurement of structure and strain by transversal ultra-high resolution polarisation-sensitive optical coherence tomography
- Author
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David Stifter, Gabi Grützner, Gisela Ahrens, Karin Wiesauer, Michael Pircher, Christoph K. Hitzenberger, R. Osterand, Rainer Engelke, and Erich Götzinger
- Subjects
Microelectromechanical systems ,Fabrication ,Materials science ,genetic structures ,medicine.diagnostic_test ,business.industry ,Mechanical Engineering ,Resolution (electron density) ,Metals and Alloys ,Shell (structure) ,Photoresist ,eye diseases ,Optics ,Optical coherence tomography ,Mechanics of Materials ,Nondestructive testing ,Materials Chemistry ,medicine ,sense organs ,business ,Anisotropy - Abstract
Optical coherence tomography (OCT) is a technique for contactless and non-destructive imaging of internal structures within semi-transparent materials. When OCT is performed polarisation-sensitively (PS-OCT), additional information about internal anisotropies and strains is obtained. Originally developed for the biomedical sector, OCT increasingly attracts interest for material characterisation. In this work, we apply PS-OCT imaging for non-biological samples using a novel transversal ultra-high resolution PS-OCT set-up. We demonstrate the advantages of this technique for structural analysis and strain mapping for different types of samples: we evaluate photoresist moulds for the fabrication of micro-electromechanical parts (MEMS), and we investigate the glass-fibre composite outer shell of helicopter rotor blades where defects have formed.
- Published
- 2007
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