Einsatz und Nutzen der optischen Kohärenztomografie (OCT) bei technischen Bauteilen
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1 Einsatz und Nutzen der optischen Kohärenztomografie (OCT) bei technischen Bauteilen Produktionsmesstechnik in der Praxis (link) Buchs, 7. Sept Ch. Meier 1 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
2 Outline 1. Introduction Tomographic Methodes, Medical Applications 2. Some OCT Basics, Features and Classifications 3. Industrial Applications 2 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
3 Tomographic Methods in Medical Engineering Tomography = 3D image by sections Greek word tomos = slice, section CT MRI PET X-ray Magnetic Resonance Imaging Positron Emission Tomography 3 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
4 Tomographic Methods in Medical Engineering Ultra Sound Tomography UST Optical Diffusion Tomography ODT Photoacoustic Tomography PAT Confocal Microscopy Stained mitochondrial network Olypus Microscopy 4 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
5 State of the art, retina imaging 5 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
6 Anterior segment of the eye Homebuilt 1060nm System, OptoLab BFH, 2011 Grulkowski, OpticsExpress / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
7 1060nm OCT (Homebuilt OptoLab) 7 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
8 Endoscopic OCT and cardiology From LightLab Kume, Assessment of corocary calcification by OCT, PCR online / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
9 Functional OCT, Doppler Bachmann, Leitgeb. OpticExpress, / 32 Leitgeb in Optical Cherence Tomography, Springer 2008 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
10 Tomographic Methods in Medical Engineering MRI, PET CT Name Speed Hazard CT MRI - - PET UST ++ - DOT - - PAT + - OCT / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
11 OCT: wavelength range Hemoglobin and water have low absorption in near infrared Diagnostic window Commonly used wavelengths: 840nm 1060nm 1310 nm 11 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
12 3D Imaging by scanning OCT A-scan: Depth profile of backscattered or back reflected light B-scan: Cross section obtained by scanning in x direction C-scan: 3D image. Source S(λ) Spectrometer Similar to ultrasonic time of flight measurements Interferometric measurement technique 0 z 12 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
13 Basic principle: Time Domain OCT Michelson Interferometer setup with moving reference mirror The signal envelope represent the reflectivity depth profile 13 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
14 FD-OCT, basic principle Source S(λ) Spectrometer z 0 z 1 Swept Source Detector z 0 z 1 z 14 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
15 Resolution: OCT and Microscopy Lateral resolution Axial resolution Confocal Microscope OCT z 0 Coherence gate 15 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
16 Scanning OCT Full Field Cam OCT SLED Detector TD OCT Source S(λ) z 0 z SLED Cam SS 0 z FD OCT Swept Source Detector 0 z 16 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
17 White Light Interferometry (Full Field Time Domain ) Different Microscope manufacturer provide such systems. Z-Resolution some nm Slow scanning motion Problem: mechanical vibration S 17 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
18 Full Field OCT: Smart Pixel Technology Phase Sensitive Parallel Optical Coherence Tomography Number of pixels 144 x 90 Vertical resolution 200nm Lateral resolution 2 um Frame rate 5 khz May 2011: 300x / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
19 Surface Characterisation (ISO 4287) 19 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
20 Electronic components I) Solder bumps (BGAs) II) Pads of an integrated circuit 20 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
21 Low Coherence Interferometry in Laser Hole Drilling Aspect Ratio up to 200:1 How to measure the drill depth? Axial resolution of OCT / LCI systems is independent of numerical aperture 21 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
22 Hole evolution Webster, P. J. (2010), 'In situ 24 khz coherent imaging of morphology change in laser percussion drilling', Opt. Lett. 35(5), Paul J. L. Webster, (2010), 'Automatic real-time guidance of laser machining with inline coherent imaging', Journal of Laser Applications / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
23 Untersuchungen an Kunststoff Strukturen Mit OCT können verborgene Strukturen vermessen werden. + Bessere Auflösung als US + Schnelle Messung möglich Begrenzte Messtiefe Pigmente können Messtiefe verkleinern Vibrationen können stören Quelle: OptoLab / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
24 Beschichtete Folien Bern University of Applied Sciences Quelle: OptoLab / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
25 Optical control of bio-printed skin KTI project in collaboration ZHAW and Delta Robotics (KTI ) Integration of OCT into the Delta Robotics engine Control of the quality and thickness homogeneity of the printed skin with OCT Quelle: OptoLab / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
26 Paper Industry Bern University of Applied Sciences Alorousu / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
27 Printed HF Electronics CZAJKOWSKI, Optical Review, / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
28 Elastography Bern University of Applied Sciences OCT-based elastography for large and small deformations Sean J. Kirkpatrick, et al Department of Biomedical Engineering, Oregon Health & Science University, Portland, Oregon USA / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
29 Stress measurement Stress in material induce birfringence State of polarization is affected With Polarization Sensitive OCT (PS-OCT) volumetric stress mapping is possible D. Stifter,et al "Dynamic optical studies in materials testing with spectral-domain polarization-sensitive optical coherence tomography," Opt. Express 18, (2010). 29 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
30 Non destructive Evaluation NDE 30 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
31 Art 31 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
32 OptoLab BFH TI Biel Biomedical Master or MSE Master Master Thesis available Thank you for your attention M. Stoller, D. Tääschler, D. Ernst, M. Peyer, P. Steiner Ch. Meier, S. Remund, A. Bossen, P. Stalder, A. Holzer, Ch Höschele 32 / 32 Produktionsmesstechnik in der Praxis, Buchs Ch. Meier
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