1. Michael Leitner

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    1. Mentioned In 21 Articles

    2. In-Line Monitoring of a Pharmaceutical Pan Coating Process by Optical Coherence Tomography

      In-Line Monitoring of a Pharmaceutical Pan Coating Process by Optical Coherence Tomography
      This work demonstrates a new in-line measurement technique for monitoring the coating growth of randomly moving tablets in a pan coating process. In-line quality control is performed by an optical coherence tomography (OCT) sensor allowing nondestructive and contact-free acquisition of cross-section images of film coatings in real time. The coating thickness can be determined directly from these OCT images and no chemometric calibration models are required for quantification. Coating thickness ...
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    3. Optical coherence tomography based particle image velocimetry (OCT-PIV) of polymer flows

      Optical coherence tomography based particle image velocimetry (OCT-PIV) of polymer flows
      The measurement of spatially resolved velocity distributions is crucial for modelling flow and for understanding properties of materials produced in extrusion processes. Traditional methods for flow visualization such as particle image velocimetry (PIV) rely on optically transparent media and cannot be applied to turbid polymer melts. Here we present optical coherence tomography as an imaging technique for PIV data processing that allows for measuring a sequence of time resolved images ...
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    4. Calibration-free in-line monitoring of pellet coating processes via optical coherence tomography

      Calibration-free in-line monitoring of pellet coating processes via optical coherence tomography
      The paper presents a new in-line measurement technique for determining the coating thickness and uniformity of pharmaceutical pellets during film-coating in a fluid-bed apparatus. Non-destructive and contact-free process monitoring was performed via an optical coherence tomography (OCT) sensor providing cross-section images. Through the OCT measurements, the coating thickness could be determined directly, without a chemometric calibration model required for the quantification. The direct integration of the OCT sensor head into ...
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    5. The influence of glass fibers on elongational viscosity studied by means of optical coherence tomography and X-ray computed tomography

      The influence of glass fibers on elongational viscosity studied by means of optical coherence tomography and X-ray computed tomography
      We report on the flow characteristics of glass-fiber-reinforced polymers in elongational rheometry. Unlike polymers with geometrically isotropic fillers, glass-fiber-reinforced polymers exhibit flow behavior and rheology that depend heavily on the orientation, the length distribution and the content of the fibers. One of the primary objectives of this study was to determine the effect of fiber orientation, concentration and distribution on the entrance pressure drop by means of optical coherence tomography ...
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    6. Apparatus and method of monitoring and measurement using spectral low coherence interferometry

      Apparatus and method of monitoring and measurement using spectral low coherence interferometry
      A spectral interferometry apparatus and method are disclosed, that can be used to monitor or measure an unknown length by following a characteristic of an indicating signal. The measurement is performed by adjusting an optical path difference (OPD) in an interferometer part of an interferometer configuration until sound or light or both are obtained with the desired strength and pitch. Embodiments are presented where the unknown length is the eye ...
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    7. Optical Coherence Tomography as a Novel Tool for In-Line Monitoring of a Pharmaceutical Film-Coating Process

      Optical Coherence Tomography as a Novel Tool for In-Line Monitoring of a Pharmaceutical Film-Coating Process
      Optical coherence tomography (OCT) is a contact-free non-destructive high-resolution imaging technique based on low-coherence interferometry. This study investigates the application of spectral-domain OCT as an in-line quality control tool for monitoring pharmaceutical film-coated tablets. OCT images of several commercially-available film-coated tablets of different shapes, formulations and coating thicknesses were captured off-line using two OCT systems with centre wavelengths of 830 nm and 1325 nm. Based on the off-line image evaluation ...
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    8. Feature Of The Week 3/10/13: Optical Coherence Tomography for Apple Surface Structure Evaluation

      Feature Of The Week 3/10/13: Optical Coherence Tomography for Apple Surface Structure Evaluation
      Worldwide a lot of effort is invested in delivering fruit of the highest quality to the consumer. This means that the fruit should look good, taste good and preserve these properties for a sufficiently long period of time after harvest in order for the fruit to be of commercial value. Of course many aspects need to be considered, but here we will focus on the function of the peel. The ...
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    9. First Symposium on OCT for Non-Destructive Testing (OCT4NT) held in Linz Austria a Success

      First Symposium on OCT for Non-Destructive Testing (OCT4NT) held in Linz Austria a Success
      On the 13 th and 14 th of February 2013 the RECENDT hosted the First International Symposium on Optical Coherence Tomography for Non-Destructive Testing OCT4NDT ( www.oct4ndt.com ) in Linz, Austria. The event was attended by around 65 researchers and company delegates from all over the world (covering 18 different countries on five different continents). During 27 talks and a poster session the different research groups had the possibility to ...
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    10. 1-15 of 21 1 2 »
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  2. About Michael Leitner

    Michael Leitner

    Michael Leitner has been active in the field of OCT for several years. From 2010 - 2013 he was head of the OCT group at RECENDT. In 2013 he organized the first international symposium on OCT applications in the area of non-destructive testing (OCT4NDT). Currently he is working at Thorlabs.