1. RECENDT

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    1. Mentioned In 33 Articles

    2. Mid-infrared Fourier-domain optical coherence tomography with a pyroelectric linear array

      Mid-infrared Fourier-domain optical coherence tomography with a pyroelectric linear array
      Optical technology in the mid-infrared wavelength range is currently a rapidly developing field initiated by the availability of novel high-power and spatially coherent sources. Non-destructive testing techniques based on these sources are very promising for industrial and medical applications. However, there are still many engineering problems due to the technical challenges and high prices of the optical elements suitable for the mid-infrared region. In this paper, we report the development ...
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    3. Real‐time High‐Resolution Mid‐infrared Optical Coherence Tomography

      Real‐time High‐Resolution Mid‐infrared Optical Coherence Tomography
      The potential for improving the penetration depth of optical coherence tomography systems by using increasingly longer wavelength light sources has been known since the inception of the technique in the early 1990s. Nevertheless, the development of mid‐infrared optical coherence tomography has long been challenged by the maturity and fidelity of optical components in this spectral region, resulting in slow acquisition, low sensitivity, and poor axial resolution. In this work ...
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    4. Multimodal non-contact photoacoustic imaging and optical coherence tomography using all optical detection

      Multimodal non-contact photoacoustic imaging and optical coherence tomography using all optical detection
      We present a multimodal optical setup, allowing non-contact photoacoustic imaging (PAI) and optical coherence tomography (OCT). Optical coherence tomography is sensitive to changes in the specimens refractive index, thereby offering complementary information to photoacoustic signals which are induced by light absorption. A multimodal setup, allowing OCT and photoacoustic measurements, should ideally not rely on any physical contact to a specimen and, thus, commonly used transducers for photoacoustic signal detection which ...
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    5. Multimodal system for non-contact photoacoustic imaging, optical coherence tomography, and mid-infrared photoacoustic spectroscopy

      Multimodal system for non-contact photoacoustic imaging, optical coherence tomography, and mid-infrared photoacoustic spectroscopy
      We present a multimodal optical setup, allowing non-contact photoacoustic imaging, optical coherence tomography (OCT), and non-contact mid-infrared photoacoustic spectroscopy. Photoacoustic signals are generated using a Nd:YAG laser and a tunable quantum cascade laser for photoacoustic imaging and spectroscopy, respectively. Photoacoustic signals are acquired by measuring the surface displacement of a specimen using a fiber-optic Mach-Zehnder interferometer. In the same fiber-optic network a spectral-domain OCT system is realized. Light from ...
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    6. Characterising kiwifruit (Actinidia sp.) near skin cellular structures using optical coherence tomography

      Characterising kiwifruit (Actinidia sp.) near skin cellular structures using optical coherence tomography
      Pre-harvest growing conditions during the development of fruit have impacts on fruit quality at the time of harvest and during storage. These impacts may result in differences in the skin properties of the fruit and some sub-surface cellular structural changes, which have potential effects on postharvest fruit quality and storability. Optical coherence tomography (OCT) is a non-destructive imaging method that enables acquisition of three-dimensional (3D) images of sub-surface structures of ...
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    7. 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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    8. Multimodal noncontact photoacoustic and optical coherence tomography imaging using wavelength-division multiplexing

      Multimodal noncontact photoacoustic and optical coherence tomography imaging using wavelength-division multiplexing
      We present multimodal noncontact photoacoustic (PA) and optical coherence tomography (OCT) imaging. PA signals are acquired remotely on the surface of a specimen with a Mach-Zehnder interferometer. The interferometer is realized in a fiber-optic network using a fiber laser at 1550 nm as the source. In the same fiber-optic network, a spectral-domain OCT system is implemented. The OCT system utilizes a supercontinuum light source at 1310 nm and a spectrometer ...
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    9. 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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    10. Automated pharmaceutical tablet coating layer evaluation of optical coherence tomography images

      Automated pharmaceutical tablet coating layer evaluation of optical coherence tomography images
      Film coating of pharmaceutical tablets is often applied to influence the drug release behaviour. The coating characteristics such as thickness and uniformity are critical quality parameters, which need to be precisely controlled. Optical coherence tomography (OCT) shows not only high potential for off-line quality control of film-coated tablets but also for in-line monitoring of coating processes. However, an in-line quality control tool must be able to determine coating thickness measurements ...
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  2. About RECENDT

    RECENDT

    RECENDT (Research Center for Non Destructive Testing) GmbH is based in Linz / Upper Austria and is an internationally well recognized Research Center for Non Destructive Testing and material characterization. The company is a 2009 – spin-off from the Upper Austrian Research (UAR) where the technological expertise has been built up since the year 2000. Shareholders are still the UAR, the Johannes Kepler University Linz (JKU) and the Upper Austrian University of Applied Science (FH OOE).