1. RECENDT

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    1. Mentioned In 41 Articles

    2. Time-encoded mid-infrared Fourier-domain optical coherence tomography

      Time-encoded mid-infrared Fourier-domain optical coherence tomography
      In this contribution, we report on a technically simple approach to high-resolution and sensitive spectral-domain OCT imaging in the mid-infrared range. The proposed OCT system employs an InF 3 supercontinuum source; for detection, a time-encoded spectrometer based on a single InAsSb point detector is used. The developed spectrometer enables structural imaging in the spectral range from around 3140 nm to 4190 nm with a characterised sensitivity above 80 dB and ...
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      Mentions: RECENDT
    3. Researchers demonstrate nondestructive mid-infrared imaging using entangled photons

      Researchers demonstrate nondestructive mid-infrared imaging using entangled photons
      Researchers have shown that entangled photons can be used to improve the penetration depth of optical coherence tomography (OCT) in highly scattering materials. The method represents a way to perform OCT with mid-infrared wavelengths and could be useful for non-destructive testing and analysis of materials such as ceramics and paint samples.
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    4. Frequency-domain optical coherence tomography with undetected mid-infrared photons

      Frequency-domain optical coherence tomography with undetected mid-infrared photons
      Mid-infrared (mid-IR) light scatters much less than shorter wavelengths, allowing greatly enhanced penetration depths for optical imaging techniques such as optical coherence tomography (OCT). However, both detection and broadband sources in the mid-IR are technologically challenging. Interfering entangled photons in a nonlinear interferometer enables sensing with undetected photons, making mid-IR sources and detectors obsolete. Here we implement mid-IR frequency-domain OCT based on ultra-broadband entangled photon pairs spanning from 3.3 ...
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    5. Correlative infrared optical coherence tomography and hyperspectral chemical imaging

      Correlative infrared optical coherence tomography and hyperspectral chemical imaging
      Optical coherence tomography (OCT) is a high-resolution three-dimensional imaging technique that enables nondestructive measurements of surface and subsurface microstructures. Recent developments of OCT operating in the mid-infrared (MIR) range (around 4 m) lifted fundamental scattering limitations and initiated applied material research in formerly inaccessible fields. The MIR spectral region, however, is also of great interest for spectroscopy and hyperspectral imaging, which allow highly selective and sensitive chemical studies of materials ...
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    6. Absolute depth LIBS-stratigraphy with NoScSiSp-OCT

      Absolute depth LIBS-stratigraphy with NoScSiSp-OCT
      LIBS is a proven method for elemental analysis. It needs little to no sample preparation and relies solely on optical access to the sample. LIBS has therefore been handled as a promising analytical method for layered or structured samples with the potential to replace metallurgic cross-sections followed by SEM/EDX raster screenings. Due to the strong dependency of the ablation process on changing crater geometries, laser fluence, and plasma dynamics ...
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    7. Dual-band infrared optical coherence tomography using a single supercontinuum source

      Dual-band infrared optical coherence tomography using a single supercontinuum source
      Recent developments and commercial availability of low-noise and bright infrared (IR) supercontinuum sources initiated intensive applied research in the last few years. Covering a significant part of near- and mid-infrared spectral ranges, supercontinuum radiation opened up unique possibilities and alternatives for the well-established imaging technique of optical coherence tomography (OCT). In this contribution, we demonstrate the development, performance, and maturity of a cost-efficient dual-band Fourier-domain IR OCT system (2 m ...
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      Mentions: RECENDT
    8. Feature Of The Week 04/28/2019: Real-Time High-Resolution Mid-Infrared OCT

      Feature Of The Week 04/28/2019: Real-Time High-ResolutionMid-Infrared OCT
      The potential for improving the penetration depth of optical coherence tomography systems by using light sources with longer wavelengths 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, a ...
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    9. 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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    10. 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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    11. 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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      Mentions: RECENDT
    12. 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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  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).