1. Articles from C. Gorecki

    1-5 of 5
    1. Swept-source optical coherence tomography microsystem with an integrated Mirau interferometer and electrothermal micro-scanner

      Swept-source optical coherence tomography microsystem with an integrated Mirau interferometer and electrothermal micro-scanner

      In the rapid evolution of gastrointestinal endomicroscopy, optical coherence tomography (OCT) has found many diverse applications. Until recently, the micro-opto–electro-mechanical systems (MOEMS) technology has been playing a key role in shaping the miniaturization of these components. We report here, to the best of our knowledge, a novel endoscopic microsystem. It is based on a spectrally tuned MOEMS Mirau micro-interferometer integrated with micro-electro-mechanical systems (MEMS) electro-thermal micro-scanner, operating in the regime of swept-source (SS) OCT imaging. This Letter validates our initial proof-of-concept toward the development of such MOEMS probe and the presentation of experimental performances of the resulting SS-OCT microsystem. .

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    2. Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection

      Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection

      The EU-funded project VIAMOS1 proposes an optical coherence tomography system (OCT) for skin cancer detection, which combines full-field and full-range swept-source OCT in a multi-channel sensor for parallel detection. One of the project objectives is the development of new fabrication technologies for micro-optics, which makes it compatible to Micro-Opto-Electromechanical System technology (MOEMS). The basic system concept is a wafer-based Mirau interferometer array with an actuated reference mirror, which enables phase shifted interferogram detection and therefore reconstruction of the complex phase information, resulting in a higher measurement range with reduced image artifacts. This paper presents an experimental one-channel on-bench OCT system ...

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    3. Technological platform for vertical multi-wafer integration of miniature imaging instruments

      Technological platform for vertical multi-wafer integration of miniature imaging instruments

      We describe a technological platform developed for miniaturization of optical imaging instruments, such as laser scanning confocal microscopes or Optical Coherence Tomography devices. The platform employs multi-wafer vertical integration approach, combined with integrated glass-based micro-optics and heterogeneous bonding and interconnecting technologies. In this paper we focus on the unconventional fabrication methods of monolithic micro-optical structures and components in borosilicate glass (e.g. micro beamsplitters, refractive microlenses) for optical beam shaping and routing. In addition, we present hybrid laser-assisted integration of glass ball microlenses on the silicon MEMS actuators for transmissive beam scanning as well as methods of electrical signals distribution ...

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    4. Optical design of a vertically integrated array-type Mirau-based OCT system

      Optical design of a vertically integrated array-type Mirau-based OCT system

      The presented paper shows the concept and optical design of an array-type Mirau-based OCT system for early diagnosis of skin cancer. The basic concept of the sensor is a full-field, full-range optical coherence tomography (OCT) sensor. The micro-optical interferometer array in Mirau configuration is a key element of the system allowing parallel imaging of multiple field of views (FOV). The optical design focuses on the imaging performance of a single channel of the interferometer array and the illumination design of the array. In addition a straylight analysis of this array sensor is given.

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    5. Looking for a new generation of MEMS-type confocal microscopes

      Looking for a new generation of MEMS-type confocal microscopes
      In the field of optical scanning microscopy the micro-scale or nano-scale samples are observed and analysed via large macro-tools, too bulky and heavy for individual use in specialised key missions such as in situ or in vivo measuring. A need for compact, robust scanning devices for endoscopic applications has stimulated the development of MEMS scanning mirrors for confocal imaging and for optical coherence tomography. The architecture of proposed on-chip confocal microscope is shown in Fig. 1 [1]. The individual microscope consists of two microlens scanner chips, a beamsplitter, a PIN detector and a pinhole aperture. The microlens scanner chips have ...
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    1-5 of 5
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  2. Topics in the News

    1. (3 articles) FEMTO-ST Institute
    2. (2 articles) Luc Froehly
    3. (2 articles) Harvard University
    4. (2 articles) Massachusetts General Hospital
    5. (2 articles) Carl Zeiss Meditec
    6. (1 articles) University of Florida
    7. (1 articles) Huikai K. Xie
    8. (1 articles) Medical University of Vienna
    9. (1 articles) University of Hong Kong
    10. (1 articles) Guillermo J. Tearney
    11. (1 articles) Desmond C. Adler
    12. (1 articles) Matthew J. Everett
    13. (1 articles) Nathan D. Shemonski
    14. (1 articles) Ursula Schmidt-Erfurth
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    Looking for a new generation of MEMS-type confocal microscopes Optical design of a vertically integrated array-type Mirau-based OCT system Technological platform for vertical multi-wafer integration of miniature imaging instruments Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection Swept-source optical coherence tomography microsystem with an integrated Mirau interferometer and electrothermal micro-scanner Artificial intelligence, the internet of things, and virtual clinics: ophthalmology at the digital translation forefront Detecting glaucoma based on spectral domain optical coherence tomography imaging of peripapillary retinal nerve fiber layer: a comparison study between hand-crafted features and deep learning model Comparison of line‐field confocal optical coherence tomography images with histological sections: Validation of a new method for in vivo and non‐invasive quantification of superficial dermis thickness Estimating Visual Field Mean Deviation using Optical Coherence Tomographic Nerve Fiber Layer Measurements in Glaucoma Patients Optical coherence tomography of retinal and choroidal layers in patients with familial hypercholesterolaemia treated with lipoprotein apheresis SWEPT SOURCE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY, FLUORESCEIN ANGIOGRAPHY, AND INDOCYANINE GREEN ANGIOGRAPHY COMPARISONS REVISITED Retinal microvasculature in pituitary adenoma patients: is optical coherence tomography angiography useful?