1. FEMTO-ST Institute

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    1. Mentioned In 14 Articles

    2. Design and Fabrication of a 2-Axis Electrothermal MEMS Micro-Scanner for Optical Coherence Tomography

      Design and Fabrication of a 2-Axis Electrothermal MEMS Micro-Scanner for Optical Coherence Tomography
      This paper introduces an optical 2-axis Micro Electro-Mechanical System (MEMS) micromirror actuated by a pair of electrothermal actuators and a set of passive torsion bars. The actuated element is a dual-reflective circular mirror plate of 1 m m in diameter. This inner mirror plate is connected to a rigid frame via a pair of torsion bars in two diametrically opposite ends located on the rotation axis. A pair of electrothermal ...
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    3. 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 ...
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    4. Characterization and micro-assembly of electrostatic actuators for 3-DOF micromanipulators in laser phonomicrosurgery

      Characterization and micro-assembly of electrostatic actuators for 3-DOF micromanipulators in laser phonomicrosurgery
      This paper presents a design of electrostatic actuators for 3-DOF micromanipulators in robot-assisted laser phonomicrosurgery. By integrating three sets of electrostatic actuators in a vertical configuration, scanning micro-mirror can be used as a manipulator for laser source. Key enable technology for these miniaturized actuators is microfabrication processes for microelectromechanical systems (MEMS) because the processes can create submicron features with high precision, mass productive, and low cost. Based on precise micromachined ...
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    5. 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 ...
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    6. PhD Student Position: design, fabrication and control of 2-axis endoscopic MOEMS scanner and implementation in an endomicroscopy microsystem for early diagnosis of cancer FEMTO-ST, Besançon, France

      PhD Student Position: design, fabrication and control of 2-axis endoscopic MOEMS scanner and implementation in an endomicroscopy microsystem for early diagnosis of cancer FEMTO-ST, Besançon, France
      ...endoscopic MOEMS scanner and implementation in an endomicroscopy microsystem for early diagnosis of cancerThe FEMTO-ST Institute (CNRS unit), associated with the Université de Franche-Comté (UFC), announces the opening o...
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    7. Integrated three-dimensional scanner for endoscopic optical coherence tomography

      Integrated three-dimensional scanner for endoscopic optical coherence tomography
      Numerous optical imaging techniques have been developed for clinical diagnostics; among these, optical coherence tomography (OCT) has proven to be of considerable utility due to its ability to non-destructively image below the surface of tissue. Endoscopic OCT systems will further extend the capabilities of this approach but require an additional means for scanning in two or three dimensions. We present an integrated optical microsystem which allows scanning of an optical ...
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    8. 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 ...
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    9. Dispersion compensation properties of grating-based temporal-correlation Optical Coherence Tomography systems

      This article explores specific dispersion compensation properties of an OCT set-up based on temporal correlation performed by using a diffraction grating. The linear dispersion term introduced by a glass plate with a thickness of up to 9 mm has been experimentally compensated optically through the position adjustment of the output imaging lens and for a light bandwidth of 100 nm. The dispersion compensation principle is described theoretically and results obtained ...
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    10. Spectroscopic OCT by Grating-Based Temporal Correlation Coupled to Optical Spectral Analysis.

      Spectroscopic OCT by Grating-Based Temporal Correlation Coupled to Optical Spectral Analysis.
      Spectroscopic optical coherence tomography (spectroscopic OCT) is an echographic-like optical method for biomedical functional imaging. Current spectroscopic optical coherence tomography (OCT) methods rely on a posteriori numerical calculation. We present an alternative for optically accessing the spectroscopic information in OCT, that is, without postprocessing, by using a grating-based correlation and a wavelength demultiplexing system. Spectrally resolved A-scan is directly recorded on the image sensor. Due to the grating-based system, no ...
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    11. 1-14 of 14
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  2. About FEMTO-ST Institute

    FEMTO-ST Institute

    FEMTO-ST (Franche-Comté Electronique Mécanique Thermique et Optique – Sciences et Technologies) is a joint research unit which is affiliated with the French National Centre of Scientific Research (CNRS), the University of Franche-Comté (UFC), the National School of Mechanical Engineering and Microtechnology (ENSMM), and the Belfort-Montbéliard University of Technology (UTBM).  FEMTO-ST was founded in January 2004 from the merger of 5 different laboratories active in different fields of engineering science: mechanics, optics and elecommunications, electronics, time-frequency, energetics and fluidics.  Within the CNRS, FEMTO-ST belongs to the Sciences and Technologies of Information and Engineering Department (ST2I) . It gathers completary skills, develops multidisciplinarity with an emphasis on scientific excellence and innovation. In 2006, FEMTO-ST is one of the first public research institutes in France to be awarded with the "Carnot Label" by the French Research Minister for its ability to fulfill reliable and high standard researches with industrial partners. In 2008, the institute integrates new competences in the fields of automatism, microrobotics, materials and surfaces and reinforce its research activities in energy.  Among the 500 employees including 270 permanent positions (175 researchers, professors or assistant-professors and 95 engineers, technicians and administrative staff), about 180 doctorate students receive a high-level training in scientific research.