Popular Articles
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OCT Companies in the News
(2 articles) Michelson Diagnostics
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Organizations in the News
(14 articles) Upper Austrian Research GmbH
(10 articles) Medical University of Vienna
(7 articles) University of Oulu
(2 articles) Moscow State University
(2 articles) Gwangju Institute of Science and Technology
(2 articles) National Research Council Canada
(2 articles) UK National Physical Laboratory
(2 articles) University of Kent
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Using Optical Coherence Tomography for Detection and Analysis of Jade
Explore Article Optical Coherence Tomography News (Jul 4 2010)
Feature Of The Week 7/4/10: Researchers at the National Research Council Canada have been very active in pushing the frontier of Optical Coherence Tomography across a wide range of technologies and applications. Recently Dr. Shoude Change et al published on a novel non-destructive evaluation application of OCT entitled "Jade Detection and Analysis Based on Optical Coherence Tomography Images". With a depth resolution of 4 mm in jade, and penetration range of 5 mm in jade, Swept-Source OCT could be used as a new powerful instrument to generate 3D volume data of jade, which is important for applications in jade industry ...
Comment on Article Mentions: Shoude Chang Youxin Mao Costel Flueraru
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Kuwait 2nd Nondestructive Testing Conference & Exhibition 13-14 December 2010
Explore Article Optical Coherence Tomography News (Jul 2 2010)
Kuwait Nondestructive Testing conference in its second year will provide an excellent opportunity to meet with regional and international experts and professionals who play a key role in the development and advancement of NDT. Kuwait NDT Conference is a technical forum aimed to promote effective communication and information dissemination for recent research advancements and refinements of NDT technologies. This year’s conference will bring an outstanding program covering NDT and Inspection related issues of great relevance to the region, including NDT methods and techniques, certification and management issues, inspection of inaccessible areas along with new digital techniques.
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Jade detection and analysis based on optical coherence tomography images
Explore Article SPIE Digital Library (Jun 15 2010)
Optical coherence tomography is a fundamentally new type of optical sensing technology that can perform high-resolution, cross sectional sensing of the internal structure of materials and biological samples. This work briefly describes its capability of exploring and analyzing the internal structures and textures of various jades. With a depth resolution of 4 µm in jade and penetration range of 5 mm in jade, swept-source OCT could be used as a new powerful instrument to generate 3-D volume data of jade, which is important for applications in jade industry and artwork, particularly for jade detection and classification, counterfeit recognition, and guided ...
Comment on Article Mentions: Shoude Chang Costel Flueraru National Research Council Canada
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Evaluating and identifying pearls and their nuclei by using optical coherence tomography
Explore Article opticsinfobase.org (Jun 8 2010)
Optical coherence tomography (OCT) has been utilized to evaluate pearls including their nuclei noninvasively. By visualizing the internal structure of a pearl, we could measure the thickness of its nacre layer, observe the fine sub-structure of the nacre, and inspect the nucleus through the nacre. The system also allowed us to classify pearls into beaded- and non-beaded ones; usually, the saltwater ones have nuclei even though there are beaded freshwater pears and non-beaded saltwater pearls. Any cracks, crevices, or blemishes not only in the nacre but in the nucleus of a pearl could be clearly visualized. The OCT system was ...
Comment on Article Mentions: Byeong Ha Lee Eunjung Min Gwangju Institute of Science and Technology
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Optical coherence tomography as an accurate inspection and quality evaluation technique in paper industry
Explore Article SpringerLink Home (Jun 4 2010)
Optical coherence tomography (OCT), a technique for the noninvasive imaging of turbid media, based on low-coherence interferometry, was originally developed for the imaging of biological tissues. Since the development of the technique, most of its applications have been related to the area of biomedicine. However, from early stages, the vertical resolution of the technique has already been improved to a submicron scale. This enables new possibilities and applications. This article presents the possible applications of OCT in paper industry, where submicron or at least a resolution close to one micron is required. This requirement comes from the layered structure of ...
Comment on Article Mentions: Risto A. Myllylä University of Oulu Erkki Alarousu
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Optical coherence tomography as a method of quality inspection for printed electronics products
Explore Article SpringerLink Home (Jun 4 2010)
Application of time domain, ultra high resolution optical coherence tomography (UHR-OCT) in printed electronics products’ quality inspection is demonstrated. Presented study was done using experimental UHR-OCT device based on a Kerr-lens mode locked Ti:sapphire femtosecond laser, photonic crystal fibre and modified, free-space Michelson interferometer. Possibilities of the technique are demonstrated by analysis of an RF antenna—example of printed electronics products. Measurements were done with submicron axial resolution, offered by UHR-OCT system developed in our laboratory. Such high resolution is necessary due to the thickness of material layers used in printed electronics. In addition to tomography imaging, numerical results were compared ...
Comment on Article Mentions: Risto A. Myllylä University of Oulu Erkki Alarousu
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Speckle noise reduction in optical coherence tomography of paint layers
Explore Article opticsinfobase.org (Dec 21 2009)
We present and characterize a sequential angular compounding method for reducing speckle contrast in optical coherence tomography images of paint layers. The results are compared with postprocessing methods, and we show that the compounding technique can improve the speckle contrast ratio in B-scans by better than a factor of 2 in exchange for a negligible loss of resolution. As a result, image aesthetics are improved, thin layers become more distinct, and edge-detection algorithms work more efficiently. The effect of varying the angular scan size and number of averages is investigated, and it is found that a degree of statistical correlation ...Comment on Article Mentions: Adrian G. Podoleanu University of Kent
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Structural and optical properties of wood and wood finishes studied using optical coherence tomography: application to an 18th century Italian violin
Explore Article opticsinfobase.org (Nov 13 2009)
Optical coherence tomography (OCT) is especially attractive for the study of cultural heritage artifacts because it is noninvasive and nondestructive. We have developed an original full-field time-domain OCT system dedicated to the investigation of varnished and painted artifacts: an interferometric Mirau objective allows one to perform the scan without moving the works of art. The axial and transverse high resolution (respectively, 1.5 and 1 μm) are well adapted to the detection of the investigated structures (pigment grains, wood fibers, etc.). The illumination spectrum is in the visible range (centered at 630 nm, 150 nm wide) to potentially allow us to ...
Comment on Article Mentions: Jean-Philippe Echard Isabelle Emond Mady Elias
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OCT aims for industrial application
Explore Article Laser Focus World (Sep 1 2009)
The speed, precision, and cost benefits of optical coherence tomography are beginning to attract the interest of industrial end users. For detailed subsurface imaging of small, semiopaque 2-D surface areas or 3-D structures, OCT is just the thing. When optical coherence tomography (OCT) was introduced in the early 1990s, it was immediately recognized for its ability to produce high-resolution, depth-resolved imagery of biological tissue. Its impact on ophthalmology is evident in a recent article published by Ocular Surgery News. Writes author Richard Lindstrom, “Every day in clinical practice around the world, optical coherence tomography is making a significant contribution to ...
Comment on Article Mentions: Michelson Diagnostics Thorlabs Richard L. Lindstrom
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Laser Processing Apparatus For Monitoring Processing State By Using Optical Coherence Tomography Technology (Wo 2009/096750)
Explore Article wipo.int (Aug 6 2009)
Disclosed is a laser processing apparatus for monitoring a processing state by using optical coherence tomography technology. The disclosed laser processing apparatus comprises: a processing unit that disrupts the molecular binding of a workpiece by using a femtosecond laser beam; a tomographic monitoring unit that monitors a three-dimensional state of the workpiece; and a controller that controls the output of femtosecond laser beam by using a three-dimensional tomographic image. The laser processing apparatus may further include a surface monitoring unit which monitors a surface state of the workpiece. The laser processing apparatus enables active control over its whole processes since ...
Comment on Article Mentions: Gwangju Institute of Science and Technology
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Multilayered structures examination using polarization sensitive optical coherence tomography
Explore Article Photonics Society of Poland (Jul 18 2009)
Optical Coherence Tomography (OCT) is an optical method for non-contact and non-destructive examination of inner structure of multi-layered structures. Polarization sensitive OCT (PS-OCT) is also capable of measuring local optical anisotropy changes. The measurement results, obtained using our custom-built PS-OCT setup, for multilayered birefringent structures demonstrate the applicability of the PS-OCT to characterization of multilayered material stacks containing birefringent polymer layers used e.g. in display technology. In this Letter we present some aspects of our research and experiments and discuss usefulness of polarization sensitive analysis in OCT for examination of technical materials. -
Non-destructive detection of defects in artificial skin tissue by optical coherence tomography
Explore Article SPIE Digital Library (Jul 13 2009)
The application of optical coherence tomography OCT in tissue engineering facilities offers great potential for the automated detection of defects or inhomogeneities in tissue products. This non-invasive and non-destructive measurement technique enables the high speed generation of two dimensional cross sections of tissue with micron resolution. The integration of an OCT device into a tissue production facility allows the monitoring and quality control of tissue engineering products. By the selective exclusion of tissue products with insufficient quality features a high degree in production standard is guaranteed. In a first study, OCT tomograms of artificial skin equivalents were acquired and compared ... -
An investigation of the accelerated thermal degradation of different epoxy resin composites using x-ray micro computed tomography and optical coherence tomography
Explore Article ScienceDirect (Jun 27 2009)
Epoxy resin composites reinforced with hollow glass microspheres, microlight microspheres, 3D parabeam glass, and E-Glass individually were subjected to accelerated thermal degradation conditions. X-ray micro computed tomography (XμCT) was used to evaluate density changes, reinforcement filler damage, homogeneity, cracks and microcracks in the bulk of the different epoxy resin composites. XμCT 3D images, 2D reconstructed images and voids calculations revealed microspheres damage, filler distributions and showed cracks in all composites with different shapes and volume in response to the thermal degradation conditions. In addition, expansion of air bubbles/voids was observed and recorded in the microsphere and microlight epoxy composite samples. ...Comment on Article Mentions: Upper Austrian Research GmbH David Stifter Karin Wiesauer
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Roughness measurement methodology according to DIN 4768 using optical coherence tomography (oct)
Explore Article SPIE Digital Library (Jun 15 2009)
Measure roughness in some sort of samples can present several problems when it is done in traditional way (with physical contact). For instance, soft samples will present at least two kinds of problem: (a) the value presented by the equipment not represents the sample roughness; (b) the equipment ca ... [Proc. SPIE 7390, 73900Z (2009)] published Mon Jun 15, 2009.Comment on Article Mentions: Thorlabs
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Masmicro micro-/nano-materials processing, analysis, inspection and materials knowledge management
Explore Article SpringerLink Home (Jun 4 2009)
Abstract The main goals of the ‘Material Innovation and Testing’ within MASMICRO are the identification of the miniature/micro-materials which are formable, development of new materials for forming and machining, development of an integrated material-testing system and study of material properties for design/analysis applications. Examples of collaborative work and results are presented regarding the processing of functional electrospun polymer micro-/nano-fibre structures and the characterization of their interface properties with tribological testing. By means of optical coherence tomography, a non-destructive inspection approach for these micro-/nano-structured webs was developed and it is also documented in the paper. Further, an application example of artificial ...Comment on Article Mentions: Upper Austrian Research GmbH David Stifter Karin Wiesauer
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Dear Prof. Dr. Gary S. Mintz, You are an extraordinary expert in imaging, an intelligence ...
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