Academic literature on the topic 'Optical fiber bundles'
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Journal articles on the topic "Optical fiber bundles"
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Gorris, Hans H., Timothy M. Blicharz, and David R. Walt. "Optical-fiber bundles." FEBS Journal 274, no. 21 (October 12, 2007): 5462–70. http://dx.doi.org/10.1111/j.1742-4658.2007.06078.x.
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Aleksić, R., and R. M. Jančić. "Coherent Optical Fiber Bundles Production." Materials Science Forum 214 (May 1996): 73–80. http://dx.doi.org/10.4028/www.scientific.net/msf.214.73.
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Orth, A., M. Ploschner, E. R. Wilson, I. S. Maksymov, and B. C. Gibson. "Optical fiber bundles: Ultra-slim light field imaging probes." Science Advances 5, no. 4 (April 2019): eaav1555. http://dx.doi.org/10.1126/sciadv.aav1555.
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Optical fiber bundle microendoscopes are widely used for visualizing hard-to-reach areas of the human body. These ultrathin devices often forgo tunable focusing optics because of size constraints and are therefore limited to two-dimensional (2D) imaging modalities. Ideally, microendoscopes would record 3D information for accurate clinical and biological interpretation, without bulky optomechanical parts. Here, we demonstrate that the optical fiber bundles commonly used in microendoscopy are inherently sensitive to depth information. We use the mode structure within fiber bundle cores to extract the spatio-angular description of captured light rays—the light field—enabling digital refocusing, stereo visualization, and surface and depth mapping of microscopic scenes at the distal fiber tip. Our work opens a route for minimally invasive clinical microendoscopy using standard bare fiber bundle probes. Unlike coherent 3D multimode fiber imaging techniques, our incoherent approach is single shot and resilient to fiber bending, making it attractive for clinical adoption.
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Cheng, Zhou, Shinji Fujiwara, Yoshito Ohtani, and Kazuhiko Sameshima. "A New Method of Sample Preparation for Kenaf Bast Fiber Length Analysis with Automated Fiber Length Analyzer." Holzforschung 54, no. 2 (February 29, 2000): 213–18. http://dx.doi.org/10.1515/hf.2000.036.
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Summary Kenaf bast fiber bundles alternate radially in layers accompanied by sieve elements and phloem parenchyma cells. Fiber bundles are about 20 % in the area of a cross section of kenaf bast. Four sample preparation methods for kenaf bast fiber length analysis with an automated fiber length analyzer were compared and a new sample preparation method including three steps was proven to be accurate. Fiber bundles were obtained by acidified sodium chlorite treatment and an additional ammonium oxalate treatment. Following a 1% sodium hydroxide treatment, fiber bundles were completely separated into single fibers with no damage. Fiber length values of this method were more accurate and reliable than other three sample preparation methods and manual measurement with optical microscope.
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Sharp, Nathan, Johnathan Goodsell, and Anthony Favaloro. "Measuring Fiber Orientation of Elliptical Fibers from Optical Microscopy." Journal of Composites Science 3, no. 1 (March 2, 2019): 23. http://dx.doi.org/10.3390/jcs3010023.
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The orientation of fibers with elliptical cross-sections cannot be estimated using standard optical microscopy analysis methods in which the ratio of the minor-axis to the major-axis and orientation of the major-axis are directly used to determine the fiber spherical coordinates, θ and ϕ . A new method for estimating the orientation of fibers with elliptical cross-sections is presented and validated using both simulations and experiments. Fibers with elliptical cross-sections rather than circular possess a roll degree of freedom, which significantly affects the dimensions of projected cross-sections in viewing planes. The equations of the projected ellipse of an elliptic cylinder onto a viewing plane are determined in terms of typical spherical coordinate system angles, θ and ϕ , the roll angle, α , and the fiber semi-major and semi-minor diameters. Fiber angles are determined by numerical fitting of the developed equations to measured ellipses. An ambiguity in the determined angles is identified, and, in the special case of fiber bundles, a scheme is presented by which the ambiguity can be resolved. Validation experiments showed that the method is quite effective at estimating fiber orientation from micrographs when fiber cross-section dimensions are measured beforehand, and the additional ambiguity is resolved easily in the case of fiber bundles.
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Desmet, Cloé, Karim Vindas, Ricardo Alvarado Meza, Patrick Garrigue, Silvia Voci, Neso Sojic, Ali Maziz, et al. "Multiplexed Remote SPR Detection of Biological Interactions through Optical Fiber Bundles." Sensors 20, no. 2 (January 16, 2020): 511. http://dx.doi.org/10.3390/s20020511.
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The development of sensitive methods for in situ detection of biomarkers is a real challenge to bring medical diagnosis a step forward. The proof-of-concept of a remote multiplexed biomolecular interaction detection through a plasmonic optical fiber bundle is demonstrated here. The strategy relies on a fiber optic biosensor designed from a 300 µm diameter bundle composed of 6000 individual optical fibers. When appropriately etched and metallized, each optical fiber exhibits specific plasmonic properties. The surface plasmon resonance phenomenon occurring at the surface of each fiber enables to measure biomolecular interactions, through the changes of the retro-reflected light intensity due to light/plasmon coupling variations. The functionalization of the microstructured bundle by multiple protein probes was performed using new polymeric 3D-printed microcantilevers. Such soft cantilevers allow for immobilizing the probes in micro spots, without damaging the optical microstructures nor the gold layer. We show here the potential of this device to perform the multiplexed detection of two different antibodies with limits of detection down to a few tenths of nanomoles per liter. This tool, adapted for multiparametric, real-time, and label free monitoring is minimally invasive and could then provide a useful platform for in vivo targeted molecular analysis.
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Haibin Ni, Ming Wang, Long Li, Wei Chen, and Tingting Wang. "Photonic-Crystal-Based Optical Fiber Bundles and Their Applications." IEEE Photonics Journal 5, no. 4 (August 2013): 2400213. http://dx.doi.org/10.1109/jphot.2013.2267534.
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Fernandez, P. R., J. L. Lazaro, A. Gardel, O. Esteban, A. E. Cano, and P. A. Revenga. "Location of Optical Fibers for the Calibration of Incoherent Optical Fiber Bundles for Image Transmission." IEEE Transactions on Instrumentation and Measurement 58, no. 9 (September 2009): 2996–3003. http://dx.doi.org/10.1109/tim.2009.2016807.
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Ford, Helen D., and Ralph P. Tatam. "Characterization of optical fiber imaging bundles for swept-source optical coherence tomography." Applied Optics 50, no. 5 (February 3, 2011): 627. http://dx.doi.org/10.1364/ao.50.000627.
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Lewis, Michael R., and Robert Josephs. "Cryo-electron microscopy of deoxy-sickle hemoglobin fibers." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 2 (August 1992): 1036–37. http://dx.doi.org/10.1017/s0424820100129814.
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Sickle cell disease is caused by the self assembly of deoxy-sickle hemoglobin (HbS) into fibers which rigidify and distort red cells. Fiber assembly is auto-catalytic in that the surface of existing fibers acts as a nucleating template for the assembly of new fibers (heterogeneous nucleation). Thus fibers are found typically as bundles of aligned particles. Understanding fiber-fiber interaction is crucial to understanding the pathology of fiber formation. Moreover, disrupting fiber-fiber interactions would likely ameliorate the severity of the disease. We have obtained images of both laterally associated and isolated fibers by cryo-electron microscopy (Figure 1). Optical diffraction indicates that laterally associated fibers tend to have much better long range order than isolated fibers. This observation suggests that deoxy-HbS fibers are more disordered when they are not mechanically coupled by inter-fiber contacts. In this study we assess the effects of fiber-fiber interactions on torsional disorder of deoxy-HbS fibers.
Dissertations / Theses on the topic "Optical fiber bundles"
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Dujon, Gregory Francis. "Calibration of incoherent optical fibre bundles for image transmission." Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334005.
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Sarantavgas, Georgios. "Investigation of a fibre-optic Fizeau interferometer configuration and coherent fibre-optic imaging bundles for optical coherence tomography." Thesis, Cranfield University, 2008. http://hdl.handle.net/1826/3759.
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Currently several medical imaging techniques are in operation in clinical
environments that help the doctors to diagnose diseases before proceeding to
treatment. This research investigated and implemented configurations for a medical
imaging technique called Optical Coherence Tomography (OCT).
The Michelson interferometer has been the principal configuration for OCT systems.
For endoscopic OCT applications though such a configuration is susceptible to
polarisation induced signal fading due to environmental changes within the sample
arm, like fibre bending and temperature fluctuations. The development and testing of
a Fizeau interferometer based OCT system demonstrate the elimination of this
polarisation induced signal fading as the sample and reference arm of the
interferometer experience the same environmental changes. The Fizeau interferometer
is formed between the end of the fibre and the sample itself. A secondary processing
interferometer is used in this configuration, to compensate the path difference inherent
to the Fizeau configuration. Longitudinal resolution is about 19 m in air, and lateral
resolution about 23 m. A signal-to-noise ratio of about 80 dB was achieved with this
system and several sets of image data were collected from laboratory and biological
samples.
An OCT system based on a Fizeau interferometer incorporating a coherent fibre
imaging bundle was also investigated. Fibres in the bundle are accessed sequentially
by a beam focused onto the input face of the bundle, allowing 2D information to be
acquired using point detection. Incorporating a fibre optic imaging bundle in Fizeau
based interferometer OCT allows mechanical scanning parts to be removed from the
sample arm, resulting in a passive probe. Such a configuration can form a compact,
robust and “downlead insensitive” OCT system and is a strong candidate for in vivo
applications. The performance of leached and wound coherent fibre optic bundles was
accessed and an analysis is presented. The longitudinal resolution of the system
developed was about 10 m in air, and lateral resolution about 9 m. This thesis
demonstrates several sets of image data that were collected from various samples
using a Fizeau interferometer based OCT incorporating coherent imaging bundles. 2D
image data captured by such a configuration are presented and reported for the first
time in this thesis.
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Makhlouf, Houssine. "Integrated Multi-Spectral Fluorescence Confocal Microendoscope and Spectral-Domain Optical Coherence Tomography Imaging System for Tissue Screening." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/202761.
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A multi-modality imaging system intended for clinical utilization has been developed. It is constructed around an existing fiber-bundle-based fluorescence confocal microendoscope. Additional imaging modalities have been implemented to expand the capabilities of the system and improve the accuracy of disease diagnosis. A multi-spectral mode of operation is one such modality. It acquires fluorescence images of a biological sample across a spectral range of sensitivity and explores the collected image data at any specified wavelength within that spectral range. Cellular structures can be differentiated according to their spectral properties. The relative distribution and concentration of the different cellular structures can potentially provide useful pathologic information about the imaged tissue. A spectral-domain optical coherence tomography (SDOCT) modality is another imaging technique integrated into the system. It provides a cross-sectional imaging perspective that is comparable to microscopic images obtained from histology slides and complementary to the en face view obtained from the confocal imaging modality. The imaging system uses a parallelized architecture (fiber-optic bundle, line of illumination) to increase the data acquisition speed. A one-dimensional scan is needed to capture 2D images in the confocal modality or a 3D data cube (two spatial dimensions and one spectral dimension) in the multi-spectral mode of operation. No scanning is required to capture a 2D OCT image. The fiber-bundle design is particularly critical for the SDOCT modality as it paves the way to novel fast endoscopic OCT imaging that has a high potential for translation into the clinic. The integrated multi-modality imaging system can readily switch between different imaging modalities, which will make it a powerful diagnostic tool in a clinical environment. It can provide valuable information about the morphology, the spectral and biochemical features, and the macroscopic architecture of tissue. It is believed that fast and accurate disease diagnosis can potentially be made based on all these characteristics.
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Wu, Tzu-Yu. "Design of Confocal Microendscopy for Fallopian Tube Imaging and Detection of Esophageal Cancer." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/347227.
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This work presents several major developments related to a fluorescence confocal microendoscope technology that can provide instantaneous cellular level images from selected depths of tissue inside the human body. The confocal microendoscope systems discussed employ fiber-optic based imaging catheters coupled to custom built slit-scan confocal microscopes. One major new development involves the design, development, and testing of a new flexible confocal microgastroscope (CMG) system for imaging the esophagus. This new system has the potential to aid in the early detection of esophageal cancer. It consists of a new optical scan unit mounted on an endoscopy cart and a new flexible catheter that can be inserted through the instrument channel of a commercial gastroscope. The CMG system has higher spatial resolution and larger field of view than the previous generation clinical confocal microendoscopes in our lab. In addition, the new CMG system can be operated over a greater wavelength range than its predecessor. Central to the CMG system is the design, construction, and testing of a new distal miniature objective that enables high-quality microendoscopy. The miniature objective, built with all glass spherical surfaces, achieves diffraction-limited performance over a 486 to 1000 nm spectral range. The wide achromatic range of this lens allows the CMG system to be used with a variety of contrast agents including agents in the NIR region. In addition, the new miniature objective can be mounted on existing confocal microendoscopes in our lab such as the ovarian clinical confocal microlaparoscope and our laboratory based experimental system. Finally, a new confocal microlaparoscope with an articulating catheter capable of imaging inside the distal portion of fallopian tubes is presented. This instrument is intended to allow the detection of early stage ovarian cancer originating inside the fallopian tube. The new microlaparoscope is compatible with 5 mm trocars and includes a thin 2.2 mm diameter articulating distal tip consisting of a bare fiber bundle and an automated dye delivery system. The distal tip of this new endoscope can be articulated through simple wrist movements and locked in place at a given angle if desired. The thin distal tip and the ability to control the angle of the tip provide the size and flexibility needed to image inside the curved and delicate structures of the fallopian tube. Preliminary imaging results from the new CMG system, the achromatized miniature objective, and the new articulating confocal microlaparoscope are presented to demonstrate the performance and the potential of each system towards the overall goal of in vivo imaging and disease diagnosis.
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Adam, Catherine. "Réseaux nanostructurés de fibres optiques pour la réalisation de capteurs électrochimiques et luminescents." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00933333.
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La structuration et la fonctionnalisation de réseaux de fibres optiques ont été utilisées afin de réaliser différents capteurs électrochimiques et luminescents. Ce type de support permet de concevoir des capteurs capables de détecter à distance dans un milieu confiné, difficilement accessible ou dangereux. Deux capteurs pour la détection du mercure cationique (Hg2+) sont décrits dans cette thèse. Le premier utilise un dérivé de la rhodamine, qui est lié de façon covalente à la surface en verre du réseau, par silanisation. Le signal fluorescent de cette sonde est augmenté en présence de mercure ce qui permet de le quantifier. Le second capteur combine l'électrochimie sur ces réseaux de fibres optiques, grâce à une fine couche conductrice déposée à sa surface. Le réseau est ensuite modifié avec un complexe de Ruthénium(II), qui peut être électropolymérisé par l'intermédiaire de la fonction cyclopentadithiophène (CPDT). La détection du mercure est alors réalisée par électrochimiluminescence (ECL), qui est collectée à distance, grâce aux propriétés électro-modulables du film polymère. Les réseaux de fibres optiques nanostructurés ont également été utilisés pour la réalisation d'une sonde SECM, présentant un réseau dense de nanoélectrodes collectives. La réalisation d'un tel outil utilise le positionnement basé sur les forces de cisaillement et peut être utilisé pour la structuration de surfaces conductrices ou isolantes par SECM.
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Negoro, Hiromitsu. "Involvement of urinary bladder Connexin43 and the circadian clock in coordination of diurnal micturition rhythm." Kyoto University, 2013. http://hdl.handle.net/2433/180350.
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Deiss, Frédérique. "Développement de réseaux multiplexés de biocapteurs électrochimiques." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13883/document.
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Ce travail de thèse a porté sur le développement de réseaux de micro- et nanocapteurs opto-électrochimiques pour la bioanalyse. Ils répondent à la demande grandissante dans le domaine de la recherche et du diagnostic pour des outils permettant de réaliser de multiples analyses simultanément avec des échantillons de faibles volumes. Ces nouvelles biopuces de haute densité sont fabriquées à partir de faisceaux cohérents de fibres optiques. Une des deux faces est micro- ou nanostructurée par une attaque chimique, puis fonctionnalisée avec une sonde biologique. La première biopuce est un réseau de nanocapteurs fluorescents à ADN où les sondes ont été immobilisées grâce aux propriétés d’électropolymérisation du pyrrole. La lecture est réalisée à distance au travers du faisceau d’imagerie. En combinant la technique d’immobilisation avec des microleviers électrochimiques, plusieurs sondes différentes ont pu être adressées sur le même réseau nanostructuré. La seconde biopuce permet d’effectuer des immunodosages multiplexés en utilisant l’imagerie électrochimiluminescente résolue à l’échelle d’une microsphère. Le développement de cette technique permet de combiner les avantages de l’électrochimiluminescence avec des immunodosages multiplexés. L’élaboration de ces réseaux allie différentes techniques physico-chimiques, notamment électrochimiques, pour obtenir des biopuces avec un fort potentiel, grâce à une densité et un degré de multiplexage importantsThis work presents the development of optoelectrochemical micro- and nanosensor arrays for bioanalytical applications. These platforms respond to the growing need in research and diagnostic for tools allowing multiple and simultaneous analysis in small-volume samples. These new high density biochips are made from coherent optical fiber bundles: one face is micro- or nanostructured by chemical etching and then functionnalized with biological probes. The first biochip is a fluorescent DNA nanosensor array where probes have been immobilized by electrodeposition of a polypyrrole thin film. The detection of the hybridization is remotely performed through the imaging fiber. Different probes were succesfully addressed onto the same nanostructured array thanks to electrochemical cantilevers. The second biochip allows multiplexed sandwich immunoassays using electrochimiluminescent imaging resolved at the single bead level. In particular, the development of this new readout mechanism allows extending electrochemiluminescent detection for multiplexed immunoassays. Design and implementations of both platforms take advantages of different physical and chemical techniques, especially electrochemical, to obtain biochips with a great potential through high density and high multiplexing level
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Li, Haidong. "Electrogenerated chemiluminescence : from materials to sensing applications." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0560/document.
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Le phénomène d’électro chimiluminescence (ECL), également appelé chimiluminescence électrogénérée, consiste en la génération de l’état excité d’un émetteur suite à des réactions de transfert d’électrons se produisant initialement à la surface de l’électrode. L’état excité ainsi produit retourne à l’état fondamental en émettant de la lumière. Les réactions ECL se classent principalement en 2 grandes voies mécanistiques: les réactions d’annihilation et les réactions impliquant un co-réactif sacrificiel. Cette dernière voie a conduit à de très nombreuses applications en chimie analytique. Dans ce manuscrit, j’ai présenté mes travaux de thèse qui ont suivis 3 directions complémentaires depuis l’échelle moléculaire jusqu’à l’échelle macroscopique: la recherche de nouveaux luminophores ECL, l’étude de films d’hydrogels stimulables et le développement de nouvelles applications analytiques de l’ECL.Dans une première partie, j’ai étudié les propriétés ECL de 3 types de luminophores organiques. Ces composés ont montré des caractéristiques électrochimiques et ECL remarquables. L’efficacité ECL de ces luminophores organiques peut être modulée enjouant sur leurs structures respectives. Des luminophores de type spirofluorène ont produit une émission ECL très intense et les nanoparticules organiques correspondantes ont pu être utilisées comme nano-émetteurs ECL. L’étude des propriétés électrochimiques, photochimiques et ECL de luminophores cationiques de type triangulène et hélicène a été réalisée et présentée avec un formalisme montrant un «mur» ECL ou une cartographie ECL complète.Dans une seconde partie, la préparation de films d’hydrogels thermo-stimulables à base de poly(N-isopropylacrylamide) ou pNIPAM incorporant des centres redoxRu(bpy)3 a été réalisée sur des électrodes de carbone vitreux (GCE) et aussi sur des fibres de carbone par polymérisation radicalaire induite électrochimiquement. Les études ECL sur les GCEs modifiées ont montré que le facteur principal gouvernant les propriétés ECL est la distance entre les sites Ru(bpy)3. Le dépôt de tels films de pNIPAM-Ru(bpy)3 par électrochimie bipolaire ouvre de nouvelles possibilités pour le développement de micro-objets stimulables hybrides. Dans une dernière partie, comme la chimie analytique constitue un des plus importants attraits de l’ECL, deux applications analytiques sont présentées en utilisant,d’une part, des co-réactifs de type amine modifié par l’acide phénylboronique, et,d’autre part, des faisceaux de fibres optiques recouverts d’or. La réaction de complexation de saccharides par le groupe phénylboronique modifie les propriétés électrochimiques du co-réactif amine en rendant son oxydation à l’électrode inefficace,ce qui provoque la diminution du signal ECL. En changeant la longueur de l’espaceur de ces co-réactifs qui portent deux groupements phénylboroniques, nous avons pu mesurer sélectivement la concentration de D-glucose et de D-fructose. Mon travail a enfin porté sur le développement d’un objet analytique basé sur un faisceau de fibresoptiques doré qui est adressé sans contact par électrochimie bipolaire. L’ECL ainsi générée du système Ru(bpy)32+/TPrA a permis de réaliser un outil activable à distance permettant une mesure déportée via le faisceau. Ce nouvel objet analytique original devrait permettre d’étendre les mesures ECL à des environnements confinés ou dangereuxElectrogenerated chemiluminescence (ECL) involves the energetic electron transfer reactions at the electrode with the generation of excited state of emitter, which then relax to the ground state and emit light. These ECL reactions can be divided into two main pathways: the annihilation and sacrificial co-reactant reactions. The latter has found a lot of applications in analytical chemistry. In this thesis, ECL studies towardt hree complementary directions are presented, ranging from the molecular scale tomacroscopic scale : the research of new ECL luminophores, the study of stimuli-responsive hydrogel films, and the development of new ECL assays.Firstly, I have studied three types of organic dyes for ECL investigations. These organic dyes exhibit interesting electrochemical and ECL properties. ECL efficiencies of the organic dyes can be tuned by the modification of the structures. Spirofluorene dyes show strong ECL emission, and thus its fluorescence organic nanoparticles(FONs) prepared in water were used as ECL nano-emitters. We also established an energetic ECL “wall” representation and then move forward creating ECL “map”upon electrochemical, photoluminescence and ECL studies on cationic triangulenes and cationic helicenes dyes, respectively.Secondly, the preparation of thermo-responsive poly(N-isopropylacrylamide)(pNIPAM) hydrogel films covalently incorporating Ru(bpy)3 redox centers were achieved on glassy carbon electrode (GCE) or carbon fiber by electrochemically induced free radical polymerization. ECL studies on the modified GCEs have provided the main factor (the average distance of Ru(bpy)3 sites) that governs the ECL process, leading to deciphering the enhanced ECL in the films. The deposition of the films on carbon fiber by bipolar electrochemistry (BPE) has opened new route to for the development of smart hybrid micro objects. Finally, analytical application is one of the most important features of ECL. We presented two different ECL assays using either the phenylboronic acid modified amine based co-reactants or gold coated optical fiber bundle. The binding of saccharides with boronic acid modified tertiary amines makes the oxidation of amines group inefficient, which decreases ECL signal response. By changing linker length of a bis-boronic acid amine co-reactant, we are able to determine D-glucose and D-fructose selectively. We also studied the ECL generation of Ru(bpy)32+/TPrA systemon the gold coated optical fiber bundle in a wireless manner by BPE, then transmission and remote detection at the opposite end of the same object. This methodmay extend the applicability of ECL assays in the confined or hazardous environments
电化学发光（ECL）的发生是由于在电极表面通过电子转移反应生成了发光体的激发态跃迁到基态，并伴随着发光。这些电子转移反应可划分为两种主要的途径：正负自由基湮灭反应和共反应物反应。而后者被广泛应用于分析化学领域。在本论文中，我们在电化学发光领域中进行了广泛的研究，具体有三个研究方向：新型电化学发光光团的研究、响应水凝胶膜的制备以及电化学发光分析的研究。首先，我们选择了三种不同类型的有机荧光分子用于电化学发光的研究。这些有机荧光分子展现出许多电化学和电化学发光特性。其中，螺芴荧光分子展现出了非常强的电化学发光。而且用它制备的荧光有机纳米颗粒（FONs）在水相中也可以产生电化学发光。基于对阳离子型三角烯和阳离子型螺烯的电化学、光谱学以及电化学发光的研究，我们分别建立了鉴别电化学发光“墙”和“图谱”。其次，利用自由基电聚合的方法，我们实现了在玻碳电极和碳纤维表面上制备热刺激-响应的聚异丙基丙烯酰胺（p-NIPAM）共价嫁接三联吡啶钌Ru(bpy)3 荧光分子的水凝胶膜。通过对玻碳电极上水凝胶膜的电化学发光的研究，我们发现了控制水凝胶膜中电化学发光的主要因素，从而揭秘了水凝胶膜中电化学发光增强的成因。而且，利用双电极化学（BPE）的方法，我们将此类水凝胶膜的制备应用于碳纤维上，以发展灵敏杂化微米级器件。最后，鉴于化学分析是电化学发光最重要的特征，我们构建两种不同的电化学发光分析体系：一种是基于硼酸化学修饰的三丙胺共反应物；另一种是利用镀金光导纤维。硼酸对糖类的结合弱化了三丙胺的电化学氧化效率，因此影响电化学发光的强度。通过改变双硼酸修饰共混物之间碳链的长度，我们实现了对葡萄糖和果糖的选择性检测。我们还研究了在镀金光导纤维上三联吡啶钌/三丙胺体系的 电化学发光。此研究是在双电极体系进行的，镀金光导纤维无需外部接线，镀金部位产生的发光透过光纤传输的光纤的远端，再进行检测，因此达到了电化学发光的远程检测。这一方法可应用于狭窄危险环境中的电化学发光分析。
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LIN, YU-SHIANG, and 林于翔. "Optical Design for An Optical Fiber Bundle in An Inspection Light Source ─ Based on Light Ray Grouping by Angular Partition." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/f6wr2e.
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碩士南臺科技大學
光電工程系
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LEDs are replacing halogen and fluorescent bulbs with an ever greater pace in the visual inspection systems application due to its dramatic enhancement in brightness latterly. In traditional optical design, the light source halogen/fluorescent bulb in a visual inspection system is considered as a point source; imaging optical design approach is adopted. However, it overlooks the role of angular distribution of light rays in the design. This does not fulfill the needs for designing optical systems with angular bound, in most cases narrow angular bound, such as exposure light sources of light photolithography, telecentric lens, etc. As opposed to imaging optical design method, we proposed a novel design method based on the concept of light ray grouping by angular partition (LRGAP) in this study. Surface light sources were assumed, and the utilization efficiency of individual angular light ray group under the angular bounds of specification was closely monitored throughout each interface of an optical system. The implementation of the concept of LRGAP in the optical design of an optical system was divided into two stages. In the first stage, angular response tests for each individual light-ray group were performed on both categories of a single interface and two interfaces of a lens with various radii of curvatures. Its purpose was to collect, examine, and analyze the output dynamic range of angular bound for each individual light-ray group input in order to serve as a foundation and direction for optical design of a more complex optical system. These tests were executed through the application of CAD software by its calculation function on propagation angle of light rays in the mechanical layout of an optical system. Similar to light rays propagation in sequential optics, in the second stage, angular response tests for each individual light-ray group based on LRGAP was performed sequentially on each interface of lenses interface by interface in a lens system. In addition, ASAP optical simulations were implemented in the design process too, not only to verify the angular response tests for each lens sequentially but also account their corresponding light collection efficiency within specified angular bound. To achieve viable design, exceeding given specification, at least two design iterations was carried out. A practical optical design of a coupling lens system for an LED light source driving an optical fiber bundle was performed to illustrate the feasibility and effectiveness of our devised design method based on LRGAP. The SMD LED had a rectangular dimension of 6.5 × 6.5 mm. The specification required minimal 50% light efficiency entering into both two types of optical fiber bundles with bundle diameter of 10 mm and 13 mm, respectively, at light input bundle area3 mm from the coupling lens system. The acceptance angle of both types of optical fiber bundles was 40°. The entering light efficiency of 53% for 10-mm optical fiber bundle and 60% for 13-mm one were achieved with only two lens being used. As an angle-oriented optical design method, the optical design method based on LRGAP concept exhibits brilliant ability of manipulation on angular distribution of light within angular bound in an optical system design by its angular response tests for each individual light-ray group. However, further improvement in methodology is needed to advance its applications.
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Cheloni, Riccardo, and Jonathan Denniss. "Depth-resolved variations in visibility of retinal nerve fibre bundles across the retina in enface OCT images of healthy eyes." 2020. http://hdl.handle.net/10454/18175.
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YesRecent developments in optical coherence tomography (OCT) technology enable direct enface visualisation of retinal nerve fibre bundle (RNFB) loss in glaucoma. However, the optimum depth at which to visualise RNFBs across the retina is unknown. We aimed to evaluate the range of depths and optimum depth at which RNFBs can be visualised across the retina in healthy eyes. The central ± 25° retina of 10 healthy eyes from 10 people aged 57–75 years (median 68.5 years) were imaged with spectral domain OCT. Slab images of maximum axial resolution (4 μm) containing depth‐resolved attenuation coefficients were extracted from 0 to 193.5 μm below the inner limiting membrane (ILM). Bundle visibility within 10 regions of a superimposed grid was assessed subjectively by trained optometrists (n = 8), according to written instructions. Anterior and posterior limits of RNFB visibility and depth of best visibility were identified for each grid sector. Effects of retinal location and individual eye on RNFB visibility were explored using linear mixed modelling with likelihood ratio tests. Intraclass correlation coefficient (ICC) was used to measure overall agreement and repeatability of grading. Spearman’s correlation was used to measure correlation between depth range of visible RNFBs and retinal nerve fibre layer thickness (RNFLT). Retinal location and individual eye affected anterior limit of visibility (χ2(9) = 58.6 and 60.5, both p < 0.0001), but none of the differences exceeded instrument resolution, making anterior limit consistent across the retina and different eyes. Greater differences were observed in the posterior limit of visibility across retinal areas (χ2(9) = 1671.1, p < 0.0001) and different eyes (χ2(9) = 88.7, p < 0.0001). Optimal depth for visualisation of RNFBs was around 20 µm below the ILM in most regions. It varied slightly with retinal location (χ2(9) = 58.8, p < 0.0001), but it was not affected by individual eye (χ2(9) = 10.7, p = 0.29). RNFB visibility showed good agreement between graders (ICC 0.89, 95%CI 0.87–0.91), and excellent repeatability (ICC 0.96–0.99). Depth range of visible RNFBs was highly correlated with RNFLT (ρ = 0.9, 95%CI: 0.86–0.95). The range of depths with visible RNFBs varies markedly across the healthy retina, consistently with RNFLT. To extract all RNFB information consistently across the retina, slab properties should account for differences across retinal locations and between individual eyes.
This work was supported by a College of Optometrists Research Fellowship (JD).
The full-text of this article will be released for public view at the end of the publisher embargo on 5th Nov 2021.
Books on the topic "Optical fiber bundles"
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Johnson, Christopher. Optical fiber, cable, and bundles. Washington, D.C: Office of Industries, U.S. International Trade Commission, Dept. of Commerce, 1995.
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Keoghane, Stephen, and Mark Sullivan. The principles of endourology. Edited by John Reynard. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199659579.003.0032.
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The chapter discusses the principles of endourology outlining the principles behind the sub-specialty. Topics disused include endoscopes, cystoscopes, rigid and semi-rigid ureteroscopes, flexible ureterorenoscopes, rigid and flexible nephroscopes, disposable equipment, integrated operating theatres, narrow band imaging (NBI), theatre ergonomics, and antibiotics. Urologic endoscopes are generally of two optical designs: the rigid, rod lens system described by Hopkins, while fibre-optic imaging bundles are used in both rigid and flexible endoscopes. The rod lens system consists of a series of glass rods with polished ends with the key feature of air gaps that act as a lens. Light is carried efficiently along the rod, resulting in a clear and bright image.
Book chapters on the topic "Optical fiber bundles"
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Weik, Martin H. "optical fiber bundle." In Computer Science and Communications Dictionary, 1167. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_12989.
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Weik, Martin H. "fiber optic bundle." In Computer Science and Communications Dictionary, 583. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6910.
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Weik, Martin H. "fiber optic bundle transfer function." In Computer Science and Communications Dictionary, 583. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6911.
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Katzir, Abraham. "Optical Fiber Bundles." In Lasers and Optical Fibers in Medicine, 140–55. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-08-092397-0.50011-x.
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Mayer, Hylton R., and Marc L. Weitzman. "Automated Perimetry in Glaucoma." In Visual Fields. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195389685.003.0009.
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Clinical experience and multiple prospective studies, such as the Collaborative Normal Tension Glaucoma Study and the Los Angeles Latino Eye Study, have demonstrated that the diagnosis of glaucoma is more complex than identifying elevated intraocular pressure. As a result, increased emphasis has been placed on measurements of the structural and functional abnormalities caused by glaucoma. The refinement and adoption of imaging technologies assist the clinician in the detection of glaucomatous damage and, increasingly, in identifying the progression of structural damage. Because visual field defects in glaucoma patients occur in patterns that correspond to the anatomy of the nerve fiber layer of the retina and its projections to the optic nerve, visual functional tests become a link between structural damage and functional vision loss. The identification of glaucomatous damage and management of glaucoma require appropriate, sequential measurements and interpretation of the visual field. Glaucomatous visual field defects usually are of the nerve fiber bundle type, corresponding to the anatomic arrangement of the retinal nerve fiber layer. It is helpful to consider the division of the nasal and temporal retina as the fovea, not the optic nerve head, because this is the location that determines the center of the visual field. The ganglion cell axon bundles that emanate from the nasal side of the retina generally approach the optic nerve head in a radial fashion. The majority of these fibers enter the nasal half of the optic disc, but fibers that represent the nasal half of the macula form the papillomacular bundle to enter the temporal-most aspect of the optic nerve. In contrast, the temporal retinal fibers, with respect to fixation, arc around the macula to enter the superotemporal and inferotemporal portions of the optic disc. The origin of these arcuate temporal retinal fibers strictly respects the horizontal retinal raphe, temporal to the fovea. As a consequence of this superior-inferior segregation of the temporal retinal fibers, lesions that affect the superotemporal and inferotemporal poles of the optic disc, such as glaucoma, tend to cause arcuateshaped visual field defects extending from the blind spot toward the nasal horizontal meridian.
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Simon, David S. "Fiber bundles, curvature, and holonomy." In Topology in Optics (Second Edition). IOP Publishing, 2021. http://dx.doi.org/10.1088/978-0-7503-3471-6ch4.
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Simon, David S. "Fiber bundles, curvature, and holonomy." In Tying Light in Knots: Applying topology to optics. IOP Publishing, 2018. http://dx.doi.org/10.1088/2053-2571/aaddd5ch4.
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Raisinghani, Mahesh S., and Hassan Ghanem. "A Managerial Analysis of Fiber Optic Communications." In Encyclopedia of Multimedia Technology and Networking, Second Edition, 866–72. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch118.
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A form of fiber-optic communication delivery in which an optical fiber is run directly onto the customers’ premises is called Fiber to the Premises (FTTP). This contrasts with other fiber-optic communication delivery strategies such as Fiber to the Node (FTTN), Fiber to the Curb (FTTC), or Hybrid Fiber-Coaxial (HFC), all of which depend upon more traditional methods such as copper wires or coaxial cable for “last mile” delivery (Fiber to the Premises, 2007). While high-speed fiber-optic cables are more often used to provide the primary links, the “last mile” to each home still plays an important role in the quality of service and bringing high-speed broadband to an area that is largely dependent on this last-mile connection. FTTP involves laying optical fiber from a central location (switch) to a termination point (the home or business), and could potentially deliver broadband at speeds of up to 100Mbps. The actual speed is determined by the size of the Passive Optical Network (PON). The technology is capable of transmitting data at speeds of up to 2.5Gbps; this amount is divided by the number of termination points on the PON to determine the actual bandwidth to each end point. Replacing copper infrastructures with fiber to every home in an area is an expensive proposition, but the rewards could be great for telecom providers. An FTTP infrastructure would enable those providers to not only provide high-speed broadband; they could also expand into other areas such as cable programming. The Baby Bells have another incentive to roll out FTTP as well; the FCC requires them to share their copper wires with their competitors, but that requirement would not apply to new FTTP infrastructures. This ruling gives providers a major incentive to roll out FTTP, despite the large initial investment that is required. Copper, the predominant connection to the home used today, has inherent limitations both in terms of length from home to switch, and amount of bandwidth that is provided. FTTP also has a great advantage over Digital Subscriber Line (DSL), which provides broadband over existing copper, because DSL infrastructures must have more central relay points due to distance limitations. DSL is limited to only a few thousand feet between the switch and the home; FTTP allows for up to 49.6 miles (80 kilometers) between the home and the central switch. Cable broadband already has a head start, but FTTP offers some advantages, in that cable has a limited upstream bandwidth. FTTP, while still very new, holds great promise. It will enable providers to easily provide customers with a single bundle of services that comprise voice, data, and video. Ultimately, FTTP will deliver higher bandwidth to the home, and a wider range of services at an affordable price. While some FTTP projects focus on replacing existing copper cable, new “greenfield” areas such as new housing developments are likely to see FTTP from the very beginning (WiseGeek, 2007).
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"Image Fibre Bundle Based 3 Component Planar Doppler Velocimetry D S Nobes, R P Tatam." In Optical and Laser Diagnostics, 191–96. CRC Press, 2016. http://dx.doi.org/10.1201/b16835-32.
Full textConference papers on the topic "Optical fiber bundles"
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Sadasivuni, Cherishma, Dan Dye, and Byard Wood. "Ray Trace Analysis for Concentrating Sunlight Onto an Optical Fiber Bundle." In ASME 2006 International Solar Energy Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/isec2006-99077.
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A two-axis concentrating solar collector/receiver is being designed to concentrate visible solar irradiance and distribute it inside a building for daylighting via a bundle of polymer optical fibers. This paper is concerned with the optics that will provide uniform illuminance of the visible spectrum on the entrance of the fiber optic bundle. A fiber optic bundle made of 3mm diameter fibers and a non-imaging device along with the solar collector’s primary and secondary mirrors has been modeled in a ray-tracing software package, TracePro 3.3. Fiber optic bundles of two different geometries were considered, viz. a square bundle with 225 fibers and a round bundle consisting of 126 fibers. The purpose of this research is to determine the optimum length of the non-imaging device that could provide uniform illuminance on the entrance area of the fiber optic bundles. Sensitivity analyses are conducted to see the variations in the output due to different possible off-set conditions, such as distance between the primary and the secondary mirror, the secondary mirror off-set from the primary mirror optical axis, and misalignment due to tracking error. The results of the sensitivity analyses are presented, and recommendations are made for the design of the non-imaging device. It is shown that the square non-imaging device and fiber bundle is superior to the round non-imaging device and fiber bundle.
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Weisser, Michael. "Coherent Fiber Bundles for Biopsy Applications." In Optical Fiber Sensors. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ofs.2006.wa1.
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Groves, Roger M., Stephen W. James, and Ralph P. Tatam. "Multicomponent shearography using optical fiber imaging-bundles." In Optical Metrology, edited by Wolfgang Osten, Malgorzata Kujawinska, and Katherine Creath. SPIE, 2003. http://dx.doi.org/10.1117/12.499784.
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Ares, Jorge. "Surface inspection with optical fiber bundles." In SPIE Proceedings, edited by Aristides Marcano O. and Jose Luis Paz. SPIE, 2004. http://dx.doi.org/10.1117/12.591598.
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Karbasi, Salman, Igor Stamenov, Nojan Motamedi, Ashkan Arianpour, Adam R. Johnson, Ron A. Stack, Chris LaReau, et al. "Curved fiber bundles for monocentric lens imaging." In SPIE Optical Engineering + Applications, edited by G. Groot Gregory, Arthur J. Davis, and Cornelius F. Hahlweg. SPIE, 2015. http://dx.doi.org/10.1117/12.2188901.
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Chiarulli, Donald M., Steven P. Levitan, Paige Derr, Raju Menon, N. Wattanapongsakorn, Bryan Greiner, and Matt Robinson. "Multichannel Optical Interconnections using Imaging Fiber Bundles." In Optics in Computing. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/oc.1999.owb3.
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Juskaitis, Rimas, Tony Wilson, and T. F. Watson. "Confocal microscopy using optical fiber imaging bundles." In Electronic Imaging: Science & Technology, edited by Carol J. Cogswell, Gordon S. Kino, and Tony Wilson. SPIE, 1996. http://dx.doi.org/10.1117/12.237464.
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Kosterin, A., V. Temyanko, M. Fallahi, and M. Mansuripur. "Tapered fiber bundles for high power applications." In 2005 Optical Fiber Communications Conference Technical Digest. IEEE, 2005. http://dx.doi.org/10.1109/ofc.2005.192629.
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Skorobogatiy, M., K. Saitoh, and M. Koshiba. "Directional coupling in hollow Bragg fiber bundles." In 2005 Optical Fiber Communications Conference Technical Digest. IEEE, 2005. http://dx.doi.org/10.1109/ofc.2005.192645.
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Zhang, Hao, Robert Kuschmierz, and Jürgen Czarske. "3D interferometric shape measurement technique using coherent fiber bundles." In SPIE Optical Metrology, edited by Peter Lehmann, Wolfgang Osten, and Armando Albertazzi Gonçalves. SPIE, 2017. http://dx.doi.org/10.1117/12.2269939.
Full textReports on the topic "Optical fiber bundles"
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Kim, S. Y., L. Spanos, and E. A. Irene. Post-Calibration Correction for Rotating-Analyzer Ellipsometer with Optical Fiber Bundle Detection System. Fort Belvoir, VA: Defense Technical Information Center, March 1994. http://dx.doi.org/10.21236/ada277329.
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