Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"light guide"”.
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Development of a reinforcing fibre light-guide for use as a damage sensor within composite structures
… by using glass reinforcing fibres to produce a light-guide, which was embedded within a composite laminate. The laminate was then subjected to impact events or bending stresses of sufficient magnitude to cause damage. The impact energies used in this study varied between 2 and 10 Joules, and the …
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White Light Endoscopy for Minimal Invasive Surgery
… a solid-state LED or laser pumped phosphor white light system. The overall aim was to replace current xenon lamps, which have many unwanted characteristics with lower cost, higher efficiency and more environmentally friendly solid state devices to improve the benefits of endoscopic minimal …
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Diffusion in rare-gas liquids : an experimental study
… consisting of a cesium iodide crystal, a lucite light guide and a photomultiplier tube is used for this purpose. A temperature control method is incorporated which is capable of maintaining a set temperature to within ± 0.03 K in space and time. Modified equations for the diaphragm cell are …
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Diffusion in rare-gas liquids : an experimental study
… consisting of a cesium iodide crystal, a lucite light guide and a photomultiplier tube is used for this purpose. A temperature control method is incorporated which is capable of maintaining a set temperature to within ± 0.03 K in space and time. Modified equations for the diaphragm cell are …
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Sterile neutrino searches in MiniBooNE and MicroBooNE
… focusing on the MicroBooNE experiment and light collection studies. In particular, understanding the degradation source of TPB, designing the TPB-coated plates for MicroBooNE and developing light guide collection systems will be discussed. We find an excess of events in the …
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Behavior of Light in a Photobioreactor and Design of Light Guides
… in a photobioreactor system; demonstrate the light activity in a flat-plate photobioreactor; and design the light channeling system. Generally, microalgae are cultivated in open ponds and in closed photobioreactor systems. In open ponds, the productivity of microalgal biomass is very low, due …
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Design study of an organ-dedicated positron emission tomography system
… (SiPM), and the SiPM channel size is 3×3 mm2. A light guide is inserted between the LYSO and the SiPM for crystal identification, and the optimal light guide thickness is evaluated as 1.2 mm. The detector is cooled by a Peltier element, and the detector performance is characterized at 10 depths. …
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The micro-optical ring electrode: Development of a novel thin ring based device for spectrophotoelectrochemistry and its application to the study of rose bengal
… design and using the electrode shank as a light guide, the Micro- Optical Ring Electrode (MORE) is a novel device that has been designed and constructed to permit electrochemical investigation of photochemically generated solution species. Thin rings exhibit high rates of material flux to …
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Polymer based microscale and nanoscale technologies for optical and biomedical application
… of insects. I integrated lens, conic spacer and light guide to concentrate and redirect sunlight into small area where PV cell can be installed. My design can have total concentration up to ~40 for acceptance angle of 15à °.</p> <p>Second, I designed and fabricated automated light control switch …
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The micro-optical ring electrode: a new and novel electrode system for photoeletrochemistry
… microelectrode and using at fibre-optic light guide as the insulating material interior of the ring, the MORE has been deisigned, constructed and developed to permit electrochemical investigation of photochemically generated solution species. Initial characterisation of the electrode …
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Efficient Use of Photons in a Photobioreactor
… be developed, three main elements of the system (light, photosynthetic microorganism and nutrients) need to be optimized incorporating concepts from multiple disciplines. This dissertation deals only with one main element, light optimization. To understand light optimization, an understanding of …
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Analysis of the optical coupling of wavelength-shifting fibers to organic liquid scintillator filled fluoropolymer tubes for industrial and nuclear security applications
… The 1:400 ratio of diameter to length makes light collection from the organic scintillator very challenging. Over ten configurations of OLS, fluoropolymer tubes, and WLS fibers were tested. The final configuration consisted of two 2mm BCF-91A WLS fibers optically coupled to the outside of an …
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Lighting a building with a single bulb : toward a system for illumination in the 21st c.; or, A centralized illumination system for the efficient decoupling and recovery of lighting related heat
Piping light represents the first tenable method for recovery and reutilization of lighting related heat. It can do this by preserving the energy generated at the lamp as radiative, departing from precedent and avoiding absorption of and re-emission of radiant heat as convection and conduction. …
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Design and development of thin optical components for nonimaging applications = Diseño y desarrollo de componentes ópticos delgados para aplicaciones anidólicas
… classical optics solutions to the problems of light energy transfer are only appropriate when the light rays are paraxial. The paraxial condition is not met in most applications for the concentration and illumination. Nonimaging optics eliminates the constraints of image formation and solves …