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Tesis sobre el tema "Laser illumination"

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Publicado: 4 de junio de 2021
Última modificación: 5 de febrero de 2022

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1

Jiang, Shihong. "Non-scanning fluorescence confocal microscopy using laser speckle illumination." Thesis, University of Nottingham, 2005. http://eprints.nottingham.ac.uk/10139/.

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Confocal scanning microscopy (CSM) is a much used and advantageous form of microscopy. Although CSM is superior to conventional microscopy in many respects, a major disadvantage is the complexity of the scanning process and the sometimes long time to perform the scan. In this thesis a novel non-scanning fluorescence confocal microscopy is investigated. The method uses a random time-varying speckle pattern to illuminate the specimen, recording a large number of independent full-field frames without the need for a scanning system. The recorded frames are then processed in a suitable way to give
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2

Liu, Xiao-Long, Weibo Cheng, Massimo Petrarca, and Pavel Polynkin. "Universal threshold for femtosecond laser ablation with oblique illumination." AMER INST PHYSICS, 2016. http://hdl.handle.net/10150/622151.

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We quantify the dependence of the single-shot ablation threshold on the angle of incidence and polarization of a femtosecond laser beam, for three dissimilar solid-state materials: a metal, a dielectric, and a semiconductor. Using the constant, linear value of the index of refraction, we calculate the laser fluence transmitted through the air-material interface at the point of ablation threshold. We show that, in spite of the highly nonlinear ionization dynamics involved in the ablation process, the so defined transmitted threshold fluence is universally independent of the angle of incidence a
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3

Hardy, Nicholas D. (Nicholas David). "Optimal standoff imaging using structured laser illumination and graphical models." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92965.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 241-246).<br>Structured illumination can be used to form images without using a lens or a detector array. A series of spatially-structured laser pulses is cast on the scene of interest, and a single-detector power measurement
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4

DILLEMANN, BENOIT. "Comportement dynamique du dioxyde de vanadium sous illumination laser impulsionnelle." Paris 7, 1995. http://www.theses.fr/1995PA077271.

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Transparent a temperature ambiante dans une large bande infra-rouge, le dioxyde de vanadium subit a 60c une transition de phase solide-solide le rendant totalement opaque a toute emission lumineuse. Le travail de recherche mene ici s'articule autour de trois axes complementaires de developpement, caracterisation et modelisation de ce compose. Afin d'obtenir des couches optiquement performantes, une partie du travail de these consiste a participer a l'elaboration de films de dioxyde de vanadium suivant deux procedes de fabrication originaux : une technique de pulverisation cathodique assistee s
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5

Kramer, Richard Dillon. "Annealing of radiation damaged gallium arsenide solar cells by laser illumination." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA289683.

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6

Nellas, Ioannis. "Terahertz imaging via a microbolometer camera under illumination of a quantum cascade laser." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5094.

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Approved for public release; distribution is unlimited<br>The terahertz (THz) region of the electromagnetic spectrum has not been fully utilized due to the lack of compact and efficient sources as well as detectors. This thesis aimed on characterizing a quantum cascade laser (QCL) beam and achieving high quality real-time THz imaging using a 160x120 pixel FLIR A20M microbolometer camera designed to operate in long wave infrared range. The FTIR spectroscopy of the QCL beam revealed that lasing could be achieved at 2.85 and 2.91 THz frequencies depending on the bias current. This behavior wa
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7

Radenbach, Hannes N. "Radiative Behaviour of Gd2O3:Er/Yb nanoparticles under near infrared illumination." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/16116.

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Mestrado em Ciência e Engenharia de Materiais<br>Upconverting nanoparticles have attracted much attention in science recently, specifically in view of medical and biological applications such as live imaging of cell temperatures or cancer treatment. The previously studied system of gadolinium oxide nanorods co-doped with erbium and ytterbium and decorated with different number densities of gold nanoparticles has been studied. So far, these particles have been proven as efficient nanothermometers in a temperature range from 300 up to 2000 K. In this work, a more detailed study on the morphological
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8

Magalhães, Ana Carolina de. "Investigation of the influence of red and infrared illumination on mechanical properties of cells: Photobiomodulation." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-05012017-145626/.

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The photobiomodulation therapy (PBMT) has many demonstrated applications in the health area including anti-inflammatory and wound healing effects. The main objective of this work is to verify if the PBMT causes measurable changes in the mechanical properties of cells, specifically in red blood cells, epithelial cells and fibroblasts. In addition, to contribute to the knowledge of the action mechanisms of the PBMT, this study intends to support applications of the PBMT during invasive procedures, such as the direct photo-treatment of the blood in surgical procedures with cardiopulmonary bypass,
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9

Chase, Charles T. "Annealing of defect sites in radiation damaged indium phosphide solar cells through laser illumination." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA306566.

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10

Graf, Alexander [Verfasser]. "Simultaneous Bulk Degradation and Regeneration of BO-LID and LeTID via Laser Illumination / Alexander Graf." Konstanz : KOPS Universität Konstanz, 2021. http://d-nb.info/1228271879/34.

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11

Luo, Ming. "Optical Analysis and Opto-Mechanical Design for Miniaturized Laser Illumination Module in 3D Areal Mapper." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33169.

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A miniaturized spatial light modulator (SLM)-based structured-light illumination module with optical fiber input is designed to generate a coded 256 x 256 spots pattern for 3-D areal mapping applications. The projector uses the light from a He-Ne laser coupled to a polarization-maintaining (PM) fiber to illuminate a specially made hologram so that four virtual point sources are regenerated. The interference pattern of the four sources are filtered and modulated by an SLM. The output intensity can thus be encoded to form any arbitrary pattern through the electronic input applied to the SLM with
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12

Revi, Frank. "Measurement of two-dimensional concentration fields of a glycol-based tracer aerosol using laser light sheet illumination and microcomputer video image acquisition and processing." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/69291.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1992.<br>Includes bibliographical references (leaves 48-49).<br>The use of a tracer aerosol with a bulk density close to that of air is a convenient way to study the dispersal of pollutants in ambient room air flow. Conventional point measurement techniques do not permit the rapid and accurate determination of the concentration fields produced by the injection of such a tracer into a volume of air. An instantaneous two dimensional distribution would aid in the characterization of flow and diffusion processes in the vo
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13

Gläser, Philipp [Verfasser], Jürgen [Akademischer Betreuer] Oberst, Gregory [Akademischer Betreuer] Neumann, and Harald [Akademischer Betreuer] Hiesinger. "Evaluation of topography, slopes, illumination and surface roughness of landing sites near the lunar south pole using laser altimetry from the lunar reconnaissance orbiter / Philipp Gläser. Gutachter: Jürgen Oberst ; Gregory Neumann ; Harald Hiesinger. Betreuer: Jürgen Oberst." Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1067388044/34.

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14

Gläser, Philipp Andreas [Verfasser], Jürgen [Akademischer Betreuer] Oberst, Gregory [Akademischer Betreuer] Neumann, and Harald [Akademischer Betreuer] Hiesinger. "Evaluation of topography, slopes, illumination and surface roughness of landing sites near the lunar south pole using laser altimetry from the lunar reconnaissance orbiter / Philipp Gläser. Gutachter: Jürgen Oberst ; Gregory Neumann ; Harald Hiesinger. Betreuer: Jürgen Oberst." Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1067388044/34.

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15

Jobe, Oli. "Hyperbolic-umbilic diffraction catastrophe from oblate water drops with tilted illumination." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/O_JOBE_073008.pdf.

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16

Rowan, Sheila. "Aspects of lasers for the illumination of interferometric gravitational wave detectors." Thesis, University of Glasgow, 1995. http://theses.gla.ac.uk/3422/.

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Chapter 1 of this thesis contains an introduction to the nature, sources and methods proposed for the detection of gravitational waves. Emphasis is placed on the techniques and noise sources associated with laser interferometric gravitational wave detectors and the resulting implications for the choice of a laser source for this type of detector. This information is mainly derived from the literature. Chapter 2 contains details of experiments to construct an electronic feedback system to stabilise the intensity at both low and high frequencies of a miniature diode-pumped monolithic Nd:YAG ring
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17

Shangguan, Hanqun. "Novel Cylindrical Illuminator Tip for Ultraviolet Light Delivery." PDXScholar, 1993. https://pdxscholar.library.pdx.edu/open_access_etds/4647.

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The design, processing, and sequential testing of a novel cylindrical diffusing optical fiber tip for ultraviolet light delivery is described. This device has been shown to uniformly(+/- 15%) illuminate angioplasty balloons, 20 mm in length, that are used in an experimental photochemotherapeutic treatment of swine intimal hyperplasia. Our experiments show that uniform diffusing tips of < 400 micron diameter can be reliably constructed for this and other interstitial applications. Modeling results indicate that this design is scalable to smaller diameters. The diffusing tips are made by strippi
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18

Ait, Fqir Ali Fatima Zahra. "Développement et caractérisation de nouveaux procédés de passivation pour les capteurs d'images CMOS." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10186.

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La conception des futures générations de capteurs d'images CMOS, nécessite l'intégration de structures 3D telles que les tranchées profondes d'isolation, ou encore l'adoption de nouvelles architectures telles que les capteurs d'images à illumination face arrière. Cependant, l'intégration de telles architectures engendre l'apparition de nouvelles interfaces Si/SiO2, pouvant être la source d'un fort courant d'obscurité Idark, dégradant considérablement les performances électro-optiques du capteur. Ainsi, dans le but d'éliminer le Idark et d'augmenter l'efficacité de collecte et de confinement de
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19

Frugier, Pierre Antoine. "Quantification 3D d’une surface dynamique par lumière structurée en impulsion nanoseconde. Application à la physique des chocs, du millimètre au décimètre." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112129.

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La technique de reconstruction de forme par lumière structurée (ou projection de motifs) permet d’acquérir la topographie d’une surface objet avec une précision et un échantillonnage de points dense, de manière strictement non invasive. Pour ces raisons, elle fait depuis plusieurs années l’objet d’un fort intérêt. Les travaux présentés ici ont pour objectif d’adapter cette technique aux conditions sévères des expériences de physique des chocs : aspect monocoup, grande brièveté des phénomènes, diversité des échelles d’observation (de quelques millimètres au décimètre). Pour répondre à ces exige
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20

Mau, Adrien. "Développements pour l'imagerie quantitative et à haut contenu en microscopie de fluorescence classique et super-résolue." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASP016.

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La microscopie de fluorescence et la microscopie de localisation de molécules uniques (SMLM) permettent d’imager spécifiquement les entités subcellulaires et sont donc des outils indispensables en Biologie. Cependant ces techniques d’imagerie sont intimement liées aux propriétés de l’illumination, qui possède des limites en termes d’uniformité et de contrôle de l’éclairement.Nous proposons une nouvelle méthode d’illumination nommée ASTER (Adaptable Scanning for Tunable Excitation Regions), capable de délivrer une illumination modulable et uniforme, et compatible avec les méthodes de sectionnem
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21

Chang-Chien, Ching-Ho, and 張簡靖禾. "RGB Laser for Special Illumination Applications." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/4axeum.

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碩士<br>國立高雄應用科技大學<br>光電與通訊工程研究所<br>101<br>Common light sources available in the market include incandescent bulbs, fluorescent lamps, mercury lamps, halogen lamps, LED lamps. Recently LED light sources and related applications are especially developed rapidly. For short-range illumination, LEDs incorporated with specially designed lampshades are required. For medical applications, a short range illuminator is required to light a small area. In such cases, LEDs connected to optical fibers seems to be the promising candidate. However during the lightwave propagating in the system, poor performa
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22

Shu, Chun-Wei, and 蘇峻緯. "Influence of Excimer laser illumination on micromachining." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/99081037468089230066.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>92<br>Abstract 　　The purpose of this research is to examine the influence of excimer laser illumination on micromachining. Here are three different kinds of condition that influence light distribution. First, the incline of work piece and the laser beam indicates that the ablation rate decreases with the increase of incident angle for various influences. Beside, the depth of a hole in the samples oblique to the laser beam at a distance from the focal plane decreases with the increase of the distance from the focal plane. Second, to increase the lens on the pat
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23

Liu, Yu-Hsuan, and 劉宇軒. "Quantization of Laser Speckle's Impact on Image Resolution of Direct Laser Illumination Systems and Laser Scanning Illumination System's Exceptional Performance on This Topic." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/j47y78.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>106<br>The high coherence characteristics of the laser light itself cause a laser speckle phenomenon in the image received by the laser range-gated system. This phenomenon undoubtedly reduces the image quality and affects the sharpness and naturalness when the observer viewing things. Therefore, this dissertation proposes a mathematical quantitative model between laser speckle size and image resolution. This mathematical model is capable of quantifying the size of the laser speckle formed by a laser range-gated system using different methods of suppressing laser spec
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24

Chen, Kuan-Ting, and 陳冠廷. "Calculation of Speckle Contrast of Direct Laser Illumination Systems and the Laser Scanning Illumination System's Exceptional Performance on This Issue." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/py2rr7.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>106<br>Laser light has the following characteristics compared to other light sources：（1）Directionality（2）Monochromaticity（3）Coherence. Because of these characteristics, laser light plays an important role in many fields. For some specific illumination applications, it is more suitable to use laser light as the illumination source. However, the high coherence characteristic will cause laser speckle phenomenon when using a laser light as an illumination source. This phenomenon undoubtedly reduces the image quality and affects the sharpness and naturalness when the obse
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25

Chen, Kuan-Yu, and 陳冠宇. "Fabrication of Blue-Laser Benzocyclobutene Optical Waveguide by UV Illumination." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/88066761879793360293.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>94<br>In this work, buried-type single-mode benzocyclobutene (BCB) channel waveguides fabricated by 248nm krypton fluorine (KrF) excimer laser for a blue laser of wavelength 473nm are first demonstrated. The ultraviolet-induced refractive index changes, measured by prism coupler and spectroscopic ellipsometer, are dependent on the number of laser shots and the pulse repetition rate. By arranging the number of laser shots and the mask width, mode sizes with different aspect ratios can be obtained. Moreover, the proposed UV illumination method is much simpler and more
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26

Chang, Yu-Shuan, and 張宇萱. "Fabrication of Benzocyclobutene Multimode Interference Devices by Ultraviolet Laser Illumination." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/46453448588527043607.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>96<br>Buried-type benzocyclobutene (BCB) multimode interference (MMI) optical power splitters fabricated by the ultraviolet laser illumination are presented. The devices of interest are 1 4, 2 2, and 4 4 MMI devices. The BCB polymer is illuminated by 248nm krypton fluorine excimer pulse laser through a quartz mask. The single mode waveguide has width of 7μm and refractive index of 0.0027 to 0.003. The best 1 4 MMI device exhibits a transmission of 95.52% and an imbalance of 0.41dB with interaction length of 1520μm. The best 2 2 MMI device exhibits a transmission of
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27

Yi-ChengWang and 王以誠. "Darkfield illumination with laser beam shaping for Raman detection of particles." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/t6nctq.

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碩士<br>國立成功大學<br>光電科學與工程學系<br>105<br>We attempt to measure the Raman signals of a single particle through the setup of darkfield microscopy. The darkfield microscopy setup has an annular aperture, which can block central region of the incident light and create an annular beam. In this setup, the annular beam can illuminate the specimen obliquely. At an oblique angle illuminating specimen can reduce the scattering signals of the substrate collected by the objective, but the scattering signals of the specimen are still captured by the objective. In the darkfield setup, the scattering signal inten
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28

Li, Chien-Te, and 李建德. "Reflector Design and its application to IR illumination and Laser Speckle Reduction." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/46440661058693232675.

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碩士<br>國立交通大學<br>光電工程系所<br>95<br>In this thesis, we consider the optical designs of reflector in a variety of illumination application, namely, infrared illumination and laser speckle reduction. In the application of IR illumination, Nucleic-acid analysis using PCR is one of the indispensable and powerful methods used in the areas of molecular and clinical diagnostics and forensic applications. Due to a great demand for miniaturized portable real-time PCR based point-of-care devices, a non-contact thermo-cycling approach using IR system is popularly employed. We explored such an IR illumination
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29

Lu, Eugene Youjhen, and 盧宥蓁. "The ROS induced by laser illumination and its effect on cell migration." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/66548515169039697065.

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碩士<br>國立陽明大學<br>生醫光電研究所<br>102<br>We project a 473 nm and a 660 nm laser light pattern onto the cell adhesion surface to modulate cell migration. And we investigate the role of reactive oxygen species (ROS) in the mechanism of how blue light induces cell migration behavior. A spatial light modulator(SLM) is used to generate 473 nm and 660 nm laser pattern imaged onto the stage of a microscope. This system was created by Dr. Jian-Long, Xiao. Through this system, our group have demonstrated that 473 nm laser light pattern can be used to culture cell into arbitrary shapes of cell sheets, or push
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30

Kuo, Chen Nan, and 郭陳年. "Imaging photofragments in velocity space by laser sheet illumination techniques: Photodissociation of ICN." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/45403959696989687224.

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博士<br>國立中山大學<br>化學學系<br>82<br>Combining laser sheet illumination and two-dimensional image techniques, photofragmentation of ICN at 248 nm was studied in great details. The three-dimensional distribution of number density, angle and velocity of state-selected CN photofragments was successfully determined by slicing an expanding, spherical shell from the photodissociation center sequentially. A physical model was developed to correlate the photodissociation dynamics and image patterns from
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31

Yi, Po-Wei, and 易柏維. "Using varying length of fiber bundle to reduce the laser speckle of endoscope illumination source." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/s9u85x.

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碩士<br>國立陽明大學<br>生醫光電研究所<br>107<br>In order to not only reduce the section of endoscope but also maintain sufficient brightness. We utilize a high coherent semiconductor laser as the light source. But it also accompanies speckle generation. When the high coherent light source transmitts to the screen or the object, the surface of the object is not smooth, resulting in the scattered light to interfere, which affects the image quality. Therefore, reducing the speckle to enhance image clarity is the goal of the experiment. We use customized fiber, buzzer, and laser speckle reducer to lower speckle
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32

Chao, Weng Sun, and 趙文山. "Laser Illumination effects on the Surface Morphology and Surface -Enhanced Raman Scattering of Water Molecules on Ag Electrodes." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/14904513646183797294.

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33

Ho, Ching-Ju, and 何靜茹. "Development of a new type optical CT scanner by using a collimated single laser line with uniform flat-top illumination." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33270657835254850957.

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碩士<br>國立臺北教育大學<br>自然科學教育學系碩士班<br>98<br>ABSTRACT As radiation therapy technology advances, measurements of 1-D and 2-D dose distributions are insufficient to meet the clinical requirements. 3-D dose distributions of gel dosimeter has been widely developed and emphasized to replace traditional technique. The purpose of this study is to establish an optical scanner via parallel laser source system to read 3-D dose distributions. This work exploited a solid-state laser line projector with uniform flat-top illumination from Stocker Yale, coupled with two spherical lens to redistribute the 90 de
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34

Chou, Yao-Chun, and 周曜群. "The Effects of High-Temperature Treatment and Persisted Laser Illumination on the Surface Enhanced Raman Scattering of Benzoic Acid by Silver-Doped Sol-Gels." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/70536724250581209937.

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碩士<br>逢甲大學<br>光電研究所<br>96<br>This thesis deals with the surface enhanced Raman scattering (SERS) of benzoic acid’s ring breathing mode (1003cm-1) and carboxyl C=O vibrational mode (1600cm-1) by the silver particles doped sol-gels with various high-temperature treatments and persisted laser illuminations. The sol-gels are made out of tetramethyl orthosilicate (TMOS), water, methanol, and formamide with the molar ratio of 1:4:4:2. Methanol is chosen as the solvent of the benzoic acid (BA) solutions for its immunity to the SERS effect. Consequently, methanol’s 1033cm-1-peak can serve as a good in
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35

Li, Meng-Che, and 李孟哲. "Micro DLP Projector with Laser Illuminator." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/90796414238543037474.

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碩士<br>國立清華大學<br>動力機械工程學系<br>97<br>Abstract The rapid evolution of digital projector technology in the recent years, one of the major trends is light, thin, and small portable projector. The research is an extended work based on Texas Instruments Inc. DLP (Digital Light Processing) projection technology which discusses the feasibility on how to shrink optical system in non-imaging and imaging optical designs. Another key feature is exploiting laser instead of conventional UHP lamp as the illuminator. During the experiment, the prototype is modified from an existing commercial DLP projector bo
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36

Ho, Ya-chieh, and 何雅潔. "High-Efficiency Two-Layer Coupler Design for Natural Light Illumination System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/64247980869431065455.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>102<br>Nowadays, global warming has become a major issue. Reducing the consumption of fossil fuel and saving energy were the top priorities. In response to the energy crisis, renewable energy has been widely taken as other energy options. Solar energy is one of the most essential and abundant energy. If we can collect and transmit natural light into buildings without opto-electronic conversion, that will save energy and provide healthier light into our daily life. Therefore, our team designed a series of products known as Natural Light Illumination System (NLIS). In
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37

Lugongolo, Masixole Yvonne. "Optical micro-manipulation in HIV-1 infected cells for improved HIV-1 treatment and diagnosis." Thesis, 2020. http://hdl.handle.net/10500/26551.

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Laser application in the field of biological and medical sciences has significantly grown, thereby strengthening the field of Biophotonics. Research conducted in Biophotonics focuses on the concept of using light especially in the visible and near infrared regions of the electromagnetic radiation for the evaluation of living systems. In this thesis new discoveries are presented about low level laser therapy, optical trapping, transmission spectroscopy, luminescence spectroscopy and structured illumination microscopy (SIM), displaying the impact each technique has on HIV infected cells. Th
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Wang, Yu-sheng, and 王昱升. "Optoelectronic behaviors of n-ZnO/i-Al2O3/p-Si diodes under high-power-laser illuminations." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/jp83re.

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碩士<br>國立中山大學<br>物理學系研究所<br>103<br>In this thesis work, pin-diodes made of p-Si/AlOx/c-ZnO were investigated in regards to their photo-responses to high-power Nd:YAG laser of wavelength = 1064nm and that at 532nm via second-harmonic generation, both operated at various optical power levels. The diodes exhibit large leakage current as they were made, suspected to be a combined result of domain-boundary conduction paths within ZnO, as they are a layer of thin films textured along the c-axis in general, followed by tunneling of carriers across the insulating AlOx layer. Such as-fabricated diodes
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39

Tsai, Min-Yen, and 蔡旻諺. "Applications of UV shield layer for negative-bias-illumination-stress instability in a-InGaZnO TFTs." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/34320712582064361713.

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碩士<br>國立交通大學<br>顯示科技研究所<br>102<br>The electrical characteristics of a-IGZO TFTs affected by ambient environment, including oxygen, moisture, and light illumination, are still among the issues for a-IGZO TFTs to be the commercialization of for flat panels. Passivation layers, e.g. SiO2 or SiNX, on an active layer are an effective method to improve the oxygen or moisture effects. However, the photosensitivity issue still occurs in a-IGZO TFTs by introducing above mentioned passivation layers. A transparent metal oxide semiconductor: Mo-doped ZnO (MZO) with UV shielding ability as the passivation
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40

Ma, Chi-tang, and 馬啟唐. "Design of Static Solar Concentrator with Interlaced Double-Layer Lens Arrays for Natural Light Illumination System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/2a9rq4.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>99<br>In recent years, due to the awareness of environmental protection, the use of green energy gets more and more attention around the world. Industry and academia focus on the use of sunlight to provide indoor lighting and save energy. One of the structures of solar concentrator is using lens to collect light, which features a high concentration ratio. But the acceptance of incident light angle of lens-type concentrator is quite small. If there is a tilted angle θ between parallel light and optical axis of lens, the focal point shifts from the original position an
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41

Hsieh, Chih-Hao, and 謝志豪. "Nearly White Light Illumination from a GaN-Based Light Emitting Diode Integrated with a Porous SiO2 Layer." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/35634460086978286387.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>94<br>In this research, we develop a nearly white light emitting device by integrating blue/green emission from a GaN based light emitting diode (LED) with red emission from a porous SiO2 layer. The porous SiO2 layer was fabricated by a novel process procedure to create Si nanocrystals on top of the n-type GaN layer. Red light is generated from the metal-oxide-semiconductor (Ni/Au–SiO2 oxide-n-type GaN) structure due to the electron-hole recombination in the Si nanocrystals. The device shows a blue light emission at a low biased voltage and nearly white light emi
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Mason, Ashley D. "Effects of ultraviolet illumination and a parylene-A activation layer on the gas phase sensing characteristics of ZnO nanobridges." Thesis, 2011. http://hdl.handle.net/1957/21925.

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ZnO nanowires (NWs) are good candidates for chemical sensing because of their high surface-to-volume ratio. In this work, ZnO nanobridge sensors were fabricated utilizing a novel method which uses carbonized photoresist (C-PR) as a nucleation layer. The use of C-PR allows simultaneous growth and integration of NWs to lithographically-defined features. The nanobridge sensors are shown to be sensitive to the presence of O₂, H₂O, CO, and H₂/N₂ gas. However, since ZnO dissolves in water, a protective layer is necessary for these sensors to be used in the liquid or vapor phase. A chemical vapor dep
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Yu-RuLin and 林育如. "Improvement of Light Illumination Efficiency of GaN-based LED by Co-Sputtering Multi-layer Graded-index ZnxSiyO3 Thin Film." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/83004557759894234853.

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碩士<br>國立成功大學<br>光電科學與工程研究所<br>98<br>In this study, we prepared the different refractive index of ZnO-SiO2 compound thin films by changing the contents of ZnO and SiO?2. First, we used ray-tracing simulation to study the light extraction efficiency of graded-index films stacked on GaN-based LEDs. And then, we implemented the similar structures on GaN-based LEDs to improve the light output power efficiency. In this experiment, ZnO-SiO2 compound thin films were prepared by co-sputtering, and these kind of compound thin films are defined as ZnxSiyO3. The co-sputtering ZnxSiyO3 thin films in
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Chen, Yen-Chiao, and 陳彥橋. "Utilizing the Nb2O5 blocking layer to improve the power conversion efficiency of dye-sensitized solar cell under indoor light illumination." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/58665991686015563282.

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碩士<br>國立中興大學<br>化學工程學系所<br>105<br>In 1991, Michael Grätzel has invented the dye-sensitized solar cells (DSSCs) which the efficiency of the solar cells reaches 7 % under 1 sun condition. The DSSCs have many advantages of low cost, environment protection and easy fabrication. DSSCs are limited by the recombination reaction of the electrons from the fluorine-doped tin oxide (FTO) substrate back into the electrolyte and from the TiO2 to electrolyte. In order to suppress the electron recombination at the FTO/electrolyte interface, the Nb2O5 blocking layer which can prevent the electrolyte from dire
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Kemp, Jamie. "The Mind's Eye: Visualizing Encyclopedic Knowledge in the Later Middle Ages." Thesis, 2014. http://hdl.handle.net/1828/5773.

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This dissertation critiques and updates the theoretical frameworks for understanding encyclopedic and diagrammatic images as presented in the scholarship of Lucy Freeman Sandler, Barbara Maria Stafford, John Bender, and Michael Marrinan. It offers a new model for examining the cognitive role of images by studying an important medieval encyclopedia, On the Properties of Things, originally written in Latin by Bartholomaeus Anglicus in the thirteenth century. Bartholomaeus’ text was the most popular encyclopedia of the later middle ages and four vernacular translations were produced and circul
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"A Study of Heating and Degradation of Acrylonitrile-Butadiene-Styrene/Polycarbonate Polymer Due to Ultraviolet Lasers Illumination during Localized Pre-Deposition Heating for Fused Filament Fabrication 3D Printing." Master's thesis, 2017. http://hdl.handle.net/2286/R.I.44212.

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abstract: With the growing popularity of 3d printing in recreational, research, and commercial enterprises new techniques and processes are being developed to improve the quality of parts created. Even so, the anisotropic properties is still a major hindrance of parts manufactured in this method. The goal is to produce parts that mimic the strength characteristics of a comparable part of the same design and materials created using injection molding. In achieving this goal the production cost can be reduced by eliminating the initial investment needed for the creation of expensive tooling. This
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