Download or read book Digital Heterodyne Holography for Plasmonic Nanostructures written by Sarah Yasmine Suck and published by . This book was released on 2011 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse, nous étudions les caractéristiques de diffusion de nanostructures plasmoniques tout en adaptant et améliorant l'holographie hétérodyne numérique, qui est une technique d'imagerie plein champ pour mesurer en trois dimensions le diagramme de rayonnement. En outre, nous avons effectué de nombreuses mesures spectroscopiques pour enregistrer les spectres de diffusion de nanoobjets uniques. Afin d'obtenir une compréhension plus profonde des caractéristiques du champ diffusé que nous mesurons, nous avons développé un modèle numérique basé sur la méthode des éléments finis. Ce modèle nous a permis de simuler le champ proche et le champ lointain d'une nanostructure avec une onde incidente en réflexion ou en transmission. Nous obtenons un excellent accord entre nos résultats expérimentaux et calculés. Dans cette thèse, nous avons étudié de nombreux nanostructures d'or fabriquées sur du verre par lithographie électronique. Des structures simples nous ont permis de valider la technique. Des objets plus sophistiques nous ont ensuite permis de constater que leur diagramme de diffusion est extrêmement sensible aux facteurs externes et internes, tels que la polarisation et la longueur d'onde de la lumière incidente ou la géométrie de la structure et sa longueur d'onde de résonance. En outre, nous montrons que la technique de l'holographie hétérodyne photothermique mesure directement l'augmentation de la température, et ainsi, se présente comme une nouvelle méthode pour étudier la distribution de la chaleur dans des nanostructures plasmoniques.

Download or read book Digital Holography written by Pascal Picart and published by John Wiley & Sons. This book was released on 2013-01-24 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a substantial description of the principles and applications of digital holography. The first part of the book deals with mathematical basics and the linear filtering theory necessary to approach the topic. The next part describes the fundamentals of diffraction theory and exhaustively details the numerical computation of diffracted fields using FFT algorithms. A thorough presentation of the principles of holography and digital holography, including digital color holography, is proposed in the third part. A special section is devoted to the algorithms and methods for the numerical reconstruction of holograms. There is also a chapter devoted to digital holographic interferometry with applications in holographic microscopy, quantitative phase contrast imaging, multidimensional deformation investigations, surface shape measurements, fluid mechanics, refractive index investigations, synthetic aperture imaging and information encrypting. Keys so as to understand the differences between digital holography and speckle interferometry and examples of software for hologram reconstructions are also treated in brief. Contents 1. Mathematical Prerequisites. 2. The Scalar Theory of Diffraction. 3. Calculating Diffraction by Fast Fourier Transform. 4. Fundamentals of Holography. 5. Digital Off-Axis Fresnel Holography. 6. Reconstructing Wavefronts Propagated through an Optical System. 7. Digital Holographic Interferometry and Its Applications. Appendix. Examples of Digital Hologram Reconstruction Programs

Download or read book Holographie num rique h t rodyne written by Frédérique Kerboull-Le Clerc and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book HOLOGRAPHIE NUMERIQUE HETERODYNE written by FREDERIQUE.. KERBOULL LE CLERC and published by . This book was released on 2001 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACTUELLEMENT, IL PARAIT INTERESSANT DE CARACTERISER UNE ONDE OPTIQUE PAR SON AMPLITUDE ET SA PHASE ET PLUS UNIQUEMENT PAR SON INTENSITE. DANS CE CADRE, UNE TECHNIQUE D'HOLOGRAPHIE NUMERIQUE A ETE REALISEE AU COURS DE CETTE THESE. ELLE EST BASEE SUR LE PRINCIPE DE LA DETECTION HETERODYNE QUI EST GENERALISE A UN CAPTEUR BIDIMENSIONNEL. ELLE PERMET L'ACQUISITION D'UN CHAMP OPTIQUE EN AMPLITUDE ET PHASE A LA SURFACE D'UN CAPTEUR DE TYPE CAMERA CCD. L'APPLICATION DE CETTE TECHNIQUE D'HOLOGRAPHIE HETERODYNE A L'OPTIQUE PHYSIQUE ET A L'ETUDE DE MILIEUX DIFFUSANTS A MIS EN EVIDENCE L'INTERET D'UNE MESURE DU CHAMP COMPLEXE OPTIQUE. EN EFFET, A PARTIR DES CHAMPS MESURES, DES EXPERIENCES OPTIQUES COMPLIQUEES ONT ETE REALISEES GRACE A DES TRAITEMENTS NUMERIQUES. AINSI, DANS LE DOMAINE DE L'IMAGERIE CLASSIQUE, IL A ETE MONTRE QU'IL EST POSSIBLE D'OBTENIR AVEC UN CAPTEUR DE RESOLUTION FINIE, DES IMAGES DE RESOLUTION SUPERIEURE EN EFFECTUANT DES EXPERIENCES D'OUVERTURE SYNTHETIQUE OPTIQUE. CES EXPERIENCES NE SONT REALISABLES QUE SI LA PHASE DU CHAMP MESURE EST CONNUE. DANS LE DOMAINE DE L'IMAGERIE OPTIQUE DE MILIEUX DIFFUSANTS, OU IL EST IMPORTANT DE FILTRER L'INFORMATION DIFFUSEE POUR NE CONSERVER QUE L'INFORMATION UTILE, NOUS AVONS MIS EN PLACE UN FILTRAGE MODAL NUMERIQUE ADAPTE DU CHAMP DIFFUSE MESURE. CE FILTRAGE PAR POST-TRAITEMENT PRESENTE DE BONS RESULTATS QUANT A L'ELIMINATION DU BRUIT DE DIFFUSION ET PERMET UNE CONFIGURATION EXPERIMENTALE SIMPLE ASSURANT SA PORTABILITE.

Download or read book Two wavelength Spatial heterodyne Holography written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Systems and methods are described for obtaining two-wavelength differential-phase holograms. A method includes determining a difference between a filtered analyzed recorded first spatially heterodyne hologram phase and a filtered analyzed recorded second spatially-heterodyned hologram phase.

Download or read book Holography written by and published by . This book was released on 1972 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods of Digital Holography written by Леонид Пинхусович Ярославский and published by Springer. This book was released on 1980-12 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesis of holograms; Wavefront analysis and simulation; Hardware and software.

Download or read book Heterodyne Holography for Vibration Analysis written by B. Ineichen and published by . This book was released on 1983 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Coherence Tomography written by Wolfgang Drexler and published by Springer Science & Business Media. This book was released on 2008-12-10 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical coherence tomography (OCT) is the optical analog of ultrasound imaging and is emerging as a powerful imaging technique that enables non-invasive, in vivo, high resolution, cross-sectional imaging in biological tissue. This book introduces OCT technology and applications not only from an optical and technological viewpoint, but also from biomedical and clinical perspectives. The chapters are written by leading research groups, in a style comprehensible to a broad audience.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fluid Mechanics Measurements written by R. Goldstein and published by Routledge. This book was released on 2017-11-13 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised edition provides updated fluid mechanics measurement techniques as well as a comprehensive review of flow properties required for research, development, and application. Fluid-mechanics measurements in wind tunnel studies, aeroacoustics, and turbulent mixing layers, the theory of fluid mechanics, the application of the laws of fluid mechanics to measurement techniques, techniques of thermal anemometry, laser velocimetry, volume flow measurement techniques, and fluid mechanics measurement in non-Newtonian fluids, and various other techniques are discussed.

Download or read book Laser Spectroscopy 1 written by Wolfgang Demtröder and published by Springer. This book was released on 2014-05-07 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femtosecond lasers) and parametric oscillators, coherent matter waves, Doppler-free Fourier spectroscopy with optical frequency combs, interference spectroscopy, quantum optics, the interferometric detection of gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.

Download or read book Industrial Optoelectronic Measurement Systems Using Coherent Light written by William F. Fagan and published by . This book was released on 1988 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Materials for Wind Musical Instruments written by Voichita Bucur and published by Springer Nature. This book was released on 2019-09-06 with total page 819 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses key questions about the materials used for the wind instruments of classical symphony orchestra such as flutes, clarinets, saxophones, oboes, bassoons and pipe organs. The content of this book is structured into four parts. Part 1- Description of materials for wind instruments deals with wood species and materials for reeds used for making clarinet, oboe and bassoon- and, with metallic materials and alloys for - horn, trumpet, trombone, etc. Auxiliary materials associated with the manufacturing of wind instruments are felt, cork, leather and parchment. Part 2- Basic acoustics of wind instruments, in which are presented succinctly, some pertinent aspects related to the physics of the resonant air column. An important aspect discussed is related to the effect of wall material on the vibration modes of the walls of wind instruments. The methods for measuring the acoustical properties of wind instruments are presented. Part 3- Manufacturing of wind instruments, describes the technology used in manufacturing metallic tubes and pipes made of wood. Part 4 - The durability and degradation of materials addresses data about methods for cleaning wind instruments, studies factors producing degradation of organ pipes, describes methods of conservation and restoration of brass instruments and of historical pipe organs. Finally, the properties of marble are described, being the only one nondegradable and sustainable material used for pipes for organs.

Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1971 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Materials for String Musical Instruments written by Voichita Bucur and published by Springer. This book was released on 2016-08-29 with total page 977 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses core questions about the role of materials in general and of wood in particular in the construction of string instruments used in the modern symphony orchestra – violins, violas, cellos and basses. Further attention is given to materials for classical guitars, harps, harpsichords and pianos. While some of the approaches discussed are traditional, most of them depend upon new scientific approaches to the study of the structure of materials, such as for example wood cell structure, which is visible only using modern high resolution microscopic techniques. Many examples of modern and classical instruments are examined, together with the relevance of classical techniques for the treatment of wood. Composite materials, especially designed for soundboards could be a good substitute for some traditional wood species. The body and soundboard of the instrument are of major importance for their acoustical properties, but the study also examines traditional and new wood species used for items such as bows, the instrument neck, string pegs, etc. Wood species’ properties for musical instruments and growth origins of woods used by great makers such as Antonio Stradivari are examined and compared with more recently grown woods available to current makers. The role of varnish in the appearance and acoustics of the final instrument is also discussed, since it has often been proposed as a ‘secret ingredient’ used by great makers. Aspects related to strings are commented.As well as discussing these subjects, with many illustrations from classical and contemporary instruments, the book gives attention to conservation and restoration of old instruments and the physical results of these techniques. There is also discussion of the current value of old instruments both for modern performances and as works of art having great monetary value.The book will be of interest and value to researchers, advanced students, music historians, and contemporary string instrument makers. Musicians in general, particularly those playing string instruments, will also find its revelations fascinating. It will also attract the attention of those using wood for a variety of other purposes, for its use in musical instruments uncovers many of its fundamental features. Professor Neville H. FletcherAustralian National University, Canberra