Relevant bibliographies by topics / White Light Interferometry (WLI)

Academic literature on the topic 'White Light Interferometry (WLI)'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "White Light Interferometry (WLI)"

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Deng, Lin Juan, Yu Xia Fu, Xiao Yu Cai, Yuan Li, Li Hua Lei, and Dong Zhao. "Study on Phase Shifting Algorithm and System of White Light Interference." Advanced Materials Research 889-890 (February 2014): 749–54. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.749.

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The white-light interferometry (WLI) has been widely used in 3D topography measurement. This paper introduces a white light phase shifting method for interferometry with the combination of Hariharan phase shifting and WLI. A micro/nanolevel mechanic system was designed and built for the experiments. To verify system accuracy and feasibility, a 100nm step height standard was measured by the designed system and the metrological nanomeasurement machine (NMM). Results of 102.7nm and 102.5nm are obtained respectively. En value of 0.14 is calculated, demonstrating the reliability of result measured by the system. Based on classic nanoquantity traceability system, the measurement results can effectively traced back to the definition of nanometer magnitude, which can improve the accuracy of measurement.
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Li, Shengyuan, Haifeng Lv, Yachuan Kuang, Nianchun Deng, Changsen Sun, and Xuefeng Zhao. "Force-monitoring ring based on white-light interferometry for bridge cable force monitoring and its temperature compensation." Advances in Structural Engineering 22, no. 6 (December 4, 2018): 1444–52. http://dx.doi.org/10.1177/1369433218815620.

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This article proposes a novel white-light interference (WLI) force-monitoring ring for bridge cable force monitoring and temperature compensation. The WLI force-monitoring ring employs a sensing optical fiber wrapped around the outer surface of an elastomer to measure the expansion caused by applied load and temperature. By installing WLI force-monitoring ring between the anchor plate and the spherical plate of the cable, cable force can be captured by the sensing optical fiber and thus measured after temperature compensation. Based on white-light interferometry, two force-monitoring rings with resolution of 0.25 µ are designed. To find a route to temperature compensation, laboratory experiments are carried to study the effects of temperature on WLI force-monitoring ring both in free and forced states. Theoretical analysis and calibration experiments are implemented to verify the effectiveness of the proposed WLI force-testing ring, and the experiment results expose that the temperature-induced strain can be compensated using a WLI force-monitoring ring in free state. As a comparison, similar work is made for four fiber Bragg grating sensors attached to the elastomer evenly near the sensing optical fiber. The comparison results verify that the WLI method achieves better linear relation and repeatability than fiber Bragg grating. The WLI force-monitoring ring provides a high-precision and low-cost method for bridge cable force monitoring.
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Ishiji, Kotaro, Seiji Kawado, Yasuharu Hirai, and Shinji Nagamachi. "Warpage Structure of 4H-SiC after Implantation and Annealing Processes." Materials Science Forum 858 (May 2016): 544–48. http://dx.doi.org/10.4028/www.scientific.net/msf.858.544.

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The warpage structure of 4°-off-axis (0001) 4H-SiC samples after implantation and annealing processes was investigated using white light interferometry (WLI) and X-ray rocking curve (XRC) measurements. The WLI images showed that the surface warpage of the 300 °C-implanted/annealed SiC sample was small and almost the same as that of the un-implanted SiC sample, but the 30 and 150 °C-implanted/annealed SiC samples had a typically saddle-like warpage. The XRCs of the 0008-reflection were measured using monochromatic X-rays with different energies to change the X-ray penetration depth. The subtracted XRCs were reconstructed, and then the depth-dependence of the curvature radius of the 0008-reflection was evaluated. The results indicated that the saddle-like warpage of the 30 and 150 °C-implanted/annealed samples relaxed with increasing depth.
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Lv, Haifeng, Xianglong Kong, Jie Ren, Xuefeng Zhao, and Changsen Sun. "Research on Real-Time Monitoring of Strain Behavior of Concrete under Freezing-Thawing Cycle by White Light Interferometer." Advances in Materials Science and Engineering 2022 (January 25, 2022): 1–7. http://dx.doi.org/10.1155/2022/8049092.

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To study the degenerative process of concrete subjected to freezing-thawing (F-T) cycles in real-time, the strain behavior of concrete cylinder was monitored by a fiber optic F-T testing method based on the white light interferometer (WLI) technique. The principle of the WLI technique was described in detail and the design of the fiber optic testing method. Two mixed proportions of concrete immersed in 3.5% NaCl solution were tested in a freeze-thaw testing machine. The theory and method of temperature compensation were stated in detail. The results indicated that the variation of strain decreases in the cooling stage and increases in the heating stage in a F-T cycle. The residual strain was generated in the test.
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Wang, Xiaofan, Jiliang Mo, Huajiang Ouyang, Zaiyu Xiang, Wei Chen, and Zhongrong Zhou. "Simultaneous energy harvesting and tribological property improvement." Friction 9, no. 5 (February 27, 2021): 1275–91. http://dx.doi.org/10.1007/s40544-020-0467-z.

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AbstractIn this study, piezoelectric elements were added to a reciprocating friction test bench to harvest friction-induced vibration energy. Parameters such as vibration acceleration, noise, and voltage signals of the system were measured and analyzed. The results show that the piezoelectric elements can not only collect vibration energy but also suppress friction-induced vibration noise (FIVN). Additionally, the wear of the friction interface was examined via optical microscopy (OM), scanning electron microscopy (SEM), and white-light interferometry (WLI). The results show that the surface wear state improved because of the reduction of FIVN. In order to analyze the experimental results in detail and explain them reasonably, the experimental phenomena were simulated numerically. Moreover, a simplified two-degree-of-freedom numerical model including the original system and the piezoelectric system was established to qualitatively describe the effects, dynamics, and tribological behaviors of the added piezoelectric elements to the original system.
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Aizawa, Tatsuhiko, Tomomi Shiratori, Yoshihiro Kira, and Tadahiko Inohara. "Simultaneous Nano-Texturing onto a CVD-Diamond Coated Piercing Punch with Femtosecond Laser Trimming." Applied Sciences 10, no. 8 (April 13, 2020): 2674. http://dx.doi.org/10.3390/app10082674.

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In this study, a CVD (Chemical Vapor Deposition)-diamond coated tungsten carbide cobalt (WC (Co)) punch was trimmed to adjust its surface roughness and to significantly reduce its edge curvature for fine piercing by femtosecond laser processing. Through this laser trimming, the surface quality of the diamond coating and the punch edge profile were improved to less than 0.5 μm at the maximum roughness and 2 μm in the edge width, respectively. In parallel with this improvement of surface quality, the side surface of the diamond coating was modified to include nano-textures via the LIPSS (Laser Induced Periodic Surface Structuring) process. Through the fine piercing process, this nanotexture was transcribed onto the pierced hole surface together with fine shearing of the hole by piercing. WLI (White-Light Interferometry) and SEM (Scanning Electron Microscopy) were utilized to describe this transcription of nanotextures during the piercing process. These semiregular nanotextures with an LIPSS period of 300 nm on the pierced hole surface induced a blue colored surface plasmon.
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Gunasekera, Deshani H. A. T., SzeLee Kuek, Denis Hasanaj, Yinfeng He, Christopher Tuck, Anna K. Croft, and Ricky D. Wildman. "Three dimensional ink-jet printing of biomaterials using ionic liquids and co-solvents." Faraday Discussions 190 (2016): 509–23. http://dx.doi.org/10.1039/c5fd00219b.

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1-Ethyl-3-methylimidazolium acetate ([C2C1Im][OAc]) and 1-butyl-3-methylimidazolium acetate ([C4C1Im][OAc]) have been used as solvents for the dissolution and ink-jet printing of cellulose from 1.0 to 4.8 wt%, mixed with the co-solvents 1-butanol and DMSO. 1-Butanol and DMSO were used as rheological modifiers to ensure consistent printing, with DMSO in the range of 41–47 wt% producing samples within the printable range of a DIMATIX print-head used (printability parameter < 10) at 55 °C, whilst maintaining cellulose solubility. Regeneration of cellulose from printed samples using water was demonstrated, with the resulting structural changes to the cellulose sample assessed by scanning electron microscopy (SEM) and white light interferometry (WLI). These results indicate the potential of biorenewable materials to be used in the 3D additive manufacture process to generate single-component and composite materials.
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Li, Gui Yu, Jian Feng Li, and Jie Sun. "Influences of Processing Parameters on Hole Shape Accuracy in Drilling Carbon Fiber Reinforced Composite." Advanced Materials Research 325 (August 2011): 375–80. http://dx.doi.org/10.4028/www.scientific.net/amr.325.375.

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Drilling parameters have great influences on hole accuracy and defect production. In this study, single factor test is applied to obtain the relationship between the torque deviation and the spindle speed n at different feeds per revolution fr. White Light Interferometer (WLI) is applied to measure the hole shape. Based on the frequency domain analysis of torque deviation, the cause of hole shape deviation is investigated. Relationship between the hole shape accuracy and drilling parameters is established, which can be used to predict the hole shape by analyzing the torque deviation. Moreover, the reasonable processing parameters can be selected to obtain drilling hole with ideal shape and satisfying production efficiency.
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Guo, Qi, Xiu Jie Jia, Shuo Li, Yan Yan Nie, and Shun Xin Ge. "Research on the Decoating Effect and Microstructure of Surface Damage of High-Pressure Waterjet." Applied Mechanics and Materials 541-542 (March 2014): 180–84. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.180.

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The high-pressure water jet is utilized to perform impact test on coated surfaces with different hardness. The decoating effect is measured and the surface roughness change can be tested by White-light Interferometer (WLI). Also the microstructure of surface damage after impact test is analyzed. The result shows that when utilizing high-pressure water jet to clean the coating, it’s a better choice to start at the place where the coating is broken. The gap will be enlarged rapidly and the decoating velocity will increase linearly. Otherwise, the impact of water jet will cause surface damages and generate holes of particular shape. This kind of hole is flat in the middle, then forming a sunken district and apophysis successively along the radius outwards.
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Buchheit, Olivier, Claire Arnoult, Fatima Eddoumy, Doriane Del Frari, Jean Di Martino, and David Ruch. "COMBINING WLI AND SEM TECHNIQUES TO OBTAIN A 4D SURFACE IMAGE OF A ppHDMSO/AlCeO3 NANOCOMPOSITE." Image Analysis & Stereology 29, no. 1 (May 3, 2011): 27. http://dx.doi.org/10.5566/ias.v29.p27-34.

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Compositional images from a SEM (scanning electron microscope) are sometimes complemented by quantitative topographical data from devices such as an AFM (atomic force microscope) or WLI (white light interferometer). Indeed, even if a SEM could provide both kinds of information (composition and topography), the topographical data are incomplete because the SEM does not allow measuring the vertical dimension (i.e., perpendicular to the measurement plane). Thus these two kinds of information are usually measured using two different techniques, and at different locations on the sample. Mean values of surface composition are then linked to mean values of topography, and as a consequence this approach does not allow precisely linking a local topographical peak to its corresponding composition. The present work deals with a SEM/WLI combination methodology, based on the characterization, at the same location, of a nanocomposite (nanoparticles of AlCeO3 dispersed in a plasma-polymerized hexamethyldisiloxane ppHMDSO matrix and deposited by atmospheric plasma on a glass substrate) developed for improving anticorrosion properties. SEM images allow the supposition that the protuberances (peaks) observed on the surface of a specimen are linked to the nanoparticles dispersed in the polymer coating, but this link is not fully convincing. Thanks to a precise localization method, SEM compositional data and WLI topographical data are here measured at the same location. The recombination of both signals to form a 4D image (3D geometry and 1D composition) allows linking protuberances to nanoparticles aggregates without ambiguity. This composite image appears to be an interesting new tool (at the scale of observation, i.e., hundreds of micrometers) for the study of nanostructured coatings.
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Dissertations / Theses on the topic "White Light Interferometry (WLI)"

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Bora, Ethem. "Cylindrical Surface Analysis with White Light Interferometry." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-15308.

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At present, one of the big challenges is to develop a precise surface measurement method for mechanical parts. Especially, to study cylindrical surface, the cause of many difficulties because of its geometry shape. This thesis presents a quite good solution for analyzing topography of cylindrical surface with White Light Interferometry optical system which is one of the important and suitable tools in optics. In the construction period, the aim was to build a system which can be easily mounted on the sample. This is done by a very simple and compact design that also enables us to use it in research laboratories. In the project, a cylindrical surface analysis is achieved by taking subsequent images with different nano-scale distance from the sample and stitched the acquired images. To achieve this implementation, subsequent images with the highest intensity are first determined and then located in a single image. In the stitching process, cross correlation method that is extremely useful to find out relative point of the images is used to merge the acquired images. Additionally, stitching process is helped us to extend the area where research can be done. In the project, MATLAB & LABVIEW are used for analyzing the images and controlling the motors, respectively.
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Sathiamoorthy, Karthick, and Tanjim Ahmed. "Construction and Validation of a White Light Interferometer." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-14378.

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White light interferometry is a well-developed and very old technique for optical measurements. The thesis describes the design of a vertical scan interferometer system to study the surface topography of surfaces down to nanometers. The desired properties of the system are its simplicity, portability and compact size, making it suitable for use in general labs and for educational purposes. By acquiring a sequence of images of the deformed fringe pattern, the surface topography can be observed, giving greater understanding of the surface roughness. The principle behind the system is coherence peak sensing where the resulting fringe pattern of the object gets changed in accordance with its surface topography. To accomplish this, individual components of the interferometer were studied and a prototype was built in the lab. A series of experiments were performed which validate the working of the system. The results of the validation which are produced in the report give the accuracy of the system. The output from the prototype interferometer is processed by MATLAB to decode the surface topography of the object under measurement. The design of the prototype is also discussed. Possible application of this device for sensing the surface topography of a cylindrical object is also put forward. Even-though the white light interferometer is more common, making them simple and cost effective will be more advantageous for the whole research community.
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Gianto, Gianto. "Multi-dimensional Teager-Kaiser signal processing for improved characterization using white light interferometry." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD026/document.

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L'utilisation de franges d'interférence en lumière blanche comme une sonde optique en microscopie interférométrique est d'une importance croissante dans la caractérisation des matériaux, la métrologie de surface et de l'imagerie médicale. L'Interférométrie en lumière blanche est une technique basée sur la détection de l'enveloppe de franges d'interférence. Il a été démontré antérieurement, la capacité des approches 2D à rivaliser avec certaines méthodes classiques utilisées dans le domaine de l'interférométrie, en termes de robustesse et de temps de calcul. En outre, alors que la plupart des méthodes tiennent compte seulement des données 1 D, il semblerait avantageux de prendre en compte le voisinage spatial utilisant des approches multidimensionnelles (2D/3D), y compris le paramètre de temps afin d'améliorer les mesures. Le but de ce projet de thèse est de développer de nouvelles approches n-D qui sont appropriées pour une meilleure caractérisation des surfaces plus complexes et des couches transparentes
The use of white light interference fringes as an optical probe in microscopy is of growing importance in materials characterization, surface metrology and medical imaging. Coherence Scanning Interferometry (CSI, also known as White Light Scanning Interferometry, WSLI) is well known for surface roughness and topology measurement [1]. Full-Field Optical Coherence Tomography (FF-OCT) is the version used for the tomographic analysis of complex transparent layers. Both techniques generally make use of some sort of fringe scanning along the optical axis and the acquisition of a stack of xyz images. Image processing is then used to identify the fringe envelopes along z at each pixel in order to measure the positions of either a single surface or of multiple scattering objects within a layer.In CSI, the measurement of surface shape generally requires peak or phase extraction of the mono dimensional fringe signal. Most of the methods are based on an AM-FM signal model, which represents the variation in light intensity measured along the optical axis of an interference microscope [2]. We have demonstrated earlier [3, 4] the ability of 2D approaches to compete with some classical methods used in the field of interferometry, in terms of robustness and computing time. In addition, whereas most methods only take into account the 1D data, it would seem advantageous to take into account the spatial neighborhood using multidimensional approaches (2D, 3D, 4D), including the time parameter in order to improve the measurements.The purpose of this PhD project is to develop new n-D approaches that are suitable for improved characterization of more complex surfaces and transparent layers. In addition, we will enrich the field of study by means of heterogeneous image processing from multiple sensor sources (heterogeneous data fusion). Applications considered will be in the fields of materials metrology, biomaterials and medical imaging
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Oliveira, Rafael Figueiredo de. "Evaluation of Proposed Natural Corrosion Inhibitors for X-52 Carbon Steel in Ethanol Media." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1448385629.

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Hissmann, Michael. "Bayesian estimation for white light interferometry." Berlin Pro Business, 2005. http://shop.pro-business.com/product_info.php?products_id=357.

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Ferri, Carlo. "White light interferometry in measurements of micro volumes." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/54574/.

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A procedure for measuring micro-volumes of solids with irregular and complex boundaries of both concave and convex forms has been developed. Advantages, limitations and potential applications of the developed procedure are identified and discussed. The precision of this procedure is demonstrated in the case of a con vex form. In the light of the key role of metrology in the current trend toward product miniaturisation, the need for dedicating resources and effort to assessing quantitatively the performances of measuring processes is most apparent. The developed procedure is based on white light interferometric microscopy. In order to enable the deployment of this measuring system in the developed procedure and in agreement with the centrality of metrology mentioned above, an investigation of white light interferometric microscopy has been carried out from a user perspective. In particular, two sources of variability were identified and experimentally quantified and the precision in repeatability conditions was estimated when measuring length along the z-axis in a pre-specified micro-metric range. A critical analysis of the calibration procedure built in the investigated microscope has also been conducted. In order to overcome the pitfalls discovered in such an analysis, a spline-based calibration procedure has been developed and demonstrated. In addition, the control methods needed for the practical usage of the proposed calibration procedure have been developed. Calibration studies are made possible by the provision of traceable reference materials. Therefore, a cost-effective and versatile procedure for the build ing of traceable reference samples of length in the micrometric range was developed. The proposed method used standard gauge blocks commonly found in metrology laboratories.
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Bhatia, Vikram. "Signal processing techniques for optical fiber sensors using white light interferometry." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09192009-040440/.

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Yu, Bing. "Development of Tunable Optical Filters for Interrogation of White-Light Interferometric Sensors." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/27496.

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Interferometric fiber optic sensors have been extensively used to measure a large variety of physical, chemical and biomedical parameters due to their superior performance. At the Center for Photonics Technology of Virginia Tech, a variety of interferometric fiber optic sensors have been developed in recent years, for efficient oil recovery, partial discharge detection in high voltage transformers, pressure sensing in gas turbine engines, and temperature measurements in gasifiers and boilers. However, interrogating an interferometric sensor involves accurate recovery of a measurand from the phase-modulated lightwaves, and has been a challenge for high performance, high speed, and low-cost, to current white-light interferometry (WLI) techniques, such as the widely used scanning WLI (S-WLI) and spectral-domain WLI (SD-WLI). The performance of a white-light interferometric sensing system depends not only on the design of the probes, but also, to a great extent, on the interrogation strategy to be used. In this Ph.D. research, a tunable optical filter based WLI (TOF-WLI) is proposed and validated as a low cost, yet high performance, solution to the interrogation of various types of interferometric sensors. In addition to the capability of linear/quadrature demodulation, TOF-WLI retains all the features of WLI, is compatible with the SD-WLI, and can be tailored for both static and wideband signals. It also has great potential in surface metrology and biomedical imaging as well as optical spectroscopy. The key, to the success of this new approach in competition with the other available WLI techniques, is that the tunable optical filter (TOF) must be specially designed for sensing and extremely low cost. Therefore, two novel TOFs, a diffraction grating tunable filter (DG-TOF) and an extrinsic Fabry-Perot tunable filter (EFP-TF), are proposed and demonstrated. Laboratory and field test results on using the DG-TOF WLI for partial discharge and thermal fault detection in high voltage power transformers, and the EFP-TF WLI in temperature sensor systems and a turbine engine monitoring system will also be presented to demonstrate the feasibility for efficient sensor interrogation.
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Li, Beinan. "Optical audio reproduction for stereo phonograph records by using white-light interferometry and image processing." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103586.

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This dissertation presents an optical approach for reproducing stereo audio from the stereo disc phonograph records (LPs). Since the late nineteenth century, as one of the most influential recording technologies, the phonograph recording has enjoyed its popularity and produced numerous cylinders and discs that carry speeches, music, and all kinds of audio cultural heritage. The preservation of phonograph sound recordings is thus of world-wide concern. This research provides an alternative approach to digitizing the stereo disc phonograph records, potentially for long-term preservation, by optically acquiring the 3D disc record surface profile and extracting the audio signals from the record surface profile images by using software algorithms. The dissertation discusses the workflow of optically reproducing stereo audio from the stereo disc phonograph records by using the white-light interferometry technique. This workflow includes the acquisition of the 3D disc record surface profile by using a commercial white-light interferometry microscope, the extraction of the record groove undulations, which encodes the stereo audio information, by using our custom image processing algorithms, and finally the reproduction of the stereo audio signal from the groove undulations through signal processing. The workflow is evaluated with a test stereo record containing standard sinusoid signals and a musical record. The quality of the optically-reproduced audio is quantitatively evaluated and compared with that of the audio digitized by a turntable. The dissertation contains three main parts. The first include an introduction to the general background of the optical audio reproduction for the stereo disc phonograph records and the review of the phonograph recording technology, the previous efforts in optically reproducing audio from the cylinder and disc phonograph records, and the relevant optical techniques including the white-light interferometry. The second part focuses on our complete workflow for optically reproducing the stereo audio from the stereo disc phonograph records. This is followed by the evaluation of our workflow and the output audio quality. The dissertation concludes by introducing the challenges and the possible directions in the future development of our optical audio reproduction workflow.
Cette thèse présente une nouvelle approche de reproduction optique d'enregistrements phonographiques stéréo. L'enregistrement phonographique s'est imposé, vers la fin du XIXème siècle, comme la technologie d'enregistrement de référence partout dans le monde. Il existe donc une pléthore de cylindres et autres disques où ont été gravés discours, morceaux de musique, et autres artefacts culturel sonores. La préservation de ces enregistrements sonores phonographiques est donc une préoccupation mondiale. Le présent travail de recherche propose une approche alternative de numérisation des enregistrements phonographiques stéréo en vue de leur éventuelle préservation. En effet, à partir de l'acquisition optique du profil (en trois dimensions) de la surface d'enregistrement du disque, les signaux audio peuvent être reconstruits grâce à nos algorithmes d'analyse d'images. Cette thèse examine les étapes de la reproduction optique audio stéréo à partir d'enregistrements phonographiques sur disques stéréo en utilisant l'interférométrie en lumière blanche. Ces étapes comportent: l'acquisition du profil de la surface d'enregistrement d'un disque 3D en utilisant un microscope commercial interférométrique en lumière blanche ; l'extraction des ondulations du sillon, qui encode l'information audio stéréo en utilisant nos algorithmes de traitement d'images ; et finalement, la reproduction du signal audio stéréo depuis les ondulations du sillon par des techniques de traitement du signal. Le processus complet est évalué sur un enregistrement stéréo test comprenant des signaux sinusoïdaux et un enregistrement musical. La qualité de l'audio reproduit par voie optique est évaluée de façon quantitative et comparée avec celle de l'audio numérisé de manière « traditionnelle », à l'aide d'une platine. Cette thèse s'articule en trois parties. La première comporte une introduction des principes nécessaires à la reproduction d'enregistrements phonographiques stéréo par voie optique. Plus précisément, les principes de la technologie d'enregistrement phonographique sont passés en revue ; l'état de l'art des efforts de reproduction optique des enregistrements phonographiques sur disques et cylindres est présenté ; et enfin, les techniques optiques pertinentes incluant l'interférométrie en lumière blanche sont décrites. La deuxième partie livre une présentation détaillée du processus de reproduction optique que nous avons développé. Dans la troisième partie, l'évaluation quantitative de la qualité de la restitution du signal audio obtenue par notre procédé est aussi décrite. La thèse se conclue sur un bilan des défis et des directions possibles dans le futur développement de notre approche de reproduction des signaux audio par voie optique.
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Wylde, Clarissa Eileen Kenney, and Clarissa Eileen Kenney Wylde. "The Art of Optical Aberrations." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624090.

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Art and optics are inseparable. Though seemingly opposite disciplines, the combination of art and optics has significantly impacted both culture and science as they are now known. As history has run its course, in the sciences, arts, and their fruitful combinations, optical aberrations have proved to be a problematic hindrance to progress. In an effort to eradicate aberrations the simple beauty of these aberrational forms has been labeled as undesirable and discarded. Here, rather than approach aberrations as erroneous, these beautiful forms are elevated to be the photographic subject in a new body of work, On the Bright Side. Though many recording methods could be utilized, this work was composed on classic, medium-format, photographic film using white-light, Michelson interferometry. The resulting images are both a representation of the true light rays that interacted on the distorted mirror surfaces (data) and the artist’s compositional eye for what parts of the interferogram are chosen and displayed. A detailed description of the captivating interdisciplinary procedure is documented and presented alongside the final artwork, CCD digital reference images, and deformable mirror contour maps. This alluring marriage between the arts and sciences opens up a heretofore minimally explored aspect of the inextricable art-optics connection. It additionally provides a fascinating new conversation on the importance of light and optics in photographic composition.
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Books on the topic "White Light Interferometry (WLI)"

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Zuliani, Gary Louis. Demodulation of a fiber Fabry-Perot strain rosette using white light interferometry. [Downsview, Ont.]: University of Toronto, Graduate Dept. of Aerospace Science and Engineering, 1993.

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Zuliani, Gary Louis. Demodulation of a fiber Fabry-Perot strain rosette using white light interferometry. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1993.

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Book chapters on the topic "White Light Interferometry (WLI)"

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Schmit, Joanna, and Anna Pakuła. "White Light Interferometry." In Handbook of Advanced Non-Destructive Evaluation, 1–47. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-30050-4_42-1.

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Schmit, Joanna, and Anna Pakuła. "White Light Interferometry." In Handbook of Advanced Nondestructive Evaluation, 421–67. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-26553-7_42.

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Bauer, Wilfried, Mark Weber, and Sirichanok Chanbai. "White Light Interferometry." In Encyclopedia of Tribology, 4115–27. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_320.

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Horn, Alexander. "White-Light Interferometry." In The Physics of Laser Radiation–Matter Interaction, 397–406. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15862-9_19.

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Boone, Pierre. "From Coherent Speckle Photography to White Light Scratch Correlation." In Interferometry in Speckle Light, 51–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-57323-1_7.

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Carazo-Alvarez, Juan D., and Eann A. Patterson. "Recording and Processing Digital Caustic Images from White Light." In Interferometry in Speckle Light, 599–606. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-57323-1_75.

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Dändliker, R., E. Zimmermann, U. Schnell, and Y. Salvadé. "Multiple-Wavelength and White-Light Interferometry." In Laser in Forschung und Technik / Laser in Research and Engineering, 425–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80263-8_93.

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Baldi, Antonio, Filippo Bertolino, Francesco Ginesu, and Mario Lera. "An Application of White Light Profilometry Using Geometric Phase Shifting." In Interferometry in Speckle Light, 453–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-57323-1_56.

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Heikkinen, Ville Vili, Anton Nolvi, Tor Paulin, Jeremias Seppä, Ivan Kassamakov, Antti Lassila, and Edward Hæggström. "Traceable Quasi-dynamic Stroboscopic Scanning White Light Interferometry." In Fringe 2013, 491–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36359-7_86.

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Ulrich, R. "Interferometric and Polarimetric Sensors Using White-Light Interferometry." In Springer Proceedings in Physics, 62–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-75088-5_11.

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Conference papers on the topic "White Light Interferometry (WLI)"

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Zhao, Linjie, Ping Zhou, Ying Yan, Qian Bai, YiQi Wang, and Dongming Guo. "Surface roughness measurement accuracy analysis of grinded silicon wafer by white light scanning interferometry (WLSI)." In Optical Measurement Systems for Industrial Inspection XI, edited by Peter Lehmann, Wolfgang Osten, and Armando Albertazzi Gonçalves. SPIE, 2019. http://dx.doi.org/10.1117/12.2525241.

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Kelton, Randall, Jalal Fathi, Efstathios I. Meletis, and Haiying Huang. "Study of the Surface Roughness Evolution of Pinned Fatigue Cracks, and its Relation to Crack Pinning Duration and Crack Propagation Rate Between Pinning Points." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70729.

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Abstract:
Changes in surface morphology have long been thought to be associated with crack propagation in materials. In this paper, we study the changes in the surface profile of the crack-tip plastic zone with an attempt to understand the relationship between the plasticity-induced surface profile changes and the crack growth behavior. Center crack specimens were electropolished and etched to reveal the grain structure for white light interferometer (WLI) imaging prior to and during fatigue testing. After growing the crack to a predetermined pre-crack length, a viewing zone was selected outside of the plastic zone of the pre-crack. The surface profile of the viewing zone was imaged using a WLI microscope at selected fatigue cycle intervals. An image processing algorithm was developed to evaluate the changes of the surface profile. We observed that the crack growth rate is not uniform at the microscopic scale; the crack growth was retarded at crack pinning points and the crack grows at a faster rate while propagating between the pinning points. Relatively large surface topology changes were observed to be constrained to the area surrounding the tip of pinned cracks. However, there was an avalanche of surface changes covering the entire monotonic zone upon the crack being released from a pinned location. Interestingly enough, minor or no measurable surface changes could be seen for propagating cracks. These results indicate a surface roughness change threshold may exist for predicting the duration during which a crack is pinned. Results suggest the threshold and crack propagation rate between pinning locations may be functions of the amplitude of the stress intensity factor.
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Wyant, James C. "White light interferometry." In AeroSense 2002, edited by H. John Caulfield. SPIE, 2002. http://dx.doi.org/10.1117/12.474947.

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Johnson, Mark. ""White light" interferometry." In London - DL tentative, edited by P. McGeehin. SPIE, 1990. http://dx.doi.org/10.1117/12.21992.

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Erskine, David J., and Neil C. Holmes. "White light velocity interferometry." In Proceedings of the conference of the American Physical Society topical group on shock compression of condensed matter. AIP, 1996. http://dx.doi.org/10.1063/1.50760.

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Schwider, Johannes, and Liang Zhou. "Dispersive white-light profilometer." In International Conference on Interferometry '94, edited by Malgorzata Kujawinska and Krzysztof Patorski. SPIE, 1994. http://dx.doi.org/10.1117/12.195934.

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Liu, Qiang, Shimin Li, Da-Peng Zhou, Zhenguo Jing, and Wei Peng. "Compressed-sensing white light interferometry." In Optical Sensors. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/sensors.2021.sm5a.2.

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Tao, Chunkan, Weiyi Wang, Yijun Zhang, Yujing Wu, and Yunsheng Qian. "Application of white-light phase-shifting in white-light scanning interferometry." In Applications of Digital Image Processing XL, edited by Andrew G. Tescher. SPIE, 2017. http://dx.doi.org/10.1117/12.2272858.

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Pavlicek, Pavel, and Erik Mikeska. "White-light interferometry without depth scan." In 21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, edited by Pavel Zemánek. SPIE, 2018. http://dx.doi.org/10.1117/12.2517877.

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Kitagawa, Katsuichi. "Recent trends in white-light interferometry." In Optics East 2006, edited by Peisen S. Huang. SPIE, 2006. http://dx.doi.org/10.1117/12.693634.

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Reports on the topic "White Light Interferometry (WLI)"

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Ashcom, Jonathan B. White Light Heterodyne Interferometry SNR. Fort Belvoir, VA: Defense Technical Information Center, April 2015. http://dx.doi.org/10.21236/ada616869.

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