International Conference on Holography, Optical Recording, and Processing of Information最新文献_第4页

Polarization gratings in sol-gel thin films investigated through the moving grating technique 利用移动光栅技术研究了溶胶-凝胶薄膜中的偏振光栅

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677301

R. Raschellà, I. Marino, P. P. Lottici, D. Bersani

引用次数: 0

High resolution coherent optical reconstruction of digital holograms and their applications 数字全息图的高分辨率相干光学重建及其应用

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677161

A. Hermerschmidt, Gunther Wernicke, S. Krüger, A. Langner, H. Gruber, M. Dürr

引用次数: 0

Testing of fibers reinforced composite vessel by fringes projection and speckle shear interferometry 用条纹投影和散斑剪切干涉法测定纤维增强复合材料容器

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677286

V. Sainov, J. Harizanova, Sonja Ossikovska, W. Van Paepegem, J. Degrieck, P. Boone

{"title":"Testing of fibers reinforced composite vessel by fringes projection and speckle shear interferometry","authors":"V. Sainov, J. Harizanova, Sonja Ossikovska, W. Van Paepegem, J. Degrieck, P. Boone","doi":"10.1117/12.677286","DOIUrl":"https://doi.org/10.1117/12.677286","url":null,"abstract":"Fringes projection and speckle shear interferometry are used for testing of subjected to cycling loading (pressure) composite vessel. As the sensitivity of the applied methods could vary in broad limits in comparison with the other interferometric techniques, the inspection is realized in a wide dynamic range. Two spacing phase stepping fringes projection interferometry is applied for absolute coordinate measurement. Derivatives of in-plane and out-of-the-plane components of the displacement vector over the object surface are obtained by lateral speckle shear interferometry in static loading (pressure). Non-linear mechanical response and fatigue of composite material are clearly detected after cyclic sinusoidal loading by macro measurement using lateral speckle shear interferometry. Fringes projection and speckle-shear interferometry are suitable for shape and normal displacements measurements in a wider dynamic range. The other advantage of the shown methods is connected with the possibility to realize compact and portable devices for in-situ inspection of investigated objects - machine parts and constructions.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128412145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Threshold selection in transform-domain denoising of speckle pattern fringes 散斑条纹变换域去噪中的阈值选择

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677284

A. Shulev, A. Gotchev, A. Foi, I. Roussev

引用次数: 11

Computer acquisition of 3D images utilizing dynamic speckles 利用动态散斑的三维图像的计算机采集

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677058

A. Kamshilin, D. Semenov, E. Nippolainen, E. Raita

{"title":"Computer acquisition of 3D images utilizing dynamic speckles","authors":"A. Kamshilin, D. Semenov, E. Nippolainen, E. Raita","doi":"10.1117/12.677058","DOIUrl":"https://doi.org/10.1117/12.677058","url":null,"abstract":"We present novel technique for fast non-contact and continuous profile measurements of rough surfaces by use of dynamic speckles. The dynamic speckle pattern is generated when the laser beam scans the surface under study. The most impressive feature of the proposed technique is its ability to work at extremely high scanning speed of hundreds meters per second. The technique is based on the continuous frequency measurements of the light-power modulation after spatial filtering of the scattered light. The complete optical-electronic system was designed and fabricated for fast measurement of the speckles velocity, its recalculation into the distance, and further data acquisition into computer. The measured surface profile is displayed in a PC monitor in real time. The response time of the measuring system is below 1 μs. Important parameters of the system such as accuracy, range of measurements, and spatial resolution are analyzed. Limits of the spatial filtering technique used for continuous tracking of the speckle-pattern velocity are shown. Possible ways of further improvement of the measurements accuracy are demonstrated. Owing to its extremely fast operation, the proposed technique could be applied for online control of the 3D-shape of complex objects (e.g., electronic circuits) during their assembling.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127131788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Examination of the temporal and kinetic effects in acrylamide based photopolymer using the nonlocal polymer driven diffusion model (NPDD) 基于非局部聚合物驱动扩散模型(NPDD)研究丙烯酰胺基光聚合物的时间和动力学效应

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.676506

J. Kelly, M. R. Gleeson, F. O'Neill, J. Sheridan, S. Gallego, C. Neipp

{"title":"Examination of the temporal and kinetic effects in acrylamide based photopolymer using the nonlocal polymer driven diffusion model (NPDD)","authors":"J. Kelly, M. R. Gleeson, F. O'Neill, J. Sheridan, S. Gallego, C. Neipp","doi":"10.1117/12.676506","DOIUrl":"https://doi.org/10.1117/12.676506","url":null,"abstract":"The Nonlocal Polymer Driven Diffusion (NPDD) model successfully predicts high spatial frequency cut-off and higher harmonic generation, experimentally evident in holographic gratings recorded in free radical chain photopolymer materials. In this paper the NPDD model is extended to include a nonlocal material temporal response. Previously it was assumed that following a brief transient period, the spatial effect of chain growth was instantaneous. However, where the use of short exposures is necessary, as in optical data storage, temporal effects become more significant. Assuming that the effect of past chain initiations will have less effect on monomer concentration at a later point in time than current initiations, a normalized exponential function is proposed to describe the process. The extended diffusion model is then solved using a Finite-Difference Time-Domain technique to predict the evolution of the monomer and polymer concentrations during and after grating recording. The Lorentz-Lorenz relation is used to determine the corresponding refractive index modulation and The Rigorous Coupled Wave Method applied to determine and/or process diffraction efficiencies. A fitting technique is then used which first solves the diffusion model as described and determines a set of parameters which give best fits to the experimental data. Results show that the inclusion of the nonlocal temporal response is necessary to accurately describe grating evolution for short exposures i.e. continued polymer chain growth for some period after recording resulting in an increase in the refractive index modulation. Monomer diffusion is also shown to influence refractive index modulation post-exposure. Monomer diffusion rates determined to be of the order of D ~ 10-11 cm2/s and the time constant of the nonlocal material temporal response function being of the order of τn ~ 10-2s.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114565758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optical response of very thin As-Se films 极薄As-Se薄膜的光学响应

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677012

P. Gushterova, P. Sharlandjiev, K. Petkov

{"title":"Optical response of very thin As-Se films","authors":"P. Gushterova, P. Sharlandjiev, K. Petkov","doi":"10.1117/12.677012","DOIUrl":"https://doi.org/10.1117/12.677012","url":null,"abstract":"Thin chalcogenide (As-S, As-Se, Ge-Se, etc.) films find applications in many branches of modern optics: for design of optical systems operating in VIS and IR, as recording material for holographic storage, or as inorganic photoresists, etc. Very thin films are included in multi-layered CD-R and DVD structures for improvements of their performance and increase of storage capacity. That is why developments of different methods for determination of optical constants (n - refractive index, k - extinction coefficient and d - physical thickness) best adapted for concrete optical problems are still needed. Recently we have presented a method for (n, k, d) evaluation of very thin metal or semiconductor films from spectrophotometric data. Here we present investigation of the optical constants of vacuum deposited As-Se thin layers with d between 15 and 30 nm. The dispersion of the complex refractive index is studied in the spectral range of 400 - 1000 nm. The obtained results are interpreted within the frame of single oscillator Wemple-DiDomenico model. Comparison is made with data on thicker evaporated layers. We demonstrate the importance of the analysis of the uncertainties in (n, k, d) determination for the adequate choice of the film physical thickness.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128272623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Two way diffusion model for the recording mechanism in a self developing dry acrylamide photopolymer 自研干型丙烯酰胺光聚合物记录机理的双向扩散模型

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.676501

S. Martin, I. Naydenova, J. Raghavendra, R. Howard, V. Toal

引用次数: 17

Optical characteristics of biopolymer films from gelatin, mannan, and glucomannan 由明胶、甘露聚糖和葡甘露聚糖制成的生物聚合物薄膜的光学特性

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.676747

K. Nikolova, I. Panchev, S. Sainov, K. Pavlova

引用次数: 2

Analysis of the complex light field generated by a deflectable mirror array device 可偏转镜阵列装置产生的复杂光场分析

International Conference on Holography, Optical Recording, and Processing of Information Pub Date : 2006-05-20 DOI: 10.1117/12.677163

Erdem Ulusoy, L. Onural, Haldun M. Özaktas

引用次数: 0