The International Commission for Optics最新文献_第6页

Characterization of acoustically induced deformations of human tympanic membranes by digital holography and shearography 用数字全息和剪切术表征人鼓膜声致变形

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903595

J. M. Flores-Moreno, C. Furlong, J. Cheng, J. Rosowski, S. Merchant

{"title":"Characterization of acoustically induced deformations of human tympanic membranes by digital holography and shearography","authors":"J. M. Flores-Moreno, C. Furlong, J. Cheng, J. Rosowski, S. Merchant","doi":"10.1117/12.903595","DOIUrl":"https://doi.org/10.1117/12.903595","url":null,"abstract":"Recently, we introduced a Digital Optoelectronic Holographic System (DOEHS) for measurement of acoustically induced deformations of the human tympanic membrane (TM) in order to study and diagnose pathologic conditions of the middle-ear. The DOEHS consists of laser-delivery illumination (IS), optical head (OH), image-processing computer (IP), and positioning arm (PS) subsystems. Holographic information is recorded by a CCD and numerically reconstructed by Fresnel approximation. Our holographic otoscope system is currently deployed in a clinic and is packaged in a custom design. Since digital holography is a high sensitivity measurement technique and the interfering light waves travel along different paths, it makes measurements acquired by DOEHS susceptible to external vibrations. In order to avoid this susceptibility, we are testing a shearography setup as OH. Shearography presents same advantages as holographic interferometry, but it is less susceptible to vibration and external noise, which is a characteristic needed for the use of our techniques in a clinical environment. In this paper we present work in progress in our development of a shearography technique based on a Mach-Zehnder configuration as OH and demonstrate its application by quantifying vibrations modes in thin membranes, including human TM. Results are compared with those obtained with DOEHS.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115719213","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: 2

Wendland radial basis functions applied as filters on computed tomography Wendland径向基函数在计算机断层扫描中的应用

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903420

J. Aguilar, L. Berriel-Valdos, J. F. Aguilar

引用次数: 1

Organic solar cells under the BHJ approach using conventional/inverted architectures BHJ方法下的有机太阳能电池采用传统/倒置结构

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902295

J. Salinas, C. Salto, J. Maldonado, G. Ramos‐Ortiz, M. Rodríguez, M. Meneses-Nava, O. Barbosa-García, N. Fárfan, R. Santillán

{"title":"Organic solar cells under the BHJ approach using conventional/inverted architectures","authors":"J. Salinas, C. Salto, J. Maldonado, G. Ramos‐Ortiz, M. Rodríguez, M. Meneses-Nava, O. Barbosa-García, N. Fárfan, R. Santillán","doi":"10.1117/12.902295","DOIUrl":"https://doi.org/10.1117/12.902295","url":null,"abstract":"The search of clean and renewable energy sources is one of the most important challenges that mankind confronts. Recently there has been a notable interest to develop organic photovoltaic (OPV) technology as a mean of renewable energy source since it combines low-cost and easy fabrication. Most of the efforts have been directed to increase the efficiency, leaving aside the durability of the organic materials, however, a new architecture known as inverted solar cell might bring a never seen durability (years) that could make possible large scale applications of this technology. Here are presented the results we achieved using both, the conventional and inverted architectures employing as organic donor (D) the very well known semi-conducting polymer P3HT, in mixtures with the acceptor (A) fullerene PC61BM. The morphology of thin polymer films prepared by using the spin coating technique was analyzed by AFM. For the conventional architecture the cells were fabricated following the structure ITO/PEDOT:PSS/P3HT:PC61BM/Wood´s metal, where the Wood´s metal cathode is an alloy that melts at 75 °C. For the inverted architecture the structure ITO/ZnO/P3HT:PC61BM /PEDOT:PSS/(Ag, Cu or Silver paint) was used, where ITO worked as cathode by switching its work function through the introduction of ZnO nanoparticles. Under tests using Xenon lamp irradiation at 100 mW/cm2, the conventional and the inverted architectures produced efficiencies of 1.75 % and 0.5 %, respectively. For both architectures the chosen back-contact materials (Wood´s metal and silver paint) allowed us to easily make the OPVs cells without the need of vacuum steps.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127439227","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

Resumming divergent series in nonparaxial optics 非近轴光学中发散级数的恢复

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903364

R. Borghi, F. Gori, G. Guattari, M. Santarsiero

引用次数: 0

Calibration of a multispectral camera system using interference filters 用干涉滤光片校正多光谱相机系统

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902105

S. Nishi, S. Tominaga

引用次数: 2

Developing the refractive light beam shapers as lossless apodization systems suppressing the side-lobes in Fourier transform optical systems 在傅里叶变换光学系统中，利用折射率光束整形器作为抑制旁瓣的无损消光系统

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.901944

A. Laskin, A. Shcherbakov, V. Molchanov, V. Laskin, O. Makarov

{"title":"Developing the refractive light beam shapers as lossless apodization systems suppressing the side-lobes in Fourier transform optical systems","authors":"A. Laskin, A. Shcherbakov, V. Molchanov, V. Laskin, O. Makarov","doi":"10.1117/12.901944","DOIUrl":"https://doi.org/10.1117/12.901944","url":null,"abstract":"The Fourier transform optical systems, creating an image and/or realizing its accurate spectral characterization, suffer from appearing remarkable level of side-lobes in the image intensity distribution that reduce performances, in particular, the dynamic range of these systems. Therefore, suppressing side-lobes in the image plane represents an actual practical task being important for various scientific and technical applications such as, for example, direct imaging and spectral characterization of Earth-like extra-solar planets or spectrum analysis of ultra-high frequency radio-wave signals with exploiting an advanced acousto-optical technique. We suggest applying as apodization systems novel refractive optical beam shapers of the field mapping type, which are able to convert the input (more or less) uniform intensity distribution, peculiar to the majority of usually exploited sources of light, to arbitrary pre-scripted intensity distributions. In the case of choosing, for instance, Gaussian, cosine on a pedestal, etc. distributions, these shapers make it possible to minimize the total level of side-lobes significantly and to increase, in doing so, the dynamic range of optical data processing up to 40 dB or more. The operation principle of these beam shapers is based on inducing, in a control manner, spherical aberration in order to provide the required intensity profile transformation and further compensation of that aberration. As a result, the beam shapers operate as telescopes of special type; they produce a low divergence collimated beam with a target intensity distribution and flat wave front. We describe the beam shaper design, implementation examples, and results of practical applications to the acousto-optical technique of precise multi-channel spectrum analysis.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125180096","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: 5

Subsampling technique to enhance the decoded output of JTC encrypting system 采用子采样技术提高JTC加密系统的解码输出

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902195

J. F. Barrera, E. Rueda, C. Ríos, M. Tebaldi, N. Bolognini, R. Torroba

引用次数: 0

Dynamic moiré patterns and Michelson fringe patterns for profilometry: a results comparative analysis 轮廓测量用动态莫尔条纹和迈克尔逊条纹:结果比较分析

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.901933

G. N. Oliveira, M. E. Oliveira, P. A. Santos

引用次数: 2

Rules for optical metrology 光学计量规则

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902826

H. Stahl, James Webb, William O. Jenkings

引用次数: 5

Transverse energy flux estimation in optical vortices by single-slit diffraction 用单缝衍射估计光涡旋的横向能量通量

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903424

Roland A. Terborg, K. Volke-Sepúlveda

引用次数: 0