Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications最新文献_第6页

Criteria for lipid layer pattern evaluation: Pli-marker database 脂质层模式评价标准:Pli-marker数据库

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2030429

C. García-Resúa, Hugo Pena-Verdeal, B. Remeseiro, M. G. Penedo, M. .. Giraldez, E. Yebra-Pimentel

{"title":"Criteria for lipid layer pattern evaluation: Pli-marker database","authors":"C. García-Resúa, Hugo Pena-Verdeal, B. Remeseiro, M. G. Penedo, M. .. Giraldez, E. Yebra-Pimentel","doi":"10.1117/12.2030429","DOIUrl":"https://doi.org/10.1117/12.2030429","url":null,"abstract":"The purpose of this study is to establish the procedure of acquisition and evaluate the Lipid layer pattern (LLP) by Tearscope in order to enhance this useful technique. To aid this purpose, we present a new broad LLP images database (included in a web application called Pli-marker) The tear film lipid layer was examined using a Tearscope-plus (Keeler, Windsor, UK). To capture LLPs videos a Topcon DV-3 digital camera was used and attached to the slit lamp. All videos were stored in a computer via Topcon IMAGEnet i-base software and LLP images were obtained and uploaded at Pli-marker web application, which offers the manual selection of regions associated to a specific LLP. 50 images were analysed by 4 experienced optometrists. Each of them marked (using Pli-marker) those areas in the 50 images that corresponded with some of the 5 LLP: open meshwork (OM), closed meshwork, (CM), wave (W), amorphous (AM) and color fringe (CO). From the 50 images we obtained 25 areas of OM, 22 areas of CM, 20 areas of W, 46 areas of AM and 17 areas of CO that 4 observers were in accordance. We present an example of 4 pictures for each area of concordance together with the description of the features used for categorizing the LLP in our study. This work describes the methodology used in our research project, including settings for capture image, and the criteria for subjective categorization of the LLP accomplished by a set of images.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115575664","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

Full model analysis of the four-wave mixing anti-STOKES component growth in the wavelength-division multiplexing solitons systems near the zero-dispersion wavelength 零色散波长附近波分复用孤子系统中四波混频反stokes分量生长的全模型分析

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2021714

L. Mandeng Mandeng, S. Fewo Ibraid, C. Tchawoua

引用次数: 0

Speckle patterns during the spreading of lung surfactant 肺表面活性剂扩散过程中的斑点

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2026326

J. J. Llovera-González, Alfredo B. Moreno-Yeras, Diana M. Martínez-Muñoz, M. Z. J. Ferreira, Wagner Shin Nishitani, Alexandre Barros Almeida, A. Alencar, M. Muramatsu, Rolando L. Serra-Toledo

引用次数: 0

Study of temperature sensor fiber with high germanium doped core 高掺锗芯温度传感器光纤的研究

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2026158

F. Fávero, M. Becker, R. Spittel, M. Rothhardt, J. Kobelke, H. Bartelt

{"title":"Study of temperature sensor fiber with high germanium doped core","authors":"F. Fávero, M. Becker, R. Spittel, M. Rothhardt, J. Kobelke, H. Bartelt","doi":"10.1117/12.2026158","DOIUrl":"https://doi.org/10.1117/12.2026158","url":null,"abstract":"In the present work, the use of a single mode fiber (SMF) with high Germanium doped core as temperature sensor is studied. The fiber core consists of a 1.1 μm highly germanium doped step index waveguide surrounded by a pedestal of 3.5 μm diameter. The outer diameter of the fiber is 125 μm. A short stub of ~2 mm is used in the fabrication of the interferometer. The highly germanium doped fiber is spliced between two standard SMF. In one of the splices both fibers are ideally aligned, in the other splice a small misalignment between the fibers is done. An annealing process is made for 5 hours at 850°C which results in a good operation stability up to 700°C. A wavelength shift as a function of temperature of 76 pm/°C is reported. To demonstrate the interferometer efficiency, a fiber Bragg grating is written in the highly germanium doped core and tested for temperature response. A temperature sensitivity of 13pm/°C was demonstrated. The interferometer fabrication requires only a few and easy steps. Due to the standard splices made between the fibers, the device is robust. We believe that the sensor may be used under harsh environmental conditions, since it shows a high sensitivity and a small size in combination with great robustness.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124475383","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

Null Ronchi-Hartmann test for an aspheric concave mirror 非球面凹面镜的零Ronchi-Hartmann检验

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2026463

M. Avendaño-Alejo, Gabriel Santiago-Castillo, M. Campos-García, Iván Moreno-Oliva, R. Díaz-Uribe

引用次数: 0

Quantum teleportation using bipartite entangled photon-added non-linear coherent states 利用二部纠缠光子加入非线性相干态的量子隐形传态

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2021611

E. Castro, E. Paez, C. Ladera, A. Zambrano

{"title":"Quantum teleportation using bipartite entangled photon-added non-linear coherent states","authors":"E. Castro, E. Paez, C. Ladera, A. Zambrano","doi":"10.1117/12.2021611","DOIUrl":"https://doi.org/10.1117/12.2021611","url":null,"abstract":"Quantum teleportation has attracted much attention from both theorists and experimenters in the last decade. The emergence of new protocols and their actual implementation have even motivated the development of new quantum optical schemes. A key issue when teleporting a quantum state is establishing the quantum channel between sender and receiver stations, usually done by manipulating an auxiliary bipartite entangled state. The purpose of the present work is to study quantum teleportation processes in which that state is an entangled bipartite photon-added state, and the Adhikari et. al. continuous-variable quantum teleportation protocol is applied. Photon-added states can be generated using different experimental techniques, such as parametric down-conversion in a nonlinear crystal, and conditioned parametric amplification. These states are relevant because they exhibit generalized non-classical features for all orders of creation and annihilation operators, and may even show phase squeezing and sub-Poissonian distribution statistics. We study, the dependence of the fidelity of the teleported states and their photon number statistic as a function of the higher-order squeezing, and the higher-order sub-Poissonian statistic.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125215363","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

Band structure of a periodic waveguide that include a dispersive metamaterial 包含色散超材料的周期波导的频带结构

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2022016

A. Mendoza-Suárez, H. Pérez-Aguilar

引用次数: 1

Light pollution and solid-state lighting: reducing the carbon dioxide footprint is not enough 光污染和固态照明:减少二氧化碳足迹是不够的

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2025344

S. Bará

{"title":"Light pollution and solid-state lighting: reducing the carbon dioxide footprint is not enough","authors":"S. Bará","doi":"10.1117/12.2025344","DOIUrl":"https://doi.org/10.1117/12.2025344","url":null,"abstract":"Public and private lighting account for a relevant share of the overall electric power consumption worldwide. The pressing need of reducing the carbon dioxide emissions as well as of lowering the lumen•hour price tag has fostered the search for alternative lighting technologies to substitute for the incandescent and gas-discharge based lamps. The most successful approach to date, solid-state lighting, is already finding its way into the public lighting market, very often helped by substantial public investments and support. LED-based sources have distinct advantages: under controlled coditions their efficacy equals or surpasses that of conventional solutions, their small source size allows for an efficient collimation of the lightbeam (delivering the photons where they are actually needed and reducing lightspill on the surrounding areas), and they can be switched and/or dimmed on demand at very high rates, thus allowing for a taylored schedule of lighting. However, energy savings and carbon dioxide reduction are not the only crucial issues faced by present day lighting. A growing body of research has shown the significance of the spectral composition of light when it comes to assess the detrimental effects of artificial light-at-night (ALAN). The potential ALAN blueshift associated to the deployment of LED-based lighting systems has raised sensible concerns about its scientific, cultural, ecological and public health consequences, which can be further amplified if an increased light consumption is produced due to the rebound effect. This contribution addresses some of the challenges that these issues pose to the Optics and Photonics community.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126548342","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

Monitoring of non-homogeneous strains in wood glued joints with embedded FBG optical sensors in mode I delamination tests 用嵌入式FBG光学传感器监测木胶合接头在I型分层试验中的非均匀应变

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2031893

R. S. Maciel, O. Frazão, J. Morais, J. R. Fernandes

{"title":"Monitoring of non-homogeneous strains in wood glued joints with embedded FBG optical sensors in mode I delamination tests","authors":"R. S. Maciel, O. Frazão, J. Morais, J. R. Fernandes","doi":"10.1117/12.2031893","DOIUrl":"https://doi.org/10.1117/12.2031893","url":null,"abstract":"In this work it is presented a study of the reflection spectra yielded by a Fiber Bragg Grating sensor embedded into an epoxy glue line between two wood arms, in a double cantilever beam (DCB) Mode I delamination test. The reflection spectra were obtained using a Spectral Analyzer Fibersensing Bragmeter FS2200SA in regular time intervals, as the stress applied to the laminates is continuously increased until fracture occurs. They initially show a typical Bragg grating reflection spectrum, which gradually changes into more complicated, multiple-peak spectra, resulting from a non-homogenous strain distribution along the board line. Based on these results, a model was derived for the variation of the grating effective index which fits the observed spectra when the irregular strain distribution is observed. This model consists of usual cosine description of Bragg grating effective index with linear phase variation, plus a logarithmic phase change along the fiber length, resulting in the increment of the grating wavelength with increasing distance from the load application point. Moreover, from this model the strain distribution along the grating is found, yielding the expected result.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125666812","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

Accuracy of two osmometers on standard samples: electrical impedance technique and freezing point depression technique 两种渗透仪在标准样品上的精度:电阻抗技术和凝固点降低技术

Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications Pub Date : 2013-11-18 DOI: 10.1117/12.2030428

C. García-Resúa, Hugo Pena-Verdeal, M. Miñones, Jorge Gilino, M. .. Giraldez, E. Yebra-Pimentel

{"title":"Accuracy of two osmometers on standard samples: electrical impedance technique and freezing point depression technique","authors":"C. García-Resúa, Hugo Pena-Verdeal, M. Miñones, Jorge Gilino, M. .. Giraldez, E. Yebra-Pimentel","doi":"10.1117/12.2030428","DOIUrl":"https://doi.org/10.1117/12.2030428","url":null,"abstract":"High tear fluid osmolarity is a feature common to all types of dry eye. This study was designed to establish the accuracy of two osmometers, a freezing point depression osmometer (Fiske 110) and an electrical impedance osmometer (TearLab™) by using standard samples. To assess the accuracy of the measurements provided by the two instruments we used 5 solutions of known osmolarity/osmolality; 50, 290 and 850 mOsm/kg and 292 and 338 mOsm/L. Fiske 110 is designed to be used in samples of 20 μl, so measurements were made on 1:9, 1:4, 1:1 and 1:0 dilutions of the standards. Tear Lab is addressed to be used in tear film and only a sample of 0.05 μl is required, so no dilutions were employed. Due to the smaller measurement range of the TearLab, the 50 and 850 mOsm/kg standards were not included. 20 measurements per standard sample were used and differences with the reference value was analysed by one sample t-test. Fiske 110 showed that osmolarity measurements differed statistically from standard values except those recorded for 290 mOsm/kg standard diluted 1:1 (p = 0.309), the 292 mOsm/L H2O sample (1:1) and 338 mOsm/L H2O standard (1:4). The more diluted the sample, the higher the error rate. For the TearLab measurements, one-sample t-test indicated that all determinations differed from the theoretical values (p = 0.001), though differences were always small. For undiluted solutions, Fiske 110 shows similar performance than TearLab. However, for the diluted standards, Fiske 110 worsens.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129860626","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