The International Commission for Optics最新文献_第7页

Optical granulometry by digital image processing 数字图像处理光学粒度测定

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902633

A. Montenegro, Yuri Nahmad Molinari, D. Sarocchi, R. Bartali, L. A. Rodríguez

{"title":"Optical granulometry by digital image processing","authors":"A. Montenegro, Yuri Nahmad Molinari, D. Sarocchi, R. Bartali, L. A. Rodríguez","doi":"10.1117/12.902633","DOIUrl":"https://doi.org/10.1117/12.902633","url":null,"abstract":"For several decades the field of engineering geology, has had several difficulties to characterize properties of sedimentary particles. These particles are characterized by a multitude of sizes and shapes. For measuring the sizes there are a number of instruments based on different principles. However, the use of these instruments is not very widespread. The size of sediment particles covers several orders of magnitude therefore, the instruments have been developed do not meet all requirements. Several authors have demonstrated the feasibility to perform these tests by means of digital image processing. In this paper we propose to obtain optical particle size, morphological analysis and density, in a range of 30 microns to 50 mm. To this end we propose two assemblies that cover the range of sizes. In the proposed assembly is used as transport fluid particles. The fluid and allow a mechanism to disperse the sample, this solves the problem of segmentation in digital image processing. It uses a back-illuminated light for accurate measurement of particles due to the complexity of its component phases. By digital image processing can be 41 measurements on each particle. Furthermore allows morphological analysis using the Fourier method. A tracking algorithm to determine the density of the particles according to Stokes' law. Experiments demonstrate the accuracy and repeatability of this method compared with other methods of measurement.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"1 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":"128215876","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

Numerical reconstruction of spectral reflectance curves of oil painting on canvas 油画在画布上的光谱反射曲线的数值重建

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903317

L. G. Valdivieso, C. A. Osorio, J. Guerrero

{"title":"Numerical reconstruction of spectral reflectance curves of oil painting on canvas","authors":"L. G. Valdivieso, C. A. Osorio, J. Guerrero","doi":"10.1117/12.903317","DOIUrl":"https://doi.org/10.1117/12.903317","url":null,"abstract":"Unlike the color -which is a quality without physical meaning and that involves subjective estimation of interaction of electromagnetic radiation with surfaces- spectral reflectance is a physical property that characterizes different materials, no matter what chromatic content of illuminant and the spectral response of the sensor. This means that the spectral reflectance is a magnitude of particular interes in both reconstruction and reproduction in digital color systems. In this paper, two approaches to the numerical reconstruction of spectral reflectance curves of samples of oil painting on canvas, are presented. These approaches need a set of spectral reflectance curves, given by a spectrophotometer, and their respective sampling using color filters placed in front of a monochrome CCD camera. The first approach is based on the interpolation of the camera response to each color filter. The second one, relies in obtain a vectorial base and appropiate coefficients to reconstruct the spectral reflectance curve. Goodness of fit coefficient (GFC) and absolute mean error (ABE) are the metrics used to evaluate the performance of the proposed procedures.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"9 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":"128269709","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

High-density optical disks for long-term information storage 用于长期存储信息的高密度光盘

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.900745

V. Petrov, A. Kryuchyn, I. Gorbov

{"title":"High-density optical disks for long-term information storage","authors":"V. Petrov, A. Kryuchyn, I. Gorbov","doi":"10.1117/12.900745","DOIUrl":"https://doi.org/10.1117/12.900745","url":null,"abstract":"Optical discs are widely used for storage of archival data represented in a digital form. Long-term storage of information recorded on standard CDs is provided by periodical rewriting (once in 3-5 years) on the new carriers. High-stable lightsensitive materials and special reflective metal coatings are proposed to use for increasing the information storage terms of the optical discs. The conducted researches have showed that the application of vitreous chalcogenide semiconductors in optical WORM discs assures the data storage terms up to 30 years. Substantially larger terms of data storage can be realized on the optical ROM carriers. Attainment of the guaranteed data storage terms within several hundreds years is provided in such carriers by applying high-stable materials substrates and information should be represented in the form of a micro-relief structure on the substrate surface. Sapphire, quartz, silicon, glass-ceramics and other materials can be utilized for manufacturing substrates of optical BD discs (and other subsequent high-density disc formats). These materials allow creating substrates characterized with increased melting temperature, chemical and mechanical resistance. Furthermore, using the mentioned materials for substrates production permits applying high temperature materials, such as chrome and nickel, to creation of high-stable refractive layers and demonstrating the sufficient mechanical adhesion between the refractive layer and the substrate. Modern methods of thermo-lithography offers creating of nano-size images on photo-resist layer deposited on the substrates. Those images can be transformed to the nano-size relief structures on the surface of the high-stable materials substrates by techniques of reactive ion-beam etching.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"16 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":"128358155","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: 7

Optical pressure sensor based on the combined system of a variable liquid lens and a point diffraction interferometer 基于可变液体透镜与点衍射干涉仪组合系统的光学压力传感器

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903387

A. García‐Arellano, Manuel Gómez-García, E. Acosta

引用次数: 0

Optical properties of fullerenes confined in ordered alumina nanotube arrays 富勒烯在有序氧化铝纳米管阵列中的光学性质

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903394

F. G. Ontiveros-Barrera, O. Morales–Saavedra, M. E. Mata-Zamora, J. Bañuelos, A. Rodríguez-Rosales, E. Álvarez-Zauco

引用次数: 0

Mie scattering of light with orbital angular momentum by nanoparticles 纳米粒子轨道角动量光的Mie散射

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903437

P. Acharya, Á. Guzmán

引用次数: 2

Photonic second-order duty-cycle modulator 光子二阶占空比调制器

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.903286

P. Costanzo‐Caso, E. Reeves, Yiye Jin, S. Granieri, A. Siahmakoun

引用次数: 4

Low-cost and biocompatible long-period fiber gratings 低成本和生物相容性的长周期光纤光栅

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902143

J. Soto-Olmos, L. Oropeza-Ramos, J. Hernández-Cordero

{"title":"Low-cost and biocompatible long-period fiber gratings","authors":"J. Soto-Olmos, L. Oropeza-Ramos, J. Hernández-Cordero","doi":"10.1117/12.902143","DOIUrl":"https://doi.org/10.1117/12.902143","url":null,"abstract":"In this paper, a low-cost long-period fiber grating (LPFG) induced by a polymeric microstructure is demonstrated. LPFGs are induced on a tapered optical fiber (TOF) when a periodic micro-grating comes into contact with the thin region of the fiber. The micro-grating device is made using polydimethylsiloxane (PDMS), an inexpensive, nontoxic and optically transparent polymer that is extensively used in microfluidics, organic electronics and biotechnological applications. Soft lithography, along with molds built from thermoplastic polystyrene sheets, makes the fabrication straightforward and extremely low-cost. Additionally, no precision machining is necessary and the resolution of the microstructures is limited only by the resolution of the laser printer used for patterning the polystyrene sheets. The TOF and the micro-grating were dimensionally characterized using optical microscopy and white light interferometry, respectively. Variations on the optical spectrum due to pressure and temperature were observed and their magnitudes were similar to those obtained using metallic microstructures. Thus, LPFGs can be made in an inexpensive and expeditious way using PDMS and TOFs. These polymeric devices can be integrated into microfluidic and other labon- a-chip systems where biocompatibility is a valuable characteristic.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"11 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":"127560526","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 spectroscopy as a monitor of thin film growth in sputtering 光谱学作为溅射过程中薄膜生长的监测

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902029

N. Abundiz, A. Pérez, V. Garcia, R. Machorro

引用次数: 0

Optical and mechanical nondestructive tests for measuring tomato fruit firmness 番茄果实硬度测定的光学和机械无损试验

The International Commission for Optics Pub Date : 2011-08-15 DOI: 10.1117/12.902157

Ricardo A. Manivel-Chávez, M. G. Garnica-Romo, G. Arroyo-Correa, J. I. Aranda-Sanchez

引用次数: 0