Journal of the European Optical Society-Rapid Publications最新文献

{"title":"Modelling and simulation of mid-spatial-frequency error generation in CCOS","authors":"Bo Zhong,&nbsp;Hongzhong Huang,&nbsp;Xianhua Chen,&nbsp;Wenhui Deng,&nbsp;Jian Wang","doi":"10.1186/s41476-018-0075-y","DOIUrl":"https://doi.org/10.1186/s41476-018-0075-y","url":null,"abstract":"<p>The computer-controlled optical surfacing (CCOS) technology, which has advantages of high certainty and high convergence rate for surface error correction, has been widely applied in the manufacture of large-aperture optical elements. However, due to the convolution effect, the mid-spatial-frequency (MSF) errors are difficult to be restrained in CCOS.</p><p>Consequently, this paper presents a theoretical and experimental investigation on the generation of MSF errors, aiming to reveal its main influencing factors, and figure out the optimized parameters and the controlling strategies for restraining MSF errors. A surface topography simulation model for the generation of MSF errors was established first. Based on which, orthogonal simulation experiments were designed and conducted for the following three parameters, i.e., tool influence function (TIF), path type, and path spacing. Subsequently, the proposed model was verified through the practical polishing experiments.</p><p>The results demonstrated the influencing degree of the parameters and the optimized combination of parameters, and provided process guidance for restraining MSF errors in CCOS.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"14 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-018-0075-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4607836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene","authors":"Boniphace Kanyathare,&nbsp;Kalle Kuivalainen,&nbsp;Jukka Räty,&nbsp;Pertti Silfsten,&nbsp;Prince Bawuah,&nbsp;Kai-Erik Peiponen","doi":"10.1186/s41476-018-0071-2","DOIUrl":"https://doi.org/10.1186/s41476-018-0071-2","url":null,"abstract":"<p>Liquid fuel adulteration has several far-reaching impacts such as environmental pollution. A widespread practice is typically the adulteration of diesel oil by kerosene. The relatively cheap price of kerosene is probably the most important reason for its usage in illegal adulteration. Herein, we demonstrate the use of a prototype optical sensor for efficient tracking of adulterated diesel oil.</p><p>In this study, a prototype of an optical sensor for screening of fake diesel oil is proposed. The device exploits the phenomenon of laser light reflection from a fuel film over a roughened glass plate. The sensing mechanism of the devise is based on the refractive index mismatch between the glass and the fuel sample, and the wetting property of the fuel film over the roughened surface. For the sake of comparison, the refractive index for each of the fuel samples was measured at room temperature with the aid of an automatic temperature controlled Abbe table refractometer. The sensitivity of this prototype optical sensor was tested using training sets of diesel oil samples adulterated with low concentrations of kerosene.</p><p>Originally, a commercial handheld glossmeter, with a new innovation of a removable sensor head for liquid inspection is presented as a prototype sensor for the screening of possible adulteration of diesel oils with kerosene. The significant difference in the signal readings obtained from carefully prepared training sets of adulterated diesel oil composed of low percentages (5–15%) of kerosene has proven the high sensitivity of the developed sensor.</p><p>The ability to detect low concentrations of kerosene in diesel using the newly developed hand-held prototype sensor proves its high sensitivity compared to a high-accuracy Abbe refractometer. We envisage that this proposed sensor could, in the future, be made accessible to the authorities as a mobile fake fuel measurement unit<b>.</b></p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"14 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-018-0071-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4716516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frequency-division-multiplexing based period-coded fringe pattern for reliable depth sensing","authors":"Lili Yang,&nbsp;Fu Li,&nbsp;Guangming Shi,&nbsp;Ruodai Li,&nbsp;Yi Niu,&nbsp;Zhefeng Gao,&nbsp;Pingfang Dou","doi":"10.1186/s41476-017-0070-8","DOIUrl":"https://doi.org/10.1186/s41476-017-0070-8","url":null,"abstract":"<p>The fringe pattern can realize high-resolution and dense depth sensing. However, the phase ambiguity is a challenge in the fringe pattern. In this paper, one period-code pattern is embedded to the fringe pattern by the frequency-division-multiplexing (FDM) framework. The nonparametric skew and De Bruijn sequence are utilized to determine the label of the period. For a more reliable phase unwrapping, three criteria are utilized to rectify the period numbers further. Quantitative and qualitative experiments show that the proposed method can achieve more reliable depth sensing compared with the counterparts. Even the measured scene contains discontinuous surfaces or sharp edges, the proposed algorithm can attain reliable depth.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"14 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0070-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4341117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel accuracy test for multispectral imaging systems based on ΔE measurements","authors":"Marcel Dierl,&nbsp;Timo Eckhard,&nbsp;Bernhard Frei,&nbsp;Maximilian Klammer,&nbsp;Sascha Eichstädt,&nbsp;Clemens Elster","doi":"10.1186/s41476-017-0069-1","DOIUrl":"https://doi.org/10.1186/s41476-017-0069-1","url":null,"abstract":"<p>In the printing industry, multispectral line scan cameras are being applied with increasing frequency in print inspection. This field of application requires highly accurate camera systems. In this article, we describe a novel approach to determining the accuracy of multispectral measurements recorded by line scan cameras. The approach is based on Bayesian statistics and paves the way for inline applications. Our approach uses the distribution of color distances, as expressed by <i>Δ</i>\u0000 <i>E</i> values, that arise when the reference color spectra of a color chart are compared with corresponding spectra reconstructed from the measured camera responses of observed color patches. By means of 18 <i>Δ</i>\u0000 <i>E</i> values originating from a color control strip, our approach provides an accuracy evaluation of multispectral imaging systems with line scan technology. To demonstrate this, four scenarios are considered in which the multispectral imaging system is used with different measurement accuracies. It is shown that the imaging system in these cases can be reliably characterized with respect to the quality of the multispectral measurements.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"14 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0069-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4081293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative coating thickness determination using a coefficient-independent hyperspectral scattering model","authors":"Liesbeth M. Dingemans,&nbsp;Vassilis M. Papadakis,&nbsp;Ping Liu,&nbsp;Aurèle J. L. Adam,&nbsp;Roger M. Groves","doi":"10.1186/s41476-017-0068-2","DOIUrl":"https://doi.org/10.1186/s41476-017-0068-2","url":null,"abstract":"<p>Hyperspectral imaging is a technique that enables the mapping of spectral signatures across a surface. It is most commonly used for surface chemical mapping in fields as diverse as satellite remote sensing, biomedical imaging and heritage science. Existing models, such as the Kubelka-Munk theory and the Lambert-Beer law also relate layer thickness with absorption, and in the case of the Kubelka-Munk theory scattering, however they are not able to fully describe the complex behavior of the light-layer interaction.</p><p>This paper describes a new approach for hyperspectral imaging, the mapping of coating surface thickness using a coefficient-independent scattering model. The approach taken in this paper is to model the absorption and scattering behavior using a developed coefficient-independent model, calibrated using reference sample thickness measurements performed with optical coherence tomography.</p><p>The results show that this new model, by considering the spectral variation that can be recorded by the hyperspectral imaging camera, is able to measure coatings of 250 μm thickness with an accuracy of 11 μm in a fast and repeatable way.</p><p>The new coefficient-independent scattering model presented can successfully measure the thickness of coatings from hyperspectral imaging data.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"13 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0068-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4783001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Focal plane model for flat refractive geometry","authors":"Garrett W. Mann,&nbsp;Steven J. Eckels","doi":"10.1186/s41476-017-0067-3","DOIUrl":"https://doi.org/10.1186/s41476-017-0067-3","url":null,"abstract":"<p>Flow visualization techniques such as uPIV and droplet imaging determine the measurement volume by the focal plane. Thus, an understanding of how the focal plane moves in reference to the camera is necessary when planar interfaces are present between the camera and the focal plane.</p><p>Using geometric optics, a focus model for a camera imaging through multiple parallel interfaces with different refractive indices is derived. This model is based on the thin lens camera model and gives the location of the focal plane, the depth of field, and the change in the location of the focal plane for a change of camera position. The theoretical model is validated by both simulation and experimental results.</p><p>Significant results are that while the magnification of a camera for an in-focus object does not vary for changes in the camera position, the position of the focal plane does. The change of the focal plane location depends only on the refractive indices of the media surrounding the camera and the focal plane regardless of the number or type of other media in between.</p><p>The derived model provides a simple, accurate relationship between the focal plane location and the number and location of planar interfaces, thus avoiding potentially incorrect results for measurement plane depth.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"13 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2017-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0067-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4488843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental identification of unique angular dependent scattering behavior of nanoparticles","authors":"Guanchao Yin,&nbsp;Min Song,&nbsp;Waseem Raja,&nbsp;Patrick Andrae,&nbsp;Martina Schmid","doi":"10.1186/s41476-017-0066-4","DOIUrl":"https://doi.org/10.1186/s41476-017-0066-4","url":null,"abstract":"<p>Nanoparticles exhibit unique light scattering properties and are applied in many research fields.</p><p>In this work, we perform angular resolved scattering measurements to study the scattering behaviour of random and periodic silver (Ag), and periodic polystyrene (PS) nanoparticles.</p><p>The random Ag nanoparticles, with a wide particle size distribution, are able to broadbandly scatter light into large angles. In contrast, both types of periodic nanoparticles are characterized by a strong scattering zone where scattering angles are increasing as the wavelength increases.</p><p>Angular resolved scattering measurements enable experimentally revealing the particular scattering properties of different nanostructures.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"13 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2017-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0066-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4877736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modal properties of a strip-loaded horizontal slot waveguide","authors":"Ségolène Pélisset,&nbsp;Janne Laukkanen,&nbsp;Markku Kuittinen,&nbsp;Seppo Honkanen,&nbsp;Matthieu Roussey","doi":"10.1186/s41476-017-0065-5","DOIUrl":"https://doi.org/10.1186/s41476-017-0065-5","url":null,"abstract":"<p>Channel waveguides have been developed for years to comply with the need for smaller footprint and better integration in photonics circuits. However, they are still suffering from fabrication complexity and optical losses. These two limitations can be addressed by combining two types of channel waveguides, namely strip-loaded and slot waveguide.</p><p>We present a systematic study of the geometrical parameters of a strip-loaded horizontal slot waveguide and their influence on the characteristics of the device. Simulations and experiments are carried out to understand the behavior of the electromagnetic field inside such a waveguide. In particular, the influence of the high and low refractive index layers and the loading-strip on the key characteristics of the structure, i.e., the confinement factor and the effective index, are investigated theoretically and compared with experimental values.</p><p>The main properties of this waveguide platform are a low lateral index contrast, a high vertical field confinement, and low-propagation losses (1.4 dB/cm).</p><p>Our results show that this platform is highly versatile, easy to fabricate and low-losses. We also show that the geometry of the mode can be tuned to suit the application.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"13 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2017-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0065-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4839779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dimensionality of random light fields","authors":"Andreas Norrman,&nbsp;Ari T. Friberg,&nbsp;José J. Gil,&nbsp;Tero Setälä","doi":"10.1186/s41476-017-0061-9","DOIUrl":"https://doi.org/10.1186/s41476-017-0061-9","url":null,"abstract":"<p>The spectral polarization state and dimensionality of random light are important concepts in modern optical physics and photonics.</p><p>By use of space-frequency domain coherence theory, we establish a rigorous classification for the electricfield vector to oscillate in one, two, or three spatial dimensions.</p><p>We also introduce a new measure, the polarimetric dimension, to quantify the dimensional character of light. The formalism is utilized to show that polarized three-dimensional light does not exist, while an evanescent wave generated in total internal reflection generally is a genuine three-dimensional light field.</p><p>The framework we construct advances the polarization theory of random light and it could be beneficial for near-field optics and polarization-sensitive applications involving complex-structured light fields.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"13 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2017-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0061-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4696912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on modified selected mapping technique for PAPR reduction and reception performance improvement in 8QAM-OFDM optical access systems","authors":"Yufeng Shao,&nbsp;Wenzhe Ma","doi":"10.1186/s41476-017-0064-6","DOIUrl":"https://doi.org/10.1186/s41476-017-0064-6","url":null,"abstract":"<p>Orthogonal frequency division multiplexing has been regarded as one of the promising technologies for the optical access systems application. However, high peak-to-average power ratio will cause the signal distortion and enable the used amplifier to operate in nonlinear section.</p><p>In this paper, a modified selected mapping technique is introduced for reducing the peak-to-average power ratio and enhancing reception performance of the downstream 8QAM-OFDM signals in optical access systems.</p><p>Compared with the traditional selected mapping technique, the PAPR value of 8QAM-OFDM optical downstream signals with 128 subcarriers is reduced by almost 2 dB using modified SLM when the complementary cumulative distribution function probability value is 10?2. Moreover, the bit error rate performance will be improved, while 10Gbit/s 8QAM-OFDM optical downlink signals are transmitted over single mode fiber with different access length.</p><p>Hence, the proposed scheme becomes more efficient for the future optical orthogonal frequency division multiplexing access systems.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"13 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2017-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-017-0064-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4657546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}