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Robust Bessel beam scanning without mechanical movement 无机械运动的鲁棒贝塞尔光束扫描
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2227768
M. Ventura, G. Tapang, C. Saloma
{"title":"Robust Bessel beam scanning without mechanical movement","authors":"M. Ventura, G. Tapang, C. Saloma","doi":"10.1117/12.2227768","DOIUrl":"https://doi.org/10.1117/12.2227768","url":null,"abstract":"Bessel beams are sensitive to tilt limiting its use in confocal scanning microscopy. We discuss a method for scanning a Bessel beam using a spatial light modulator (SLM) without the need for mechanical movement. Adding a grating phase to the SLM input produces robust point spread functions across the imaging plane that deviate less than 1.5% away from unity in terms of its normalized fidelity.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123985929","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
Efficient detection and recognition algorithm of reference points in photogrammetry 摄影测量中参考点的高效检测与识别算法
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2225416
Weimin Li, Gang Liu, Lichun Zhu, Xiaofeng Li, Yuhai Zhang, Siyu Shan
{"title":"Efficient detection and recognition algorithm of reference points in photogrammetry","authors":"Weimin Li, Gang Liu, Lichun Zhu, Xiaofeng Li, Yuhai Zhang, Siyu Shan","doi":"10.1117/12.2225416","DOIUrl":"https://doi.org/10.1117/12.2225416","url":null,"abstract":"In photogrammetry, an approach of automatic detection and recognition on reference points have been proposed to meet the requirements on detection and matching of reference points. The reference points used here are the CCT(circular coded target), which compose of two parts: the round target point in central region and the circular encoding band in surrounding region. Firstly, the contours of image are extracted, after that noises and disturbances of the image are filtered out by means of a series of criteria, such as the area of the contours, the correlation coefficient between two regions of contours etc. Secondly, the cubic spline interpolation is adopted to process the central contour region of the CCT. The contours of the interpolated image are extracted again, then the least square ellipse fitting is performed to calculate the center coordinates of the CCT. Finally, the encoded value is obtained by the angle information from the circular encoding band of the CCT. From the experiment results, the location precision of the CCT can be achieved to sub-pixel level of the algorithm presented. Meanwhile the recognition accuracy is pretty high, even if the background of the image is complex and full of disturbances. In addition, the property of the algorithm is robust. Furthermore, the runtime of the algorithm is fast.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116407749","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
High resolution spectroscopic mapping imaging applied in situ to multilayer structures for stratigraphic identification of painted art objects 多层结构的原位高分辨率光谱成像在绘画艺术品地层识别中的应用
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2227943
G. Karagiannis
{"title":"High resolution spectroscopic mapping imaging applied in situ to multilayer structures for stratigraphic identification of painted art objects","authors":"G. Karagiannis","doi":"10.1117/12.2227943","DOIUrl":"https://doi.org/10.1117/12.2227943","url":null,"abstract":"The development of non–destructive techniques is a reality in the field of conservation science. These techniques are usually not so accurate, as the analytical micro–sampling techniques, however, the proper development of soft–computing techniques can improve their accuracy. In this work, we propose a real–time fast acquisition spectroscopic mapping imaging system that operates from the ultraviolet to mid infrared (UV/Vis/nIR/mIR) area of the electromagnetic spectrum and it is supported by a set of soft–computing methods to identify the materials that exist in a stratigraphic structure of paint layers. Particularly, the system acquires spectra in diffuse–reflectance mode, scanning in a Region-Of-Interest (ROI), and having wavelength range from 200 up to 5000 nm. Also, a fuzzy c–means clustering algorithm, i.e., the particular soft–computing algorithm, produces the mapping images. The evaluation of the method was tested on a byzantine painted icon.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124830034","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
Short review of polarimetric imaging based method for 3D measurements 基于偏振成像的三维测量方法综述
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2229931
C. Stolz, A. Zanzouri Kechiche, O. Aubreton
{"title":"Short review of polarimetric imaging based method for 3D measurements","authors":"C. Stolz, A. Zanzouri Kechiche, O. Aubreton","doi":"10.1117/12.2229931","DOIUrl":"https://doi.org/10.1117/12.2229931","url":null,"abstract":"In the domain of 3D measurement for inspection purposes, standard systems based on triangulation approaches, can be limited by the nature of the observed surface. When the surface is not lambertian, i.e. highly reflective or transparent, other strategies to ease the measurement need to be developed. The idea of using the polarization property of the light is one of them. This was explored to be a complementary modality, in triangulation or shape from distortion methods, or used in a standalone system through the concept of \"shape from polarization\". In this paper we propose a short state of the art of the usage of polarimetric imaging for the study of surface and the measurement of 3D data. We focus on recent development applied to the industrial domain, or the health domain.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126050319","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: 6
Image quality metrics applied to digital pathology 应用于数字病理学的图像质量指标
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2230655
A. Jiménez, G. Bueno, G. Cristóbal, O. Deniz, David Toomey, C. Conway
{"title":"Image quality metrics applied to digital pathology","authors":"A. Jiménez, G. Bueno, G. Cristóbal, O. Deniz, David Toomey, C. Conway","doi":"10.1117/12.2230655","DOIUrl":"https://doi.org/10.1117/12.2230655","url":null,"abstract":"Several full-reference and blind metrics from literature have been tested on a set of digitized pathology slides under different known distortion conditions. Those ones showing the most uniform behavior are presented in this paper. Also, an algorithm that provides a blur map of the whole slide images (WSIs) has been implemented based on one of such methods.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125058155","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: 9
Compact narrow linewidth diode laser modules for precision quantum optics experiments on board of sounding rockets 用于探空火箭机载精密量子光学实验的紧凑窄线宽二极管激光器模块
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2231537
A. Kohfeldt, C. Kürbis, E. Luvsandamdin, M. Schiemangk, A. Wicht, A. Peters, G. Erbert, G. Tränkle
{"title":"Compact narrow linewidth diode laser modules for precision quantum optics experiments on board of sounding rockets","authors":"A. Kohfeldt, C. Kürbis, E. Luvsandamdin, M. Schiemangk, A. Wicht, A. Peters, G. Erbert, G. Tränkle","doi":"10.1117/12.2231537","DOIUrl":"https://doi.org/10.1117/12.2231537","url":null,"abstract":"We have realized a laser platform based on GaAs diode lasers that allows for an operation in mobile exper-imental setups in harsh environments, such as on sounding rockets. The platform comes in two versions: a master-oscillator-power-amplifier and an extended cavity diode laser. Our very robust micro-optical bench has a footprint of 80 x 25 mm2. It strictly omits any movable parts. Master-oscillator-power-amplifier systems based on distributed feedback master oscillators for 767 nm and 780 nm narrow linewidth emission have been implemented by now. A continuous wave optical output power of > 1 W with a power conversion efficiency of > 25% could be achieved. The continuous tuning range of these lasers is on the order of 100 GHz, the linewidth at 10 μs is about 1 MHz. For applications demanding a narrower linewidth we have developed an extended cavity diode laser that achieves a linewidth of 100 kHz at 10 μs. These lasers achieve a continuous spectral tuning range of about 50 GHz and an continuous wave optical power up to 30 mW. The modules have been successfully vibration tested up to 29 gRMS along all three axes and passed 1500 g shocks, again along all 3 axes. Both, master-oscillator-power-amplifiers and extended cavity diode lasers, have been employed in sounding rocket experiments.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127237555","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: 8
Towards rotation sensing with a single atomic clock 朝着用单个原子钟进行旋转传感的方向发展
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2229878
T. Fernholz, R. Stevenson, M. Hush, I. Lesanovsky, T. Bishop, Fabio Gentile, S. Jammi, T. Pyragius, M. Bason, H. Mas, S. Pandey, G. Vasilakis, K. Poulios, W. von Klitzing
{"title":"Towards rotation sensing with a single atomic clock","authors":"T. Fernholz, R. Stevenson, M. Hush, I. Lesanovsky, T. Bishop, Fabio Gentile, S. Jammi, T. Pyragius, M. Bason, H. Mas, S. Pandey, G. Vasilakis, K. Poulios, W. von Klitzing","doi":"10.1117/12.2229878","DOIUrl":"https://doi.org/10.1117/12.2229878","url":null,"abstract":"We discuss a scheme to implement a gyroscopic atom sensor with magnetically trapped ultra-cold atoms. Unlike standard light or matter wave Sagnac interferometers no free wave propagation is used. Interferometer operation is controlled only with static, radio-frequency and microwave magnetic fields, which removes the need for interferometric stability of optical laser beams. Due to the confinement of atoms, the scheme may allow the construction of small scale portable sensors. We discuss the main elements of the scheme and report on recent results and efforts towards its experimental realization.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121949885","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
Modeling cavities exhibiting strong lateral confinement using open geometry Fourier modal method 利用开放几何傅里叶模态方法模拟具有强侧向约束的空腔
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2227117
T. Häyrynen, N. Gregersen
{"title":"Modeling cavities exhibiting strong lateral confinement using open geometry Fourier modal method","authors":"T. Häyrynen, N. Gregersen","doi":"10.1117/12.2227117","DOIUrl":"https://doi.org/10.1117/12.2227117","url":null,"abstract":"We have developed a computationally efficient Fourier-Bessel expansion based open geometry formalism for modeling the optical properties of rotationally symmetric photonic nanostructures. The lateral computation domain is assumed infinite so that no artificial boundary conditions are needed. Instead, the leakage of the modes due to an imperfect field confinement is taken into account by using a basis functions that expand the whole infinite space. The computational efficiency is obtained by using a non-uniform discretization in the frequency space in which the lateral expansion modes are more densely sampled around a geometry specific dominant transverse wavenumber region. We will use the developed approach to investigate the Q factor and mode confinement in cavities where top DBR mirror has small rectangular defect confining the modes laterally on the defect region.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121861019","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
Initialization and measurement of nitrogen-vacancy centers in diamond with plasmonic Purcell enhancement 等离子体珀塞尔增强金刚石中氮空位中心的初始化和测量
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2228457
S. Wolf, I. Rosenberg, R. Rapaport, N. Bar-Gill
{"title":"Initialization and measurement of nitrogen-vacancy centers in diamond with plasmonic Purcell enhancement","authors":"S. Wolf, I. Rosenberg, R. Rapaport, N. Bar-Gill","doi":"10.1117/12.2228457","DOIUrl":"https://doi.org/10.1117/12.2228457","url":null,"abstract":"Nitrogen-Vacancy (NV) color centers in diamond have emerged as promising quantum solid-state systems, with applications ranging from quantum information processing to magnetic sensing. One of the most useful properties of NVs is the ability to read their ground-state spin projection optically at room temperature. In this work we consider the effect of the Purcell enhancement on the ability to initialize the NV state and analyze the effect to imperfect initialization on the measurement SNR. We demonstrate that even with feasible initial conditions the combined increase in spontaneous emission (through Purcell enhancement) and in optical excitation could significantly increase the readout SNR.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131134615","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
Free-space single-photon transistor based on Rydberg interaction 基于里德伯相互作用的自由空间单光子晶体管
SPIE Photonics Europe Pub Date : 2016-04-29 DOI: 10.1117/12.2227393
A. Paris-Mandoki, H. Gorniaczyk, C. Tresp, I. Mirgorodskiy, C. Zimmer, S. Hofferberth
{"title":"Free-space single-photon transistor based on Rydberg interaction","authors":"A. Paris-Mandoki, H. Gorniaczyk, C. Tresp, I. Mirgorodskiy, C. Zimmer, S. Hofferberth","doi":"10.1117/12.2227393","DOIUrl":"https://doi.org/10.1117/12.2227393","url":null,"abstract":"An all-optical transistor working on the single-photon level is implemented using an ultracold atomic cloud as a medium. The interaction mechanism between gate and source photons is achieved by mapping these photons onto strongly interacting Rydberg excitations. Using a single gate photon more than 100 source photons can be switched. As an application of this transistor, we demonstrate nondestructive detection of a single Rydberg atom with a fidelity of 0.79.","PeriodicalId":285152,"journal":{"name":"SPIE Photonics Europe","volume":"338 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114235581","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
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