Sensing Technologies + Applications最新文献_第6页

Near-infrared compressive line sensing imaging system using individually addressable laser diode array 采用可单独寻址激光二极管阵列的近红外压缩线传感成像系统

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2178804

B. Ouyang, W. Hou, F. Caimi, F. Dalgleish, A. Vuorenkoski, Sue Gong, W. Britton

引用次数: 3

Compressive sensing for a general SAR imaging model based on Maxwell’s equations 基于麦克斯韦方程的通用SAR成像模型压缩感知

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177845

Bing Sun, Haicheng Gu, Mengqi Hu, Z. Qiao

引用次数: 3

Sparsity-based moving target localization using multiple dual-frequency radars under phase errors 相位误差下基于稀疏性的多双频雷达运动目标定位

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177360

Khodour Al Kadry, F. Ahmad, M. Amin

引用次数: 1

Characterization of 3D printing output using an optical sensing system 使用光学传感系统表征3D打印输出

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177647

J. Straub

引用次数: 5

Experimental verification of reconstruction of two interfering wavefronts using the transport of intensity equation 利用强度输运方程重建两干涉波前的实验验证

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2176863

A. Darudi, Javad Amiri, Peyman Soltani, G. Nehmetallah

引用次数: 2

Thickness and air gap measurement of assembled IR objectives 组合红外物镜的厚度和气隙测量

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2182505

B. Lueerss, P. Langehanenberg

{"title":"Thickness and air gap measurement of assembled IR objectives","authors":"B. Lueerss, P. Langehanenberg","doi":"10.1117/12.2182505","DOIUrl":"https://doi.org/10.1117/12.2182505","url":null,"abstract":"A growing number of applications like surveillance, thermography, or automotive demand for infrared imaging systems. Their imaging performance is significantly influenced by the alignment of the individual lens elements. Besides the lateral orientation of lenses, the air spacing between the lenses is a crucial parameter. Because of restricted mechanical accessibility within an assembled objective, a non-contact technique is required for the testing of these parameters. So far commercial measurement systems were not available for testing of IR objectives since many materials used for infrared imaging are non-transparent at wavelengths below 2 μm. We herewith present a time-domain low coherent interferometer capable of measuring any kind of infrared material (e.g., Ge, Si, etc.) as well as VIS materials. The fiber-optic set-up is based on a Michelson-Interferometer in which the light from a broadband super-luminescent diode is split into a reference arm with a variable optical delay and a measurement arm where the sample is placed. On a photo detector, the reflected signals from both arms are superimposed and recorded as a function of the variable optical path. Whenever the group delay difference is zero, a coherence peak occurs and the relative lens’ surface distances are derived from the optical delay. In order to penetrate IR materials, the instrument operates at 2.2 μm. The set-up allows the contactless determination of thicknesses and air gaps inside of assembled infrared objective lenses with accuracy in the micron range. It therefore is a tool for the precise manufacturing or quality control.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125012707","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

Development of feature extraction analysis for a multi-functional optical profiling device applied to field engineering applications 应用于现场工程的多功能光学剖面装置特征提取分析的发展

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177281

Xu Han, Guangping Xie, Brandon Laflen, Ming Jia, G. Song, K. Harding

{"title":"Development of feature extraction analysis for a multi-functional optical profiling device applied to field engineering applications","authors":"Xu Han, Guangping Xie, Brandon Laflen, Ming Jia, G. Song, K. Harding","doi":"10.1117/12.2177281","DOIUrl":"https://doi.org/10.1117/12.2177281","url":null,"abstract":"In the real application environment of field engineering, a large variety of metrology tools are required by the technician to inspect part profile features. However, some of these tools are burdensome and only address a sole application or measurement. In other cases, standard tools lack the capability of accessing irregular profile features. Customers of field engineering want the next generation metrology devices to have the ability to replace the many current tools with one single device. This paper will describe a method based on the ring optical gage concept to the measurement of numerous kinds of profile features useful for the field technician. The ring optical system is composed of a collimated laser, a conical mirror and a CCD camera. To be useful for a wide range of applications, the ring optical system requires profile feature extraction algorithms and data manipulation directed toward real world applications in field operation. The paper will discuss such practical applications as measuring the non-ideal round hole with both off-centered and oblique axes. The algorithms needed to analyze other features such as measuring the width of gaps, radius of transition fillets, fall of step surfaces, and surface parallelism will also be discussed in this paper. With the assistance of image processing and geometric algorithms, these features can be extracted with a reasonable performance. Tailoring the feature extraction analysis to this specific gage offers the potential for a wider application base beyond simple inner diameter measurements. The paper will present experimental results that are compared with standard gages to prove the performance and feasibility of the analysis in real world field engineering. Potential accuracy improvement methods, a new dual ring design and future work will be discussed at the end of this paper.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124080180","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

Recent results in single-pixel compressive imaging using selective measurement strategies 使用选择性测量策略的单像素压缩成像的最新结果

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2180474

M. Herman, Tyler H. Weston, L. McMackin, Yun Li, Jianbo Chen, K. Kelly

{"title":"Recent results in single-pixel compressive imaging using selective measurement strategies","authors":"M. Herman, Tyler H. Weston, L. McMackin, Yun Li, Jianbo Chen, K. Kelly","doi":"10.1117/12.2180474","DOIUrl":"https://doi.org/10.1117/12.2180474","url":null,"abstract":"This paper reports an overview of recent results in compressive imaging and detection using a single-pixel camera. These applications use a digital micromirror device to spatially modulate the light from an observed scene using binary sensing patterns. The patterns are obtained from a special Hadamard matrix that contains blocks of rows of which each has a common local signature pattern. The blocks partition the Hadamard spectrum, thus permitting analysis of the scene in terms of these local signature patterns. In contrast, Hadamard patterns are typically described in terms of their sequency, which is a global property of each individual row. The proposed local-signature, row-block point of view can be beneficial since it permits us to adaptively select the best blocks with which to sense the signal/scene of interest, or to select the best blocks based on a priori information. As a result, in imaging applications more fine-scale detail can be extracted from the scene, and in detection applications fewer false positives can result. Note, this signature row-block partitioning is a general mathematical technique that can be applied to the Kronecker product of any two matrices, of any size. For example, in our imaging application, we extend this idea to a Hadamard matrix that is not a power of two, yet whose block-signatures possess the familiar Sylvester-Walsh power-of-two sequency patterns.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129245795","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

Terahertz reflection interferometry for automobile paint layer thickness measurement 太赫兹反射干涉法测量汽车漆层厚度

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2085418

Aunik K. Rahman, K. Tator, A. Rahman

{"title":"Terahertz reflection interferometry for automobile paint layer thickness measurement","authors":"Aunik K. Rahman, K. Tator, A. Rahman","doi":"10.1117/12.2085418","DOIUrl":"https://doi.org/10.1117/12.2085418","url":null,"abstract":"Non-destructive terahertz reflection interferometry offers many advantages for sub-surface inspection such as interrogation of hidden defects and measurement of layers’ thicknesses. Here, we describe a terahertz reflection interferometry (TRI) technique for non-contact measurement of paint panels where the paint is comprised of different layers of primer, basecoat, topcoat and clearcoat. Terahertz interferograms were generated by reflection from different layers of paints on a metallic substrate. These interferograms’ peak spacing arising from the delay-time response of respective layers, allow one to model the thicknesses of the constituent layers. Interferograms generated at different incident angles show that the interferograms are more pronounced at certain angles than others. This “optimum” angle is also a function of different paint and substrate combinations. An automated angular scanning algorithm helps visualizing the evolution of the interferograms as a function of incident angle and also enables the identification of optimum reflection angle for a given paint-substrate combination. Additionally, scanning at different points on a substrate reveals that there are observable variations from one point to another of the same sample over its entire surface area. This ability may be used as a quality control tool for in-situ inspection in a production line. Keywords: Terahertz reflective interferometry, Paint and coating layers, Non-destructive","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115272362","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

Compressive sensing for noisy video reconstruction 噪声视频重构中的压缩感知

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2180358

Huihuang Zhao, John Montalbo, Shuxia Li, Yaqi Sun, Z. Qiao

引用次数: 1