SPIE Commercial + Scientific Sensing and Imaging最新文献_第6页

Characterization of internal geometry / covered surface defects with a visible light sensing system 用可见光传感系统表征内部几何形状/覆盖表面缺陷

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-31 DOI: 10.1117/12.2227802

J. Straub

引用次数: 5

Best practices in passive remote sensing VNIR hyperspectral system hardware calibrations 被动遥感VNIR高光谱系统硬件标定的最佳实践

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-27 DOI: 10.1117/12.2224022

J. Jablonski, C. Durell, Terrence Slonecker, Kwok-Keung Wong, Blair Simon, A. Eichelberger, Jacob Osterberg

引用次数: 7

Novel high performance multispectral photodetector and its performance 新型高性能多光谱光电探测器及其性能研究

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2230574

Genki Mizuno, J. Dutta, Patrick Oduor, A. Dutta, N. Dhar

引用次数: 5

Visualization of coke state in hydraulic decoking process 水力脱焦过程中焦炭状态的可视化

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2223687

Qian Guo, X. Tong, Chengwei Deng, Cui Zhang, Di Huang, Liang Chen, Jiaguo Xiong

引用次数: 0

Overview of detector technologies for EO/IR sensing applications EO/IR传感应用的探测器技术概述

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2229420

A. Sood, J. Zeller, R. Welser, Y. Puri, Jay S. Lewis, N. Dhar, P. Wijewarnasuriya

{"title":"Overview of detector technologies for EO/IR sensing applications","authors":"A. Sood, J. Zeller, R. Welser, Y. Puri, Jay S. Lewis, N. Dhar, P. Wijewarnasuriya","doi":"10.1117/12.2229420","DOIUrl":"https://doi.org/10.1117/12.2229420","url":null,"abstract":"Optical sensing technology is critical for optical communication, defense and security applications. Advances in optoelectronics materials in the UV, Visible and Infrared, using nanostructures, and use of novel materials such as CNT and Graphene have opened doors for new approaches to apply device design methodology that are expected to offer enhanced performance and low cost optical sensors in a wide range of applications. This paper is intended to review recent advancements and present different device architectures and analysis. The chapter will briefly introduce the basics of UV and Infrared detection physics and various wave bands of interest and their characteristics [1, 2] We will cover the UV band (200-400 nm) and address some of the recent advances in nanostructures growth and characterization using ZnO/MgZnO based technologies and their applications. Recent advancements in design and development of CNT and Graphene based detection technologies have shown promise for optical sensor applications. We will present theoretical and experimental results on these device and their potential applications in various bands of interest.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125309301","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

Remote application for spectral collection 光谱采集的远程应用

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2224513

Shelli R. Cone, R. Steele, Nigel H. Tzeng, Alexer H. Firpi, Benjamin M. Rodriguez

{"title":"Remote application for spectral collection","authors":"Shelli R. Cone, R. Steele, Nigel H. Tzeng, Alexer H. Firpi, Benjamin M. Rodriguez","doi":"10.1117/12.2224513","DOIUrl":"https://doi.org/10.1117/12.2224513","url":null,"abstract":"In the area of collecting field spectral data using a spectrometer, it is common to have the instrument over the material of interest. In certain instances it is beneficial to have the ability to remotely control the spectrometer. While several systems have the ability to use a form of connectivity to capture the measurement it is essential to have the ability to control the settings. Additionally, capturing reference information (metadata) about the setup, system configuration, collection, location, atmospheric conditions, and sample information is necessary for future analysis leading towards material discrimination and identification. This has the potential to lead to cumbersome field collection and a lack of necessary information for post processing and analysis. The method presented in this paper describes a capability to merge all parts of spectral collection from logging reference information to initial analysis as well as importing information into a web-hosted spectral database. This allows the simplification of collecting, processing, analyzing and storing field spectra for future analysis and comparisons. This concept is developed for field collection of thermal data using the Designs and Prototypes (D&P) Hand Portable FT-IR Spectrometer (Model 102). The remote control of the spectrometer is done with a customized Android application allowing the ability to capture reference information, process the collected data from radiance to emissivity using a temperature emissivity separation algorithm and store the data into a custom web-based service. The presented system of systems allows field collected spectra to be used for various applications by spectral analysts in the future.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122680101","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

Extended SWIR imaging sensors for hyperspectral imaging applications 用于高光谱成像应用的扩展SWIR成像传感器

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2223737

A. Weber, M. Benecke, J. Wendler, A. Sieck, D. Hübner, H. Figgemeier, R. Breiter

{"title":"Extended SWIR imaging sensors for hyperspectral imaging applications","authors":"A. Weber, M. Benecke, J. Wendler, A. Sieck, D. Hübner, H. Figgemeier, R. Breiter","doi":"10.1117/12.2223737","DOIUrl":"https://doi.org/10.1117/12.2223737","url":null,"abstract":"AIM has developed SWIR modules including FPAs based on liquid phase epitaxy (LPE) grown MCT usable in a wide range of hyperspectral imaging applications. Silicon read-out integrated circuits (ROIC) provide various integration and readout modes including specific functions for spectral imaging applications. An important advantage of MCT based detectors is the tunable band gap. The spectral sensitivity of MCT detectors can be engineered to cover the extended SWIR spectral region up to 2.5μm without compromising in performance. AIM developed the technology to extend the spectral sensitivity of its SWIR modules also into the VIS. This has been successfully demonstrated for 384x288 and 1024x256 FPAs with 24μm pitch. Results are presented in this paper. The FPAs are integrated into compact dewar cooler configurations using different types of coolers, like rotary coolers, AIM’s long life split linear cooler MCC030 or extreme long life SF100 Pulse Tube cooler. The SWIR modules include command and control electronics (CCE) which allow easy interfacing using a digital standard interface. The development status and performance results of AIM’s latest MCT SWIR modules suitable for hyperspectral systems and applications will be presented.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132628017","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

Developing terahertz imaging equation and enhancement of the resolution of terahertz images using deconvolution 建立太赫兹成像方程及利用反卷积增强太赫兹图像的分辨率

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2228680

Kiarash Ahi, M. Anwar

{"title":"Developing terahertz imaging equation and enhancement of the resolution of terahertz images using deconvolution","authors":"Kiarash Ahi, M. Anwar","doi":"10.1117/12.2228680","DOIUrl":"https://doi.org/10.1117/12.2228680","url":null,"abstract":"This paper introduces a novel reconstruction approach for enhancing the resolution of the terahertz (THz) images. For this purpose the THz imaging equation is derived. According to our best knowledge we are reporting the first THz imaging equation by this paper. This imaging equation is universal for THz far-field imaging systems and can be used for analyzing, describing and modeling of these systems. The geometry and behavior of Gaussian beams in far-field region imply that the FWHM of the THz beams diverge as the frequencies of the beams decrease. Thus, the resolution of the measurement decreases in lower frequencies. On the other hand, the depth of penetration of THz beams decreases as frequency increases. Roughly speaking beams in sub 1.5 THz, are transmitted into integrated circuit (IC) packages and the similar packaged objects. Thus, it is not possible to use the THz pulse with higher frequencies in order to achieve higher resolution inspection of packaged items. In this paper, after developing the 3-D THz point spread function (PSF) of the scanning THz beam and then the THz imaging equation, THz images are enhanced through deconvolution of the THz PSF and THz images. As a result, the resolution has been improved several times beyond the physical limitations of the THz measurement setup in the far-field region and sub-Nyquist images have been achieved. Particularly, MSE and SSIM´ have been increased by 27% and 50% respectively. Details as small as 0.2 mm were made visible in the THz images which originally reveals no details smaller than 2.2 mm. In other words the resolution of the images has been increased by 10 times. The accuracy of the reconstructed images was proved by high resolution X-ray images.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123848830","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: 50

Comparative analysis of Worldview-2 and Landsat 8 for coastal saltmarsh mapping accuracy assessment Worldview-2与Landsat 8在沿海盐沼制图精度评估中的比较分析

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2222960

Sikdar M. M. Rasel, Hsing-Chung Chang, I. J. Diti, T. Ralph, N. Saintilan

{"title":"Comparative analysis of Worldview-2 and Landsat 8 for coastal saltmarsh mapping accuracy assessment","authors":"Sikdar M. M. Rasel, Hsing-Chung Chang, I. J. Diti, T. Ralph, N. Saintilan","doi":"10.1117/12.2222960","DOIUrl":"https://doi.org/10.1117/12.2222960","url":null,"abstract":"Coastal saltmarsh and their constituent components and processes are of an interest scientifically due to their ecological function and services. However, heterogeneity and seasonal dynamic of the coastal wetland system makes it challenging to map saltmarshes with remotely sensed data. This study selected four important saltmarsh species Pragmitis australis, Sporobolus virginicus, Ficiona nodosa and Schoeloplectus sp. as well as a Mangrove and Pine tree species, Avecinia and Casuarina sp respectively. High Spatial Resolution Worldview-2 data and Coarse Spatial resolution Landsat 8 imagery were selected in this study. Among the selected vegetation types some patches ware fragmented and close to the spatial resolution of Worldview-2 data while and some patch were larger than the 30 meter resolution of Landsat 8 data. This study aims to test the effectiveness of different classifier for the imagery with various spatial and spectral resolutions. Three different classification algorithm, Maximum Likelihood Classifier (MLC), Support Vector Machine (SVM) and Artificial Neural Network (ANN) were tested and compared with their mapping accuracy of the results derived from both satellite imagery. For Worldview-2 data SVM was giving the higher overall accuracy (92.12%, kappa =0.90) followed by ANN (90.82%, Kappa 0.89) and MLC (90.55%, kappa = 0.88). For Landsat 8 data, MLC (82.04%) showed the highest classification accuracy comparing to SVM (77.31%) and ANN (75.23%). The producer accuracy of the classification results were also presented in the paper.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"9864 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128754616","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: 4

Dislocation reduction in HgCdTe grown on CdTe/Si 在CdTe/Si上生长的HgCdTe的位错还原

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-26 DOI: 10.1117/12.2229309

P. Wijewarnasuriya

{"title":"Dislocation reduction in HgCdTe grown on CdTe/Si","authors":"P. Wijewarnasuriya","doi":"10.1117/12.2229309","DOIUrl":"https://doi.org/10.1117/12.2229309","url":null,"abstract":"Bulk-grown CdZnTe (Zn = 3%) substrates are the natural choice for HgCdTe epitaxy since it is lattice matched to long wave LW-HgCdTe alloy. However, lack of large area CdZnTe substrates, high production costs, and more importantly, the difference in thermal expansion coefficients between CdZnTe and silicon Read out Integrated Circuits (ROIC) are some of the inherent drawbacks of CdZnTe substrates. Consequently, Hg1-xCdxTe detectors fabricated on silicon substrates are an attractive alternative. Recent developments in the molecular beam epitaxy (MBE) buffer layer growth technology on Si substrates has revolutionized the HgCdTe research and offered a new dimension to HgCdTe-based IR technology. Si substrates provide advantages in terms of relatively large area (3 to 6-inch diameter is easily obtained) compared to CZT substrate materials, durability during processing, and reliability to thermal cycling. Innovations in Si-based composite substrates made it possible to fabricate very large-format IR arrays that offer higher resolution, low-cost arrays and more dies per wafer. Between Si substrates and HgCdTe has large lattice mismatch of 19%. This leads to dislocation densities of low-107 cm-2 for optimal growth of HgCdTe on silicon-based substrates as compared to the mid-104 cm-2 dislocation density of HgCdTe grown on CdZnTe. This paper present dislocation reduction by two orders of magnitude using thermal cycle anneal under Hg environment on HgCdTe grown on Si substrates and as well as defect reduction in Cd(Se)Te buffer layers grown on Si Substrates.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127548486","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