SPIE Commercial + Scientific Sensing and Imaging最新文献_第10页

A proposed optical test for Popper's challenge to quantum mechanics 为波普尔对量子力学的挑战提出的光学测试

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-19 DOI: 10.1117/12.2222307

J. Reintjes, M. Bashkansky

引用次数: 0

Higher-order spontaneous parametric down-conversion with back-propagating idler using a submicron poled KTP waveguide 采用亚微米极化KTP波导的高阶自发参数下转换与反向传播闲散器

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-19 DOI: 10.1117/12.2222303

M. Bashkansky, M. Pruessner, I. Vurgaftman, Mijin Kim, J. Reintjes

{"title":"Higher-order spontaneous parametric down-conversion with back-propagating idler using a submicron poled KTP waveguide","authors":"M. Bashkansky, M. Pruessner, I. Vurgaftman, Mijin Kim, J. Reintjes","doi":"10.1117/12.2222303","DOIUrl":"https://doi.org/10.1117/12.2222303","url":null,"abstract":"Spontaneous parametric downconversion (SPDC) using periodically poled nonlinear optical crystals under the quasiphase- matching condition has found wide use in quantum optics. High efficiencies and good coupling to single-mode fibers resulted from using channel waveguides in crystals. It is often desirable to have a very narrow bandwidth for the signal and idler photons, but under the typical operating conditions, phase matching dictates the bandwidth of the SPDC to be of the order of <1 nm. This occurs because the co-propagating signal and idler photons are entangled, and an increase of the signal wave-vector is compensated by a decrease of the idler wave-vector. One way to reduce the bandwidth is by forming either external or internal cavities. Additionally, bandwidth reduction is possible without cavities when the signal and idler are counter-propagating, and the changes in the wave-vector with frequency are additive. To accomplish this a domain inversion on the wavelength scale is required. In this work, we experimentally demonstrate SPDC in one-dimensional KTP-based waveguides with sub-micron poling for forward and backward interactions. Some of the spectral features of the generated light are accounted for by mode coupling theory in periodically poled waveguides but other features are as yet not explained.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127804025","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: 3

Quantum hyper-entanglement and angular spectrum decomposition applied to sensors 量子超纠缠和角谱分解在传感器中的应用

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-19 DOI: 10.1117/12.2222147

James F. Smith

{"title":"Quantum hyper-entanglement and angular spectrum decomposition applied to sensors","authors":"James F. Smith","doi":"10.1117/12.2222147","DOIUrl":"https://doi.org/10.1117/12.2222147","url":null,"abstract":"Hyper-entanglement with an emphasis on mode type is used to extend a previously developed atmospheric imaging system. Angular spectrum expansions combined with second quantization formalism permits many different mode types to be considered using a common formalism. Fundamental Gaussian, standard Hermite-Gaussian, standard Laguerre- Gaussian, and Bessel modes are developed. Hyper-entanglement refers to entanglement in more than one degree of freedom, e.g. polarization, energy-time and orbital angular momentum. The system functions at optical or infrared frequencies. Only the signal photon propagates in the atmosphere, the ancilla photon is retained within the detector. This results in loss being essentially classical, giving rise to stronger forms of entanglement. A simple atomic physics based model of the scattering target is developed. This model permits the derivation in closed form of the loss coefficient for photons with a given mode type scattering from the target. Signal loss models for propagation, transmission, detection, and scattering are developed and applied. The probability of detection of photonic orbital angular momentum is considered in terms of random media theory. A model of generation and detection efficiencies for the different degrees of freedom is also considered. The implications of loss mechanisms for signal to noise ratio (SNR), and other quantum information theoretic quantities are discussed. Techniques for further enhancing the system’s SNR and resolution through adaptive optics are examined. The formalism permits random noise and entangled or nonentangled sources of interference to be modeled.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"9873 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130932359","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: 14

Detection of fresh bruises in apples by structured-illumination reflectance imaging 结构照明反射成像技术检测苹果鲜伤

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2225148

Yuzhen Lu, Richard Li, R. Lu

{"title":"Detection of fresh bruises in apples by structured-illumination reflectance imaging","authors":"Yuzhen Lu, Richard Li, R. Lu","doi":"10.1117/12.2225148","DOIUrl":"https://doi.org/10.1117/12.2225148","url":null,"abstract":"Detection of fresh bruises in apples remains a challenging task due to the absence of visual symptoms and significant chemical alterations of fruit tissues during the initial stage after the fruit have been bruised. This paper reports on a new structured-illumination reflectance imaging (SIRI) technique for enhanced detection of fresh bruises in apples. Using a digital light projector engine, sinusoidally-modulated illumination at the spatial frequencies of 50, 100, 150 and 200 cycles/m was generated. A digital camera was then used to capture the reflectance images from ‘Gala’ and ‘Jonagold’ apples, immediately after they had been subjected to two levels of bruising by impact tests. A conventional three-phase demodulation (TPD) scheme was applied to the acquired images for obtaining the planar (direct component or DC) and amplitude (alternating component or AC) images. Bruises were identified in the amplitude images with varying image contrasts, depending on spatial frequency. The bruise visibility was further enhanced through post-processing of the amplitude images. Furthermore, three spiral phase transform (SPT)-based demodulation methods, using single and two images and two phase-shifted images, were proposed for obtaining AC images. Results showed that the demodulation methods greatly enhanced the contrast and spatial resolution of the AC images, making it feasible to detect the fresh bruises that, otherwise, could not be achieved by conventional imaging technique with planar or uniform illumination. The effectiveness of image enhancement, however, varied with spatial frequency. Both 2-image and 2-phase SPT methods achieved the performance similar to that by conventional TPD. SIRI technique has demonstrated the capability of detecting fresh bruises in apples, and it has the potential as a new imaging modality for enhancing food quality and safety detection.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124397237","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

Whole-surface round object imaging method using line-scan hyperspectral imaging system 采用线扫描高光谱成像系统的全表面圆形物体成像方法

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2225859

I. Baek, S. Gadsden, B. Cho, H. Lee, M. Kim

引用次数: 2

Rapid discrimination of main red meat species based on near-infrared hyperspectral imaging technology 基于近红外高光谱成像技术的主要红肉品种快速识别

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2223296

Lu Qiao, Yankun Peng, K. Chao, J. Qin

{"title":"Rapid discrimination of main red meat species based on near-infrared hyperspectral imaging technology","authors":"Lu Qiao, Yankun Peng, K. Chao, J. Qin","doi":"10.1117/12.2223296","DOIUrl":"https://doi.org/10.1117/12.2223296","url":null,"abstract":"Meat is the necessary source of essential nutrients for people including protein, fat, and so on. The discrimination of meat species and the determination of meat authenticity have been an important issue in the meat industry. The objective of this study is to realize the fast and accurate identification of three main red meats containing beef, lamb and pork by using near-infrared hyperspectral imaging (HSI) technology. After acquiring the hyperspectral images of meat samples, the calibration of acquired images and selection of the region of interest (ROI) were carried out. Then spectral preprocessing method of standard normal variate correction (SNV) was used to reduce the light scattering and random noise before the spectral analysis. Finally, characteristic wavelengths were extracted by principal component analysis (PCA), and the Fisher linear discriminant method was applied to establish Fisher discriminant functions to identify the meat species. All the samples were collected from different batches in order to improve the coverage of the models. In addition to the validation of sample itself in train set and cross validation, three different meat samples were sliced at the size of 2cm×2cm×2 cm approximately and were spliced together in one interface to be scanned by HSI system. The acquired hyperspectral data was applied to further validate the discriminant model. The results demonstrated that the near-infrared hyperspectral imaging technology could be applied as an effective, rapid and non-destructive discrimination method for main red meats.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128747651","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: 3

Electrostatic spray deposition of Li4Ti5O12 based anode with enhanced rate capability and energy density for lithium-ion batteries 静电喷涂沉积提高锂离子电池倍率和能量密度的Li4Ti5O12基阳极

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2228905

Chunhui Chen, R. Agrawal, Chunlei Wang

引用次数: 1

Food inspection using hyperspectral imaging and SVDD 利用高光谱成像和SVDD技术进行食品检测

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2223938

Faruk Sukru Uslu, Hamidullah Binol, A. Bal

{"title":"Food inspection using hyperspectral imaging and SVDD","authors":"Faruk Sukru Uslu, Hamidullah Binol, A. Bal","doi":"10.1117/12.2223938","DOIUrl":"https://doi.org/10.1117/12.2223938","url":null,"abstract":"Nowadays food inspection and evaluation is becoming significant public issue, therefore robust, fast, and environmentally safe methods are studied instead of human visual assessment. Optical sensing is one of the potential methods with the properties of being non-destructive and accurate. As a remote sensing technology, hyperspectral imaging (HSI) is being successfully applied by researchers because of having both spatial and detailed spectral information about studied material. HSI can be used to inspect food quality and safety estimation such as meat quality assessment, quality evaluation of fish, detection of skin tumors on chicken carcasses, and classification of wheat kernels in the food industry. In this paper, we have implied an experiment to detect fat ratio in ground meat via Support Vector Data Description which is an efficient and robust one-class classifier for HSI. The experiments have been implemented on two different ground meat HSI data sets with different fat percentage. Addition to these implementations, we have also applied bagging technique which is mostly used as an ensemble method to improve the prediction ratio. The results show that the proposed methods produce high detection performance for fat ratio in ground meat.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"2020 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114531530","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: 3

A CubeSat deployable solar panel system 立方体卫星可展开太阳能电池板系统

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2223566

T. Mcguire, Michael P. Hirsch, Michael Parsons, S. Leake, J. Straub

引用次数: 8

Method for detection of a few pathogenic bacteria and determination of live versus dead cells 几种致病菌的检测及活细胞与死细胞的测定方法

SPIE Commercial + Scientific Sensing and Imaging Pub Date : 2016-05-17 DOI: 10.1117/12.2228142

S. Horikawa, I. Chen, Songtao Du, Yuzhe Liu, H. Wikle, S. Suh, J. Barbaree, B. Chin

{"title":"Method for detection of a few pathogenic bacteria and determination of live versus dead cells","authors":"S. Horikawa, I. Chen, Songtao Du, Yuzhe Liu, H. Wikle, S. Suh, J. Barbaree, B. Chin","doi":"10.1117/12.2228142","DOIUrl":"https://doi.org/10.1117/12.2228142","url":null,"abstract":"This paper presents a method for detection of a few pathogenic bacteria and determination of live versus dead cells. The method combines wireless phage-coated magnetoelastic (ME) biosensors and a surface-scanning dectector, enabling real-time monitoring of the growth of specific bacteria in a nutrient broth. The ME biosensor used in this investigation is composed of a strip-shaped ME resonator upon which an engineered bacteriophage is coated to capture a pathogen of interest. E2 phage with high binding affinity for Salmonella Typhimurium was used as a model study. The specificity of E2 phage has been reported to be 1 in 105 background bacteria. The phage-coated ME biosensors were first exposed to a low-concentration Salmonella suspension to capture roughly 300 cells on the sensor surface. When the growth of Salmonella in the broth occurs, the mass of the biosensor increases, which results in a decrease in the biosensor's resonant frequency. Monitoring of this mass- induced resonant frequency change allows for real-time detection of the presence of Salmonella. Detection of a few bacteria is also possible by growing them to a sufficient number. The surface-scanning detector was used to measure resonant frequency changes of 25 biosensors sequentially in an automated manner as a function of time. This methodology offers direct, real-time detection, quantification, and viability determination of specific bacteria. The rate of the sensor's resonant frequency change was found to be largely dependent on the number of initially bound cells and the efficiency of cell growth.","PeriodicalId":299313,"journal":{"name":"SPIE Commercial + Scientific Sensing and Imaging","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115944046","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