Infrared Physics & Technology最新文献_第2页

K-means adaptive 2DSSA based on sparse representation model for hyperspectral target detection 基于稀疏表示模型的 K-means 自适应 2DSSA 用于高光谱目标检测

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-30 DOI: 10.1016/j.infrared.2024.105616

Tianshu Zhou , Yi Cen , Jiani He , Yueming Wang

{"title":"K-means adaptive 2DSSA based on sparse representation model for hyperspectral target detection","authors":"Tianshu Zhou , Yi Cen , Jiani He , Yueming Wang","doi":"10.1016/j.infrared.2024.105616","DOIUrl":"10.1016/j.infrared.2024.105616","url":null,"abstract":"<div><div>Target detection is a hot spot in hyperspectral imagery (HSI) processing. The detection accuracy of target detection algorithms based on sparse representation (SR) models usually suffers from the high reconstruction residuals caused by inaccurate background estimations and insufficient target samples. Besides, with the development of hyperspectral imaging technology, the spatial resolution of HSI has been continuously enhanced, which can provide more spatial information for target detection. However, spatial information is often overlooked, leading to the underutilization of the pluralistic features of HSI. Target detection using only spectral information is susceptible to spectral variation, resulting in a high false alarm rate. To alleviate these problems, this paper proposes a joint spatial-spectral algorithm. In terms of spectra, a dictionary construction strategy (DCS) is designed for the sparse representation-based binary hypothesis (SRBBH) detector to reduce reconstruction residuals of target and background samples. In terms of space, k-means 2D adaptive singular spectrum analysis (KSSA) is used to extract spatial features in cluster units. Using spatial features can enhance the robustness of the algorithm to spectral variation, thereby reducing false alarms. The target detection results are obtained by applying DCS-SRBBH to the KSSA feature image. We evaluate the proposed algorithm on three datasets: two public and one of our own. Comprehensive experimental results indicate that the proposed algorithm outperforms other target detection algorithms in terms of accuracy.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105616"},"PeriodicalIF":3.1,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Dielectric-elastomer-driven long-wave infrared Alvarez lenses for continuous zooming imaging 用于连续变焦成像的介电弹性体驱动长波红外阿尔瓦雷斯透镜

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-29 DOI: 10.1016/j.infrared.2024.105614

Yang Cheng , Qi OuYang , Cancan Yao , Lin Liu , Zhaohui Li , Qun Hao

{"title":"Dielectric-elastomer-driven long-wave infrared Alvarez lenses for continuous zooming imaging","authors":"Yang Cheng , Qi OuYang , Cancan Yao , Lin Liu , Zhaohui Li , Qun Hao","doi":"10.1016/j.infrared.2024.105614","DOIUrl":"10.1016/j.infrared.2024.105614","url":null,"abstract":"<div><div>With the concept of SWaP-C (size, weight, power, and cost), a light, small, low-cost, and high-performance uncooled infrared optical zooming imaging system is pursued. However, the traditional mechanical optical zooming method makes it difficult to meet those requirements. In this paper, a compact uncooled long-wave infrared continuous zooming imaging system using the Alvarez lens actuated by dielectric elastomer is proposed. The infrared zoom imaging system mainly consists of two pairs of infrared Alvarez lenses, an adjustable optical stop, focusing lenses, and an infrared detector. The first pair of infrared Alvarez lenses serves as the zoom group and the second pair serves as the compensation group. The infrared Alvarez lenses are fabricated by five-axis diamond turning and milling technology. The experiment results show that when the dielectric elastomer can provide a lateral displacement of 1.44 mm to the first pair of infrared Alvarez lenses and a lateral displacement of 1.03 mm to the second pair of infrared Alvarez lenses. The infrared continuous zooming imaging system covers the long-wave band of 8 ∼ 12 µm. The zoom ratio can be changed from 5 × to 15 × and the F-number is 2.0. The total optical length of the proposed system is less than 80 mm. The resolution of the infrared detector is 640 × 512 with a pixel spacing of 17 µm. The dynamic response time testing revealed that the rise and fall times are 132 ms and 92 ms, respectively. The proposed long-wave infrared continuous zooming imaging system can be used in miniaturized devices such as UAV equipment and thermal imaging cameras in the future.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105614"},"PeriodicalIF":3.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

A miniaturized multi-mechanism resonance-enhanced fiber optic photoacoustic multi-gas sensor 微型多机制共振增强光纤光声多气体传感器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-29 DOI: 10.1016/j.infrared.2024.105615

Guojie Wu , Yuchen Guan , Zhenfeng Gong , Xue Wu , Liang Mei

{"title":"A miniaturized multi-mechanism resonance-enhanced fiber optic photoacoustic multi-gas sensor","authors":"Guojie Wu , Yuchen Guan , Zhenfeng Gong , Xue Wu , Liang Mei","doi":"10.1016/j.infrared.2024.105615","DOIUrl":"10.1016/j.infrared.2024.105615","url":null,"abstract":"<div><div>A multi-mechanism resonance-enhanced fiber-optic photoacoustic multi-gas sensor (MR-FOPMS) is reported, in which the acoustic resonance of the T-type resonator is employed for C<sub>2</sub>H<sub>2</sub> gas sensing and the mechanical resonance of the silicon cantilever is employed for the detection of CH<sub>4</sub> gas sensing. The silicon cantilever fiber-optic microphone and T-type photoacoustic resonator are designed using theoretical and finite element methods. The optimized cavity volume of the entire sensor is only 9.3 cm<sup>3</sup> and the optimized silicon cantilever microphone has an ultra-high sensitivity of 62540.2 nm/Pa at the resonance. The ability of the sensor to detect multiple gases is demonstrated by simultaneous measurement of C<sub>2</sub>H<sub>2</sub> and CH<sub>4</sub> using two DFB lasers at 1532.8 nm and 1650.96 nm as excitation sources. The lowest detection limits of the sensor are determined to be 158 and 382 ppb for C<sub>2</sub>H<sub>2</sub> and CH<sub>4</sub>, respectively, corresponding to normalized noise equivalent absorption coefficients of 2.82 × 10<sup>-9</sup>, 1.43 × 10<sup>-9</sup> cm<sup>−1</sup> W Hz<sup>−1/2</sup>, respectively.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105615"},"PeriodicalIF":3.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Gate-tunable in-sensor computing vdW heterostructures for infrared photodetection 用于红外光探测的栅极可调谐传感器内计算 vdW 异质结构

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-28 DOI: 10.1016/j.infrared.2024.105611

Hangyu Xu , Chenyu Huang , Tengfei Xu , Zexi Liu , Rong Zhao , Jiale He , Tiange Zhao , Xiao Fu

{"title":"Gate-tunable in-sensor computing vdW heterostructures for infrared photodetection","authors":"Hangyu Xu , Chenyu Huang , Tengfei Xu , Zexi Liu , Rong Zhao , Jiale He , Tiange Zhao , Xiao Fu","doi":"10.1016/j.infrared.2024.105611","DOIUrl":"10.1016/j.infrared.2024.105611","url":null,"abstract":"<div><div>Convolutional preprocessing is feasible for feature extraction and accurate recognition. In-sensor computing, which requires a photodetector with a computation function, is a potential candidate for hardware-implemented preprocessing. However, limited by the high carrier concentration in infrared sensing materials, reconfigurable manipulation of photocarriers is hardly complemented. Thus, previous works mostly focused on preprocessing in the visible range. Here, we propose a gate-tunable BP/MoS<sub>2</sub> heterostructure. With an elaborate design on the material’s thickness, the depletion region can be precisely controlled, resulting in multiple and reconfigurable responsivity states. With a sharp and clean interface, our device shows strong linear dependence over the broadband spectrum, which is the prerequisite for constructing convolutional kernels. Furthermore, observing the maximum photocurrent in the <em>V<sub>g</sub></em> sweeping process demonstrates strong regulation of carrier concentration in the infrared sensing material, BP layer. Since it has superior performance in high linearity and multiple states construction, our device is suitable for realizing computation in photodetector for convolutional preprocessing, underscoring its superiority in intelligent infrared perception and preprocessing.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105611"},"PeriodicalIF":3.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

An improved infrared polarization model considering the volume scattering effect for coating materials 考虑到涂层材料体积散射效应的改进型红外偏振模型

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-28 DOI: 10.1016/j.infrared.2024.105613

Min Yang , Xianzhong Sun , Dapeng Chen , Peng Xiu , Jie Yang , Hongxia Mao

{"title":"An improved infrared polarization model considering the volume scattering effect for coating materials","authors":"Min Yang , Xianzhong Sun , Dapeng Chen , Peng Xiu , Jie Yang , Hongxia Mao","doi":"10.1016/j.infrared.2024.105613","DOIUrl":"10.1016/j.infrared.2024.105613","url":null,"abstract":"<div><div>The conventional infrared polarization models ignore the absorption and scattering of infrared light within the coating materials, as well as directional diffuse reflection effect of infrared radiation on the coating surface, which have the limitation for the description of infrared polarization characteristic of coating materials. An improved infrared polarized bidirectional reflectance distribution function (pBRDF) model is proposed based on the microfacet theory, which integrates a volume scattering component developed from the Kubelka-Munk theory, a multiple reflection component and a specular reflection component. This model is more consistent with the infrared polarization characteristics within the actual coating materials. The expression of degree of linear polarization (DoLP) of the infrared radiation is derived. The infrared polarization data of the silver and brown coatings at different measuring angles are acquired by the infrared polarization imaging system, and the model parameters are inverted using the least squares inverse performance method. The simulated and measured results for our coating samples show that the DoLP values simulated by the improved infrared pBRDF model are found in a good agreement with the measurements. The infrared DoLP does not change with the azimuth angle, and mainly influenced by the detection zenith angle, which has a great potential for material classification, polarization remote sensing and infrared scene modeling.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105613"},"PeriodicalIF":3.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Spectral data analysis based on bagging stochastic configuration networks 基于袋式随机配置网络的频谱数据分析

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-25 DOI: 10.1016/j.infrared.2024.105609

Lixin Zhang , Zhensheng Huang

引用次数: 0

Phase Demodulation under Ultra-low sampling rate in heterodyne coherent Φ-OTDR 异频相干 Φ-OTDR 超低采样率下的相位解调

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-23 DOI: 10.1016/j.infrared.2024.105597

Heng Qian , Maojiang Cui , Yingna Li , Chuan Li , Chengli Li

{"title":"Phase Demodulation under Ultra-low sampling rate in heterodyne coherent Φ-OTDR","authors":"Heng Qian , Maojiang Cui , Yingna Li , Chuan Li , Chengli Li","doi":"10.1016/j.infrared.2024.105597","DOIUrl":"10.1016/j.infrared.2024.105597","url":null,"abstract":"<div><div>Heterodyne coherent phase-sensitive optical time-domain reflectometry(<span><math><mi>Φ</mi></math></span>-OTDR) requires a higher data sampling rate to demodulate phase in the “distance” direction effectively. Aiming at the problem of large amount of demodulated data, we propose a phase demodulation method that can effectively recover disturbance information from ultra-low sampling data. This method demodulates the phase of the two-dimensional reconstructed signal in the “time” direction. Thus, the influence of spectrum aliasing in the “distance” direction caused by undersampling is avoided. The undersampling rate is not limited by the spectrum aliasing effect of the detected signal when using this method to demodulate phase. Therefore, accurate phase information can be retrieved under ultra-low sampling rates, significantly reducing the data for phase demodulation in heterodyne coherent <span><math><mi>Φ</mi></math></span>-OTDR. In the experiment, three sampling rates (100 MSa/s, 10 MSa/s, 1 MSa/s) within the restricted area of the traditional undersampling demodulation method were selected to acquire data, and the proposed method can also accurately demodulate phase information.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105597"},"PeriodicalIF":3.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Optical and dielectric properties of water-bearing sandstones in the terahertz range 太赫兹范围内含水砂岩的光学和介电特性

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-23 DOI: 10.1016/j.infrared.2024.105610

ChuTong Gao , ZhiYuan Zheng , Lixian Hao , Tong Zhang , MingRui Zhang , Qiming Qiu , Shanshan Li , Xiaodi Zheng , HaoChong Huang , Kunfeng Qiu

引用次数: 0

Marine remote target signal extraction based on 128 line-array single photon LiDAR 基于 128 线阵单光子激光雷达的海洋远程目标信号提取

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-23 DOI: 10.1016/j.infrared.2024.105592

Ziqiang Peng , Han Wang , Xiaokai She , Ruikai Xue , Wei Kong , Genghua Huang

{"title":"Marine remote target signal extraction based on 128 line-array single photon LiDAR","authors":"Ziqiang Peng , Han Wang , Xiaokai She , Ruikai Xue , Wei Kong , Genghua Huang","doi":"10.1016/j.infrared.2024.105592","DOIUrl":"10.1016/j.infrared.2024.105592","url":null,"abstract":"<div><div>LiDAR technology has garnered significant attention in recent years due to its superior directivity, high resolution, and precise 3D information acquisition capabilities, making it indispensable in navigation systems. Among its variants, single-photon LiDAR stands out for maritime applications, owing to its reduced power consumption and extended detection range. However, the high sensitivity of single-photon detectors often results in substantial noise, necessitating effective denoising before data can be utilized for identification, tracking, and other purposes. In this study, we present a novel 128-line, 1550 nm shipborne long-range single-photon LiDAR system, with data collected and analyzed in maritime environments. This system contends with challenges such as a large dynamic range, abundant noise photons, and the complexity of sea surface conditions. To address these issues, we propose an efficient and adaptive denoising algorithm based on the k-th nearest neighbor (KNN) methodology. By examining the distribution characteristics of signal and noise photons, our approach enables target extraction even under conditions of intense noise and sparse signals. Our method exhibits robust adaptability across various detection scenarios. Experimental evaluations demonstrate its efficacy, accurately identifying targets at distances of 3.2 km in clear weather and 1.6 km in foggy conditions.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"143 ","pages":"Article 105592"},"PeriodicalIF":3.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Large bandwidth array waveguide grating design for FBG interrogation system 用于 FBG 检测系统的大带宽阵列波导光栅设计

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-10-20 DOI: 10.1016/j.infrared.2024.105599

Yiyao Yang , Pei Yuan , Ran Xu , Bingxiang Li , Lianqing Zhu

引用次数: 0