Infrared Physics & Technology最新文献_第4页

PoLP-ICOP: Cross-validation of Power of Linear Polarization and Infrared CRI-based Optimal Polarization for artificial object detection PoLP-ICOP：线性偏振功率与基于红外cri的最优偏振在人工目标检测中的交叉验证

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-16 DOI: 10.1016/j.infrared.2025.105842

Sungho Kim , Sanghyuk An

{"title":"PoLP-ICOP: Cross-validation of Power of Linear Polarization and Infrared CRI-based Optimal Polarization for artificial object detection","authors":"Sungho Kim , Sanghyuk An","doi":"10.1016/j.infrared.2025.105842","DOIUrl":"10.1016/j.infrared.2025.105842","url":null,"abstract":"<div><div>It is important to detect man-made objects in a natural background to reduce false detections in long-wave infrared for safety and security applications. The degree of linear polarization (DoLP) is used frequently to solve such problems. DoLP can provide important clues for man-made object signatures. On the other hand, DoLP cannot handle the polarization power because of normalization. First, a novel physics-driven power of linear polarization (PoLP) metric is proposed to find optimal infrared polarization conditions analytically. Second, a data-driven infrared polarization method is presented. Few studies have been conducted in terms of polarimetric optimization at a low level. This paper presents a novel polarimetric information utilization method by applying a two-layered neural network with the inverse contrast radiant intensity (CRI) loss function to find physical meaning. The proposed infrared CRI-based optimal polarimetry (ICOP) could extract the low-level contribution of each polarimetric image in discriminating artificial objects in a natural background. After optimization, the learned weights of the polarimetric images were sine-like, which produced optimal object and background separation. The experimental results for the outdoor scenario validated the optimality of the proposed ICOP in man-made object detection in a natural background. Finally, the physics-driven PoLP coincided with the data-driven ICOP in man-made object detection.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105842"},"PeriodicalIF":3.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864564","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

Minority carrier lifetime and operating voltage dependence on the barrier layer thickness in nBn infrared photodetectors nBn红外光电探测器中少数载流子寿命和工作电压与阻挡层厚度的关系

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-15 DOI: 10.1016/j.infrared.2025.105846

M. Tornay , A. Ramiandrasoa , M. Bouschet , J.-P. Perez , J.-L. Reverchon , B. Simozrag , C. Bonvalot , I. Ribet , N. Péré-Laperne , P. Christol

引用次数: 0

LSC-TES: Local spectral curvature-based accurate temperature-emissivity separation in indoor environments LSC-TES：室内环境中基于局部光谱曲率的精确温度发射率分离

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-14 DOI: 10.1016/j.infrared.2025.105837

Sungho Kim , Yewon Jang , Jaeho Kim , Kyeong Jin Jeong

{"title":"LSC-TES: Local spectral curvature-based accurate temperature-emissivity separation in indoor environments","authors":"Sungho Kim , Yewon Jang , Jaeho Kim , Kyeong Jin Jeong","doi":"10.1016/j.infrared.2025.105837","DOIUrl":"10.1016/j.infrared.2025.105837","url":null,"abstract":"<div><div>Temperature-emissivity separation (TES) is a very interesting technique that estimates both the surface temperature and spectral emissivity from hyperspectral data such as Fourier transform infrared spectroscopy. The TES method is necessary for measuring the temperature of an object to which a contact thermometer cannot be attached. The iterative spectral smoothness TES (ISS-TES) method works well in outdoor environments with strong absorption in downwelling. In indoor environments, ISS-TES cannot work properly because of two factors: almost no absorption in downwelling and thermal equilibrium between an object and its surroundings. This study analyzes the causes of incorrect TES of ISS-TES through mathematical derivations and simulations. Based on these analyses, a novel local spectral curvature-TES (LSC-TES) method is proposed for stable temperature and spectral emissivity estimation in indoor environments. The application of local spectral smoothness instead of global spectral smoothness in ISS-TES on a heated object can mitigate the limitations of ISS-TES. The experimental results obtained using simulations and TELOPS Hyper-CAM LWIR validate the feasibility of the proposed LSC-TES in indoor environments.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105837"},"PeriodicalIF":3.1,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839712","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

<100 kHz linewidth, single-longitudinal mode 1064 nm laser with a high reflectivity Fabry-Perot etalon 线宽<100 kHz，单纵模1064 nm激光器，具有高反射率法布里-珀罗标准子

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-12 DOI: 10.1016/j.infrared.2025.105858

Xiaojie Chen , Renpeng Yan , Yugang Jiang , Rongwei Fan , Deying Chen , Xudong Li

引用次数: 0

Thermal and laser performance of Er:SGGG crystal through double end-pumping configuration 双端抽运Er:SGGG晶体的热性能和激光性能

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-12 DOI: 10.1016/j.infrared.2025.105847

Hongyuan Li , Dunlu Sun , Huili Zhang , Jianqiao Luo , Cong Quan , Kunpeng Dong , Yuwei Chen , Zhentao Wang , Maojie Cheng

{"title":"Thermal and laser performance of Er:SGGG crystal through double end-pumping configuration","authors":"Hongyuan Li , Dunlu Sun , Huili Zhang , Jianqiao Luo , Cong Quan , Kunpeng Dong , Yuwei Chen , Zhentao Wang , Maojie Cheng","doi":"10.1016/j.infrared.2025.105847","DOIUrl":"10.1016/j.infrared.2025.105847","url":null,"abstract":"<div><div>In continuous-wave (CW) mode, some Gd<sub>3-</sub><em><sub>x</sub></em>Ca<em><sub>x</sub></em>Mg<em><sub>y</sub></em>Zr<em><sub>x</sub></em><sub>+</sub><em><sub>y</sub></em>Ga<sub>5-</sub><em><sub>x</sub></em><sub>-2</sub><em><sub>y</sub></em>O<sub>12</sub> (SGGG) laser crystals are unable to withstand the high energy density of the pump light, significantly impacting laser performance and even leading to crystal cracking. In this paper, the thermal and optical properties for Er:SGGG laser crystal are investigated, which are detailed parameters to use for simulation of heat distribution. A double end-pumping configuration in Er:SGGG crystal is demonstrated for the first time, it can significantly mitigate thermal stress compared with traditional single-pumping technique. In terms of laser performances, the maximum output power of 450 mW is realized, the beam quality factors of <span><math><mrow><msubsup><mi>M</mi><mrow><mi>x</mi></mrow><mn>2</mn></msubsup></mrow></math></span>/<span><math><mrow><msubsup><mi>M</mi><mrow><mi>y</mi></mrow><mn>2</mn></msubsup></mrow></math></span> are 4.0/3.4, and the center of wavelength is located at 2794.6 nm with a FWHM of 0.7 nm. This result could provide a beneficial reference to the development and application of mid-infrared lasers using SGGG crystals.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105847"},"PeriodicalIF":3.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843474","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

Explore AI based performance evaluation of underwater fiber laser transmission micro-channeling operation on PMMA material 探索基于人工智能的水下光纤激光传输PMMA材料微通道操作性能评价

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-12 DOI: 10.1016/j.infrared.2025.105856

Subham Biswas , Ranjib Biswas , Manik Chandra Das , Debal Pramanik , Suvanjan Bhattacharyya , Arunanshu Shekhar Kuar

{"title":"Explore AI based performance evaluation of underwater fiber laser transmission micro-channeling operation on PMMA material","authors":"Subham Biswas , Ranjib Biswas , Manik Chandra Das , Debal Pramanik , Suvanjan Bhattacharyya , Arunanshu Shekhar Kuar","doi":"10.1016/j.infrared.2025.105856","DOIUrl":"10.1016/j.infrared.2025.105856","url":null,"abstract":"<div><div>Extensive use of polymers has been found in the manufacturing and production of high-quality microfluidic devices with the advent of modern machining technologies. To use the appropriate material for specific purpose, selection of appropriate machining process becomes crucial. Present study deals with the investigation on the effect of process parameters of laser micro-channelling operation on polymethyl methacrylate (PMMA) plate of thickness 9 mm in partially submerged in water. A fiber laser, specifically one with a wavelength of 1064 nm, has been employed for machining due to its superior performance compared to Nd: YAG or CO<sub>2</sub> lasers. Experiments are carried out to investigate the effect of various laser beam characteristics, such as pulse frequency (PF), laser power (LP), and scanning speed (SS), on the channel depth, kerf width, and heat affected zone width of the machined micro-channel. In this study, fuzzy-technique models for order preference by resemblance to the ideal solution (fuzzy-TOPSIS) have been developed. Additionally, multi-objective optimization of process parameters is performed using ratio analysis (MOORA). Both of the models namely fuzzy-TOPSIS and MOORA indicate that the optimal machining criteria for micro-channeling of PMMA are PF of 65 kHz, LP of 6.5 W and SS of 0.5 mm/s. An analysis of the surface morphological variations in correlation with the channel dimensions is also conducted utilizing scanning electron microscopy (SEM). The study emphasises the efficiency of the methodologies used as powerful tools for developing a comprehensive model and establishing the optimal LBM parameters.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105856"},"PeriodicalIF":3.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834476","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

Diode-end-pumped electro-optically Q-switched Nd:YAG single crystal fiber for direct high-energy laser generation 用于直接产生高能激光的二极管端泵浦电子光学 Q 开关 Nd:YAG 单晶光纤

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-11 DOI: 10.1016/j.infrared.2025.105857

Kun Guo , Jianfa Chen , Dong Wang , Bin Xu , Xudong Cui , Qing Ye

引用次数: 0

Simulation the Alzheimer brain response to 915 nm laser irradiation: Exploring power levels, laser configurations, temperature, and dosages for effective photobiomodulation therapy 模拟阿尔茨海默病大脑对915 nm激光照射的反应：探索有效光生物调节治疗的功率水平、激光配置、温度和剂量

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-11 DOI: 10.1016/j.infrared.2025.105860

Shima Mahdy , Hala S. Abuelmakarem

{"title":"Simulation the Alzheimer brain response to 915 nm laser irradiation: Exploring power levels, laser configurations, temperature, and dosages for effective photobiomodulation therapy","authors":"Shima Mahdy , Hala S. Abuelmakarem","doi":"10.1016/j.infrared.2025.105860","DOIUrl":"10.1016/j.infrared.2025.105860","url":null,"abstract":"<div><div>Alzheimer’s disease (AD)−a progressive neurodegenerative disorder−affects millions of individuals worldwide. This study evaluates the effect of power variation in brain Photobiomodulation (PBM) therapy using a wavelength of 915 nm. This study evaluates the continuous wave (CW) and pulsed wave (PW) modes of laser irradiation using varying numbers of point laser sources (2, 4, and 9) distributed across the head. The pulse wave features include a frequency of 100 Hz, a duty cycle of 50 %, and variable average power levels of 10, 20, 25, 50, and 100 mW. The primary simulation conditions of the brain surface temperature and room temperature were set to 37 °C and 24 °C, respectively. The evaluation was performed by calculating the Pennes bioheat equation to determine the time-dependent tissue temperature response during laser irradiation. Power doses were also calculated after determining each layer’s fluence rate and total energy flux. The results indicate that using two, four, or nine laser sources with an average power of 10 mW is suitable for brain PBM therapy. The three laser configurations achieve sufficient energy flux distribution in the brain (GM, WM) while maintaining the skin temperature at 37 °C at lower power levels. This research confirms that two laser sources (915 nm) deliver the required therapeutic dose across the head for Alzheimer’s patients without causing thermal side effects.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105860"},"PeriodicalIF":3.1,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826466","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

Study on anti-infrared/millimeter wave smoke material and its attenuation performance 抗红外/毫米波烟雾材料及其衰减性能研究

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-10 DOI: 10.1016/j.infrared.2025.105852

Yin-Chiung Chang , Kuo-Hui Wu , Wen-Chien Huang , Tsung-Han Yang

{"title":"Study on anti-infrared/millimeter wave smoke material and its attenuation performance","authors":"Yin-Chiung Chang , Kuo-Hui Wu , Wen-Chien Huang , Tsung-Han Yang","doi":"10.1016/j.infrared.2025.105852","DOIUrl":"10.1016/j.infrared.2025.105852","url":null,"abstract":"<div><div>A composite based on magnetic iron particles and expanded graphite was prepared by thermal combustion and blending methods. Far infrared (8–14 μm) and 8 mm (35 GHz) millimeter wave were selected as attenuation objects. The attenuation performance of magnetic expanded graphite (MEG) composites on infrared/millimeter wave (IR/MMW) was tested by static tests using rubber specimens and dynamic tests by using MEG composites in smoke box. The effects of structure, media material type (carbonyl iron powder and Fe<sub>3</sub>O<sub>4</sub>) and weight ratio on the IR/MMW attenuation performance of MEG composites were also studied. The experimental results show that the attenuation ratio of MEG composites to IR/MMW in film is 80.3–87.0 %/93.0–99.6 %, respectively. In addition, MEG composites are used as smoke materials for smoke bomb and sprayed into the air to cover a target. As a result, the surface temperature of the target dropped significantly from 79.5 °C to 34.5 °C. The results show that MEG composites have excellent IR and MMW interference capabilities, and can be used as a new material for anti-IR/MMW smoke material.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105852"},"PeriodicalIF":3.1,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823979","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

Wavelet transform based post processing approach for pulse compression favourable frequency modulated thermal wave imaging for non-destructive testing and evaluation 基于小波变换的脉冲压缩有利频率调制热波成像后处理方法，用于无损检测和评估

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-10 DOI: 10.1016/j.infrared.2025.105843

Priyanka Das , Vanita Arora , Ravibabu Mulaveesala

{"title":"Wavelet transform based post processing approach for pulse compression favourable frequency modulated thermal wave imaging for non-destructive testing and evaluation","authors":"Priyanka Das , Vanita Arora , Ravibabu Mulaveesala","doi":"10.1016/j.infrared.2025.105843","DOIUrl":"10.1016/j.infrared.2025.105843","url":null,"abstract":"<div><div>InfraRed Thermography (IRT) for Non-Destructive Testing and Evaluation (NDT&E) is used across various industries to inspect components and structures to detect and identify the hidden defects in them. Since Thermal NDT&E (TNDT&E) captures the surface conditions remotely within a reasonable time, several inspection and predictive maintenance programs have employed challenging traditional computer vision algorithms to detect surface and subsurface defects in various materials. In this work, a Glass Fibre Reinforced Polymer (GFRP) sample having artificially simulated flat-bottom holes at various depths was examined with the Frequency Modulated Thermal Wave Imaging (FMTWI) technique. The thermal data acquired using FMTWI for the sample contains various environmental and experimentally generated noises. Principal Component Thermography (PCT) using Singular Value Decomposition (SVD) has been carried out to qualitatively enhance the spatial thermal contrast that simultaneously provides temporal thermal profiles with reduced dynamic range. Pulse Compression on the obtained PCT sequence using the cross-correlation approach improves the range resolution of the subsurface defects. Wavelet transforms like Haar, Mexican Hat, and Morlet are applied to the frames within the half-width region of the main lobe in pulse-compressed signal to study their effect on defect detection capabilities and visualize the Region of Interest (RoI), specifically the circular defect region within the material. The novel thermal pattern enhancement method extends IRT-based Automated Defect Recognition (ADR) for more precise defect-detection and localization particularly for GFRP structures, which are mostly used in aerospace and shipbuilding industries.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105843"},"PeriodicalIF":3.1,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826465","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