Optics and Laser Technology最新文献_第2页

Thermomechanical coupled modeling and microstructural solidification mechanism of IN625 alloy in multi-track multi-layer laser directed energy deposition IN625合金多道激光定向能沉积的热-力学耦合建模及显微组织凝固机理

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113925

Xuanyu Zheng , Jingbin Hao , Yiyang Liu , Haiyu Liu , Hao Liu , Haifeng Yang

{"title":"Thermomechanical coupled modeling and microstructural solidification mechanism of IN625 alloy in multi-track multi-layer laser directed energy deposition","authors":"Xuanyu Zheng , Jingbin Hao , Yiyang Liu , Haiyu Liu , Hao Liu , Haifeng Yang","doi":"10.1016/j.optlastec.2025.113925","DOIUrl":"10.1016/j.optlastec.2025.113925","url":null,"abstract":"<div><div>To investigate the multi-track, multi-layer forming mechanism of IN625 alloy during laser directed energy deposition (LDED), a thermomechanical coupled numerical model was developed based on Fluent, and the accuracy of the model was verified through experiments. The study investigated the influence of key process parameters on melt pool dynamics, morphology, and temperature field evolution. The melt pool development was divided into four stages: initial, expansion, equilibrium, and decay. Simulation results indicated that a 35 % overlap ratio yields optimal morphology and thermal uniformity while minimizing geometric deviation. Introducing a 3-second interlayer pause time significantly reduced peak temperature and thermal gradients, thereby reducing defects caused by thermal accumulation. By analyzing temperature gradients G, growth rate R, cooling rate G × R, and morphology factor G/R along the build direction, the solidification behavior was further elucidated. Experimental results confirmed the correlation between solidification parameters and grain morphology, showing a transition from fine equiaxed grains at the top to coarse columnar structures at the bottom. This study provides important basis for optimizing LDED process parameters and predicting the morphology and performance of high-performance nickel-based alloy components.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113925"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Perceptual region-driven infrared-visible co-fusion for extreme scene enhancement 极端场景增强的感知区域驱动红外-可见光融合

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-11 DOI: 10.1016/j.optlastec.2025.113870

Jing Tao , Yonghong Zong , Banglei Guan , Pengju Sun , Taihang Lei , Yang Shang , Qifeng Yu

{"title":"Perceptual region-driven infrared-visible co-fusion for extreme scene enhancement","authors":"Jing Tao , Yonghong Zong , Banglei Guan , Pengju Sun , Taihang Lei , Yang Shang , Qifeng Yu","doi":"10.1016/j.optlastec.2025.113870","DOIUrl":"10.1016/j.optlastec.2025.113870","url":null,"abstract":"<div><div>In photogrammetry, accurately fusing infrared (IR) and visible (VIS) spectra while preserving the geometric fidelity of visible features and incorporating thermal radiation is a significant challenge, particularly under extreme conditions. Existing methods often compromise visible imagery quality, impacting measurement accuracy. To address this, we propose the perceptual region-driven co-fusion (PRCF) framework, which integrates multi-exposure and multi-modal imaging using a space-variant exposure (SVE) camera. PRCF co-fuses multi-modal and multi-exposure data, overcoming limitations of single-exposure methods in extreme environments. The PRCF framework begins with region perception-based feature fusion to ensure precise multi-modal registration, followed by adaptive fusion with contrast enhancement. A structural similarity compensation mechanism, guided by regional saliency maps, optimizes IR-VIS spectral integration. Moreover, PRCF adapts to single-exposure scenarios for robust fusion across diverse conditions. Experiments conducted on both synthetic and real-world data demonstrate that PRCF achieves superior image clarity and improved performance compared to state-of-the-art methods, as evidenced by both quantitative and visual evaluations.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113870"},"PeriodicalIF":5.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Method for improving the accuracy of the 3D morphology measurement of ultra-high temperature digital image correlation based on laser projection speckle 提高基于激光投影散斑的超高温数字图像相关三维形貌测量精度的方法

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-10 DOI: 10.1016/j.optlastec.2025.113815

Wanlin Pan , Shengzhi Tao , Junrui Li , Huanqing Wang , Yonghong Wang

{"title":"Method for improving the accuracy of the 3D morphology measurement of ultra-high temperature digital image correlation based on laser projection speckle","authors":"Wanlin Pan , Shengzhi Tao , Junrui Li , Huanqing Wang , Yonghong Wang","doi":"10.1016/j.optlastec.2025.113815","DOIUrl":"10.1016/j.optlastec.2025.113815","url":null,"abstract":"<div><div>Ultra-high temperature environments pose significant challenges to high-temperature digital image correlation for 3D morphology reconstruction, including speckle oxidation, thermal radiation, and thermal flow disturbance. This study proposes an improved method for enhancing the accuracy of ultra-high temperature 3D morphology measurement based on laser projection speckle. A laser projection system is designed to generate optimal speckle patterns by precisely controlling device parameters. Two techniques are introduced to mitigate thermal radiation interference and improve measurement accuracy under non-vacuum ultra-high temperature conditions: (1) an image optimization method that combines dark channel prior and multi-scale retinex, and (2) a multilevel wavelet smoothing algorithm for point cloud field optimization. These methods effectively suppress background radiation, yielding high-quality speckle images at 1200 °C and reducing noise and voids caused by thermal flow disturbance. Ultra-high temperature 3D morphology measurement was conducted on a custom quartz glass workpiece, demonstrating significant improvements in point cloud field completeness and smoothness. Compared with those of a commercial coordinate measuring machine, the relative errors in key point measurements were reduced by 3.12 % and 5.45 %, respectively, when the introduced techniques were used, confirming the effectiveness of the proposed approach.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113815"},"PeriodicalIF":5.0,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

CLIPViC: Efficient decoupling inference strategy for HOI detection with contrastive language-image pre-training guidance CLIPViC：基于对比语言图像预训练指导的HOI检测的高效解耦推理策略

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-09 DOI: 10.1016/j.optlastec.2025.113803

Guxue Gao , Hutuo Quan , Yang Xiao , Xiaopeng Wen , Yuanyuan Wang

{"title":"CLIPViC: Efficient decoupling inference strategy for HOI detection with contrastive language-image pre-training guidance","authors":"Guxue Gao , Hutuo Quan , Yang Xiao , Xiaopeng Wen , Yuanyuan Wang","doi":"10.1016/j.optlastec.2025.113803","DOIUrl":"10.1016/j.optlastec.2025.113803","url":null,"abstract":"<div><div>The goal of Human-Object Interaction (HOI) is to recognize human-object pairs in images and predict their actions. Although existing two-stage methods have made significant progress in human interaction, they still face challenges such as the lack of robust interaction information in features extracted from object detector and insufficient research on zero-shot learning. To address these issues, in this paper, we propose a novel two-stage method (CLIPViC) that adopts an effective decoupling inference strategy for HOI guided by a Contrastive Language-Image Pre-training (CLIP). The method designs a dual-branch structure of CLIP and predictive visual context (PViC) models. PViC features undergo refinement, while the CLIP image encoder provides robust and discriminative global features. Cross-attention then aggregates interactions between the global features from both branches. Considering that the global features of PViC and CLIP are modeled by CNN and Transformer, respectively, an effective decoupling inference strategy (i.e. independent training and joint inference) is proposed to fully combine the advantages of Transformer and CNN modeling. Aiming at the under-researched problem of zero-sample inference for two-stage methods, a comprehensive exploration of zero-sample inference for two-stage methods is conducted, and the action text embedding of CLIP is proposed as a classifier for zero-sample inference of unseen actions in HOI. The experimental results show that the largest CLIPViC model achieves the best accuracy of 48.02% mAP on the HICO-DET dataset and a competitive 69.4% mAP on the V-COCO dataset, while the model can better predict unseen actions of HOI with high model generalization and migration ability.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113803"},"PeriodicalIF":5.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Non-uniform Fourier domain stretching method for ultra-wide-angle wave propagation 超广角波传播的非均匀傅立叶域拉伸法

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-08 DOI: 10.1016/j.optlastec.2025.113876

Tomasz Kozacki, Moncy S. Idicula, Juan Martinez-Carranza, Maksymilian Chlipala, Rafal Kukolowicz

{"title":"Non-uniform Fourier domain stretching method for ultra-wide-angle wave propagation","authors":"Tomasz Kozacki, Moncy S. Idicula, Juan Martinez-Carranza, Maksymilian Chlipala, Rafal Kukolowicz","doi":"10.1016/j.optlastec.2025.113876","DOIUrl":"10.1016/j.optlastec.2025.113876","url":null,"abstract":"<div><div>Numerical inspection of wide-angle (WA) or ultra-wide-angle (UWA) computer-generated holograms (CGH) is a computationally demanding task. To surpass this limitation, we propose a novel computational approach for fast and accurate WA-CGH reconstruction based on Fast Fourier transform Fresnel diffraction (FrT) and non-uniform frequency hologram magnification. This novel algorithm is referred to as the Non-Uniform Fourier Domain Stretching (NU-FDS) method. It is based on approximating a spherical wave coming from any object point with a parabolic wave, with the points of convergence of the two waves being different. It is supported by a mathematical solution developed using phase-space to determine the frequency distribution needed to find the distribution of non-uniform magnification. It corrects the axial distance of a parabolic wave so the FrT solution can be applied for WA-CGH reconstruction. Finally, the NU-FDS method provides a fast and accurate quantitative assessment of WA or UWA CGH. The algorithm also allows the reconstruction of a partial view of any location, reducing computation time. The presented evidence shows that the NU-FDS algorithm can accurately and efficiently reconstruct large and highly detailed 3D objects from WA and UWA CGH of FoV and resolution up to 120° and 16 K, respectively.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113876"},"PeriodicalIF":5.0,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Compact and scalable cascaded AWG with periodic WDM functionality for optical communications 紧凑型和可扩展级联AWG，具有周期性WDM功能，用于光通信

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-08 DOI: 10.1016/j.optlastec.2025.113891

Xin Tang, Jie Cheng, Ke Zeng, Xinyu Ouyang, Yu Zheng

{"title":"Compact and scalable cascaded AWG with periodic WDM functionality for optical communications","authors":"Xin Tang, Jie Cheng, Ke Zeng, Xinyu Ouyang, Yu Zheng","doi":"10.1016/j.optlastec.2025.113891","DOIUrl":"10.1016/j.optlastec.2025.113891","url":null,"abstract":"<div><div>Arrayed waveguide gratings (AWGs) serve as fundamental components in the field of optical communications, where rapid technological advancements continue to drive demand for innovative applications. One notable challenge is achieving superior optical performance in AWGs while incorporating periodic wavelength division multiplexing (WDM) functionality for optical signals. Based on a silica material platform, we have designed and fabricated a 1 × 16 cascaded AWG suitable for optical communication systems, which comprises one coarse primary AWG and four dense sub-AWGs. We optimized the optical performance through structures such as spot size converter (SSC), multi-mode interference coupler (MMI), and multi-mode waveguides, resulting in a compact layout of 17.5 mm × 20 mm. Experimental results indicate that the cascaded AWG proposed in this paper can effectively achieve periodic WDM functionality for optical signals. The measured insertion loss (IL), insertion loss uniformity (ILU), adjacent channel crosstalk (ACXT), central wavelength deviation (CWLD), and 1 dB bandwidth (1 dB BW) of the tested output channels are 12.47 dB, 0.43 dB, 17.68 dB, 0.14 nm, and 0.23 nm, respectively. The findings presented in this paper are scalable and hold promising application prospects, providing a viable technical solution for implementing periodic WDM functionality on AWGs and possessing potential engineering value for the advancement of optical communication technologies.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113891"},"PeriodicalIF":5.0,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Time-resolved analysis of carbon monoxide emissions from vehicles using a quartz-enhanced photoacoustic sensor 利用石英增强光声传感器对车辆一氧化碳排放进行时间分辨分析

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-08 DOI: 10.1016/j.optlastec.2025.113879

Mariagrazia Olivieri , Andrea Zifarelli , Angelo Sampaolo , Vincenzo Spagnolo , Pietro Patimisco

{"title":"Time-resolved analysis of carbon monoxide emissions from vehicles using a quartz-enhanced photoacoustic sensor","authors":"Mariagrazia Olivieri , Andrea Zifarelli , Angelo Sampaolo , Vincenzo Spagnolo , Pietro Patimisco","doi":"10.1016/j.optlastec.2025.113879","DOIUrl":"10.1016/j.optlastec.2025.113879","url":null,"abstract":"<div><div>Low-cost sensors networks hold the promise of dense spatial mapping over wide areas, through a combination of its price point and transportability, with a fine spatial reconstruction of the pollutants. Their reliability and the limited performance, particularly at finer temporal resolutions, represents the other side of coin. These shortcomings in dynamic environments pose serious challenges for their use in exposure studies and mobile applications. A recommendation for careful calibration, strategic experimental design, and an emphasis on high temporal resolution use cases are essential for guiding future technological development without losing key features, such as portability and compactness. In this work, we used a Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS)-based sensor for sequentially measuring carbon monoxide (CO), nitrous oxide (N<sub>2</sub>O), and water vapor emissions near vehicle exhaust pipes. With detection limits of 150 ppb for N<sub>2</sub>O and 91 ppb for CO, this sensor allows for precise emission measurements. Moreover, the 300 ms temporal resolution enables real-time tracking of emission variations with a detailed temporal analysis. Field tests at the University of Bari Campus parking area confirmed the sensor capability to capture CO concentration fluctuations from both idling and moving vehicles.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113879"},"PeriodicalIF":5.0,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Adaptive wavelength interpolation based high signal-to-noise ratio 3D fringe projection profilometry under ambient light interference 环境光干扰下基于自适应波长插值的高信噪比三维条纹投影轮廓法

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-07 DOI: 10.1016/j.optlastec.2025.113865

Liying Zhang , Jinge Guan , Yongqiu Zheng , Miao Ma , Nan Li , Chenyang Xue

{"title":"Adaptive wavelength interpolation based high signal-to-noise ratio 3D fringe projection profilometry under ambient light interference","authors":"Liying Zhang , Jinge Guan , Yongqiu Zheng , Miao Ma , Nan Li , Chenyang Xue","doi":"10.1016/j.optlastec.2025.113865","DOIUrl":"10.1016/j.optlastec.2025.113865","url":null,"abstract":"<div><div>Fringe projection profilometry (FPP) is a widely used non-contact 3D measurement method known for its high accuracy and response. However, its performance is highly susceptible to ambient light interference, which can significantly degrade fringe contrast and reduce reconstruction accuracy. In this study, a high signal-to-noise ratio 3D fringe projection profilometry via adaptive wavelength interpolation is proposed. Two wavelength channels are selected for image acquisition, and an adaptive interpolation algorithm is employed to fuse the spectral information, effectively suppressing the impact of ambient noise on 3D reconstruction. In addition, a corresponding system was designed and is used to conduct under ambient illuminance noise levels ranging from 700 lux to 1.6 × 10<sup>4</sup> lux. The results showed that the traditional method is unable to accomplish reconstruction under strong noise interference. In contrast, the proposed method consistently demonstrated superior anti-noise performance across a wide range of ambient noise levels. The interpolation factor is closely related to reconstruction accuracy and optimal performance, as further analysis reveals. The developed system features a lightweight and shock-resistant design, supporting its potential for practical deployment.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"192 ","pages":"Article 113865"},"PeriodicalIF":5.0,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Coherent mobile optical fronthaul with source-free remote units and analog phase noise cancellation 具有无源远程单元和模拟相位噪声消除的相干移动光前传

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-06 DOI: 10.1016/j.optlastec.2025.113689

Miquel Masanas , Rodrigo Méndez , Víctor Polo , Juan C. Velásquez , María C. Santos , Josep Prat

引用次数: 0

All-optical polarization inversion in LiNbO3 crystal by two-step illumination using near-infrared femtosecond pulses 近红外飞秒脉冲两步照射下LiNbO3晶体的全光偏振反演

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-09-06 DOI: 10.1016/j.optlastec.2025.113872

Xin Chen , Zhou Li , Gordon Han Ying Li , Huan Chen , Junli Wang , Yan Sheng

引用次数: 0