Optics and Lasers in Engineering最新文献_第3页

Corrigendum to “High-speed temporal optical signal detection in turbid media using lensless single random phase encoding” [Optics and Lasers in Engineering, Volume 188, May 2025, 108911] “在浑浊介质中使用无透镜单随机相位编码的高速时间光信号检测”的勘误表[光学与激光工程，vol . 188, May 2025, 108911]

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-01 DOI: 10.1016/j.optlaseng.2025.108969

Gregory Aschenbrenner, Rakesh Joshi, Yinuo Huang, Bahram Javidi

引用次数: 0

Underwater image enhancement based on the interaction of global and local features 基于全局和局部特征交互作用的水下图像增强

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-30 DOI: 10.1016/j.optlaseng.2025.109044

Lingyu Li , Zhiyong Tao , Sen Lin , Yu Yang

{"title":"Underwater image enhancement based on the interaction of global and local features","authors":"Lingyu Li , Zhiyong Tao , Sen Lin , Yu Yang","doi":"10.1016/j.optlaseng.2025.109044","DOIUrl":"10.1016/j.optlaseng.2025.109044","url":null,"abstract":"<div><div>Due to the light absorption and light scattering phenomena caused by the complex underwater environment, underwater images often suffer from quality degradation problems such as detail blurring and color distortion, which seriously affects the effectiveness of the images in applications such as identification and detection. An underwater image enhancement model is proposed, based on the interaction of global and local (GAL) features. This model aims to overcome the limitations of convolutional structures in feature extraction and to enhance the visual quality of underwater images. Firstly, to address the inadequacy of the convolutional structure in image global feature extraction, a multi-axis self-attention mechanism is introduced to enhance the global feature extraction capability of the model. Then, we employed a multi-scale pyramid structure as a local feature extraction block to thoroughly capture image local features from different scales. Finally, a cross-scale feature interaction block is designed to integrate feature information from different scales and to achieve effective interaction between global and local features, employing the fast Fourier convolution. The experimental results, conducted on the EUVP, UFO, and UIEB datasets, verify the significant advantages of our algorithm over other comparative algorithms in terms of color restoration and detail enhancement. These advantages are demonstrated with more prominent effects in practical application scenarios.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109044"},"PeriodicalIF":3.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust structured light measurement for large freeform surfaces 大型自由曲面的坚固结构光测量

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-30 DOI: 10.1016/j.optlaseng.2025.109036

Ping Song , Wuyang Zhang , Chuangbo Hao , Yunjian Bai , Haocheng Geng

{"title":"Robust structured light measurement for large freeform surfaces","authors":"Ping Song , Wuyang Zhang , Chuangbo Hao , Yunjian Bai , Haocheng Geng","doi":"10.1016/j.optlaseng.2025.109036","DOIUrl":"10.1016/j.optlaseng.2025.109036","url":null,"abstract":"<div><div>Structured light has shown substantial potential on large freeform surfaces measurements. However, existing methods encounter challenges associated with inaccurate initial pose estimation and cumulative errors in large-scale reconstructions. This paper introduces a robust automated measurement framework to address these issues. Initially, a structured light scanning platform is constructed to scan the target surface and acquire local point clouds. Subsequently, an initial pose optimization method based on a correction model is proposed to ensure high-quality initial poses for the local point clouds. Finally, a global registration method combining an improved graph optimization algorithm with the ICP (Iterative Closest Point) algorithm is introduced, enabling high-accuracy multi-frame registration and global optimization. Extensive experimental validations have been conducted. Compared to traditional methods, our approach reduces the RMSE (Root Mean Squared Error) from 1.43 mm to 0.93 mm, translation error from 0.98 mm to 0.53 mm, and rotation error from 0.21 degrees to 0.13 degrees. We believe that this study could provide a promising direction for achieving highly robust and accuracy 3D measurement over large areas.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109036"},"PeriodicalIF":3.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Blind source separation-based reconstruction algorithm of air bubbles holograms 基于盲源分离的气泡全息图重建算法

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-28 DOI: 10.1016/j.optlaseng.2025.109023

Jamel Hattay , Sébastien Coëtmellec , Samir Belaid , Denis Lebrun , Marc Brunel

{"title":"Blind source separation-based reconstruction algorithm of air bubbles holograms","authors":"Jamel Hattay , Sébastien Coëtmellec , Samir Belaid , Denis Lebrun , Marc Brunel","doi":"10.1016/j.optlaseng.2025.109023","DOIUrl":"10.1016/j.optlaseng.2025.109023","url":null,"abstract":"<div><div>This article aims firstly to review some results on two-dimensional air bubble modeling necessary when calculating in-line holograms for such objects. Secondly, the blind source separation method (BSS) applied to estimate the most probable shape of the object that generates the holograms either theoretically or experimentally is recalled. The result of this study demonstrates that the opaque ring is the most probable theoretical model to simulate the hologram of bubbles and also to interpret the reconstructed images. Indeed, in <span><span>[1]</span></span>, the opaque ring was a theoretical hypothesis. After the probabilistic method of this study, the theoretical hypothesis is validated and we can confirm the convergence of two methods (theoretical and probabilistic). Besides, we show that BSS is an interesting method for discriminating between opaque objects (e.g. a perfectly absorbing particle) and the symmetry of a revolution phase object. Finally, a note is made on the possibility of estimating the optical index of the bubble, which constitutes a perspective of this initial work.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109023"},"PeriodicalIF":3.5,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143881986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pre-frequency-shift method for random number coding Phi-OTDR lightweight demodulation 随机数字编码的预频移法Phi-OTDR轻量解调

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-27 DOI: 10.1016/j.optlaseng.2025.109025

Peihong Li , Kaixin Liu , Junchan Li , Yangxu Wu , Xiaojie Zhao , Ping Chen

{"title":"Pre-frequency-shift method for random number coding Phi-OTDR lightweight demodulation","authors":"Peihong Li , Kaixin Liu , Junchan Li , Yangxu Wu , Xiaojie Zhao , Ping Chen","doi":"10.1016/j.optlaseng.2025.109025","DOIUrl":"10.1016/j.optlaseng.2025.109025","url":null,"abstract":"<div><div>Pulse coding technology can effectively improve the performance of the phase-sensitive optical time domain reflectometry (Phi-OTDR) system, but the cross-correlation decoding for mass data along a long sensing distance brings a lengthy extra time cost. In this paper, a pre-frequency-shift method is proposed for the lightweight demodulation in the random number coding Phi-OTDR system. By using the first-order sideband generated by the phase modulation, this method can effectively reduce the frequency of the beating signal, thus reducing the requirement of the data sampling rate. The principle of the cross-correlation decoding algorithm based on sequence interpolation is studied, and the extra computation caused by the cross-correlation operation is analyzed theoretically. In the experiment, the validity of the pre-frequency-shift scheme is verified, and the sampling rate of the system is reduced from 500 MSps to 100 MSps. Comparative experiments using conventional down-sampling techniques with sampling rates of 250 MSps, 125 MSps, and 60 MSps validate the superiority of the proposed method. Finally, the vibrations of different frequencies are successfully located at 62.24 km with a spatial resolution of 5 m. At this distance, the algorithmic time cost of the proposed method is only 13.28 % of that of the traditional scheme.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109025"},"PeriodicalIF":3.5,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of multi-longitudinal-mode incoherent doppler wind lidar with quadri-channel mach–zehnder interferometer 四通道马赫曾德尔干涉仪多纵模非相干多普勒风激光雷达优化

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-25 DOI: 10.1016/j.optlaseng.2025.109035

Fengjia Gao , Fei Gao , Li Wang , Yuehui Song , Dengxin Hua , Griša Močnik , Samo Stanič

{"title":"Optimization of multi-longitudinal-mode incoherent doppler wind lidar with quadri-channel mach–zehnder interferometer","authors":"Fengjia Gao , Fei Gao , Li Wang , Yuehui Song , Dengxin Hua , Griša Močnik , Samo Stanič","doi":"10.1016/j.optlaseng.2025.109035","DOIUrl":"10.1016/j.optlaseng.2025.109035","url":null,"abstract":"<div><div>Multi-longitudinal-mode (MLM) high-spectral-resolution lidar is a new concept of incoherent Doppler wind lidar (IDWL), which can avoid the complex techniques of seed injection as well as the high requirement of frequency stabilization and frequency locking. To achieve high-precision atmospheric wind measurement, an optimized design is performed for the MLM IDWL, which utilizes a free-running MLM laser as the excitation light source and a quadri-channel Mach-Zehnder interferometer (QMZI) as the spectral discriminator. Based on the partial coherence theory of quasi-monochromatic light interference, the data inversion algorithms for MLM IDWL are simplified, and the performance evaluation parameters for MLM IDWL are analyzed. Furthermore, using the control variable method, the key parameters of MLM IDWL are optimized by discussing its performance evaluation parameters in the condition of aerosol Mie scattering or molecular Rayleigh scattering, respectively. The simulation experiments of wind measurement with the optimal key parameters prove that the MLM IDWL can realize the atmospheric wind measurement with an accuracy of 0.3 m/s in the low-altitude environments using aerosol Mie scattering echo signals and with an accuracy of 3.0 m/s in the high-altitude environments using molecular Rayleigh scattering echo signals.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109035"},"PeriodicalIF":3.5,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance evaluation of multi-wavelength visible light underwater optical communication 多波长可见光水下光通信性能评价

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-24 DOI: 10.1016/j.optlaseng.2025.109026

Shofuro Afifah , Jun-Kai Wei , Lina Marlina , Shien-Kuei Liaw , Pei-Jun Lee , Chien-Hung Yeh

{"title":"Performance evaluation of multi-wavelength visible light underwater optical communication","authors":"Shofuro Afifah , Jun-Kai Wei , Lina Marlina , Shien-Kuei Liaw , Pei-Jun Lee , Chien-Hung Yeh","doi":"10.1016/j.optlaseng.2025.109026","DOIUrl":"10.1016/j.optlaseng.2025.109026","url":null,"abstract":"<div><div>A multi-wavelength underwater wireless optical communication (UWOC) was experimented and studied. The multi-wavelength 450 nm, 518 nm, and 655 nm laser source was used to transmit information in the underwater-air medium up to 17-meter. The data rate used in this study was up to 2.5 Gbps. The optical loss in the 450 nm, 518 nm, and 655 nm in water per meter were 0.55 dB, 0.56 dB, and 0.69 dB, respectively. Several environmental effects such as turbulence and temperature changes were investigated. The bit error rate (BER) value of red, green, and blue-laser can achieve up to <span><math><mrow><mn>2.1</mn><mspace></mspace><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>5</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>3.1</mn><mspace></mspace><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>1.7</mn><mspace></mspace><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>12</mn></mrow></msup></mrow></math></span>, respectively under turbulence influence. The laser beam is diverged due to wave and floating bubbles under turbulence influences, especially using a 655 nm red-laser diode. A temperature change did not significantly change the BER value as the turbulence did. The multi-wavelength 450 nm, 518 nm, and 655 nm laser source can achieve bit error rate (BER) under the forward error correction (FEC) limit. This study can further improve the researcher design of their UWOC system for various applications.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109026"},"PeriodicalIF":3.5,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Passive non-line-of-sight pedestrian imaging based on light transport matrix decomposition 基于光传输矩阵分解的被动非视线行人成像

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-24 DOI: 10.1016/j.optlaseng.2025.109032

Mingyang Chen , Jiyue Wang , Mengge Liu , Ziqin Xu , Hao Liu , Mingliang Xu

{"title":"Passive non-line-of-sight pedestrian imaging based on light transport matrix decomposition","authors":"Mingyang Chen , Jiyue Wang , Mengge Liu , Ziqin Xu , Hao Liu , Mingliang Xu","doi":"10.1016/j.optlaseng.2025.109032","DOIUrl":"10.1016/j.optlaseng.2025.109032","url":null,"abstract":"<div><div>Passive non-line-of-sight (NLOS) imaging extends the observer's perceptual range, offering promising applications in fields such as autonomous driving and emergency rescue. However, mainstream passive NLOS imaging methods are generally limited to distances of less than 6 meters and often rely on a single simulated light transmission matrix, overlooking brightness and reflection characteristics. To overcome these limitations, we employ an infrared camera to capture relayed signals from long distances and introduce the NLOS Pedestrian Imaging Algorithm based on Light Transport Matrix Decomposition (NLOS-LTMD). This innovative algorithm simulates the light transport matrix in two parts: an illumination transport matrix for reconstructing brightness and a reflection transport matrix for enhancing contours. In addition, we propose an Illumination-Oriented Transformer (IO-Transformer) that utilizes threshold segmentation to identify the most informative regions based on the intensity of illumination information addressing the issue of introducing noise and low-SNR regions during contextual modeling, which can degrade imaging quality. Quantitative and qualitative experiments demonstrate that NLOS-LTMD markedly surpasses existing methods in both robustness and reconstruction quality.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109032"},"PeriodicalIF":3.5,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Resonance-mode-induced beating effect for THz wave generation and principal demonstration 太赫兹波产生的共振模式诱发振荡效应及主要论证

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-23 DOI: 10.1016/j.optlaseng.2025.109018

Deepika Tyagi , Vijay Laxmi , Barkathulla Asrafali , Abida Parveen , Mi Lin , Qiong Wang , Keyu Tao , Qiang Liu , Suling Shen , Zhengbiao Ouyang

{"title":"Resonance-mode-induced beating effect for THz wave generation and principal demonstration","authors":"Deepika Tyagi , Vijay Laxmi , Barkathulla Asrafali , Abida Parveen , Mi Lin , Qiong Wang , Keyu Tao , Qiang Liu , Suling Shen , Zhengbiao Ouyang","doi":"10.1016/j.optlaseng.2025.109018","DOIUrl":"10.1016/j.optlaseng.2025.109018","url":null,"abstract":"<div><div>We present a method of terahertz (THz) wave generation in the complete THz band that harnesses resonance modes within high-quality-factor photonic-crystal resonators. In the proposed method, the input infrared “single-frequency” wave and the resonance mode induced efficiently in the resonator generate a beat note of THz frequency, and the beat note is converted to an independent THz radiation wave with the help of an amplitude demodulator, which provides high power-conversion efficiency (PCE). The theoretical PCE is a 22.93 % half-wave-rectification amplitude demodulator without considering the insertion loss. Through simulations, we demonstrate the feasibility of our approach of inducing a resonance mode from a conventional “single-frequency” wave and using the induced resonance mode to beat with the input source wave with PCE of 24.03 % in agreement with the theoretical PCE value by half-wave-rectification demodulation. Such a high PCE can be obtained only at a certain frequency. The mechanism of the proposed method is further demonstrated experimentally in the microwave band. The proposed method is a general method that can be applied to frequency conversion of all kinds of waves, showcasing its potential across various applications in electronics, optics, acoustics, and beyond. We expect to overcome many future challenges in terahertz technology because of its high efficiency and miniaturization. Furthermore, our findings pave the way for efficient frequency manipulation with broad implications in signal processing, detection, and communication systems.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109018"},"PeriodicalIF":3.5,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-time extend depth of field imaging based on liquid lens and deblur-unet in automated optical inspection 自动光学检测中基于液体透镜和去模糊网的实时扩展景深成像

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-23 DOI: 10.1016/j.optlaseng.2025.109022

Ping Jiang , Ting-Ting Chen , Wen Chen , Si-Yuan Wang

{"title":"Real-time extend depth of field imaging based on liquid lens and deblur-unet in automated optical inspection","authors":"Ping Jiang , Ting-Ting Chen , Wen Chen , Si-Yuan Wang","doi":"10.1016/j.optlaseng.2025.109022","DOIUrl":"10.1016/j.optlaseng.2025.109022","url":null,"abstract":"<div><div>The depth of field is of significant importance in a multitude of imaging systems. It is difficult to balance imaging efficiency and quality. Here, we propose a real-time extended depth of field imaging system based on a liquid lens and Deblur-Unet for automated optical inspection. This method includes calibration, training and real time imaging. In the calibration setup, the liquid lens obtains both focus stack images and a focus scanning image in the same work distance range, and a fused extended depth of field image can be obtained by calculating the sharpness of the focus stack images. In the training setup, the fused extended depth of field image and the focus scanning image will be used to train a deconvolution and denoise Deblur-Unet. In the real time imaging setup, each frame of the focus scanning image obtained by the liquid lens imaging system is processed by the trained Deblur-Unet, and the corresponding extended depth of field image can be obtained. By using the proposed system, we extend the depth of field by >10 times for imaging in online Li-ion battery pole piece flip inspection. The system achieves a frame-rate of up to 50 Hz for 5MP or 20 Hz for 12MP mono images with an RTX 4060 GPU. Furthermore, the concise architecture of the proposed system has the potential to be used in 100MP high resolution and extend depth of field imaging with only one frame sampling, such as in screen inspection or microscopic biological imaging.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109022"},"PeriodicalIF":3.5,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0