Optics and Lasers in Engineering最新文献_第2页

Deep learning-based single-shot lateral shearing interferometry

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-13 DOI: 10.1016/j.optlaseng.2025.109010

Manh The Nguyen , Hyo-Mi Park , Ki-Nam Joo , Young-Sik Ghim

{"title":"Deep learning-based single-shot lateral shearing interferometry","authors":"Manh The Nguyen , Hyo-Mi Park , Ki-Nam Joo , Young-Sik Ghim","doi":"10.1016/j.optlaseng.2025.109010","DOIUrl":"10.1016/j.optlaseng.2025.109010","url":null,"abstract":"<div><div>Lateral shearing interferometry (LSI) is a powerful measurement method for wavefront sensing and optical testing. However, traditional LSI methods often face challenges in terms of complicated system configurations and vibration sensitivity. In this paper, we propose a novel approach that leverages deep learning to enable single-shot LSI for surface measurement. In our LSI system, the <em>x</em>- and <em>y</em>-directional shearing modules are attached together and a polarization grating and a polarization camera are utilized to obtain a single composite interferogram, which is the summation of the <em>x</em>- and <em>y</em>-directional shearing interferograms. Deep learning is then employed to accurately obtain the <em>x</em>- and <em>y</em>-phases (which are directly related to the surface slope) from the single composite interferogram, significantly reducing the effect of vibration and improving the robustness of the measurements. We trained a deep learning network using training data obtained from a deformable mirror so that the trained network knows how to retrieve the <em>x</em>- and <em>y</em>-phases from a single composite interferogram. We demonstrate the effectiveness of our approach through experimental measurement of different surfaces ranging from simple concave to complex random surfaces, and show that our deep learning-based LSI enables single-shot and even dynamic surface measurement. This work opens new avenues for the application of artificial intelligence in LSI to enable high-speed and dynamic measurement of specular surfaces.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109010"},"PeriodicalIF":3.5,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823636","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

High-quality binary amplitude hologram generation for digital micromirror device based holographic display

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-12 DOI: 10.1016/j.optlaseng.2025.108994

Alejandro Velez-Zea, César Antonio Hoyos-Peláez, John Fredy Barrera-Ramírez

引用次数: 0

Super-resolution of photoelastic polarization images using a neural network and a divide-and-conquer strategy

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-12 DOI: 10.1016/j.optlaseng.2025.108973

Huajian Zhang, Shuhai Jia, Mengyu Han, Zihan Lin, Longning Wang, Bo Wen

{"title":"Super-resolution of photoelastic polarization images using a neural network and a divide-and-conquer strategy","authors":"Huajian Zhang, Shuhai Jia, Mengyu Han, Zihan Lin, Longning Wang, Bo Wen","doi":"10.1016/j.optlaseng.2025.108973","DOIUrl":"10.1016/j.optlaseng.2025.108973","url":null,"abstract":"<div><div>The use of polarization cameras in digital photoelasticity has become increasingly prevalent, significantly contributing to the advancement of digital photoelasticity. However, polarization images captured by polarization cameras suffer from resolution loss, which severely affects the accuracy of the isochromatics and isoclinics. Therefore, it is essential to enhance the resolution of these polarization images. In this study, a super-resolution reconstruction network specifically designed for photoelastic polarization images is proposed for the first time. A large dataset was generated and collected to support the development of this network. Additionally, a divide-and-conquer strategy is introduced to avoid interference between the different degradation models. This strategy also enables the efficient acquisition of tens of thousands of real-world datasets. Comparative experiments demonstrate that the proposed divide-and-conquer strategy significantly enhances the network's accuracy. In comparison with interpolation methods and existing networks, the proposed network consistently outperforms them, showing superior performance. This network effectively increases the resolution of photoelastic polarization images, leading to more accurate isochromatics and isoclinics.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 108973"},"PeriodicalIF":3.5,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820549","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

Reference transmittance method constrained by the system constant for the retrieval of the aerosol extinction coefficient in scanning lidar measurements

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-12 DOI: 10.1016/j.optlaseng.2025.109015

Ruonan Fei, Zheng Kong, Liang Mei

{"title":"Reference transmittance method constrained by the system constant for the retrieval of the aerosol extinction coefficient in scanning lidar measurements","authors":"Ruonan Fei, Zheng Kong, Liang Mei","doi":"10.1016/j.optlaseng.2025.109015","DOIUrl":"10.1016/j.optlaseng.2025.109015","url":null,"abstract":"<div><div>Mie-scattering lidar technique has been widely employed for atmospheric pollution source tracking based on scanning measurements, while it is still difficult to retrieve the aerosol extinction coefficient (AEC) in real-time from the scanning map with high precision and reliability owing to the ill-conditioned lidar equation and the variable atmosphere. This study proposes a novel reference transmittance constrained by the system constant (CSC-RT) method for real-time and accurate inversion in scanning lidar measurements. The CSC-RT algorithm employs a reference transmittance as the input to retrieve the AEC profile of a lidar curve that is challenging to obtain independently. The corresponding system constant is subsequently examined through comparison with neighboring scanning measurements to validate the retrieval results. Besides, long-term experiments have revealed that the temporal variation of the retrieved system constant is highly related to atmospheric conditions, especially the humidity, apart from the power fluctuations of the laser diode. Continuous atmospheric measurements carried out by using a scanning Scheimpflug lidar system in urban area have successfully demonstrated that the proposed algorithm is possible to reliably obtain the AEC scanning map for pollution source identification and tracking, and a good correlation between the obtained AEC values and particulate concentrations reported by a local pollution monitoring station has also been found. This method offers a robust and efficient tool for pollution source identification and environmental management, particularly in complex and dynamic atmospheric conditions.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109015"},"PeriodicalIF":3.5,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823638","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

Spatiotemporal synchronized temperature and deformation fields measurement at elevated temperature using a single infrared camera and high-emissivity speckle pattern

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-12 DOI: 10.1016/j.optlaseng.2025.109012

Qiang Qin , Xiaojie Hu , Xuefeng Zou , Liping Yu

{"title":"Spatiotemporal synchronized temperature and deformation fields measurement at elevated temperature using a single infrared camera and high-emissivity speckle pattern","authors":"Qiang Qin , Xiaojie Hu , Xuefeng Zou , Liping Yu","doi":"10.1016/j.optlaseng.2025.109012","DOIUrl":"10.1016/j.optlaseng.2025.109012","url":null,"abstract":"<div><div>The synchronous measurement of temperature and deformation fields using a single infrared camera reduce the complexity of temporal and spatial synchronization between different cameras, making it a versatile approach for thermodynamic studies of materials and structures at temperatures below 150 °C. However, as temperature increases, existing methods encounter challenges such as reduced measurement accuracy of temperature due to the varying emissivity of the sample surface, and decorrelation problem due to the degradation or detachment of the speckle pattern. To address these limitations, we propose an improved method that combines a single infrared camera with stable, high-emissivity, high-temperature-resistant speckles. This method involves pre-applying specialized carriers for temperature and deformation measurements on the sample surface using air plasma spraying (APS) with high-emissivity, high-temperature-resistant materials, such as zirconia ceramics powder. The adaptive threshold binarization and Laplacian interpolation algorithm were employed to extract desired full-field temperature data from the infrared images, while the displacement field was determined through digital image correlation (DIC). The displacement data were then used to retrieve corresponding temperatures at specific calculation points on the surface. The validity and accuracy of the proposed method were verified through experiments, including thermal expansion tests on stainless steel samples subjected to heating by a torch burner and on nickel-based alloy samples under uniform heating using quartz lamps. Owing to its simplicity and cost-effectiveness, the proposed method demonstrates significant potential as a robust and efficient technique for analyzing the thermo-mechanical properties of materials and structures under extreme high temperature environments.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820295","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

Microscopic evolution of polarization across active polarization imaging in turbid medium

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-12 DOI: 10.1016/j.optlaseng.2025.108979

Haoxiang Li , Qiwei Li , Jingping Zhu , Rutai Chen , Jinxin Deng , Fengqi Guo , Jinyong Fang

引用次数: 0

The impact of material properties and surface roughness on coherent detection 材料特性和表面粗糙度对相干检测的影响

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-11 DOI: 10.1016/j.optlaseng.2025.109011

Pengfei Yang, Yanhui Li, Ying Zou, Yi Luo

引用次数: 0

Advanced vortex beam interference system enhanced by CNN for micro-displacement detection

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-11 DOI: 10.1016/j.optlaseng.2025.108987

Tao Yuan , Ji Liu , Jinhui Wu , Yiman Zhang , Yujin Wang , Ning Jing

{"title":"Advanced vortex beam interference system enhanced by CNN for micro-displacement detection","authors":"Tao Yuan , Ji Liu , Jinhui Wu , Yiman Zhang , Yujin Wang , Ning Jing","doi":"10.1016/j.optlaseng.2025.108987","DOIUrl":"10.1016/j.optlaseng.2025.108987","url":null,"abstract":"<div><div>This paper introduces an innovative conjugate vortex beam interference system that significantly enhances micro-displacement measurement capabilities by incorporating a deep learning model for processing and analyzing interference patterns. The theoretical foundation of this system is based on the petal-like interference pattern graduated when two conjugate vortex beams interact, where the rotation of the fringe orientation exhibits a strict linear correlation with displacement. The system fully exploits the sensitivity of vortex beams to minute changes in optical paths, along with the conjugate interference effect, to capture precisely angular variations in the interference pattern. This results in a measurement accuracy better than 0.84 nm across the 0–500 nm range, with a mean absolute error (MAE) approximately 0.5 nm, while achieving sub-nanometer precision across an extensive measurement range. By innovatively applying deep learning to analyze vortex beam interference data, the system effectively utilizes the unique properties of vortex beams alongside the powerful feature learning capabilities of convolutional neural networks (CNNs), enhancing robustness against fringe distortion and noise, thereby improving the accuracy of displacement detection. This method provides an accurate, efficient, and non-contact approach to displacement measurement, showcasing distinct advantages in the precision and stability of micro-displacement assessments.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 108987"},"PeriodicalIF":3.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815773","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

Optimizing blade-tower clearance in large wind turbines: An innovative lidar-based monitoring approach

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-11 DOI: 10.1016/j.optlaseng.2025.109008

Caishi Zhang , Yuan Zhong , Yicheng Sheng , Dingxiang Cao , Zhe Chen

{"title":"Optimizing blade-tower clearance in large wind turbines: An innovative lidar-based monitoring approach","authors":"Caishi Zhang , Yuan Zhong , Yicheng Sheng , Dingxiang Cao , Zhe Chen","doi":"10.1016/j.optlaseng.2025.109008","DOIUrl":"10.1016/j.optlaseng.2025.109008","url":null,"abstract":"<div><div>As wind turbines' generating capacity increases, the turbine blades' size also gradually expands, making controlling the safety distance between the blade tips and the tower particularly important. This paper proposes using a 905 nm wavelength laser to measure the distance between the blade tip and the tower. Three lidar units, each set at different pitch angles, are installed below the nacelle to simultaneously measure the clearance range between the blade tip and the tower. The paper introduces the design parameters of the lidar system, effective signal extraction and data fusion algorithms for the measured data, and corresponding simulation results. Experiments are conducted by installing the newly developed lidar system on a <span><math><mn>9</mn><mspace></mspace><mrow><mi>MW</mi></mrow></math></span> wind turbine. Compared to the imaging processing and millimeter-wave radar detection commonly used in clearance range measurement for most wind turbines, a coefficient of determination (<span><math><msup><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>) of 0.98 indicates a high level of consistency among the different measurement methods. Additionally, lidar provides a cost-effective solution for clearance range monitoring. The results demonstrate that the lidar system can ensure accurate detection of the clearance range, and the measurements can be utilized in the blade control strategy.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109008"},"PeriodicalIF":3.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815774","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

Phase feedback fringe projection profilometry for shiny objects

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-10 DOI: 10.1016/j.optlaseng.2025.109013

Rigoberto Juarez-Salazar , Fabio Vega , Sofia Esquivel-Hernandez , Victor H. Diaz-Ramirez , Andres G. Marrugo

引用次数: 0