Optics and Laser Technology最新文献_第8页

Phase unwrapping based on self-attention dense residual network 基于自关注密集残差网络的相位展开

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113321

Zhongyang Wang , Hongwei Ma , Yuan Chen , Quan Wang

{"title":"Phase unwrapping based on self-attention dense residual network","authors":"Zhongyang Wang , Hongwei Ma , Yuan Chen , Quan Wang","doi":"10.1016/j.optlastec.2025.113321","DOIUrl":"10.1016/j.optlastec.2025.113321","url":null,"abstract":"<div><div>Phase unwrapping, a critical step in obtaining holographic information, plays a significant role in the field of digital holography, particularly in applications such as fringe projection for 3D imaging, synthetic aperture radar, and magnetic resonance imaging. Traditional phase unwrapping algorithms often suffer from error accumulation, high computational costs, and poor performance in low signal-to-noise ratio (SNR) environments. To address these issues, this paper proposes a novel deep learning framework, named as Self-Attention Dense Residual Network (SA-DRNet), for phase unwrapping. To obtain continuous phase, we initially employed a dense network for multiple extractions of phase features. However, to alleviate the phase discontinuities and phase jumps caused by gradient issues, we integrated residual connections within the dense network. Finally, we incorporated a self-attention module to enhance the global phase information restoration, including the background phase, thereby achieving high-precision phase acquisition. Additionally, we established an off-axis digital holographic optical system to capture the holograms of the USAF resolution test target and artificial ink dots. Finally, the robustness of the proposed algorithm under severe noise conditions was first verified through numerical simulations, followed by experimental validation of its effectiveness.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113321"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240250","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-contact quantification of subsurface defects in additive manufacturing via laser ultrasonic Rayleigh wave polarity reversal 利用激光超声瑞利波极性反转对增材制造中亚表面缺陷进行非接触量化

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113309

Huacong Liu , Yiqin Lin , Yangguang Liu , Guoliang Ye , Zhongwen Cheng , Lvming Zeng , Xuanrong Ji

{"title":"Non-contact quantification of subsurface defects in additive manufacturing via laser ultrasonic Rayleigh wave polarity reversal","authors":"Huacong Liu , Yiqin Lin , Yangguang Liu , Guoliang Ye , Zhongwen Cheng , Lvming Zeng , Xuanrong Ji","doi":"10.1016/j.optlastec.2025.113309","DOIUrl":"10.1016/j.optlastec.2025.113309","url":null,"abstract":"<div><div>Selective laser melting (SLM), as an efficient additive manufacturing technique, demonstrates exceptional forming capabilities. However, minor variations in process parameters may induce microstructural alterations that subsequently generate manufacturing defects. This technological limitation underscores the urgent requirement for reliable in-situ monitoring methods to ensure component integrity and optimize processing parameters. In this study, a fully non-contact and efficient inspection method based on all-optical laser ultrasound (LU) is proposed for identifying and quantifying subsurface defects in SLM components. Through finite element simulations, the interaction between Rayleigh wave (R-wave) and subsurface defects was systematically investigated, revealing distinct polarity reversal phenomena during wave-defect interactions. Experimental studies further elucidated the positional dependence of laser excitation relative to defect geometry. As it turned out, when the laser was excited above the edge of the defect, the amplitude of the resulting R-wave was larger than when it was excited in a smaller surrounding area. Based on this amplitude anomaly feature and further combined with the B-scan images, quantitative characterisation of defect location and size is achieved by unilateral and bilateral reception methods, respectively. These findings demonstrate that the method can effectively detect subsurface defects in SLM components and improve the efficiency and resolution of LU detection. The feasibility of LU technology in additive manufacturing quality inspection is further validated and its application in online monitoring of metal additive manufacturing components is promoted.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113309"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240256","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

Color polarization confocal measurement method based on ring-shaped structured light 基于环形结构光的彩色偏振共聚焦测量方法

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113315

Wenyuan Zhou , Yujia Sun , Zhaowu Liu , Wei Wang , Weicheng Wang , Wenhao Li

{"title":"Color polarization confocal measurement method based on ring-shaped structured light","authors":"Wenyuan Zhou , Yujia Sun , Zhaowu Liu , Wei Wang , Weicheng Wang , Wenhao Li","doi":"10.1016/j.optlastec.2025.113315","DOIUrl":"10.1016/j.optlastec.2025.113315","url":null,"abstract":"<div><div>Color confocal displacement measurement (CCM) is a noncontact optical measurement method widely used for nondestructive testing of object surface contours, but the rapid development of manufacturing technologies has imposed stricter requirements on CCM, including integration, higher precision, and higher measurement speeds. Traditional refractive CCM structures are bulky and cannot be integrated, whereas diffractive CCM structures hinder high-speed measurements because of nonlinear dispersion. This article proposes a color polarization confocal measurement method based on ring-shaped structured light (CCRSL), combining binary optics with polarization to achieve integration and high-speed measurements. In addition, two axicon lenses are used to generate ring-shaped structured light and eliminate optical energy loss in the polarization folding system. Modeling is conducted using ZEMAX software and numerical analysis methods to simulate and analyze the CCRSL performance. The resulting linear determination coefficient <em>R</em><sup>2</sup> is 1, the measurement range is 2 mm, the measurement precision is 0.29 um, and the resolution reaches 80 nm. Compared with the traditional method, the length of CCRSL is reduced by 72 % and the resolution is increased by 2.5 times.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113315"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240371","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

Theoretical model of angle-resolved polarized Raman spectroscopy for stress analysis based on coherency matrix 基于相干矩阵的角分辨偏振拉曼光谱应力分析理论模型

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113316

Saisai He, Ying Chang, Bowen Han, Wei Qiu

{"title":"Theoretical model of angle-resolved polarized Raman spectroscopy for stress analysis based on coherency matrix","authors":"Saisai He, Ying Chang, Bowen Han, Wei Qiu","doi":"10.1016/j.optlastec.2025.113316","DOIUrl":"10.1016/j.optlastec.2025.113316","url":null,"abstract":"<div><div>Angle-resolved polarized Raman spectroscopy is extensively used for the decoupling analysis of stress components in semiconductor materials, as well as the identification of crystal orientation and determination of layer numbers in two-dimensional materials. It provides significant advantages for the precise and quantitative characterization of material properties and stress. However, due to the influence of the partially polarized light and the individualized properties of optical components in the Raman optical system, there are discrepancies between the experimental results and the existing theoretical models of angle-resolved polarized Raman spectroscopy. To accurately describe the experimental results using a model, this paper establishes a theoretical model for angle-resolved polarized Raman spectroscopy based on the coherency matrix and Jones matrix method. This model employs the coherency matrix to characterize partially polarized light and introduces calibration parameters to describe the changes of light after passing through optical components, quantitatively analyzing the combined influence of various factors. Consequently, this model can precisely depict the experimental results of angle-resolved polarized Raman spectroscopy and exhibits a more extensive scope of application. Meanwhile, stress analysis is carried out based on the theoretical model to quantitatively analyze the impacts of the individualized parameters of optical components and the changes in polarization degree on the accuracy of stress characterization.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113316"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240379","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

Preparation of near iso-atomic ratio aluminium-based high-entropy alloyed high-performance coatings by laser multiple remelting process 激光多次重熔法制备近等原子比铝基高熵合金高性能涂层

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113285

Guorui Sun , Xinyue Cong , Wenbo Du , Chao Chen

{"title":"Preparation of near iso-atomic ratio aluminium-based high-entropy alloyed high-performance coatings by laser multiple remelting process","authors":"Guorui Sun , Xinyue Cong , Wenbo Du , Chao Chen","doi":"10.1016/j.optlastec.2025.113285","DOIUrl":"10.1016/j.optlastec.2025.113285","url":null,"abstract":"<div><div>The laser remelting process eliminates coating cracks and improves elemental distribution uniformity. Laser clad high-entropy alloy coatings are expected to achieve homogeneous, high-performance aluminum alloy coatings via multiple remelting laser processes. In this work, the combination of laser cladding and multiple remelting processes further optimizes the aluminum alloy coating process and achieves the preparation of high-performance CrMnFeCoNi high-entropy alloy coatings. The 100 μm scanning interval of the coating corresponds to the optimal surface flatness, and the average hardness of the coatings is above 215 HV<sub>0.2</sub>, which is 1.6 times greater than that of the aluminum alloy substrate. Increasing the number of remelts to four resulted in a more homogeneous distribution of elements in the high-entropy alloy and improved corrosion resistance. The corrosion resistance increases and then decreases with increasing scanning interval. Among the four remelts, the best corrosion resistance was achieved at a scanning interval of 200 µm, with a 50 % improvement over the substrate. The volume wear of the coating is one order of magnitude lower than that of the substrate.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113285"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240260","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

2D phase unwrapping by attention-guided deep neural network for optical interferometry 用于光学干涉测量的注意引导深度神经网络二维相位展开

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113358

Youxing Li , Lingzhi Meng , Donghui Wang , Jiahao Zhang , Libo Yuan

{"title":"2D phase unwrapping by attention-guided deep neural network for optical interferometry","authors":"Youxing Li , Lingzhi Meng , Donghui Wang , Jiahao Zhang , Libo Yuan","doi":"10.1016/j.optlastec.2025.113358","DOIUrl":"10.1016/j.optlastec.2025.113358","url":null,"abstract":"<div><div>Two-dimensional phase unwrapping is an essential process in interferometry applications since the unwrapped phase plays a guiding role in the morphological reconstruction of the object. However, the unwrapped phase at each position is affected by the wrap states for other positions. Therefore, it is essential to obtain global context information for better phase unwrapping. To this purpose, we propose a novel attention-guided deep neural network that introduces the self-attention mechanism, a popular deep learning technique, to tackle the problem in a highly efficient way. We design a dual attention phase unwrapping network (DAPUN), which uses two kinds of complementary self-attention structures to obtain global context information (such as wrapped states), allowing each positional feature to be directly compared with ones at any other positions. To evaluate the effectiveness of the proposed DAPUN, we simulate extensive data to train the networks and compare it with several existing phase unwrapping methods. The results show that DAPUN significantly outperforms the previous state-of-the-art. After that, we apply the trained DAPUN to the real cases to demonstrate its generalization capability.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113358"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240650","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

Effects of temperature and stress in laser-assisted sealing of vacuum photovoltaic modules 温度和应力对真空光伏组件激光辅助密封的影响

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113332

Kaiqi Hu, Longlong Chen, Bingbing Chen

{"title":"Effects of temperature and stress in laser-assisted sealing of vacuum photovoltaic modules","authors":"Kaiqi Hu, Longlong Chen, Bingbing Chen","doi":"10.1016/j.optlastec.2025.113332","DOIUrl":"10.1016/j.optlastec.2025.113332","url":null,"abstract":"<div><div>One of the main issues that need to be addressed for the large-scale application of photovoltaic (PV) modules is ensuring their long-term stable operation. Conventional sealing methods cannot completely prevent the erosion of PV cells by water vapor and oxygen. We propose placing PV cells in a vacuum layer sandwiched between two glass sheets, with localized laser sealing around the perimeter. To this end, we constructed a transient three-dimensional model of PV module sealing using a laser heat source, studied the temperature and stress variations throughout the laser-assisted glass frit encapsulation process, and determined the basic mechanism of laser sealing for PV modules. Subsequently, we systematically investigated the laser sealing process parameters, exploring the impact trends of different process parameters on the weld morphology, deformation, temperature field, and stress field of the module. The results indicate that within the ranges of an average laser power of 10–30 W, sealing speed of 1–3 mm/s, and spot radius of 0.5–2.5 mm, the spot center temperature, maximum stress, and maximum deformation of the module increase with higher laser power, increased sealing speed, or smaller spot radius. The highest temperature and maximum transient thermal stress occur at the interface boundary of the upper glass, and there are significant differences in stress between the glass frit layer and the glass layer, with a correlation between thermal stress and thermal deformation. Different types of process parameters have varying impacts on temperature, stress, deformation, and the size of the molten pool. Experimental simulation results show that with appropriate laser process parameters, laser-assisted glass frit can efficiently seal vacuum PV modules, with the PV cells being sealed within a vacuum layer.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113332"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240377","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

Reflection-type quantitative phase microscopy for thermal conductivity and thermo-optic coefficient measurements of substrates and thin films 用于衬底和薄膜的热导率和热光学系数测量的反射型定量相显微镜

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113292

Nicholaus Kevin Tanjaya, Ilario Bisignano, Satoshi Ishii

{"title":"Reflection-type quantitative phase microscopy for thermal conductivity and thermo-optic coefficient measurements of substrates and thin films","authors":"Nicholaus Kevin Tanjaya, Ilario Bisignano, Satoshi Ishii","doi":"10.1016/j.optlastec.2025.113292","DOIUrl":"10.1016/j.optlastec.2025.113292","url":null,"abstract":"<div><div>Thermo-optic properties are critical for high-performance devices where both heat and light significantly affect their performance in different kinds of applications. However, methods for accurately characterizing these properties remain limited. This study demonstrates the development of quantitative phase microscopy (QPM) to simultaneously measure the thermal conductivity and thermo-optic coefficient (TOC) of various materials, including transparent and opaque substrates and transparent thin films on opaque substrates. The thermal conductivity values obtained using QPM are in good agreement with those measured via thermal wave analysis, and the TOC measurements align with the reported values in the references. Furthermore, the observed phase difference provides insights into the relative contributions of the thermal expansion coefficient and TOC to the overall phase shift. This approach is robust, cost-effective, and versatile compared to existing techniques, offering a valuable tool for characterizing thermo-optic properties in diverse material systems.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113292"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240380","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

Dual-Pitch staggered Long-Period fiber grating for mode conversion and permutation 用于模式转换和排列的双间距交错长周期光纤光栅

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113326

Xin Wang, Huiyi Guo, Zekun Shi, Zhi Wang, Yan-Ge Liu

{"title":"Dual-Pitch staggered Long-Period fiber grating for mode conversion and permutation","authors":"Xin Wang, Huiyi Guo, Zekun Shi, Zhi Wang, Yan-Ge Liu","doi":"10.1016/j.optlastec.2025.113326","DOIUrl":"10.1016/j.optlastec.2025.113326","url":null,"abstract":"<div><div>Mode division multiplexing (MDM) technology enhances transmission capacity by multiplexing modes that carry distinct information. However, as transmission distance increases, the differential mode group delay (DMGD) between modes becomes more pronounced, posing a critical challenge to long-haul MDM transmission. Introducing strong mode coupling through long-period fiber gratings has proven to be an effective approach to mitigating DMGD and enabling extended transmission. In this work, we propose and demonstrate a dual-pitch staggered long-period fiber grating (DSP-LPFG) capable of facilitating mode conversion between two distinct mode pairs. By strategically distributing three sets of DSP-LPFGs along the fiber, this method achieves periodic mode permutation of four mode groups along the entire length of fiber. The combined grating generates four target modes with a purity exceeding 90 %, while the device’s insertion loss remains below 0.7 dB. Theoretically, this approach balances energy ratio variations among modes within the transmission link and mitigates associated processing capability fluctuations. Consequently, it reduces the risk of overload in the MIMO equalizer at the receiving end, effectively addressing a key limitation of long-haul MDM transmission.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113326"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240372","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

A novel extraction and evaluation method for melt pool images in laser powder bed fusion 一种新的激光粉末床熔池图像提取与评价方法

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-09 DOI: 10.1016/j.optlastec.2025.113333

Jiansen Li , Kai Zhang , Tingting Liu , Zhiguang Zhu , Zhiyong Zou , Huiliang Wei , Zhiwei Xiong , Shi Yun , Wenhe Liao

{"title":"A novel extraction and evaluation method for melt pool images in laser powder bed fusion","authors":"Jiansen Li , Kai Zhang , Tingting Liu , Zhiguang Zhu , Zhiyong Zou , Huiliang Wei , Zhiwei Xiong , Shi Yun , Wenhe Liao","doi":"10.1016/j.optlastec.2025.113333","DOIUrl":"10.1016/j.optlastec.2025.113333","url":null,"abstract":"<div><div>In-situ monitoring of the laser powder bed fusion (LPBF) process is essential for ensuring quality and stability. This study proposes a novel extraction and evaluation method for monitoring melt pool images during LPBF to improve the accuracy and efficiency of extracted data. The proposed method segments the melt pool into regions of interest (ROI) based on the intensity gradient of the melt pool boundary in the images, enabling the extraction of texture features from the Gray Level Co-Occurrence Matrix (GLCM) subsequently. The intensity-gradient image processing has improved robustness and accuracy. Based on the widths from the melt pool and single track, the mean square error (MSE) is 12.22 μm, outperforming the conventional fixed-threshold method by 25.3 %. In addition, a classification and regression tree (CART) model was used to categorize the melt pools into four types—balling, irregularity, normal, and over-melting—based on geometric, shape, temperature, and texture features, achieving a classification accuracy of 97.24 %. It is found that the texture feature, contributing to 58.4 % of the importance, and the temperature feature, contributing 37.6 %, emerged as vital features in the melt pool identification process. The texture feature is particularly effective in identifying melt pools in normal and over-melting modes, mainly due to the Correlation (COR) and Contrast (CON). Our research sheds light on improving the accuracy of melt pool segmentation significantly and offers crucial insights for feature extraction, thereby providing considerable assistance for online defect identification in LPBF.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113333"},"PeriodicalIF":4.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240383","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