Optics and Lasers in Engineering最新文献

{"title":"Employing an optical configuration for full-surface 360° measurement in multi-view digital image correlation","authors":"Yanbing Li ,&nbsp;Yande Liu ,&nbsp;Rong Wu","doi":"10.1016/j.optlaseng.2025.108986","DOIUrl":"10.1016/j.optlaseng.2025.108986","url":null,"abstract":"<div><div>The mirror-assisted multi-view digital image correlation (MV-DIC) method employs a stereo vision system using two mirrors to achieve 360° panoramic measurement of objects. This approach utilizes the two mirror devices to divide the object into three images, reconstructed independently using the stereo vision system. A complete 360° panoramic measurement is achieved by image stitching. However, this method poses challenges in simultaneously capturing all three surfaces of the object within the different depth of field of the imaging system, resulting in unclear images of certain surfaces and measurement errors. To address this issue, this study introduced a novel optical configuration for MV-DIC system. In this system, a pair of right-angle prisms are incorporated, which play a crucial role in adjusting the position of the prisms to effectively resolve the issue of achieving high-precision imaging of different regions of the object across varying depth of field ranges. Furthermore, to facilitate high-precision 360° panoramic measurement, a panoramic stitching method for three-dimensional data from different viewpoints is proposed. Experimental results indicated that the proposed method not only compensates for errors induced by the depth of field discrepancies but also offers superior accuracy in 360° panoramic morphology, displacement and strain measurement compared to traditional mirror-assisted MV-DIC systems, providing reassurance in its performance.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799328","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}

{"title":"Multi-stage matching for different sources of geospatial images based on local image self-similarity","authors":"Yuhui Zhao ,&nbsp;Yuxuan Liu ,&nbsp;Zhihua Hu ,&nbsp;Pu Chen ,&nbsp;Xiao-Jian Chen ,&nbsp;Bo Dong","doi":"10.1016/j.optlaseng.2025.108982","DOIUrl":"10.1016/j.optlaseng.2025.108982","url":null,"abstract":"<div><div>The combined use of multi-source geospatial imagery is crucial for many applications, including image registration and three-dimensional reconstruction. However, complex geometric transformation and nonlinear radiation distortion are always present in different sources of geospatial images, significantly increasing the difficulty of effective matching. To address this, we introduce a robust method for matching multimodal geospatial data by integrating salient image features and dense templates to enhance matching accuracy. Our method begins by extracting local structural information from each pixel using the local self-similarity (LSS) model. We then construct a rotation-invariant feature descriptor that is combined with scale space for coarse matching with geometric invariance. After that, we resample the sense image and conduct feature matching on the reference image and the sampled sense image. Finally, a dense image template is designed and the matching accuracy is refined using the results obtained from feature matching. Experimental results conducted on various types of multimodal geospatial images, including optical, infrared, synthetic-aperture radar, and digital maps, demonstrate that our method surpasses multiple state-of-the-art matching techniques by achieving higher correct match counts, improved precision and recall, and lower root mean square error. These findings validate the effectiveness of our approach in achieving robust and accurate matching across diverse multi-source geospatial datasets.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 108982"},"PeriodicalIF":3.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791324","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}

{"title":"Structured light vision-based online quality inspection of weld formation for arc-welded joints in steel","authors":"Hao Wang ,&nbsp;Rongchao Fang ,&nbsp;Hao Jiang ,&nbsp;Yu Liu ,&nbsp;Xiaohui Zhao ,&nbsp;Chao Chen","doi":"10.1016/j.optlaseng.2025.108991","DOIUrl":"10.1016/j.optlaseng.2025.108991","url":null,"abstract":"<div><div>The current non-destructive testing for the quality of weld formation remains predominantly dependent on low-efficiency, low-intelligence and low-precision manual evaluation, which seriously impedes the construction of the fully automated welding production system, ranging from assembly to quality inspection. To overcome this limitation, a novel online quality inspection technology of weld formation for arc-welded joints in steel is proposed. The establishment of the 3D coordinate recognition model for quality inspection is prioritized to empower the technology to perceive spatial information, merging the complex task of measuring weld geometrical dimensions and the cumbersome process of identifying, classifying, locating and quantitatively evaluating weld geometrical imperfections into a unified structured light vision scanning procedure. During the scanning operation, the image processing algorithm integrating YOLOv5 with the innovative spatial distance judgement method (SDJM) performs autonomous weld classification while simultaneously measuring weld geometrical dimensions, such as weld width, reinforcement and leg sizes of fillet weld. Crucially, the algorithm extends beyond mere weld profile dimension monitoring to achieve precise detection, localization, and classification of geometrical imperfections, including undercut, overlap, excess weld metal, incompletely filled groove, linear misalignment, excessive asymmetry fillet weld and excessive convexity, with autonomous quality level evaluation against the ISO 5817:1992 standard. Experimental validation confirms that the proposed technology is capable of measuring weld geometrical dimensions with the accuracy of 10⁻² mm, achieving the 100 % evaluation rate for quality levels of geometrical imperfections, and reconstructing 3D morphology consistent with the actual weld, which satisfies the requirements for online quality inspection of weld formation in automated welding production lines.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 108991"},"PeriodicalIF":3.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785396","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}

{"title":"Gain-Switched Tm:YAG tunable single-longitudinal-mode laser using twisted-mode technique","authors":"Bingzheng Yan ,&nbsp;Yibo Qin ,&nbsp;Xikui Mu ,&nbsp;Hui Chen ,&nbsp;Chuanmeng Zhang ,&nbsp;Yaoyao Qi ,&nbsp;Jie Ding ,&nbsp;Zhenxu Bai ,&nbsp;Yulei Wang ,&nbsp;Zhiwei Lu","doi":"10.1016/j.optlaseng.2025.108990","DOIUrl":"10.1016/j.optlaseng.2025.108990","url":null,"abstract":"<div><div>2 μm lasers are eye-safe and have extensive applications in differential absorption lidar (DIAL). This study demonstrated a Tm:YAG single-longitudinal-mode pulsed laser that employs the gain-switching principle in combination with the twisted-mode technique. With the repetition frequency of 1500 Hz, this laser achieved a maximum average output power of 111 mW, characterized by stable pulse output, a pulse width of 1.3436 μs, pulse energy of 74 μJ, and peak power of 55.08 W, resulting in a slope efficiency of 37.55 %. Additionally, the Tm:YAG laser exhibited wavelength tunability from 2006.7 nm to 2012.7 nm across different operating temperatures. This laser will play a certain guiding role in the design of the laser source for 2 μm DIAL.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 108990"},"PeriodicalIF":3.5,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777083","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}

{"title":"Spectral compressive structured illumination microscopy","authors":"Zhengqi Huang ,&nbsp;Yunhua Yao ,&nbsp;Yilin He ,&nbsp;Juntong Cao ,&nbsp;Yu He ,&nbsp;Mengdi Guo ,&nbsp;Bozhang Cheng ,&nbsp;Xinyi Huang ,&nbsp;Hongmei Ma ,&nbsp;Dalong Qi ,&nbsp;Yuecheng Shen ,&nbsp;Lianzhong Deng ,&nbsp;Zhiyong Wang ,&nbsp;Zhenrong Sun ,&nbsp;Shian Zhang","doi":"10.1016/j.optlaseng.2025.108985","DOIUrl":"10.1016/j.optlaseng.2025.108985","url":null,"abstract":"<div><div>Super-resolution microscopy techniques overcome the resolution limitation imposed by optical diffraction and have therefore become indispensable tools for observing fine biological structures and dynamics at the sub-organelle scale. By incorporating additional spectral information, the imaging capabilities of super-resolution microscopy can be further enhanced. However, existing techniques mainly rely on multicolor labeling or wavelength scanning, which limit the number of spectral channels and the imaging speed. In this work, we present the design of a spectral compressive structured illumination microscopy (SC-SIM) technique that integrates spectral compressive imaging with structured illumination microscopy. By employing spatial-spectral compression of striped images and subsequent image reconstruction, SC-SIM achieves spectrally resolved super-resolution imaging without the loss of imaging speed. The feasibility of SC-SIM is validated through simulations, demonstrating super-resolution imaging with up to 10 spectral channels. SC-SIM offers a novel technical pathway for hyperspectral super-resolution imaging, facilitating research on sub-organelle structures and dynamics.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"190 ","pages":"Article 108985"},"PeriodicalIF":3.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760310","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}

{"title":"Cladding gratings fabricated using femtosecond laser plane by plane inscription for vectorial curvature sensing","authors":"JiaHao Guo ,&nbsp;Wei Wang ,&nbsp;JunYing Zhang ,&nbsp;YaLin Yu ,&nbsp;ZiLong Guo ,&nbsp;XiongXing Zhang ,&nbsp;DaRu Chen ,&nbsp;HaiBin Chen","doi":"10.1016/j.optlaseng.2025.108983","DOIUrl":"10.1016/j.optlaseng.2025.108983","url":null,"abstract":"<div><div>We present and demonstrate a compact and simple all-fiber one-dimensional vector curvature sensor based on writing a cladding fiber Bragg grating (CLFBG) next to the core of a single-mode fiber (SMF). The CLFBG is written using a femtosecond (fs) laser with a plane-by-plane (Pl-b-Pl) method. The refractive index modulation region (RIM) induced by the fs laser is similar in size to the fiber core, increasing the coupling efficiency of the CLFBG. The reflection spectrum of CLFBG changes in terms of wavelength and intensity based on the curvature and direction of the fiber bend. By combining the wavelength and intensity responses of CLFBG, it is possible to simultaneously measure the magnitude and direction of the curvature. Experimental results show that the sensor has a maximum wavelength sensitivity of 81.6 pm/cm^-1 and a maximum intensity sensitivity of -2.20 dB/m^-1<span><math><mo>.</mo></math></span> This structure holds significant potential for applications in structural health monitoring, robotic movement, biomedical, and biomechanical fields.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"190 ","pages":"Article 108983"},"PeriodicalIF":3.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747516","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}

{"title":"Phasing detection method for the optical multiple-aperture system based on the pyramidal signal","authors":"Shengqian Wang ,&nbsp;Kunkun Cheng ,&nbsp;Xuesheng Liu ,&nbsp;Yuandong Cheng","doi":"10.1016/j.optlaseng.2025.108965","DOIUrl":"10.1016/j.optlaseng.2025.108965","url":null,"abstract":"<div><div>A phasing method for the optical multiple-aperture system can be realized using the overlapping pupils when the light beam is focused onto a pyramid, like a pyramid wavefront sensor. The physical idea of this method is to combine beams from different sub-apertures of the multiple-aperture system to form interference based on focal plane filter of the pyramid. When there is a co-phasing piston error between the sub-apertures, the shape of the interference pattern will change significantly, so that the piston error information can be obtained through this change. Theory analysis and simulation results show that this detection method has good accuracy and linearity. The laboratory experiment based on this method was carried out and the results show that the measurement accuracy of the method is within 10nm. Closed-loop correction of large piston error is also realized by using dual-wavelength technique to resolve the phase ambiguity and the dynamic range can reach several micrometers.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"190 ","pages":"Article 108965"},"PeriodicalIF":3.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748238","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}

{"title":"Virtual line light source-based beam collimation for pulse-driven Gaussian-like VCSEL array emission","authors":"Zihan Yi ,&nbsp;Naerzhuoli Madeniyeti ,&nbsp;Yinong Zeng ,&nbsp;Xiao-Nan Tao ,&nbsp;Aiming Ge ,&nbsp;Hui Zhao ,&nbsp;Jian Qiu ,&nbsp;Kefu Liu ,&nbsp;Connie Chang-Hasnain","doi":"10.1016/j.optlaseng.2025.108970","DOIUrl":"10.1016/j.optlaseng.2025.108970","url":null,"abstract":"<div><div>In this research we proposed a pulse-driven VCSEL array collimation model, termed the Virtual Line Light Source, designed for beam shaping extended Gaussian-like sources with a single lens. The technique employed for determining the lens surface area involved the utilization of a multi-channel peak-hold circuitry for measurement. The diameter of the lens was precisely regulated by the coordinates of the initial reference points. Virtual line source ray tracing simulated the target's spot size and intensity. MATLAB computations, corroborated by ZEMAX validations, demonstrated a 15 % reduction in the divergence angle compared to the Simultaneous Multiple Surface method. The model also achieved a 0.6 <em>m</em> × 0.6 m uniform spot for a 1.7 mm VCSEL array at 10 m, advancing cost-effective collimation techniques.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"190 ","pages":"Article 108970"},"PeriodicalIF":3.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748237","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}

{"title":"Optical directed Majority/minority gate","authors":"Tanay Chattopadhyay","doi":"10.1016/j.optlaseng.2025.108972","DOIUrl":"10.1016/j.optlaseng.2025.108972","url":null,"abstract":"<div><div>Directed logic (DL) circuit is an alternative technology in optical computing to conventional logic circuits. It performs a logic function and its inverse operation simultaneously. So data loss can not happen in DL circuits. In this paper, an optical majority voter function and its inverse i.e. minority voter function have been designed with electro-optic Mach-Zehnder interferometers. Numerically simulated CR (∼6.5 dB), and AM (∼2 dB) have been calculated using output waveform obtained from the 2D-beam propagation method. Directed logic-based vector matrix model has also been analyzed. The quantum realization of this optical gate has been designed using reversible Toffoli gates and also with quantum primitive gates. The quantum equivalent circuit has been designed in a real quantum computer and the output results have been shown.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"190 ","pages":"Article 108972"},"PeriodicalIF":3.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738400","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}

{"title":"Fractional OAM basis wavefront single-pixel imaging","authors":"Yuxin Lu ,&nbsp;Zixian Yin ,&nbsp;Wenjing Zhao ,&nbsp;Aiping Zhai ,&nbsp;Dong Wang","doi":"10.1016/j.optlaseng.2025.108956","DOIUrl":"10.1016/j.optlaseng.2025.108956","url":null,"abstract":"<div><div>Existing orbital angular momentum basis-based wavefront single-pixel imaging (OAM-WSPI) utilizes integer OAM beams as the modulation basis to measure the spatial wavefront, which has attracted attention recently. As an indispensable complement to integer OAM beams, fractional OAM beams have unique physical properties such as more sophisticated modulation dimensions and so on. However, the implementation of OAM-WSPI using fractional OAM beams has not yet been verified. Here, taking the fractional Laguerre Gaussian (LG) beams as an example, we implemented the fractional LG basis-based WSPI (FLG-WSPI) and verified the feasibility of using fractional OAM beams as the modulation basis for WSPI. Furthermore, the influence of the inherent parameters of the fractional LG beams on the imaging performance of FLG-WSPI has been investigated in detail. Simulations and experiments show that the range of radial index, azimuthal index, and beam waist radius of the FLG basis influences the field of view (FOV). This work promotes the development of OAM-WSPI techniques.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"190 ","pages":"Article 108956"},"PeriodicalIF":3.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737320","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}