Optics and Lasers in Engineering最新文献

Dynamic intelligent frequency locking system based on dual-template kernelized correlation filter

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-19 DOI: 10.1016/j.optlaseng.2025.109024

Hai-bo Zhang, Hao Chen, Fang-jun Qin, Jiu-jiang Yan

{"title":"Dynamic intelligent frequency locking system based on dual-template kernelized correlation filter","authors":"Hai-bo Zhang, Hao Chen, Fang-jun Qin, Jiu-jiang Yan","doi":"10.1016/j.optlaseng.2025.109024","DOIUrl":"10.1016/j.optlaseng.2025.109024","url":null,"abstract":"<div><div>Cold atomic gravimeter demonstrates outstanding performance in marine dynamic measurement due to its high accuracy and long-term stability, while the system is sensitive to environmental factors and its laser frequency stabilization system relies on the peaks of individual typical Lamb dip, which are affected by these factors, leading to significant fluctuations in the differential signal and then introduces excessive dead time. This paper reported an automatic laser locking scheme utilizing the artificial intelligence algorithm. A dual-template kernelized correlation filter (DT-KCF) algorithm has been developed to identify the preset peak point of the saturation absorption spectroscopy (SAS) signal by compact optical pathway. Distributed Feedback Laser (DFB) at 780 nm is employed to experimentally investigate the intelligent algorithm through an Rb cell and the D2 saturation absorption lines of <sup>87</sup>Rb. Modulation-demodulation and incremental PI closed-loop feedback were implemented to fine-tune frequency, and enhanced frequency stabilization accuracy. The frequency locking status was monitored in real-time, and automatically started the re-finding and modem and demodulation links once the lock is unlocked. It can be concluded that the system could automatically relock within about 4.2 s in no human intervention, and the long-term frequency stabilization accuracy is 10<sup>–12</sup>.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109024"},"PeriodicalIF":3.5,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848031","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

Compact, highly sensitive, rapid continuous measurement of carbon dioxide released from fruits and vegetables based on QEPAS and TDLAS dual spectrum multiplexing technology

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-18 DOI: 10.1016/j.optlaseng.2025.109027

Juncheng Lu , Qiong Wu , Chongqiu Zhou , Jia Zheng , Wen Liu , Jie Shao

{"title":"Compact, highly sensitive, rapid continuous measurement of carbon dioxide released from fruits and vegetables based on QEPAS and TDLAS dual spectrum multiplexing technology","authors":"Juncheng Lu , Qiong Wu , Chongqiu Zhou , Jia Zheng , Wen Liu , Jie Shao","doi":"10.1016/j.optlaseng.2025.109027","DOIUrl":"10.1016/j.optlaseng.2025.109027","url":null,"abstract":"<div><div>This paper presents the development of a compact, highly sensitive and rapid continuous measurement CO<sub>2</sub> sensor based on the multiplexing of quartz-enhanced photoacoustic spectroscopy (QEPAS) and tunable diode laser absorption spectroscopy (TDLAS). The sensor utilizes a distributed feedback (DFB) laser diode with wavelength of 2004 nm as the excitation source, while the photoacoustic signal is generated using a commercially available, low-cost 30.720 kHz quartz tuning fork (QTF). The fiber-coupled grin collimator, QTF, acoustic micro-resonator, CO<sub>2</sub> reference cell, photodiode, gas chamber, thermistor, and Peltier were all integrated to create an ultra-compact acoustic detection module (ADM) with dimensions of 44.50 × 26.00 × 17.50 mm. In dual spectrum multiplexing technique, the detection limit of CO<sub>2</sub> was 8.7 ppm at 1 s, corresponding to a normalized noise equivalent absorption coefficient of 6.20 × 10<sup>–9</sup> W·cm<sup>-1</sup>·Hz<sup>-1/2</sup>. The long-term performance and stability of the QEPAS CO<sub>2</sub> sensor were evaluated through Allan deviation. Eventually, the minimum detection limit (MDL) increased to 0.7 ppm at 228 s. The QEPAS CO<sub>2</sub> sensor was developed for fast and highly sensitive measurements of CO<sub>2</sub> respiration rate in different fruit species. Among the six kinds of fruit and vegetable, edamame exhibited the highest CO<sub>2</sub> respiration rate, with an average of 55.16 ± 0.67 mL kg⁻¹ h⁻¹, while red grapes showed the lowest rate, averaging 6.12 ± 0.09 mL kg⁻¹ h⁻¹.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109027"},"PeriodicalIF":3.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842823","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

The analysis and optimization of the spatially synchronous fringe detection method (SSFD) to remove angular misalignment in echelle mosaic assembly

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-18 DOI: 10.1016/j.optlaseng.2025.109019

Rui Wang , Jian Han , Dong Xiao , Mingda Jiang , Huiqi Ye , Liang Tang , Yang Zhai

引用次数: 0

Rapid and high-accuracy oblique-illuminated reflective ptychography without pre-correction

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-17 DOI: 10.1016/j.optlaseng.2025.109016

Lei Huang , Yanqi Chen , Qingxin Wang , Su Li , Changjun Ke , Guangyan Guo , Lu Rong , Yishi Shi

{"title":"Rapid and high-accuracy oblique-illuminated reflective ptychography without pre-correction","authors":"Lei Huang , Yanqi Chen , Qingxin Wang , Su Li , Changjun Ke , Guangyan Guo , Lu Rong , Yishi Shi","doi":"10.1016/j.optlaseng.2025.109016","DOIUrl":"10.1016/j.optlaseng.2025.109016","url":null,"abstract":"<div><div>Ptychography offers several advantages, including a lensless design, a simple optical setup, high spatial resolution, and the elimination of the need for high-quality optical components. In applications like surface topography measurement, ptychography setups are typically configured in reflective mode. However, existing studies indicate that normal-incidence configurations are often complex and constrained by the arrangement of beam splitters. Furthermore, tilted illumination with vertical detection typically involves tilted plane correction methods for pre-correcting diffraction patterns or by developing more refined models, which can degrade reconstruction accuracy and increase computational overhead. This study derives a forward propagation model for reflective off-axis diffraction, where the beam maintains the same angle relative to both the sample plane and the recording plane, thereby eliminating the need for a pre-correction process. Based on our propagation model, we developed a regularized ptychography iterative engine combined with a total variation denoising algorithm, effectively suppressing sensor noise and potential experimental inaccuracies. Reflective samples were successfully reconstructed, and comparisons with pre-correction methods on USAF 1951 targets demonstrated a significant improvement in reconstruction speed as well as enhanced accuracy. Finally, the proposed method accurately retrieved the surface morphology of atomic force microscope test samples.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109016"},"PeriodicalIF":3.5,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842822","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

CTSC: Infrared image colorization with topology-aware semantic consistency

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-16 DOI: 10.1016/j.optlaseng.2025.109017

Fang Gao , Han Shi , Hanbo Zheng , Shengheng Ma , Jun Yu

{"title":"CTSC: Infrared image colorization with topology-aware semantic consistency","authors":"Fang Gao , Han Shi , Hanbo Zheng , Shengheng Ma , Jun Yu","doi":"10.1016/j.optlaseng.2025.109017","DOIUrl":"10.1016/j.optlaseng.2025.109017","url":null,"abstract":"<div><div>Unsupervised infrared image colorization aims to convert unpaired single-channel infrared images into multi-channel color images that align with human visual perception. While existing methods use patch-wise contrastive learning to explore semantic correspondences, they overlook implicit topology-aware semantic relationships, resulting in texture distortion and detail blurring. In this work, we propose a topology-aware semantic infrared image colorization method, which includes a Topology-aware Semantic Constraint Module (TSCM) and a Discriminator-guided Attention Sampling Strategy (DASS). Although infrared and color images differ spectrally, they convey the same scene structure. TSCM shares adjacency matrices between specific patches of infrared and color images, utilizing graph neural networks to capture node feature representations across different domain graphs. By maximizing mutual information through contrastive loss, TSCM ensures semantic consistency in topology and preserves structural information. DASS selects the most informative patches during training, guiding the generator to maintain both content consistency and topological semantic consistency. Finally, experiments based on the KAIST, FLIR, and M3FD datasets demonstrate that our method outperforms state-of-the-art approaches in colorization.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109017"},"PeriodicalIF":3.5,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833994","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

A novel digital image correlation based on a reliable subset strategy for discontinuous displacement measurement 基于可靠子集策略的新型数字图像相关技术，用于不连续位移测量

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-16 DOI: 10.1016/j.optlaseng.2025.109014

Wei Dong , Xuebin Wang , Guangchen Zhao , Qiang Mao

{"title":"A novel digital image correlation based on a reliable subset strategy for discontinuous displacement measurement","authors":"Wei Dong , Xuebin Wang , Guangchen Zhao , Qiang Mao","doi":"10.1016/j.optlaseng.2025.109014","DOIUrl":"10.1016/j.optlaseng.2025.109014","url":null,"abstract":"<div><div>Digital image correlation (DIC) is a widely employed method for deformation measurement. However, standard DIC is severely limited in discontinuous deformation measurement, because the shape functions used in standard DIC cannot accurately describe the discontinuous deformation of the subsets. In this paper, a reliable subset strategy is proposed to address discontinuities in DIC. In the implementation of this strategy, SIFT algorithm is utilized to match reference image and target images to obtain the reliable subsets. The reliable subset is a square region selected around matched feature points on reference image, which can avoid the discontinuous deformation regions. Then the reliable subset is correlated to obtain the exact deformation using the Gaussian weighted correlation function. Finally, the deformation parameters of a point of interest (POI) can be obtained by fitting the displacement of reliable subset centers for a fitting region around POI. In cases where discontinuities exist in the fitting region, the direct fitting method may yield substantial errors for obtaining POI deformation parameters. To ensure the accuracy of displacement measurements, the reliable subsets centers in the fitting region are classified into two categories along the crack face, and the most appropriate category is selected for the fitting process. The performance of the proposed method was verified by numerical simulation images and real images. Experimental results show that the proposed method is highly effective in handling displacement discontinuities.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109014"},"PeriodicalIF":3.5,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833995","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

Radial distortion evaluation and correction of dual-channel microscopic imaging system in quantitative FRET imaging

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-15 DOI: 10.1016/j.optlaseng.2025.109005

Jian Wang , Zhengyin Wang , Guiping Zhuang , Min Hu , Zhengfei Zhuang

{"title":"Radial distortion evaluation and correction of dual-channel microscopic imaging system in quantitative FRET imaging","authors":"Jian Wang , Zhengyin Wang , Guiping Zhuang , Min Hu , Zhengfei Zhuang","doi":"10.1016/j.optlaseng.2025.109005","DOIUrl":"10.1016/j.optlaseng.2025.109005","url":null,"abstract":"<div><div>Fluorescence resonance energy transfer (FRET) technology is widely used for real-time quantitative detection of protein interactions in living cells. Among FRET measurement techniques, Channel-based sensitized emission method (E-FRET) is becoming the most popular method due to its rapid detection, non-destructive nature, operational simplicity, and compatibility with both wide-field and confocal microscopy. In FRET imaging, image quality is crucial for the success of the FRET experiment. However, distortion, an inevitable problem for any microscopic imaging system equipped with an optical lens, often compromises image quality. The most important distortion type is radial distortion. This paper focuses on the radial distortion degree and distribution of cameras and the influence of image distortion on E-FRET experiments in the dual-channel microscopic imaging system. We fit multiple models to correct the radial distortion of the cameras and compare the quality of E-FRET imaging and the accuracy of FRET efficiency calculation before and after distortion correction. The final E-FRET imaging experiment demonstrates that distortion correction significantly enhances imaging quality and experimental accuracy.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 109005"},"PeriodicalIF":3.5,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834196","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-resolution, real-time 3D measurement using gradient features and spatial-temporal speckle projection system 利用梯度特征和时空斑点投影系统进行高分辨率实时三维测量

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-14 DOI: 10.1016/j.optlaseng.2025.108981

Tong Li , Shaohui Zhang , Qun Hao

{"title":"High-resolution, real-time 3D measurement using gradient features and spatial-temporal speckle projection system","authors":"Tong Li , Shaohui Zhang , Qun Hao","doi":"10.1016/j.optlaseng.2025.108981","DOIUrl":"10.1016/j.optlaseng.2025.108981","url":null,"abstract":"<div><div>Speckle projection profilometry (SPP) finds widespread application in industrial manufacturing and academic research owing to its benefits of non-contact, high speed and ease of integration. In this paper, we present a novel high-resolution, real-time 3D measurement technique realized through gradient-feature-based stereo matching and spatial-temporal speckle projection. In terms of algorithm, unlike traditional stereo matching methods that depend on grayscale information, we propose a new spatial-temporal stereo matching strategy based on horizontal and vertical gradient features as well as digital image correlation technique, enabling sub-pixel disparity estimation with high precision. On the hardware side, we developed an optical projection system capable of projecting temporally varying speckle patterns to encode the scene under test. Experiments are conducted to verify the feasibility and effectiveness of the proposed method. Our method achieves a root mean square error (RMSE) of 0.0621mm with two-frame speckle patterns (compared to 0.0835mm realized with the commonly used three-frequency four-step phase shifting method). In dynamic object experiments, our method achieves real-time 3D reconstruction at 27 frames per second. These experiments have validated the application prospects of the proposed method in achieving high-precision measurement with few frames.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828429","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

Focal scanning consistent light field measurement 焦点扫描一致的光场测量

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-14 DOI: 10.1016/j.optlaseng.2025.108996

Sibo Huang , Yang Liu , Wanyu Gu , Junyi Zhang , Chao Zuo , Xiaoli Liu , Zewei Cai

{"title":"Focal scanning consistent light field measurement","authors":"Sibo Huang , Yang Liu , Wanyu Gu , Junyi Zhang , Chao Zuo , Xiaoli Liu , Zewei Cai","doi":"10.1016/j.optlaseng.2025.108996","DOIUrl":"10.1016/j.optlaseng.2025.108996","url":null,"abstract":"<div><div>Focal scanning light field imaging uses a camera to capture images at different focal planes to form an image stack, from which full-pixel-resolution light field information can be computationally recovered, taking advantage of the transport-of-intensity property of light field propagation. In previous work, we experimentally demonstrated that the nonlinear depth mapping between the camera's image and object spaces leads to a discrepancy between image-space capture and object-space reconstruction, significantly affecting the accuracy of light field reconstruction. To this end, we propose a consistent light field measurement method in which the camera is pre-calibrated to establish an accurate transformation relationship between image and object spaces. By transforming the image stack from image space to object space and eliminating the effect of image distortion simultaneously, the space consistency condition is satisfied for light field reconstruction. Subsequently, the transmission distance prior in object space can be obtained to accurately reconstruct the objective light field from the corrected image stack. Since the reconstructed light field in the calibration space exhibits metric properties, metric depth can be further extracted to enable three-dimensional measurement with camera parameters. Experimental results demonstrate that the proposed method is valid and efficient in dealing with the inconsistency issue in focal scanning light field imaging, achieving high-quality consistent light field reconstruction and measurement.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828428","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

Early prognosis and feasible panacea for cervical cancer through math and optics

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-04-13 DOI: 10.1016/j.optlaseng.2025.108984

Munir Akhtar , Muhammad Abubakar Siddique , Manzoor Ahmad , Muhammad Abdul Majid , Sumara Ashraf , Madeeha Zahra , Wesam Atef Hatamleh , Muhammad Umar Dad , Hafeez Ullah , Rubaida Mehmood

{"title":"Early prognosis and feasible panacea for cervical cancer through math and optics","authors":"Munir Akhtar , Muhammad Abubakar Siddique , Manzoor Ahmad , Muhammad Abdul Majid , Sumara Ashraf , Madeeha Zahra , Wesam Atef Hatamleh , Muhammad Umar Dad , Hafeez Ullah , Rubaida Mehmood","doi":"10.1016/j.optlaseng.2025.108984","DOIUrl":"10.1016/j.optlaseng.2025.108984","url":null,"abstract":"<div><div>Tissue polarimetry is a quick, non-invasive, and inexpensive optical method that shows tremendous potential for enhancing the efficacy of traditional cancer diagnosis and staging. A comparison was made between eight derived polarization properties for benign (polyp) and malignant [non-differentiated squamous cell carcinoma (SCC), poorly differentiated (SCC), moderately differentiated (SCC) and chronic cervicitis] in 103 patients. Malignant cells exhibit a higher retardance and degree of polarization (DOP) than benign cells, although benign cells exhibit more total and linear depolarization. In patients with ovarian cancer, the association of CA 125 with creatinine serves as a prognostic factor. Fourier transform infrared spectroscopy shows that malignant tissues have a higher optical transmittance than benign tissues. Our hematological data demonstrates that the anti-microbial properties of moringa leaf extract make it a viable treatment for cervical cancer. The final and most difficult objective, tissue polarimetric setup for in vivo diagnostics, is achieved by all of the previously described experimental methods when they reach a pre-clinical trial.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"191 ","pages":"Article 108984"},"PeriodicalIF":3.5,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823637","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