Optics and Lasers in Engineering最新文献

{"title":"Impact of multiplicative noise removal on digital volume correlation-based optical coherence elastography","authors":"Hao Wu ,&nbsp;Jiaqiu Wang ,&nbsp;Zhengduo Zhu ,&nbsp;Han Yu ,&nbsp;Hujin Xie ,&nbsp;Runxin Fang ,&nbsp;Zhiyong Li","doi":"10.1016/j.optlaseng.2025.109097","DOIUrl":"10.1016/j.optlaseng.2025.109097","url":null,"abstract":"<div><div>Digital volume correlation-based optical coherence elastography (DVC-based OCE) may easily suffer from multiplicative speckle noise of optical coherence tomography (OCT) imaging, which can introduce non-negligible calculation errors. In this study, Hamilton-Jacobi partial differential equations were adopted for multiplicative noise removal of OCT images and the impact of multiplicative noise removal on DVC-based OCE was investigated. Several deformation conditions, including static, sub-pixel translation, uniform compression and non-uniform deformation, were tested. Results showed that multiplicative noise removal can suppress the maximum noise-induced error to less than 0.15 pixels in static tests. A more precise sub-pixel translation with an accuracy of 0.6 pixels was obtained. For uniform compression, multiplicative noise removal can extend the strain upper limit to 0.116 with an error less than 15% and a correlation value higher than 0.8. It also worked better in non-uniform deformation with more reliable calculation points. These findings provide a way to improve the measurement accuracy of the DVC-based OCE method by removing multiplicative noise on OCT images.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109097"},"PeriodicalIF":3.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134635","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":"Generative adversarial network based frequency domain enhancement and color compensation underwater image enhancement","authors":"Jiaxin Li,&nbsp;Zheping Yan","doi":"10.1016/j.optlaseng.2025.109102","DOIUrl":"10.1016/j.optlaseng.2025.109102","url":null,"abstract":"<div><div>In complex underwater environments, due to the large number of suspended particles as well as the varying scattering and absorption characteristics of light in different waters, underwater images are subject to diverse forms of mixed attenuation. Such as color bias, poor contrast, and degradation of details. This greatly limits the operational efficiency of underwater systems. To this purpose, we propose a new generative adversarial network based frequency domain enhancement and color compensation underwater image enhancement method, which performs image enhancement simultaneously in both the frequency and spatial domains. Specifically, we designed a dual-encoder architecture with a structural encoder and a color compensation encoder in the generator. We embed a Multi-scale Dense Feature Aggregation (MDFA) module in the dual encoder, to make different encoders extract rich semantic and contextual information according to different task requirements. In the decoder, we designed a based Frequency-domain Fourier Enhancement Module (FFEM) and a Complementary-color Prior Color-compensation Module (CPCM). The FFEM conducts color correction and detail enhancement of the features captured by structural encoder within the frequency domain. In the spatial domain, the CPCM utilizes the color compensation information extracted by the color compensation encoder to adjust the enhancement results of the FFEM. Abundant experiments indicate that the suggested method significantly improves the degraded image quality, exhibits superior generalization performance, and outperforms the state-of-the-art methods in both quantitative and qualitative evaluations. Our code is available at <span><span>https://github.com/LiJiaxin011/FCC-GAN</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109102"},"PeriodicalIF":3.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134634","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":"Low cross-talk multiple-image hiding via lateral-shifting multiplexing","authors":"Yupeng Zhu ,&nbsp;Xinyu Zhang ,&nbsp;Xiaoshuang Shen ,&nbsp;Yanqi Chen ,&nbsp;Zhaoke Mi ,&nbsp;Yusi Zhu ,&nbsp;Haoyu Wu ,&nbsp;Qi Zhou ,&nbsp;Peixiang Xiong ,&nbsp;Pingle Huang ,&nbsp;Changjun Ke ,&nbsp;Yishi Shi","doi":"10.1016/j.optlaseng.2025.109095","DOIUrl":"10.1016/j.optlaseng.2025.109095","url":null,"abstract":"<div><div>We propose a lateral-shifting multiplexing method for multi-image hiding with low cross-talk. Unlike schemes that use a single degree of freedom (such as wavelength <span><math><mi>λ</mi></math></span>, distance <em>z</em>, or angle <span><math><mi>θ</mi></math></span>), our approach translates phase keys across two degrees of freedom (<span><math><mrow><mstyle><mi>Δ</mi></mstyle><mi>x</mi></mrow></math></span> and <span><math><mrow><mstyle><mi>Δ</mi></mstyle><mi>y</mi></mrow></math></span>), enabling the successful extraction of high-quality images with a 1 mm multi-plane spacing. Meanwhile, the integration of a physics-driven neural network enhances the system's ability to reveal hidden images. Compared to diffraction distance multiplexing scheme with a single degree of freedom (<em>z</em>), our approach reduces cross-talk between extracted images, as demonstrated through experimental validation using a cascaded phase system.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109095"},"PeriodicalIF":3.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134515","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":"Real-time optical in-vivo thermo-viscoelastometry of albumen and blood vessels in chicken embryo models under laser heating and ablation","authors":"Lyazzat Mukhangaliyeva ,&nbsp;Shakhrizat Alisherov ,&nbsp;Vladimir Bessonov ,&nbsp;Zhannat Ashikbayeva ,&nbsp;Carlo Molardi ,&nbsp;Daniele Tosi ,&nbsp;Zhandos Utegulov","doi":"10.1016/j.optlaseng.2025.109116","DOIUrl":"10.1016/j.optlaseng.2025.109116","url":null,"abstract":"<div><div>The laser ablation technique is commonly used in biomedicine to treat tumor cancerous tissues with minimal invasiveness to surrounding normal tissues. However, an accurate non-contact, real-time, in-situ, label-free thermomechanical measurement of affected tissues undergoing laser heating and ablation is virtually non-existent in clinical settings. In this work, we demonstrate real-time monitoring of local temperature and viscoelastic response of the albumen and blood vessels in chick chorioallantoic membrane (CAM) models during infrared laser heating and ablation by non-contact, label-free Brillouin light scattering (BLS) spectroscopy and fiber Bragg grating (FBG)-based thermal mapping. The albumen and CAM models were selected as ethical and cost-effective models with an easily accessible vasculature network to investigate changes in thermal and viscoelastic properties during laser-induced heating and ablation. Both studied biomaterials became stiffer and less viscous during laser-induced heating due to the thermal denaturation of proteins, forming cross-links with subsequent gelation (coagulation) and water evaporation (dehydration). Demonstrated hybrid BLS-FBG modality has a strong potential to equip conventional laser ablation therapy with accurate, real-time thermomechanical property-informed diagnostics to substantially improve patient outcomes.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109116"},"PeriodicalIF":3.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139210","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":"Correction of resonator-induced distortions in light-induced thermoelastic spectroscopy: Second harmonic sideband perspective","authors":"Zhicheng Wu ,&nbsp;Jiahao Du ,&nbsp;Jiajia Wang ,&nbsp;Dexian Gao ,&nbsp;Xiang Li ,&nbsp;Heli Ni ,&nbsp;Qiaogen Zhang","doi":"10.1016/j.optlaseng.2025.109068","DOIUrl":"10.1016/j.optlaseng.2025.109068","url":null,"abstract":"<div><div>Light-induced thermoelastic spectroscopy (LITES) faces long-term instability caused by resonance parameter drift, phase fluctuations, and background thermal response. This study leverages the second harmonic sideband, containing fingerprint features of resonance parameters, to overcome the limitations of conventional wavelength modulation that focuses only on the central harmonic frequency. By quantifying the distortion mechanism of the resonator on the sideband, we achieve inversion of resonance parameters and use this to perform frequency domain compensation on the photothermal signal, effectively eliminating resonator-induced distortion. Experimental results highlight the method’s ability to resist triple interference. In the surface oxidation experiment, resonance parameter inversion achieves remarkable precision, with a resonance frequency error of 0.0012 % and a quality factor error of 0.59 %. The error in C₂H₂ concentration detection significantly decreased from &gt; 60 % to &lt; 10 % (for concentrations ≥300 μL/L). Under phase fluctuations spanning -90° to 90°, the relative standard deviation (RSD) of the signal value decreases from 25.3 % to 2.5 %. In addition, when humidity varies from 20 % to 70 % causing resonance parameter drift, the method reduces signal fluctuation from 44 % to &lt;5 %. This approach offers a pathway for achieving robust LITES operation in complex environments.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109068"},"PeriodicalIF":3.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124463","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":"Scattering of open vortex beams: Applications towards free space optical communications","authors":"MD. Haider Ansari ,&nbsp;Vinny Cris M ,&nbsp;Ravi Kumar ,&nbsp;Vijayakumar Anand ,&nbsp;Shashi Prabhakar ,&nbsp;Salla Gangi Reddy ,&nbsp;R.P. Singh","doi":"10.1016/j.optlaseng.2025.109090","DOIUrl":"10.1016/j.optlaseng.2025.109090","url":null,"abstract":"<div><div>The topological charge (TC) of optical vortex beams can be measured using various interferometric and non-interferometric techniques in both coherent and partially coherent domains. However, these methods are not suitable for obstructed vortex beams, also known as open optical vortex (OOV) beams. <strong>Recently, several methods for studying open optical vortex (OOV) beams, have recently been proposed and demonstrated based on interferometry, phase retrieval, spatial coherence analysis, which limit their applicability in the presence of significant perturbations or long-distance propagation.</strong> In this study, we propose and experimentally demonstrate an efficient method for measuring both the magnitude and sign of the topological charge (TC) of OOV beams using the auto-correlation distribution after scattering through a rough surface. We generated the OOV beams using partially blocked computer-generated holograms. <strong>Although the rings or zero points present in the auto-correlation are broken, the number of rings is equal to the TC. Further, we have utilized the radius of the first ring and its divergence with propagation distance, which can be easily observed for all orders, for finding the TC of higher orders</strong>. We can measure the sign of the topological charge solely through intensity measurements using the rotation of the autocorrelation profile with the help of blocking parameter. Furthermore, we demonstrate that the characteristics of OOV beams derived from our proposed method align well with the propagation characteristics of unobstructed OV beams. The results confirm the efficacy of optical vortex beams for free-space optical communication.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109090"},"PeriodicalIF":3.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116903","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":"Classification of Mueller matrices based on the arrow forms and their components of purity","authors":"Ying Chang","doi":"10.1016/j.optlaseng.2025.109083","DOIUrl":"10.1016/j.optlaseng.2025.109083","url":null,"abstract":"<div><div>Mueller matrices are always be chosen to describe the linear response of a medium because of its complete information. The huge and complex information prevents their interpretation and classification in terms of typical micro-structure of biological tissues, which weakens the unique advantages of Mueller matrix and thus limits the applications. In this work, a general classification of Mueller matrices is presented considering the degree of polarizance and the statistical structure. Arrow forms of Mueller matrices containing statistical parameters are characterized in the specific conditions of different values of degree of polarizance. A parameter RVC is derived containing the variances of the classified arrow form of experimental Mueller matrix to characterize the polarized properties of tissues, and verified by the depth-resolved images using skin of mouse ex vivo. This approach enables the classification with clear interpretation of Mueller matrix, making possible medical applications of identifying tissue structure and early lesions by their categories and the arrow forms of Mueller matrices.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109083"},"PeriodicalIF":3.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116902","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":"Enhancing the robustness of underwater computational ghost imaging systems based on FADOF","authors":"Lei Chen ,&nbsp;Zechuan Chen ,&nbsp;Lizhong Wu ,&nbsp;Longfei Yin ,&nbsp;Guohua Wu","doi":"10.1016/j.optlaseng.2025.109096","DOIUrl":"10.1016/j.optlaseng.2025.109096","url":null,"abstract":"<div><div>This research endeavors to boost the image quality of underwater computational ghost imaging systems amidst the challenges posed by background illumination and turbulent disturbances. Utilizing FADOF, we have empirically validated their advantage in mitigating interference and bolstering the robustness of imaging. In comparison to traditional filters, FADOF has proven to be remarkably resilient and stable in conditions rife with interference. Additionally, the strategic infusion of argon gas into the FADOF as a buffer has refined its transmission capabilities, adeptly filtering out extraneous frequency signals. Quantitative evaluations indicate that our enhanced FADOF markedly improves the quality of reconstructed images, achieving a commendable equilibrium between imaging proficiency and resource expenditure, especially at a 5 torr fill level. The findings of this study chart new courses for the evolution of underwater ghost imaging techniques, with far-reaching implications for augmenting our capacity for marine observation and fostering the sustainable exploitation of marine resources.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109096"},"PeriodicalIF":3.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116904","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":"High-resolution and real-time non-line-of-sight imaging based on spatial correlation","authors":"Wenjun Zhang ,&nbsp;Shuo Zhu ,&nbsp;Lijia Chen ,&nbsp;Lianfa Bai ,&nbsp;Edmund Y. Lam ,&nbsp;Enlai Guo ,&nbsp;Jing Han","doi":"10.1016/j.optlaseng.2025.109100","DOIUrl":"10.1016/j.optlaseng.2025.109100","url":null,"abstract":"<div><div>Non-line-of-sight (NLOS) imaging technique has broad application prospects in fields such as autonomous driving and robotic vision. Among the existing NLOS imaging methods, the scan-free methods allow rapid data acquisition. However, the imaging resolution is limited by the system's temporal jitter and the number of pixels in the array detector, and the real-time recovery of complex dynamic scenes is still a major challenge. Here, based on the temporal and spatial broadening of the signal and the evolution characteristics of optical transmission fields, we establish the three-dimensional blur kernel and the forward evolution model under scan-free conditions. Subsequently, leveraging the spatial correlation between adjacent detection region information, we propose a resampling method to obtain high-resolution data information with fine collection. Combining this with three-dimensional blur kernel modeling makes high-resolution imaging of hidden targets realized through model inversion. Our method improves the lateral resolution of the imaging results and enables the reconstruction of dynamically complex scenes. We demonstrate high-resolution NLOS imaging at 5 frames per second for dynamic scenes, providing valuable insights for practical applications of NLOS imaging.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109100"},"PeriodicalIF":3.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105618","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":"Design of a three-channel common-aperture miniaturized optical system based on the Ritchey-Chretien (RC) telescope","authors":"Lei Zhang ,&nbsp;Zihui Zhang ,&nbsp;Junqing Zhu ,&nbsp;Xiaoxu Wang ,&nbsp;Guanyu Lin ,&nbsp;Bo Li ,&nbsp;Xi Wang","doi":"10.1016/j.optlaseng.2025.109075","DOIUrl":"10.1016/j.optlaseng.2025.109075","url":null,"abstract":"<div><div>To meet the demands for miniaturization and high performance in multi-channel optical systems for applications such as atmospheric environment monitoring, climate change research, and space target identification and tracking, this paper presents a compact three-channel optical system based on a common-aperture design. The system includes a long-wave infrared (LWIR) channel, a visible-star sensor channel, and a laser ranging channel, which are used for space target detection, stellar point target imaging observation, and high-precision target ranging, respectively. Through analyzing the observational requirements for space targets at a long distance of 50 km, the paper determines the overall specifications for the optical system. During the design process, a cassegrain structure and a combination of multi-material lenses are employed to mitigate chromatic aberration. Additionally, optical design software is used to optimize the system, achieving a compact layout and high imaging quality. The results show that the overall system achieves balanced performance across multiple channels. The infrared channel has an F-number (F^#) of 2, with modulation transfer function (MTF) values above 0.2 at the Nyquist frequency, approaching the diffraction limit. The infrared system achieves 100 % cold stop efficiency, ensuring efficient energy concentration and fully meeting design requirements. The visible channel maintains stable spot quality, with maximum distortion better than 0.024 % and accurate centroid positioning. Meanwhile, the laser ranging receiver channel demonstrates precise distance measurement capability. Finally, a tolerance analysis was conducted for each optical channel to verify the theoretical accuracy and manufacturability of the system. This optical system scheme effectively reduces the volume and weight of space optical payloads, providing a new solution for the practical deployment of multi-channel optical systems in complex application scenarios and demonstrating significant application value.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109075"},"PeriodicalIF":3.5,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090283","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}