Optics and Lasers in Engineering最新文献

{"title":"High-speed temporal optical signal detection in turbid media using lensless single random phase encoding","authors":"Gregory Aschenbrenner,&nbsp;Rakesh Joshi,&nbsp;Yinuo Huang,&nbsp;Bahram Javidi","doi":"10.1016/j.optlaseng.2025.108911","DOIUrl":"10.1016/j.optlaseng.2025.108911","url":null,"abstract":"<div><div>This paper introduces a lensless high-speed optical signal detection system utilizing Single Random Phase Encoding (SRPE) to enhance detection of temporally modulated optical signals in turbid water. The signal detection system uses on-off amplitude keying and optical Gold Codes, in combination with SRPE encoding, to significantly enhance robustness in signal detection despite environmental challenges. Unlike conventional lensed systems, the proposed SRPE approach capitalizes on the inherent advantages of lensless imaging, such as compactness and reduced system complexity. In our experimental results, the system maintains high detection accuracy across a wide range of turbidity levels, showcasing its potential to operate effectively in a variety of scattering conditions. Furthermore, the ability to compress captured data by substantial dimensionality reduction such as 1D data representation while preserving signal detection integrity is a key advantage, facilitating efficient storage and processing without compromising performance. The results indicate that the lensless SRPE sensing system may be uniquely positioned to address the demands of high-speed underwater signal detection and communication applications. Its compact form factor, low dimensional signal capture capability, and resilience against turbidity make it a promising tool for scenarios where traditional lensed systems face challenges. The system's adaptability to challenging optical environments while retaining efficiency underscores its potential to underwater sensing technologies. To the best of our knowledge, this is the fastest underwater optical signal detection using lensless SRPE sensing ever reported.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108911"},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519305","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":"3D TIRF microscopy: Combination of the total internal reflection fluorescence microscopy and ultramicrotomy techniques","authors":"Konstantin E. Mochalov ,&nbsp;Olga I. Agapova ,&nbsp;Igor I. Agapov ,&nbsp;Denis S. Korzhov ,&nbsp;Daria O. Solovyeva ,&nbsp;Svetlana V. Sizova ,&nbsp;Milena S. Shestopalova ,&nbsp;Vladimir A. Oleinikov ,&nbsp;Anton E. Efimov","doi":"10.1016/j.optlaseng.2025.108891","DOIUrl":"10.1016/j.optlaseng.2025.108891","url":null,"abstract":"<div><div>Improvement of the existing methods of ultrahigh-resolution microscopy and development of new ones, in particular, methods of three-dimensional (3D) analysis and imaging of the ultrastructure of biological objects and nanomaterials, are extremely important tasks in biomedicine, cell biology, and nanotechnology. Here, a method of 3D total internal reflection fluorescence (TIRF) microscopy is proposed that combines ultramicrotomy (successive ultrathin sections of the sample) and TIRF microscopy of the sample surface. The key feature of this combined technique is the use of a specialized diamond ultramicrotome knife both as a tool for making the sections and as a TIRF prism for obtaining layer-by-layer TIRF images within a single measurement procedure. This makes it possible to reconstruct the 3D ultrastructure of objects.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108891"},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510641","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":"Strain heterogeneity measurement of mouse sclera by stereo digital image correlation under inflation testing","authors":"Gianfranco Bianco ,&nbsp;Samuel Insignares ,&nbsp;John Kuchtey ,&nbsp;Rachel W. Kuchtey","doi":"10.1016/j.optlaseng.2025.108895","DOIUrl":"10.1016/j.optlaseng.2025.108895","url":null,"abstract":"<div><div>Scleral biomechanics has emerged as an important topic in eye research, particularly for understanding the pathophysiology of diseases such as myopia and glaucoma. For the biomechanical characterization of scleral tissue, the three-dimensional digital image correlation (3D-DIC) method has been widely used as an accurate optical tool for full-field deformation measurements during ex vivo inflation testing in different species like cow, pig, human, rat, and tree shrew, with a large range of eye size roughly between 38 mm and 7 mm. Mouse has been used as the common model in glaucoma and more recently in myopia research, but until now, due to the small eye size (∼ 4 mm in diameter), no stereo-DIC has been proposed for whole-eye inflation testing. We present the first setup of inflation testing of intact mouse eyes for measuring the strain field of the sclera by the 3D-DIC method during quasi-static pressure loading, along with an analysis of the variables required to design a stereo-DIC system. In addition, we investigated the biomechanical characterization of mouse sclera, and the evolution of the sclera strain distribution during a loading-unloading cycle. We discovered that the scleral strain distribution during quasi-static linear changes of intraocular pressure (IOP) follows a Lognormal distribution whose standard deviation represents a metric of the biomechanical heterogeneity of the strain response.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108895"},"PeriodicalIF":3.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508819","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":"Study on calibration method for binocular colour camera","authors":"Hui Zhang,&nbsp;Weimin Che,&nbsp;Qiming Fan,&nbsp;Shilong Yuan,&nbsp;Wei Lin,&nbsp;Hongji Zhang","doi":"10.1016/j.optlaseng.2025.108894","DOIUrl":"10.1016/j.optlaseng.2025.108894","url":null,"abstract":"<div><div>Camera calibration is crucial for optical measurement systems, particularly for optical measurement in industrial applications. Conventional visual research commonly implies that colour cameras are not ideal for precise measurements involving precision. Consequently, studies on camera calibration mostly focus on monochrome cameras. Herein, a novel calibration method for binocular colour camera is proposed, which introduces a sub-pixel ellipse centre localisation technique that incorporates adaptive channel fusion. The fusion weights for different channels are adjusted according to reprojection error. Consequently, the parameters of the binocular colour camera are optimised with an enhanced artificial bee colony with local search. Experiments have been conducted on colour cameras with different focal lengths and chip models under three different lighting conditions (underexposure, normal exposure and overexposure), demonstrating improved accuracy of 7.16 %, 7.03 % and 14.58 % compared with traditional methods.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108894"},"PeriodicalIF":3.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510639","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":"Multiplane experimental optical data encryption using phase only holography","authors":"Juan Andrés González-Moncada,&nbsp;Alejandro Velez-Zea,&nbsp;John Fredy Barrera-Ramírez","doi":"10.1016/j.optlaseng.2025.108900","DOIUrl":"10.1016/j.optlaseng.2025.108900","url":null,"abstract":"<div><div>In this paper, we demonstrate a scheme to encrypt multiplane scenes using an experimental joint transform correlator cryptosystem capable of full complex modulation, implemented with a single phase-only spatial light modulator. We use two different encoding algorithms to achieve full complex modulation of the input plane of the joint transform correlator cryptosystem, enabling the encryption of any complex optical field using arbitrary complex-valued encryption keys. Using the capabilities of this proposal, we demonstrate, for the first time to our knowledge, the experimental optical encryption of a multiplane scene composed of up to nine different 2D objects placed at different distances along the optical axis. This scheme is implemented using both double-phase encoding and binary amplitude encoding, and the performance with both encoding approaches is compared both numerically and experimentally. We show that binary amplitude encoding is superior to double-phase encoding, producing results with comparable or higher quality, particularly in the experimental case, and allowing the encryption of larger scenes than what is possible using double-phase encoding.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108900"},"PeriodicalIF":3.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-decoupling six-dimensional force/ torque sensor based on fiber bragg grating","authors":"Yunlong Li ,&nbsp;Tao Tan ,&nbsp;Yinlei Xie ,&nbsp;Chao Duan ,&nbsp;Elfed Lewis ,&nbsp;Ye Tian ,&nbsp;Jianzhong Zhang ,&nbsp;Senior Member, IEEE","doi":"10.1016/j.optlaseng.2025.108896","DOIUrl":"10.1016/j.optlaseng.2025.108896","url":null,"abstract":"<div><div>A self-decoupling six-dimensional force/torque sensor based on Fiber Bragg grating is described, which is designed based on a spherical rotor and a double-layer beam. 14 FBGs are symmetrically attached to the elastic structure, enabling differential measurement of force/torque-induced strains. The sensing characteristics are obtained through simulation and experiment. Calibration experiments demonstrate low cross coupling errors of 2.26 %, 2.37 %, 1.49 %, 2.89 %, 1.79 % and 1.66 % within the range of ±5.72 N, ±5.72 N, ±5.72 N, ±0.206 Nm, ±0.206 Nm and ±0.147 Nm, for the detection of <em>Fx, Fy, Fz</em>, Mx, <em>My</em> and <em>Mz</em>, respectively. Compared to existing six-dimensional force/torque sensors, the designed sensor uses a spherical sliding structure to reduce dimensional coupling, simplifying calibration and maintenance. This sensor holds significant potential for broad application in six-dimensional force/torque measurement, particularly in robotics, medicine, and aerospace.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108896"},"PeriodicalIF":3.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487716","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":"Mechanism analysis of laser welding strength improvement of dissimilar materials based on surface micro-texture","authors":"Fanshuo Jia,&nbsp;Chuanyang Wang,&nbsp;Yayun Liu,&nbsp;Guangjie Wang,&nbsp;Ning Jiang","doi":"10.1016/j.optlaseng.2025.108902","DOIUrl":"10.1016/j.optlaseng.2025.108902","url":null,"abstract":"<div><div>Achieving a robust interfacial bond between metal and polymer is critical to the lightweight design of vehicles. A laser welding scheme based on a novel bionic micro-texture is proposed to improve the weldability and welding strength of 5182 aluminum alloy and 30 % glass fiber reinforced PA66. The surface pre-treatment by the nanosecond laser is used on the aluminum alloy to form micro-textures. Then, heat conduction welding is used to join the aluminum alloy and PA66. Associated characterization and mechanical tests of the welding joint are carried out. The bonding and failure mechanisms of the welding joint are investigated. The results demonstrate that the highest tensile strength of the welding joint with bionic micro-texture attains 17.26 MPa, increasing up to 531.1 % compared with untreated. The bionic micro-texture achieves higher joint strength at lower laser power. The micro-texture improves the wettability of the aluminum alloy surface and thus facilitates the formation of welding joints. The shape of the bionic micro-texture improve the stress distribution of the welding joint and effectively inhibit the initiation and extension of hybrid failure.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108902"},"PeriodicalIF":3.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480079","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":"Laser stripe centre extraction method for fuel assembly deformation measurement","authors":"Jieting Ju ,&nbsp;Zexiao Xie","doi":"10.1016/j.optlaseng.2025.108893","DOIUrl":"10.1016/j.optlaseng.2025.108893","url":null,"abstract":"<div><div>Fuel assemblies are essential components of a nuclear reactor, and regular deformation detection of these assemblies is crucial for safety and performance. In line structured light measurement, laser plane is projected onto the grids and fuel rods, producing two types of laser stripe images. The unique shapes of the assemblies and significant reflection in the laser stripe images complicate the extraction of their centre points. To tackle this challenge, we propose a two-step algorithm. In the first step, the region of interest extraction method based on contour shape and the centre propulsion algorithm with adaptive laser stripe width are proposed to get the initial centre points. In the second step, we address the reflective areas of the grid laser stripes by employing an improved random sample consensus algorithm to eliminate outliers, followed by linear interpolation for correction. For the fuel rods, we utilize principal component analysis to calculate the normal of the initial centre points, which helps in correcting the centre points of the arc-shaped laser stripes. The experimental results show that the method in this paper is robust and can accurately and efficiently extract the centre points of the fuel assembly laser stripes.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108893"},"PeriodicalIF":3.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480074","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-performance Si-based on-chip wavelength division (de)multiplexer designed with inverse design methods","authors":"Meitong Dong ,&nbsp;Huiqin Wang ,&nbsp;Jiaxiang Li ,&nbsp;Nanrun Zhou ,&nbsp;Hua Zhang ,&nbsp;Heqing Xu ,&nbsp;Haoji Yang ,&nbsp;Zijing Zhang","doi":"10.1016/j.optlaseng.2025.108890","DOIUrl":"10.1016/j.optlaseng.2025.108890","url":null,"abstract":"<div><div>Sequential quadratic programming (SQP) and the finite element method (FEM) are employed simultaneously to design on-chip wavelength-division demultiplexers exhibiting ultra-high density and ultra-high performance characteristics. To ensure precise and effective design, SQP is utilized to build an iterative optimization architecture. In the meantime, FEM is used to closely monitor the generated optical field to guarantee the demultiplexer's great and stable performance. This method is employed to construct ultra-compact four-, five-, six-, and seven-, eight-, nine-channel WDMs on a 450 nm thick silicon substrate with footprints of 1.5 μm × 1.5 μm and 1.8 μm × 1.8 μm, respectively. The four-channel WDM has an average transmission efficiency of 79.25 % with wavelengths ranging from 1290 to 1570 nm. The five-channel WDM has an average efficiency of 82.58 %, ranging from 1280 to 1490 nm. The six-channel WDM has an average efficiency of 78.4 %, ranging from 1000 to 1520 nm. The seven-channel WDM has an average efficiency of 79.51 %, ranging from 1010 to 1615 nm. The eight-channel WDM has an average efficiency of 78.74 %, ranging from 1190 to 1625 nm. The nine-channel WDM has an average efficiency of 76.47 %, ranging from 1195 to 1625 nm. Also, the crosstalk characteristics of the WDMs vary across different channels. Specifically, the crosstalk values for the four- to nine-channel WDMs range from −17.51 dB to −2.39 dB. Moreover, we determined that the device's width tolerance is 20 nm and the thickness tolerance is 100 nm. The four-, five-, and six-channel WDMs are devised to deliver a considerable improvement in transmission efficiency while keeping a more compact size when compared to the previously reported on-chip WDM. Additionally, the designed seven-, eight-, and nine-channel WDMs not only retained this benefit but also showed an even better ability to achieve extremely small size requirements for highly efficient beam splitting, thereby creating a new standard for multichannel beam splitting applications in integrated photonics. This findings open up new avenues for designing ultra-compact integrated devices, which should significantly increase the viability and variety of photonic circuit structural design and usher in a new era of micro- and nano-photonic integration technology.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108890"},"PeriodicalIF":3.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480078","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":"Universal phase retrieval transformer for single-pattern structured light three-dimensional imaging","authors":"Jianwen Song ,&nbsp;Kai Liu ,&nbsp;Arcot Sowmya ,&nbsp;Changming Sun","doi":"10.1016/j.optlaseng.2025.108903","DOIUrl":"10.1016/j.optlaseng.2025.108903","url":null,"abstract":"<div><div>Deep learning-based single-pattern phase retrieval methods for structured light three-dimensional imaging have shown significant performance improvement over traditional methods. However, these methods are typically designed for datasets containing patterns with a particular frequency and coding direction. To address this limitation, we propose a universal phase retrieval transformer (UPRT) for single-pattern structured light three-dimensional imaging, which can handle patterns across various frequencies and coding directions. Specifically, we propose a two-dimensional frequency filtering block by analyzing a single pattern from the perspective of the frequency domain, allowing adaptive extraction of frequency components. Additionally, a line-based frequency processing block is proposed to capture both vertical and horizontal features in the frequency domain, and a simple yet effective frequency processing method is designed to achieve information interactions within lines and channels for this block. Experiments on single-pattern phase retrieval demonstrate that UPRT achieves state-of-the-art performance, with a 10.3% improvement over traditional methods. Furthermore, the proposed UPRT achieves robust results across patterns with diverse frequencies and coding directions, demonstrating its strong generalization abilities. Source code is avaliable at <span><span>https://github.com/jianwensong/UPRT</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"188 ","pages":"Article 108903"},"PeriodicalIF":3.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}