IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-22 DOI: 10.1016/j.ijleo.2025.172322

I. Sudha , Mohammed Ahmed Mustafa , R. Suguna , Sathishkumar Karupusamy , Veeraswamy Ammisetty , Shavkatov Navruzbek Shavkatovich , M. Ramalingam , Pratik Kanani

引用次数: 0

Retraction Notice “OFDM and MIMO wireless communication performance measurement using enhanced selective mapping based partial transmit sequences” [Optik 272 (2023) 170293] 撤回公告“使用基于部分传输序列的增强选择性映射测量OFDM和MIMO无线通信性能”[Optik 272 (2023) 170293]

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-22 DOI: 10.1016/j.ijleo.2025.172320

K. Tamilarasi , C.K. Shinzeer , Anupong Wongchai , R. Azhagumurugan , Mannava Yesubabu , Bharat Singh , Mahendran Arumugam

引用次数: 0

Cutting plano-convex cylindrical lenses with ultrafast Bessel laser beam 超快贝塞尔激光束切割平凸圆柱透镜

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-21 DOI: 10.1016/j.ijleo.2025.172368

Qiuchen Xie , Jiaqin Yang , Peng Liu , Tianfeng Zhou , Qian Yu , Sijiang Wang

{"title":"Cutting plano-convex cylindrical lenses with ultrafast Bessel laser beam","authors":"Qiuchen Xie , Jiaqin Yang , Peng Liu , Tianfeng Zhou , Qian Yu , Sijiang Wang","doi":"10.1016/j.ijleo.2025.172368","DOIUrl":"10.1016/j.ijleo.2025.172368","url":null,"abstract":"<div><div>While micro-cylindrical lenses are used in a wide variety of applications and are a core optical component in lasers and Light Detection and Ranging (LiDAR), etc. They are extremely difficult to cut. In this research, the peak power and ultrafast pulse of an ultrafast laser, as well as the long focal depth of the Bessel beam, were employed to make the Bessel beam incident from the bottom plane of a micro-cylindrical lenses, to ultimately produce a modified surface inside the lenses. The modified micro-cylindrical lenses can then absorb CO<sub>2</sub> laser energy with a wavelength of 10.6 μm and generate high thermal tension stress via the high rate of absorption rate of the CO<sub>2</sub> laser by the glass material, after this can be separated along the modified surface. Experimental results demonstrate that the factors affecting the cutting quality are primarily the laser incidence surface, the single-pulse energy, and the pulse modification spacing. Via the use of this method, the separation of a micro-cylindrical lens made of BK7 glass with R = 2 mm, F = 3.87 mm, and a width of 3 mm was successfully achieved. Furthermore, the maximum cutting speed reached 500 mm/s with a cut section roughness of 530 nm without any chipping or micro-cracking, thereby achieving good cutting quality and providing an effective method for the efficient cutting of micro-cylindrical lenses.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172368"},"PeriodicalIF":3.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectral, structural, and theoretical elucidation of a novel adenine-based crystalline salt: Insights from NMR, XRD, DFT, NBO and NLO studies 一种新型腺嘌呤基结晶盐的光谱、结构和理论解析：来自NMR、XRD、DFT、NBO和NLO研究的见解

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-18 DOI: 10.1016/j.ijleo.2025.172351

P. Pon Matheswari, J. Maria Libiyal, J. Ilavarasi Jeyamalar, B. Ravindran Durai Nayagam

{"title":"Spectral, structural, and theoretical elucidation of a novel adenine-based crystalline salt: Insights from NMR, XRD, DFT, NBO and NLO studies","authors":"P. Pon Matheswari, J. Maria Libiyal, J. Ilavarasi Jeyamalar, B. Ravindran Durai Nayagam","doi":"10.1016/j.ijleo.2025.172351","DOIUrl":"10.1016/j.ijleo.2025.172351","url":null,"abstract":"<div><div>This study investigates the novel proton-transfer system, Adeninium 2,3 pyridine dicarboxylate (ADH<sup>+</sup>PD<sup>-</sup>) derived from Adenine and 2,3 pyridine dicarboxylic acid. We determined its structural properties using SCXRD with a space group P1 n1. Frontier molecular orbital reveals distinct localization of HOMO and LUMO, indicating potential intermolecular charge transfers, and provides insights into regions of electron density. The atomic charge analysis results supported the SCXRD and HSA results, showing the formation of noncovalent interactions in organic crystalline salt. The results of the natural bond orbital (NBO) analysis confirmed the existence of (relatively weak) noncovalent interactions between the cation and anion moieties of the organic crystalline salt. UV–visible spectral studies were conducted to assess the suitability of the single crystal for various optical applications, revealing its excellence in linear optical transparency. Furthermore, Electron localization function (ELF), local orbital locator (LOL), and Reduced Density Gradient Analysis (RDG) were studied.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172351"},"PeriodicalIF":3.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BM3D optical image denoising algorithm based on SVD noise estimation 基于SVD噪声估计的BM3D光学图像去噪算法

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-18 DOI: 10.1016/j.ijleo.2025.172349

Wenli Zhang, Kaicheng Wang, Kefan Chen, Yirui Liu, Yi Wang, Junlei Zhi, Hao Chen, Yiping Wang

{"title":"BM3D optical image denoising algorithm based on SVD noise estimation","authors":"Wenli Zhang, Kaicheng Wang, Kefan Chen, Yirui Liu, Yi Wang, Junlei Zhi, Hao Chen, Yiping Wang","doi":"10.1016/j.ijleo.2025.172349","DOIUrl":"10.1016/j.ijleo.2025.172349","url":null,"abstract":"<div><div>Image denoising represents a crucial technique for recovering visual information, whereby irrelevant noise is effectively suppressed, thus enhancing the quality and recognition of the image. It has been demonstrated that existing image-denoising algorithms can achieve considerable denoising effects when the noise intensity is known. However, natural images are affected by multiple unknown noise sources during the generation and transmission processes. The unpredictable nature of the noise intensity often results in unsatisfactory image-denoising effects. Therefore, this paper proposes a block-matching three-dimensional cooperative filtering (BM3D) optical image denoising algorithm based on singular value decomposition (SVD) noise estimation. First, the optical image is decomposed by SVD. Then, using the tail of singular values to estimate the noise variance of the optical image. Subsequently, the noise estimated value is employed as prior information for BM3D, facilitating the denoising analysis of the optical image. The final step is to use the PSNR to evaluate the algorithm's effectiveness. Experimental results show that compared with the classical image denoising algorithm, the denoising effect of the algorithm in this paper can better preserve image details, reduce noise residue, and perform better in terms of visual effects and PSNR.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172349"},"PeriodicalIF":3.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimum design of permeable diffractive lenses based on photon sieves 基于光子筛的可渗透衍射透镜的优化设计

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-17 DOI: 10.1016/j.ijleo.2025.172342

Veronica Pastor-Villarrubia , Angela Soria-Garcia , Joaquin Andres-Porras , Jesus del Hoyo , Mahmoud H. Elshorbagy , Luis Miguel Sanchez-Brea , Javier Alda

{"title":"Optimum design of permeable diffractive lenses based on photon sieves","authors":"Veronica Pastor-Villarrubia , Angela Soria-Garcia , Joaquin Andres-Porras , Jesus del Hoyo , Mahmoud H. Elshorbagy , Luis Miguel Sanchez-Brea , Javier Alda","doi":"10.1016/j.ijleo.2025.172342","DOIUrl":"10.1016/j.ijleo.2025.172342","url":null,"abstract":"<div><div>Photon sieves are permeable diffractive optical elements generated by open apertures on a substrate. These elements are well suited for the monitoring of running fluids. Our analysis considers the fabrication constrains of the photon sieve and translate them into values of the optical parameters of the element. When used as focusing elements, or diffractive lenses, the spatial distribution of apertures can be designed to maximize the intensity at the focal plane and the permeability of the device. This is done by defining a weighted merit function. The computation time of this merit function is key when applying different strategies for the design, which often require a very large number of calculations of this merit function. Then, besides using a reliable propagation method, we have included an analytic solution applicable for circular apertures. Also, a geometrical merit function is proposed to simplify and reduce the computation even more. The methods proposed in this contribution are compared in terms of the focused irradiance and permeability parameters, allowing an educated choice adapted to the given case or application. In this contribution we analyze several methods to generate photon sieves in an optimum manner. The resulted spatial distributions resemble the classical Fresnel zone arrangement.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172342"},"PeriodicalIF":3.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving PPF algorithm for workpiece grasping with adaptive pose estimation 基于自适应姿态估计的工件抓取PPF算法改进

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-17 DOI: 10.1016/j.ijleo.2025.172345

Yifan Chen , Yuchen Jiang , Jianli Man , Sha Luo , Mingyue Zhang

{"title":"Improving PPF algorithm for workpiece grasping with adaptive pose estimation","authors":"Yifan Chen , Yuchen Jiang , Jianli Man , Sha Luo , Mingyue Zhang","doi":"10.1016/j.ijleo.2025.172345","DOIUrl":"10.1016/j.ijleo.2025.172345","url":null,"abstract":"<div><div>In order to achieve pose estimation for robotic arms in unstructured grasping scenarios, meeting the demands of unmanned and intelligent industrial production, research has been conducted on the unstructured grasping and pose estimation of robotic arms. Firstly, the scene point cloud was preprocessed, introducing an adaptive statistical filtering algorithm to address the denoising issues encountered in traditional statistical filtering. Subsequently, target extraction was performed using an improved PPF algorithm for point cloud registration. Finally, precise pose estimation was accomplished through ICP registration, and algorithm validation as well as grasping experiments were conducted on both public datasets and data collected in laboratory environments. The experimental results indicate: After conducting grasping experiments in the grasping environment of existing laboratory equipment, it is obtained that the pose recognition accuracy and grasping success rate of our algorithm reached 93. 23 % and 85. 61 %, respectively. The recognition time was 37. 21 seconds, and the total time consumed was 68. 33 seconds, meeting the requirements of the established applications. Therefore, under the rhythm conditions of industrial production, this method ensures the robustness and accuracy requirements of pose estimation, achieving satisfactory results.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172345"},"PeriodicalIF":3.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene-based frequency reconfigurable slot antenna for terahertz applications 用于太赫兹应用的基于石墨烯的频率可重构槽天线

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-17 DOI: 10.1016/j.ijleo.2025.172343

Khalid Subhi Ahmad , Ahmed Jamal Abdullah Al-Gburi

{"title":"Graphene-based frequency reconfigurable slot antenna for terahertz applications","authors":"Khalid Subhi Ahmad , Ahmed Jamal Abdullah Al-Gburi","doi":"10.1016/j.ijleo.2025.172343","DOIUrl":"10.1016/j.ijleo.2025.172343","url":null,"abstract":"<div><div>This research presents the design of a multi-band frequency reconfigurable slot antenna (FRSA) that utilizes graphene in the terahertz (THz) regime. The proposed FRSA supports independent switching across twenty-nine operating bands: 0.518, 0.532, 0.56, 0.59, 0.636, 0.648, 0.66, 0.682, 0.724, 0.752, 0.758, 0.84, 0.938, 0.906, 1.166, 1.252, 1.256, 1.26, 1.304, 1.324, 1.336, 1.344, 1.532, 1.648, 1.70, 1.784, 1.95, 2.01, and 2.064 THz. The design features a rectangular patch with both vertical and longitudinal slots and incorporates seven graphene switches (labeled d1–d7) placed along these slots. These switches enable reconfigurability by controlling the surface conductivity of the graphene. The tunable properties of graphene present significant potential for developing smaller, reconfigurable antennas in THz wireless systems. The proposed FRSA features a compact design with dimensions of 268 µm x 240 µm x 10 µm, or 0.46 λ₀ × 0.41 λ₀ × 0.017 λ₀, where λ₀ represents the wavelength corresponding to the lowest operating frequency of 0.518 THz in free space. The patch structure is mounted on a 10 μm thick substrate made of Rogers RO3003 (with <em>ε</em><sub><em>r</em></sub> = 3 and <em>tanδ</em> = 0.001). The surface conductivity of graphene sheets is adjustable by applying a bias voltage, which influences the chemical potential of the graphene. The FRSA operates in ten states (S1–S10), determined by the ON and OFF positions of the graphene sheets. An analysis of the antenna performance was conducted, examining the reflection coefficient, and gain at various chemical potentials. This switching capability enables secondary users to access unused frequency bands, making the antenna suitable for cognitive radio applications. Furthermore, this technology can be applied in medical settings, as the antenna can assist in identifying skin conditions and cancerous tissues. By switching between different frequencies, it can improve imaging quality and capture various types of data about the body being examined.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172343"},"PeriodicalIF":3.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A method of optimising the filter bandwidth of a spatially modulated full-polarisation imaging system 一种优化空间调制全偏振成像系统滤波器带宽的方法

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-16 DOI: 10.1016/j.ijleo.2025.172348

Zhixu Dong , Shu Yang , Mengnan Sun , Jiashun Si , Hao Yi

{"title":"A method of optimising the filter bandwidth of a spatially modulated full-polarisation imaging system","authors":"Zhixu Dong , Shu Yang , Mengnan Sun , Jiashun Si , Hao Yi","doi":"10.1016/j.ijleo.2025.172348","DOIUrl":"10.1016/j.ijleo.2025.172348","url":null,"abstract":"<div><div>In this study, a method of calculating the optimal filter bandwidth based on the watermark fringes of simulation interference was proposed to maintain the optimal performance of a spatially modulated full-polarisation imaging system in different target scenes, offering some theoretical guidance for the type selection of the imaging lens for the system. The two-dimensional sine function of the watermark fringes of simulation interference was superimposed on the intensity image, and a full-polarisation image was obtained by demodulating the simulation interferogram using the fast Fourier transform and the frequency-domain low-pass-filtering algorithm. Then, the polarisation image with the highest structural similarity to the intensity image was solved, and a method of calculating the optimal filter bandwidth based on the improved elitist clonal selection algorithm (ECSA) was presented. Next, the optimal focal length of the imaging lens was calculated in combination with the image resolutions, incident light wavelengths, and Savart polariser single-beam offsets selected in different target scenes, to complete the theoretical type selection. The experimental results showed that the spatially modulated full-polarisation imaging system constructed based on the optimal filter bandwidth had a good performance; and that, compared with empirical type selection, the proposed type selection based on the optimal filter bandwidth increased the spectral inversion area by 4.2 times and the image structural similarity by 71 %, significantly improving the polarisation imaging quality of the system.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172348"},"PeriodicalIF":3.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Competition between natural non-Hermitian linear and circular polarization dressing in ion-doped microcrystals Eu3 +: NaYF4 and Eu3+: BiPO4 离子掺杂微晶体Eu3 +:NaYF4和Eu3+: BiPO4中自然非厄米线偏振和圆偏振的竞争

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-15 DOI: 10.1016/j.ijleo.2025.172362

Faisal Munir , Iqbal Hussain , Muhammad Usman , Usman Javed , Muhammad Kashif Majeed , Faisal Nadeem , Muhammad Qasim Khan , Huanrong Fan , Yanpeng Zhang

{"title":"Competition between natural non-Hermitian linear and circular polarization dressing in ion-doped microcrystals Eu3 +: NaYF4 and Eu3+: BiPO4","authors":"Faisal Munir , Iqbal Hussain , Muhammad Usman , Usman Javed , Muhammad Kashif Majeed , Faisal Nadeem , Muhammad Qasim Khan , Huanrong Fan , Yanpeng Zhang","doi":"10.1016/j.ijleo.2025.172362","DOIUrl":"10.1016/j.ijleo.2025.172362","url":null,"abstract":"<div><div>We report the competition relationship between natural non-Hermitian linear and circular polarization dressings in Eu<sup>3+</sup>: BiPO<sub>4</sub> and Eu<sup>3+</sup>: NaYF<sub>4</sub>. We depict that, compare to narrowband excitation (one switch from spectral peak to spectral dip), three dressings lead to the linear or circular polarization signal transition from enhancement peak to suppression dip and to enhancement peak for Eu<sup>3+</sup>: NaYF<sub>4</sub> at broadband excitation due to high decay rate. The linear AT dip is accompanied by two times quantization switches (destructive to constructive, constructive to destructive), while circular AT splitting exhibits one time switch (destructive to constructive quantization) in Eu<sup>3+</sup>: BiPO<sub>4</sub> for narrowband excitation. However, the fluorescence (FL) and multi-Fano of spontaneous four wave mixing (SFWM) shows two circular polarization dressings (two strong dips), which are stronger than linear (one strong dip) at fixing detector. However, the linear and polarization dressing dips are strong due to weak constructive quantization, while strong circular polarization dressing dip comes from destructive quantization at different detectors. Notably, the linear-circular quantization difference results from Zeeman-like effect of CF and selected linear-circular dressing. These results infer a polarizer device that exhibit linear dressing seven times larger than circular dressing at weak quantization output port.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"329 ","pages":"Article 172362"},"PeriodicalIF":3.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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