Optics and Lasers in Engineering最新文献

Light field Laparoscope imaging model and calibration method based on flexible aperture-angular plane 基于柔性光圈-角平面的光场腹腔镜成像模型和校准方法

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-05 DOI: 10.1016/j.optlaseng.2024.108676

引用次数: 0

Wafer chamfering grinding wheels dressing via dynamic deflection laser beam 通过动态偏转激光束修整晶片倒角砂轮

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-04 DOI: 10.1016/j.optlaseng.2024.108673

引用次数: 0

Full polarimetric evaluation of the anamorphic transfer function for pixelated liquid crystal microdisplays 对像素化液晶微型显示器的拟态传递函数进行全面偏振评估

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-04 DOI: 10.1016/j.optlaseng.2024.108670

{"title":"Full polarimetric evaluation of the anamorphic transfer function for pixelated liquid crystal microdisplays","authors":"","doi":"10.1016/j.optlaseng.2024.108670","DOIUrl":"10.1016/j.optlaseng.2024.108670","url":null,"abstract":"<div><div>Spatial Light Modulators (SLMs) employing phase-only modulation typically rely on parallel-aligned liquid crystal on silicon (PA-LCoS) microdisplays, known for their high resolution and small pixel size. However, the performance of high-definition pixelated SLM devices is affected by various interpixel cross-talk degradation effects, that manifest differently depending on the orientation and the spatial frequency profile displayed on the microdisplay. This study explores, both experimentally and numerically, the anamorphic spatial frequency transfer function for pixelated PA-LCoS devices. In particular, we focus on the impact of high-frequency binary phase grating profiles with the grating vector parallel and perpendicular to the alignment direction defined by the alignment layer. Experiments are performed with a commercial PA-LCoS microdisplay with eight-micron size pixels. Novel full Stokes light analysis (polarimetric study) of the diffraction orders and diffraction efficiency measurements (radiometric study) provides a deep insight into the anisotropic phenomena involved, showing not only anamorphic degradation in the radiometric but also in the polarimetric performance and dependent on the applied voltage. Computed rigorous electromagnetic numerical results show a very good agreement with the experimental ones. The numerical computation is an essential tool since it enables the connection of the far-field evaluation with the microscopic level: the 3D distribution of the LC director and the near-field values of the illuminating electromagnetic field are known for each applied voltage onto the PA-LCoS microdisplay and show evidence for the anamorphic results in the far-field. Through this rigorous combined radiometric-polarimetric computing approach, we provide evidence of the impact of smaller pixel sizes in this SLM technology and for different fill-factors.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579048","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}

引用次数: 0

Highly-secure scattering-media-based key storage 基于散射介质的高安全性密钥存储

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-04 DOI: 10.1016/j.optlaseng.2024.108613

引用次数: 0

Enhanced light field depth estimation through occlusion refinement and feature fusion 通过遮挡细化和特征融合加强光场深度估算

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-04 DOI: 10.1016/j.optlaseng.2024.108655

引用次数: 0

Detecting topological charge and phase of the vortex beam embedded into the low coherence background 探测嵌入低相干背景的涡旋束的拓扑电荷和相位

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-02 DOI: 10.1016/j.optlaseng.2024.108668

引用次数: 0

Cascaded Fabry-Perot cavity and fiber Bragg grating on sapphire fibers for high-temperature strain sensing 用于高温应变传感的蓝宝石光纤上的级联法布里-珀罗腔和光纤布拉格光栅

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-01 DOI: 10.1016/j.optlaseng.2024.108674

引用次数: 0

Impact of axial chromatic aberration on color-multiplexed differential phase contrast microscopy: A quantitative study 轴向色差对彩色多路相差显微镜的影响：定量研究

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-11-01 DOI: 10.1016/j.optlaseng.2024.108660

{"title":"Impact of axial chromatic aberration on color-multiplexed differential phase contrast microscopy: A quantitative study","authors":"","doi":"10.1016/j.optlaseng.2024.108660","DOIUrl":"10.1016/j.optlaseng.2024.108660","url":null,"abstract":"<div><div>Color-multiplexed differential phase contrast (cDPC) imaging relies on deconvolving phase gradient images with phase transfer function (PTF) to extract quantitative phase information. Typically, the PTF used in the deconvolution process is assumed to be ideal. However, in practice, the presence of axial chromatic aberration causes actual PTF deviates from the ideal state, further reducing the phase reconstruction accuracy in cDPC. Therefore, the axial chromatic aberration is closely associated with the phase reconstruction accuracy in cDPC. Nevertheless, there is still a lack of quantitative methods to analyze the impact of axial chromatic aberration on the phase reconstruction accuracy of cDPC system. In this study, we propose a method to quantify the effect of axial chromatic aberration on phase reconstruction quality. This approach involves analyzing the error in the PTF affected by axial chromatic aberration, compared to the ideal PTF. Simulation and experimental results have validated the effectiveness of the proposed method. Furthermore, by computing PTF errors across different imaging plane positions, we determine the imaging plane position that has minimal phase reconstruction error in cDPC. Compared to the traditional approach of determining the optimal imaging plane position through image contrast in experiment, the imaging plane position determined by our method has smaller phase reconstruction error and fewer reconstruction artifacts.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572565","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

3D single pixel imaging based on parallel measurement with quadrant detector 基于象限探测器平行测量的三维单像素成像技术

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-31 DOI: 10.1016/j.optlaseng.2024.108671

{"title":"3D single pixel imaging based on parallel measurement with quadrant detector","authors":"","doi":"10.1016/j.optlaseng.2024.108671","DOIUrl":"10.1016/j.optlaseng.2024.108671","url":null,"abstract":"<div><div>Structured light three-dimensional (3D) imaging has advantages such as high accuracy, high resolution, and non-contact, and has enormous application value in fields such as automotive manufacturing and cultural relic detection. However, it often requires multiple structured light encoding to obtain 3D information, thus limiting the speed of 3D imaging. Single pixel imaging (SPI) technology, due to its use of structured light and single point detection to jointly obtain image information, can simply achieve simultaneous detection of multi-dimensional information through a single pixel detector array. Therefore, the structured light 3D imaging technology is combined with the single-pixel technology of multi-channel quadrant sensing, and the modulation of three structured light fields of red, green, and blue light is achieved separately through the decoupling of spatial 3D information and spectral dimension information. Combined with a quadrant sensing detector integrated with red, green, and blue filtering, simultaneous measurement of three structured light field signals is achieved. Thus, a scheme demonstration is accomplished to improve the imaging speed of 3D imaging by three times through decoupling. Further combining Gray codes and optimizing Hadamard sequences using compressive sensing ensures the accuracy and imaging quality under undersampling of 3D imaging. The experimental results show that the RMSE of our method is only 0.0576 mm. This method can be further extended to achieve high-precision and high-quality 3D reconstruction using more channel structured light modulation and more spectral detector arrays in only one parallel measurement.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552487","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

Fast complete Mueller matrix polarimetry microscopy using a single polarization camera 使用单偏振相机快速完成穆勒矩阵偏振显微分析

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108650

引用次数: 0