Applied optics最新文献

Compressed sensing 3D ISAR imaging method integrating multi-angle observations and a physical scattering model embedding. 结合多角度观测和物理散射模型嵌入的压缩感知三维ISAR成像方法。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.579562

Yufeng Yang, Qing Wei

{"title":"Compressed sensing 3D ISAR imaging method integrating multi-angle observations and a physical scattering model embedding.","authors":"Yufeng Yang, Qing Wei","doi":"10.1364/AO.579562","DOIUrl":"https://doi.org/10.1364/AO.579562","url":null,"abstract":"Traditional inverse synthetic aperture radar imaging suffers from the loss of three-dimensional (3D) target information and geometric distortion caused by fixed rotation axes in single-view observations. To address these limitations, this study proposes a multi-angle, physically precise enhancement method. By constructing 80 collaborative observation perspectives to achieve full-angle coverage, structural occlusion is resolved using 3D point-cloud fusion and registration techniques. By linking the rotation center to the radar line of sight in real time, rather than using a preset fixed axis, the rotation center offset error is fundamentally eliminated while a motion-imaging coupling mechanism suppresses cross-resolution unit migration. In addition, a parameterized target-component scattering model embedded with physically accurate differentiated radar cross-section characteristics is introduced to ensure feature consistency through multi-channel joint reconstruction. Application results show that this method improves target-structure recognition to 92%, increases 3D reconstruction efficiency by 40%, and reduces geometric distortion by 62%, thereby meeting the requirements of high-precision military target recognition.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"65 12","pages":"E37-E45"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147793971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-precision camera calibration via perspective distortion correction using a hybrid chessboard-circle target. 高精度摄像机标定通过透视畸变校正使用混合棋盘圆目标。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.580017

Guanghao Li, Jinyue Liu, Xiaohui Jia, Lei Jin, Xingkun Yang

{"title":"High-precision camera calibration via perspective distortion correction using a hybrid chessboard-circle target.","authors":"Guanghao Li, Jinyue Liu, Xiaohui Jia, Lei Jin, Xingkun Yang","doi":"10.1364/AO.580017","DOIUrl":"https://doi.org/10.1364/AO.580017","url":null,"abstract":"Camera calibration is a critical prerequisite for precision optical measurement systems. Traditional methods predominantly rely on either chessboard or circular calibration targets, each exhibiting inherent limitations. Chessboard targets facilitate straightforward corner detection but suffer from relatively low localization accuracy. Circular targets enable high-precision center extraction but are susceptible to systematic errors induced by perspective distortion, which causes the projected ellipse center to deviate from the true physical circle center (eccentricity error). To overcome these limitations, this paper introduces a high-precision camera calibration method that leverages a novel, to our knowledge, hybrid calibration board embedding circular markers within a chessboard pattern. The proposed approach first detects readily detectable chessboard corners to compute a homography matrix, which rectifies local image regions parallel to the imaging plane, thereby transforming the elliptical marker projections into approximately circular shapes. The centers of these corrected markers are accurately extracted using image moments. Subsequently, an inverse perspective transformation projects the centers back to the original image plane to obtain their precise pixel coordinates, effectively mitigating the perspective-induced eccentricity error. Camera calibration is then performed using Zhang's method with the refined coordinates. Extensive experiments demonstrate that the proposed method achieves an average reprojection error of 0.0365 pixels, representing a significant improvement of 51.13% compared to the traditional chessboard pattern and 35.05% compared to the circle pattern.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"65 12","pages":"E12-E21"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147793975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiband orthometric polarization sensitivity electromagnetically induced transparency-like effect on metamaterials. 多波段正交极化灵敏度对超材料的电磁诱导类透明效应。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.596970

Ningye He, Hui Liu, Xue Zhang, Renxia Ning

引用次数: 0

Method for designing a magic mirror system with a metalens. 一种带超透镜的魔镜系统设计方法。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.588895

Xin Ye, Ping Zhong, Fu Yang, Xinli Zheng, Xin Tang, Zhisong Li

{"title":"Method for designing a magic mirror system with a metalens.","authors":"Xin Ye, Ping Zhong, Fu Yang, Xinli Zheng, Xin Tang, Zhisong Li","doi":"10.1364/AO.588895","DOIUrl":"https://doi.org/10.1364/AO.588895","url":null,"abstract":"This paper introduces a design method for a Magic Mirror inspection system by incorporating a dielectric metalens to replace the conventional refractive relay lens group, thereby addressing the prevalent assembly errors and optical path redundancy. Optimized for narrowband illumination centered at 550nm, the metalens achieves full 0-2π phase coverage to facilitate rigorous system-level optical performance. Through rigorous coupled-wave analysis (RCWA) and ray-tracing synergy, the metalens-integrated system achieves a near-diffraction-limited performance, suppressing the on-axis RMS wavefront error to below 0.2λ and maintaining a highly comparable modulation transfer function (MTF) to traditional multi-element systems. Furthermore, compared to the conventional double-Gauss relay, which exhibits severe tolerance degradation (mean RMS wavefront error degrading to ∼3.4λ under Q1-level assembly errors), the monolithic metalens completely eliminates inter-element alignment errors. This approach offers a highly compact, robust, and alignment-free solution, improving the reliability of subsurface defect detection in applications utilizing narrowband illumination, such as semiconductor wafer inspection.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"65 12","pages":"4163-4171"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147794067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visible-light-band lateral dispersion multifocal metalens. 可见光波段横向色散多焦超透镜。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.591227

Chenyang Shuai, Jiyan Zhang, Yangyu Shen, Zhenyu Chen, Dongpei Zeng, Xingwang Li

引用次数: 0

Non-critical phase-matched 1.47 µm nanosecond optical parametric oscillator pumped at 1030 nm. 非临界相位匹配1.47µm纳秒光参量振荡器，泵浦波长为1030nm。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.593404

Jun Meng, Feilong Yang, Yuyuan Fan, Zhenhua Cong, Zhigang Zhao, Zhaojun Liu

引用次数: 0

Automated acquisition of phytoplankton microscopic images using bright-field and fluorescence tomographic imaging. 利用亮场和荧光层析成像自动获取浮游植物显微图像。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.590392

Min Xu, Gaofang Yin, Renqing Jia, Peng Yun, Xinru Wang, Tianhong Liang, Xiang Hu, Peng Huang, Min Zhang, Chao Zhu, Nanjing Zhao

{"title":"Automated acquisition of phytoplankton microscopic images using bright-field and fluorescence tomographic imaging.","authors":"Min Xu, Gaofang Yin, Renqing Jia, Peng Yun, Xinru Wang, Tianhong Liang, Xiang Hu, Peng Huang, Min Zhang, Chao Zhu, Nanjing Zhao","doi":"10.1364/AO.590392","DOIUrl":"https://doi.org/10.1364/AO.590392","url":null,"abstract":"The automated phytoplankton analysis relies on high-quality microscopic images. However, conventional microscopy in thick counting chambers is limited to a single focal plane. This, together with impurity interference, causes cells distributed at other depths to be missed, leading to substantial quantification errors. To address the problem, we employ a dual-optical-path imaging system combined with tomographic scanning, utilizing fluorescence signals for localization to extract in-focus phytoplankton images from bright-field sequences via the image clarity evaluation method. The comparative analysis demonstrates high consistency with manual acquisition, maintaining a relative counting error below 10%. In high-impurity environments, the method sustains a missed detection rate of ≤10%, significantly outperforming manual counting. This work provides a reliable, interference-resistant strategy for image acquisition in complex conditions and provides reliable technical support for microscopic imaging of the phytoplankton analysis.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"65 12","pages":"3920-3929"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147793942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation-based LiDAR wind sensing using SiPM: methodology and indoor validation. 基于SiPM的相关激光雷达风感：方法和室内验证。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.589122

Guochao Li, Xiaonan Tao, Zhihao Liu, Hui Zhao, Kefu Liu, Jian Qiu

引用次数: 0

Ground-state cooling of a mechanical resonator in a hybrid magnon squeezing magnomechanical system. 混合磁振子压缩系统中机械谐振腔的基态冷却。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.589229

Qinghong Liao, Songyun Ouyang, Yongqiang Zeng, Shaoping Cheng

引用次数: 0

Investigation into factors affecting the surface reflection phenomenon of aspherical mirrors and improvement solutions. 影响非球面反射镜表面反射现象的因素及改进对策的探讨。

Applied optics Pub Date : 2026-04-20 DOI: 10.1364/AO.589970

Guilin Zhuang, Qian Yu, Zihao Zeng

{"title":"Investigation into factors affecting the surface reflection phenomenon of aspherical mirrors and improvement solutions.","authors":"Guilin Zhuang, Qian Yu, Zihao Zeng","doi":"10.1364/AO.589970","DOIUrl":"https://doi.org/10.1364/AO.589970","url":null,"abstract":"Spherical/aspherical mirrors are widely used in optical and imaging systems, but their reflectivity is affected by surface morphology. In order to improve the reflectivity of the mirror surface, this paper systematically studied the factors that cause diffraction effects on the mirror surface. First, a surface morphology model for ultra-precision turning of spherical/aspherical mirrors was established. Then, based on the surface morphology model, a reflectance model of the mirror surface was established. The diffraction effect on the surface of the mirror was simulated, and the core factor causing the diffraction effect on the mirror surface, namely the P-V value of the surface morphology, was obtained. In response to the broadband application requirements of spherical and non-spherical aluminum alloy mirrors in the visible to near-infrared wavelength range, the peak-to-valley value (Rz value) of the ultra-precision machined surface can be controlled within 13 nm to effectively suppress the diffraction effect on the mirror surface. This ensures that the specular reflectance of the mirror surface remains above 90%, thereby achieving effective suppression of diffraction phenomena. The relevant simulation results have also been experimentally verified, and a planning algorithm for cutting interpolation points is proposed, successfully controlling the reflectivity of the mirror surface at around 94%. This paper provides a theoretical basis for processing high-reflectivity spherical/aspherical mirrors.","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"65 12","pages":"4087-4099"},"PeriodicalIF":0.0,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147794075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0