Optics and Lasers in Engineering最新文献_第2页

Single-lens computational imaging system design for coupled aberration of blur and distortion 模糊与畸变耦合像差的单透镜计算成像系统设计

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-08 DOI: 10.1016/j.optlaseng.2025.109050

Rongshuai Zhang , Fanjiao Tan , Zongling Li , Zaiwu Sun , Changjian Yang , Qingyu Hou

{"title":"Single-lens computational imaging system design for coupled aberration of blur and distortion","authors":"Rongshuai Zhang , Fanjiao Tan , Zongling Li , Zaiwu Sun , Changjian Yang , Qingyu Hou","doi":"10.1016/j.optlaseng.2025.109050","DOIUrl":"10.1016/j.optlaseng.2025.109050","url":null,"abstract":"<div><div>Blur and distortion are the primary degradation effects caused by optical aberrations in imaging systems. Traditionally, researchers often treat these two effects as independent issues, leading to separate investigations on deblurring and distortion correction algorithms. However, large field of view (FOV) infrared single-lens systems frequently exhibit coupled aberrations, where blur amplifies distortion and distortion exacerbates image information loss. In such cases, conventional methods often lead to significant optical model deviations and poor restoration performance. To address this issue, we propose an optical coupled imaging model based on point spread function (PSF) peak position mapping, which simulates these coupled effects and enhances the accuracy of large-FOV single-lens imaging simulation. Additionally, we propose a one-step restoration algorithm for coupled aberrations to simultaneously correct both blur and distortion. Our coupled imaging model is established using differentiable methods, enabling the formation of an end-to-end framework for optical, deblurring, and distortion correction parameters. Through a series of comparative experiments conducted with 40°-80° FOV and the fabrication of a prototype lens with a 19mm focal length, we demonstrate that our method significantly improves image quality in large-FOV single-lens systems and achieves high-resolution imaging in the 8–14μm infrared band.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109050"},"PeriodicalIF":3.5,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916490","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

OAM optical fiber transmission with reduced bit error rate based on turbo code encoding/decoding and deep learning demodulation 基于turbo码编解码和深度学习解调的低误码率OAM光纤传输

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.optlaseng.2025.109061

Junbao Hu , Hanyu Pan , Xutao Mo , Dong Wang , Xianshan Huang , Yu Lei

{"title":"OAM optical fiber transmission with reduced bit error rate based on turbo code encoding/decoding and deep learning demodulation","authors":"Junbao Hu , Hanyu Pan , Xutao Mo , Dong Wang , Xianshan Huang , Yu Lei","doi":"10.1016/j.optlaseng.2025.109061","DOIUrl":"10.1016/j.optlaseng.2025.109061","url":null,"abstract":"<div><div>Deep learning-assisted OAM optical fiber transmission has become a hotspot because of its end-to-end and high-accurate demodulation characteristics. Recent studies report that nearly 100% recognition rate of demodulation can be achieved, but the actual bit error rate (BER) of data transmission is not very low. In order to maintain a high-accurate demodulation with high-fidelity transmission performance, we propose a feasible scheme that combines turbo code encoding/decoding and deep learning demodulation for OAM optical fiber communications. In the scheme, a turbo code encoder/decoder is designed as a bit error corrector and a pre-trained deep learning model is induced as an OAM mode demodulator, which ensures the high-accurate demodulation performance of OAM and the high-fidelity data transmission with reduced BER of the system. To verify the proposed scheme, we experimentally built an OAM optical fiber transmission system and transmitted a 256-grayscale image based on the system. A recognition rate of 99.69% and a transmission BER of 1.32 × 10<sup>–3</sup> demonstrate the excellent performance. In addition, better transmission performance can be achieved when combined with an improved OAM mapping strategy. Our scheme can be a new perspective for high-performance OAM fibre transmission.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109061"},"PeriodicalIF":3.5,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143911769","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

Flight strain measurement of helicopter rotor blade flaps using fiber grating 用光纤光栅测量直升机旋翼襟翼的飞行应变

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.optlaseng.2025.109037

Jiahong Zheng , Weizhen Cheng , Shuaike Jiao , Xide Li

{"title":"Flight strain measurement of helicopter rotor blade flaps using fiber grating","authors":"Jiahong Zheng , Weizhen Cheng , Shuaike Jiao , Xide Li","doi":"10.1016/j.optlaseng.2025.109037","DOIUrl":"10.1016/j.optlaseng.2025.109037","url":null,"abstract":"<div><div>Traditional electrical strain gauges face limitations in rotor blade applications due to complex wiring, susceptibility to electromagnetic interference susceptibility, and reliability issues. This study presents a Fiber Bragg Grating (FBG) based in-flight strain measurement system that overcomes these challenges by leveraging the FBG sensors' compactness, electromagnetic immunity, and suitability for distributed measurements of FBG sensors. A key innovation is the direct integration of the system into the rotor hub without slip rings or optical connectors, which significantly simplifying simplifies deployment and enhancing enhances robustness. Comparative validation against electrical strain gauges and theoretical models on an equal-strength beam confirmed the accuracy of FBG measurements. Ground and flight tests on a helicopter demonstrated real-time, interference-free strain measuring during blade elastic deformation, with FBG data closely aligning closely with conventional gauge results. Critically, the system’s installation did not affect helicopter performance, as confirmed by pilot evaluations. Furthermore, analysis of blade flap strain trends under diverse flight conditions provides valuable insights for blade design optimization. This work advances rotor blade monitoring by establishing a reliable, lightweight solution for complex electromagnetic environments, addressing critical gaps in existing strain measurement methodologies.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109037"},"PeriodicalIF":3.5,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916489","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

Co-phase error detection of segmented mirrors based on polarization-multiplexing multi-wavelength dynamic interferometry 基于偏振复用多波长动态干涉的分段反射镜共相误差检测

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-06 DOI: 10.1016/j.optlaseng.2025.109031

Yicen Ma , Qun Yuan , Ziyan Teng , Weijian Liu , Zhishan Gao

{"title":"Co-phase error detection of segmented mirrors based on polarization-multiplexing multi-wavelength dynamic interferometry","authors":"Yicen Ma , Qun Yuan , Ziyan Teng , Weijian Liu , Zhishan Gao","doi":"10.1016/j.optlaseng.2025.109031","DOIUrl":"10.1016/j.optlaseng.2025.109031","url":null,"abstract":"<div><div>The performance of large-aperture telescopes of segmented mirrors is primarily determined by the co-phase metrics among segmented mirrors. This paper proposes a novel method, based on polarization-multiplexing multi-wavelength dynamic interferometry, to measure co-phase errors of segmented mirrors. This method merges two light sources into the orthogonally polarized beams serving as test and reference beams. These beams are regrouped before being recorded, allowing two polarization cameras to respectively record the interferograms at different wavelengths. Consequently, this approach enables simultaneous work for two light sources in a single optical path without crosstalk. By integrating spatial phase shifting, two polarization cameras each capture four phase-shifted interferograms in a single shot. The analysis of error amplification due to environmental disturbance demonstrated the superior environmental insensitivity capability of the proposed method. The feasibility of the proposed method was validated using the experimentally constructed interferometer, which adjusted the piston error of the two segmented mirrors from 40.6 μm to 9.73 nm. This approach minimizes errors caused by environmental disturbance and eliminates the need for high-speed response hardware and their mutual synchronization, offering an effective and economical solution for addressing co-phase errors in large-aperture telescopes of segmented mirrors.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109031"},"PeriodicalIF":3.5,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908300","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

Enhancing polarization contrast of skin of PS-OCT using an image integration method 利用图像积分法增强PS-OCT皮肤偏振对比

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-06 DOI: 10.1016/j.optlaseng.2025.109052

Ying Chang

{"title":"Enhancing polarization contrast of skin of PS-OCT using an image integration method","authors":"Ying Chang","doi":"10.1016/j.optlaseng.2025.109052","DOIUrl":"10.1016/j.optlaseng.2025.109052","url":null,"abstract":"<div><div>Multiple polarization parameters analysis methods directly lead to the problem of information redundancy and poor readability. Improving polarization image contrast and reducing redundant image information is a direct way to improve the efficiency of polarization information analysis. In this study, we investigate the two methods of the light propagation model and the exploration of the one unique form of canonical decomposition to obtain an integration method of the multiple polarization parameters (IMMPP). By combination of the expressions of 14 parameters, six 1st integrated parameters of axis, amplitude, and the components of degree of depolarization, and three 2nd integrated parameters of dichroism, birefringence, and depolarizance are derived and expressed. Ex vivo skin of a healthy mouse is imaged by PS-OCT, and images of integrated parameters are calculated. The results show that the 1st integrated parameters can be used for preliminary and large-scale monitoring of sample status, revealing several features with well contrast, and the 2nd integrated parameters can be used for small-range and efficient identification of sample local characteristics, retaining the advantage of high contrast, make up for the defect of blurred imaging at deeper depths with better contrast in the imaging depth. This approach is expected to support efficient and accurate disease diagnosis.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109052"},"PeriodicalIF":3.5,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908298","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

Error analysis and compensation in the design of 3D holograms using spatial segmentation layer-based method 基于空间分割层的三维全息图设计误差分析与补偿

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-05 DOI: 10.1016/j.optlaseng.2025.109055

Chi Hu, Jin Zhang, Shilei Jiang, Guobin Sun

{"title":"Error analysis and compensation in the design of 3D holograms using spatial segmentation layer-based method","authors":"Chi Hu, Jin Zhang, Shilei Jiang, Guobin Sun","doi":"10.1016/j.optlaseng.2025.109055","DOIUrl":"10.1016/j.optlaseng.2025.109055","url":null,"abstract":"<div><div>The development of 3D holographic display technology represents a promising advancement in future display methods. A critical aspect of this technology involves compensating for the positional deviation of reconstructed images associated with each sub-hologram in the spatial segmentation layer-based method design of three-dimensional holograms. However, a significant issue that has been inadvertently overlooked in the design process is the alignment between the digital blazed grating and the hologram itself. This alignment is often constrained by initial parameters and other factors, resulting in approximate rounding errors during the design process. In this paper, we analyze and compare the influence of these parameters on alignment accuracy, establishing an error calculation model based on theoretical analysis. We further determine the acceptable error tolerance and propose a compensation scheme to address these discrepancies. The results show that both our error analysis theory and compensation method are effective and accurate, providing valuable guidance for the future design of three-dimensional holograms utilizing spatial segmentation layer-based methods.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109055"},"PeriodicalIF":3.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904536","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

High-speed single-shot multiplane phase retrieval using quadratic distorted gratings for coherent diffraction imaging 高速单镜头多平面相位反演利用二次畸变光栅相干衍射成像

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-05 DOI: 10.1016/j.optlaseng.2025.109057

Chao Yang , Cheng Xu , Jun Lan , Hui Pang , Wei Yan , Lixin Zhao , Song Hu , Yan Tang , Xianchang Zhu

{"title":"High-speed single-shot multiplane phase retrieval using quadratic distorted gratings for coherent diffraction imaging","authors":"Chao Yang , Cheng Xu , Jun Lan , Hui Pang , Wei Yan , Lixin Zhao , Song Hu , Yan Tang , Xianchang Zhu","doi":"10.1016/j.optlaseng.2025.109057","DOIUrl":"10.1016/j.optlaseng.2025.109057","url":null,"abstract":"<div><div>Multi-plane coherent diffraction imaging reconstructs complex light fields from multiple axial diffraction intensities. However, the time overhead caused by multiple recordings limits the observation of fast dynamic processes, and the offset error during motion affects the reconstruction performance. We introduce a novel phase-retrieval method capable of capturing diffraction patterns from multiple planes in a single exposure, avoiding mechanical motion inherent in traditional methods. This method exploits the unique feature of quadratic distorted gratings, which have different focal lengths at different diffraction orders, thereby enabling the transportation of light fields from multiple planes to distinct regions within the detection plane and achieving spatial multiplexing. To recover the amplitude and phase maps from the segmented sub-intensity sequences within the detection plane, we employed an efficient algorithm known as single-beam multiple-intensity reconstruction with dual mean. The feasibility of the proposed method was validated through reconstruction experiments involving resolution targets and phase plates. Furthermore, given that the modulator used is a self-supporting pure amplitude element, this method is highly suitable for phase imaging with high spatiotemporal resolution in extreme ultraviolet, X-rays, and other short-wavelength segments.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109057"},"PeriodicalIF":3.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908299","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

Pixel super-resolution using compressive sensing for interferometric quantitative phase imaging 基于压缩感知的像素超分辨率干涉定量相位成像

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-05 DOI: 10.1016/j.optlaseng.2025.109045

Zhenghua Wang , Yin Li , Deyu Sun , Yujie Nie , Renjie Zhou , Min Long , Lianqing Liu , Yongliang Yang

{"title":"Pixel super-resolution using compressive sensing for interferometric quantitative phase imaging","authors":"Zhenghua Wang , Yin Li , Deyu Sun , Yujie Nie , Renjie Zhou , Min Long , Lianqing Liu , Yongliang Yang","doi":"10.1016/j.optlaseng.2025.109045","DOIUrl":"10.1016/j.optlaseng.2025.109045","url":null,"abstract":"<div><div>Interferometric quantitative phase microscopy (iQPM) with high resolution holds great potential for efficient and label-free investigation of biological systems. However, due to the limited spatial bandwidth product, there is a trade-off between the field of view (FOV) and spatial resolution, which hinders the applications of iQPM for large-scale in situ cellular phenotyping. To address this issue, we developed CS-iQPM, a method applying compressive sensing to capture sub-pixel signals in an iQPM image. In CS-iQPM, we first propose an efficient and easy-to-implement frequency ordering sampling scheme to reorder the Hadamard basis, according to which the mask was selected. This scheme outperforms random sampling as evaluated by three key metrices: peak signal-to-noise ratio, root mean square error, and structural similarity. We second integrated the iterative hard thresholding algorithm with pseudo-inverse matrix to improve the efficiency and structural similarity of reconstruction. Applying these two techniques to our iQPM, the CS-iQPM enhanced the pixel resolution from about 4 pixel/μm<sup>2</sup> using 10x objective lens to 64 pixel/μm<sup>2</sup> within 2 s. Experimental results demonstrated that CS-iQPM significantly enhanced the resolution of fine grid patterns and cells in quantitative phase images with a range larger than 500 μm. We envision that CS-iQPM could be applied to many high-throughput in situ cellular phenotyping applications, such as measuring cellular morphologies or cellular mechanical properties at sub-single-cell level in a monolayer during cell migrating.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"193 ","pages":"Article 109045"},"PeriodicalIF":3.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904535","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

Investigation of full polarization characteristics of aerosols and cloud particles with Stokes lidar 用Stokes激光雷达研究气溶胶和云粒子的全偏振特性

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-03 DOI: 10.1016/j.optlaseng.2025.109034

Xirui Ma , Hu Zhao , Yun Zhang , Jiandong Mao , Chunyan Zhou , Xin Gong , Zhimin Rao , Lingbing Bu , Dengxin Hua

{"title":"Investigation of full polarization characteristics of aerosols and cloud particles with Stokes lidar","authors":"Xirui Ma , Hu Zhao , Yun Zhang , Jiandong Mao , Chunyan Zhou , Xin Gong , Zhimin Rao , Lingbing Bu , Dengxin Hua","doi":"10.1016/j.optlaseng.2025.109034","DOIUrl":"10.1016/j.optlaseng.2025.109034","url":null,"abstract":"<div><div>Traditional polarization lidar has been widely used in the observation of atmospheric aerosol and cloud. To study the full polarization characteristics of aerosol and cloud particles and their variation with height more accurately, a new full polarization vector Stokes lidar system has been developed. A new method of eight-point online calibration of full Stokes parameters is proposed. The total root-mean-square (RMS) deviation of the full polarization vector Stokes after online calibration is 0.0016. The full polarization vector Stokes of aerosol and cloud can be detected in real time and with high precision by the system. Vertical structural changes in the full polarization characteristics of atmospheric aerosol and cloud particles under clear and cloudy skies were observed using the system. Results show that in clear sky, the absolute values of S<sub>1</sub>, S<sub>2</sub>, and S<sub>3</sub> above 3.2 km tend to be 0, with most aerosol particle morphologies spherical or spheroidal. Below 3.2 km, their absolute values are non-zero, indicating the presence of many non-spherical particles with directional scattering properties or complex structures. In cloudy sky, the absolute values of S<sub>1</sub>, S<sub>2</sub>, and S<sub>3</sub> at 3.4 km all show a second peak. The microphysical processes are active, with the highest number of non-spherical ice crystals or cloud droplets, and the particle morphology is complex. The study shows that the fully polarization vector Stokes is extremely sensitive to aerosol concentration, morphology and cloud particle detection. The lidar provides new methods for studying of aerosol classification, cloud phase detection, aerosol-cloud interaction, and microphysical properties.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109034"},"PeriodicalIF":3.5,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898717","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

A study on diffraction light spots with absolute central symmetry through Pancharatnam-Berry metasurface Pancharatnam-Berry超表面上绝对中心对称衍射光斑的研究

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2025-05-03 DOI: 10.1016/j.optlaseng.2025.109054

Aobo Wang , Liangping Xia , Chunyan Wang , Guohui Chen , Yilin Li , Wenqing Zhu , Qiaojun Yi , Zengbao Yang , Suihu Dang , Jingtian Lan , Chunlei Du

{"title":"A study on diffraction light spots with absolute central symmetry through Pancharatnam-Berry metasurface","authors":"Aobo Wang , Liangping Xia , Chunyan Wang , Guohui Chen , Yilin Li , Wenqing Zhu , Qiaojun Yi , Zengbao Yang , Suihu Dang , Jingtian Lan , Chunlei Du","doi":"10.1016/j.optlaseng.2025.109054","DOIUrl":"10.1016/j.optlaseng.2025.109054","url":null,"abstract":"<div><div>Traditional diffractive optical elements (DOEs) usually use random arrangement as the initial phase, and the asymmetric diffraction structure is obtained by optimization iteration. The processing error of asymmetric diffraction structure will introduce irregular speckle noise and expand the influence of structural mutation on the uniformity of diffraction spot, which is difficult to meet the requirements of absolute centrosymmetric diffraction. In this paper, a diffractive metasurface based on Pancharatnam-Berry (PB) phase is proposed. Using the chiral sensitivity of the PB phase to circularly polarized light, the absolute centrosymmetric spot modulation is realized by constructing the mirror phase. Through theoretical research and simulation analysis, the absolute centrosymmetric characteristics of one-dimensional diffractive metasurfaces are demonstrated. A two-dimensional diffraction beam-splitting metasurface with a wavelength of 632 nm was fabricated by electron beam lithography. The relationship between spot uniformity and central symmetry of diffraction orders when linearly polarized light (LP) is incident is experimentally analyzed, which expands the absolute central symmetry research of two-dimensional diffraction metasurfaces. Subsequently, according to the characteristic that the spot symmetry is modulated independently with the dimension, the tilt measurement of the misalignment system is carried out. Experiments show that this method can be used as a candidate method for optical system calibration.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":"192 ","pages":"Article 109054"},"PeriodicalIF":3.5,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902071","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