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design and Research of Large-Scale Curvature Adjustment optical Mirror

PHOTONICS 2025年第4期12卷 338-338页

作者： Zhao, Kailun Song, Liuxing Sun, Dewei Huang, Qiaolin Guo, Rongguang Tian, Guoliang He, Jinping Beijing Inst Space Mech & Elect Beijing 100094 Peoples R China Nanjing Univ Aeronaut & Astronaut Coll Astronaut Nanjing 211106 Peoples R China Beijing Key Lab Adv Opt Remote Sensing Technol Beijing 100094 Peoples R China

This study introduces an optimization design method for large-scale curvature-adjustable optical mirrors, innovatively integrating parametric modeling with the optimized layout of actuators, targeting the achievement of extensive curvature adjustability and high-precision surface correction for segmented mirrors. The optimization objective is based on the surface figure residual when the curvature radius of the segmented mirror is altered by 100 mm. Through the optimization of the number, arrangement, and thickness of reinforcement ribs of the actuators on the back of the segmented mirror, a parametric model of a segmented mirror with an edge-to-edge distance of 510 mm and a radius of curvature 9100 mm is developed. Simulation outcomes reveal that a 0-15 mu m variation in the actuators results in a curvature radius change of 178.45 mm in the segmented mirror, with a highly linear correlation, achieving a radius of curvature reconfiguration of the primary mirror in the optical system from 9100 mm to 9000 mm, with a residual surface figure error of less than 10 nm. The experimental results indicate that within a 0-15 mu m closed-loop stroke range, the curvature radius of the segmented mirror can be adjusted by 146.89 mm, fulfilling the design objective of a lightweight mirror with a significantly adjustable curvature radius. This research is anticipated to offer technical support and serve as a reference for the assembly, adjustment, and inspection of large-aperture segmented mirrors, as well as for the curvature radius variation in multiple segmented mirrors, thereby holding substantial practical value in engineering applications.

关键词： segmented mirror curvature radius adjustment parametric modeling actuators reconfiguration of large-aperture optical systems

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Nonreciprocal optomechanically induced transparency and enhanced ground-state cooling in a reversed-dissipation cavity system

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OPTICS EXPRESS 2024年第1期32卷 499-510页

作者： Zhang, Jiaming Li, Yueqian Zhang, Yan Northeast Normal Univ Ctr Quantum Sci Changchun 130024 Peoples R China Northeast Normal Univ Sch Phys Changchun 130024 Peoples R China

We explore the prospects of phase -modulated optical nonreciprocity and enhanced ground -state cooling of a mechanical resonator for the reversed -dissipation system, where the dissipative coupling between two cavities is realized through the adiabatic elimination of a low -Q mechanical mode, while a high -Q mechanical mode interacts with two mutually coupled cavities, forming a closed -loop structure. This unique system facilitates the nontrivial phenomenon of optomechanically induced transparency (OMIT), which exhibits asymmetry due to the frequency shift effect. We also observe the emergence of parity -dependent unidirectional OMIT windows (appearing under the phase -matching condition), which can be dynamically modulated by both the phase factors and the strength of the dissipative coupling. Furthermore, our study delves into the ground -state cooling effect operating within the reversed -dissipation regime. Intriguingly, the cooling effect can be significantly enhanced by carefully engineering dissipative complex coupling, such as in the phase -matching condition. The potential applications of this scheme extend to the fabrication of ideal optical isolators in optical communication systems and the manipulation of macroscopic mechanical resonators at the quantum level, presenting exciting opportunities in quantum technologies. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

关键词： Destructive interference optical systems Phase modulation Photonic crystals Quantum technology systems design

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Effective Mueller matrix analysis in VR systems using Ansys Zemax OpticStudio 6

Effective Mueller matrix analysis in VR systems using Ansys ...

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6th Conference on optical Architectures for Displays and Sensing in Augmented, virtual, and Mixed Reality-AR, VR, MR

作者： Hsiao, Yihua Zhang, Ling Chen, Yuan Matsumoto, Takashi Morales, Angel Ishikawa, Takashi Ansys Japan KK Shinjuku Ku 18F6-10-1 Nishishinjuku Tokyo Japan Ansys China 20F Verdant PlNo. 128West Nan Jing Rd Shanghai Peoples R China Ansys Inc 2600 Ansys Dr Canonsburg PA 15317 USA

ISBN: (纸本)9781510686069;9781510686076

Polarization analysis is crucial for optimizing VR systems, reducing unwanted reflections, enhancing image clarity, and improving contrast under varied lighting conditions. Traditional methods in lens design focus on ideal polarization components, such as perfect linear polarizers, and lack the ability to analyze real-world imperfections. This study introduces a workflow integrated into Ansys Zemax OpticStudio, enabling the analysis of imperfect polarization conditions, such as 10% depolarization, to simulate the realistic impact of non-ideal polarizers on the overall optical system. By modeling these imperfections and generating corresponding Mueller matrix maps, the workflow provides a comprehensive view of polarization transformations across the system's field of view. The results demonstrate how this approach streamlines polarization analysis, supports precise control under realistic conditions, and facilitates the design of high-performance VR optical systems, advancing both theoretical understanding and practical applications.

关键词： Mueller Matrix Ansys Zemax OpticStudio Polarization Analysis virtual Reality systems

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Independent modulation in full polarization multichannel wavefronts by spin-decoupled metasurface

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OPTICS EXPRESS 2025年第6期33卷 13332-13342页

作者： Li, FengXia Chen, HaiYan Yin, XiaoHan Yin, Jia-Yuan Deng, Jing-Ya Xidian Univ Sch Phys Xian 710071 Peoples R China Univ Elect Sci & Technol China Natl Engn Res Ctr Electromagnet Radiat Control Mat Key Lab Multispectral Absorbing Mat & Struct State Key Lab Elect Thin Film & Integrated Device Chengdu 610054 Peoples R China Southeast Univ State Key Lab Millimeter Waves Nanjing 210096 Peoples R China

With the growing scarcity of spectrum resources and the exponential rise in information transmission demand, improving channel capacity and spectrum utilization remains a significant challenge that has attracted considerable attention. The independent and free control of multi-polarization channels of wavefront has brought a promising solution to address this problem. This paper proposes what we believe is a novel approach that combines the propagation phase and PB phase to break the limitations of spin-locking and realize independent control of linearly and circularly polarized vortex beams for each distinct polarization channel. The partition design of spin-decoupled single-layer metasurface, which is proposed based on polarization conversion units by tailoring cross-polarized components, enables complete control of full polarization multichannel wavefronts. This approach has the potential to considerably reduce the design complexity while ensuring simultaneous and independent modulation of the topological charges, beam deflection angles (the angles deviating from theta =0 degrees, phi=0 degrees), and linearly and circularly polarizations of multichannel wavefronts, which is beneficial for increasing the information capability and improving communication efficiency. The theoretical design was verified through experimentation. This method can be applied to multichannel wavefronts control, polarization multiplexing and super-resolution imaging in microwave and optical systems.

关键词： optical imaging optical systems Phase shift Polarization Printed circuit boards Super resolution imaging

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Towards a mini-endoscope design with spatially selective excitation and imaging

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BIOMEDICAL OPTICS EXPRESS 2024年第3期15卷 1750-1760页

作者： Tabourin, Loic Bretzner, Frederic Galstian, Tigran Univ Laval Fac Sci & Engn Ctr Opt Photon & Lasers COPL Dept Phys Engn Phys & Opt Quebec City PQ G1V 0A6 Canada CHUL Neurosci Ctr Rech CHU Quebec 2705 Boul Laurier Quebec City PQ G1V 4G2 Canada Univ Laval Fac Med Dept Psychiat & Neurosci Quebec City PQ G1V 0A6 Canada

We describe a mini-endoscope design that uses a new type of electrically tunable liquid crystal lens array enabling the dynamic increase of spatial resolution by adjusting the working distance in various zones of interest over a relatively large field of view (FoV) without mechanical movement. The characterization of the system is performed by using uniform fluorescent films, fluorescent micro spheres and a tissue sample expressing the fluorescent calcium indicator GCaMP6s. Lateral resolution of up to 2 mu m over the FoV between 300 mu m400 mu m is experimentally demonstrated.

关键词： Liquid lenses Microspheres optical elements optical systems Spatial light modulators Spatial resolution

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A digital-twin and rapid optimization framework for optical design of indoor farming systems

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COMPUTATIONAL MECHANICS 2024年第1期74卷 31-43页

作者： Mengi, Emre Becker, Carla J. Sedky, Mostafa Yu, Shao-Yi Zohdi, Tarek I. Univ Calif Berkeley Dept Mech Engn Berkeley CA 94720 USA

In the face of a changing climate and a rising number of "food deserts" in both rural and urban areas, there is a demand to supply fresh produce year-round to communities at the end of the traditional agriculture supply chain. Vertical indoor farming is a promising mode of next-generation agriculture that boasts reduced water and pesticide usage, improved yields, more consistent quality, year-round cultivation, and cheaper transportation and harvesting costs. Indoor farms can rival industrial greenhouses in size, but small-scale "pod farms" can be deployed to smaller communities and areas where large swaths of land are either unavailable or too costly. These pods are often the size of shipping containers with their temperature, humidity, and plant nutrient supply carefully controlled. Plants inside the pods are grown hydroponically with light supplied by panels of LEDs and, thus, this mode of farming is fundamentally different from greenhouse farming. Many indoor farming pods have recently become commercially available claiming high energy efficiency, but little analysis and optimization work has been done to prove these claims. To drive innovation in the design of these physical systems, we have developed a digital-twin and genomic optimization framework for the optical design of vertical indoor farming pods. We model a completely enclosed indoor farming pod with plants in the three mutually-orthogonal planes and illuminated by LED "walls." We employ ray-tracing methods and a genetic algorithm to determine the LED source tube area size, beam aperture spread, and power requirements for maximal power absorption by the plants.

关键词： Indoor farming Optimization Agriculture Modeling and simulation Machine-learning

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Multi-colour reflective metagrating with neutral transparency for augmented reality

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OPTICS EXPRESS 2024年第15期32卷 25545-25559页

作者： Magno, Giovanni Dagens, Beatrice D'Orazio, Antonella Gauthier-Lafaye, Olivier Polytech Univ Bari Dept Elect & Informat Engn DEI Bari Italy Univ Paris Saclay Ctr Nanosci & Nanotechnol CNRS Palaiseau France Univ Toulouse LAAS INSA UPSCNRS Toulouse France

This paper presents the design and experimental validation of an all-dielectric and transparent metagrating-based metalens. Leveraging multiple guided mode resonances simultaneously, the metagrating enables the generation of two or more spectrally narrow reflection peaks. These peaks are achieved through the precise engineering of guided mode resonances, allowing for the reflection of a comb of vibrant and saturated colours. In addition to the investigation of underlying mechanisms, we introduce an analytical numerical method that facilitates rapid engineering of the spectral positions of the reflection peak comb. Experimental validation is provided for a bichromatic sample. Such metagrating can be promising for augmented reality systems, supporting individuals with mild to moderate cognitive impairments by delivering visual and textual stimuli that can improve indoor navigation, home safety, communication, and decision-making. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

关键词： Diffraction gratings Effective refractive index Near eye displays optical elements optical systems Waveguide modes

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Integrating the null testing of aspheres into the process of optical system design 10

Integrating the null testing of aspheres into the process of...

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10th Symposium on Novel Optoelectronic Detection Technology and Applications

作者： Zhang, Yulu Ma, Tao Zeng, Xinyue School of Optoelectronic Science and Engineering Soochow University Suzhou215006 China Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou215006 China

ISBN: (数字)9781510688155

ISBN: (纸本)9781510688148

Aspherical optics have more degrees of freedom than spherical optics and achieve complex design purposes for optical systems with fewer optical components. In this study, we introduce the concept of the Null Aspheric Surface (NAS), which is predicated on the principle of null wavefront compensation. The design parameters of the single-lens null compensation testing optical path are used as the characterization parameters for the surface form of the Null Aspheric Surface (NAS). This mathematical characterization of the aspheric surface can better determine the compensation scheme, effectively solve the problem of detectability, and significantly improve the efficiency of the aspheric surface design and detection. This study presents a surface, referred to as the Null Aspheric Surface (NAS), achieved in Zemax via a user-defined surface. © 2025 SPIE.

关键词： Aspherics

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Photoluminescent organic crystals and co-crystals

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JOURNAL OF MATERIALS CHEMISTRY C 2024年第27期12卷 9888-9913页

作者： Dar, Aijaz A. Malik, Asif A. Univ Kashmir Dept Chem Crystal Engn Lab Srinagar 190006 Jammu & Kashmir India

Crystal engineering is a potential strategy to design functional materials, including solid-state emitters. The design and development of organic emitters are of multi-fold significance as they are applied in fields ranging from biology to industry, defence and artificial intelligence. Herein, we discuss crystal engineering-based developments in crystalline organic solid-state emitters. We highlight the understanding and realization of emission tuning in multi-component crystalline materials and provide insights into their structure-property relationship, yielding important generalizations. Moreover, for the benefit of early researchers, a discussion on fundamental aspects such as mechanistic and crystal packing insights into solid-state emissions is provided. Subsequently, structure-property relationship studies are discussed considering the nature of pi-aggregates (H, J, X and I) and polymorphism. A comprehensive account of different classes of multi-component systems to realise emission tuning in organic crystals is provided, including recent advances such as the development of hetero-structures through epitaxial growth and hydrogen-bonded frameworks (HOFs), in addition to doping and co-crystallization. Finally, a concise summary and future outlook on the scope of crystal engineering intervention for the design of next-generation organic crystalline emissive materials are provided. This perspective highlights the significance of crystal engineering intervention in the design and development of applied optical materials.

关键词： Crystal engineering

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RCP design of RTX-based Composite optical Axis Stabilization 4

RCP Design of RTX-based Composite Optical Axis Stabilization

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4th International Conference on Machine Learning and Intelligent systems engineering (MLISE)

作者： Li, Yinlong Yu, Fei Huang, Gang Kang, Jianbing Lin, Zhe Beijing Inst Space Mech & Elect Beijing 100094 Haidian Peoples R China

ISBN: (纸本)9798350375084;9798350375077

In order to quickly realize the composite optical axis stabilization, this article develops a RTX-based Rapid Control Prototyping (RCP) system. The composite optical axis stabilization consists of inertial and optical-mechanical image stabilization, by reasonably decomposing the control range of which, the stabilization accuracy of the optical axis is improved. The RTX shared memory technology is used to separate the real-time domain from the non-real-time domain, realizing the real-time control and communication of each controller, and effectively improving the control bandwidth of the system. Experimental test shows that the real-time performance of the RCP platform meets the requirements, achieving functions such as the identification, control and testing of the composite optical axis stabilization system. Due to the generic design, the RCP platform is able to support subsequent control systems of the same type.

关键词： Rapid Control Prototyping RTX Composite Control Axis Stabilization

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