Augmented reality(AR)displays have gained significant attention for their ability to blend the real and virtual worlds seamlessly.However,they face challenges like the vergence-accommodation conflict and a limited eye...Augmented reality(AR)displays have gained significant attention for their ability to blend the real and virtual worlds seamlessly.However,they face challenges like the vergence-accommodation conflict and a limited eyebox.The AR community is actively seeking lightweight,integrative optical elements to overcome these limitations.In this study,we demonstrate a three-dimensional varifocal meta-device for AR display.The meta-device is composed of three cascaded metasurfaces with Moiréand off-center Fresnel lens phase profiles designed to dynamically manipulate the focus point in three-dimensional space.The cascaded metasurfaces are designed and fabricated by the TiO_(2)nanopillars with varying diameters,which are polarizationinsensitive for light field manipulation.The focal point position is precisely controlled by the relative rotation between the metasurfaces.The meta-device achieves an effective focal length ranging from 3.7 mm to 33.2 mm and can adjust the lateral focal point within the same range.The dynamic eyebox size varies from 4.2 mm to 5.8 mm.This lightweight,integrated meta-device is well-suited for various imaging applications,including AR displays,as it simultaneously addresses the vergence-accommodation conflict and expands the eyebox.展开更多
Seismological Bureau of Sichuan Province, Chengdu 610041, China2) Center for Analysis and Prediction, State Seismological Bureau, Beijing 100036, China3) Observation Center for Prediction of Earthquakes and Volcanic E...Seismological Bureau of Sichuan Province, Chengdu 610041, China2) Center for Analysis and Prediction, State Seismological Bureau, Beijing 100036, China3) Observation Center for Prediction of Earthquakes and Volcanic Eruptions, Faculty of Sciences, Tohoku University, Sendai 98077, Japan展开更多
Complex field modulation(CFM)has found a plethora of applications in physics,biomedicine,and instrumentation.Among existing methods,superpixel-based CFM has been increasingly featured because of its advantages in high...Complex field modulation(CFM)has found a plethora of applications in physics,biomedicine,and instrumentation.Among existing methods,superpixel-based CFM has been increasingly featured because of its advantages in high modulation accuracy and its compatibility with high-speed spatial light modulators(SLMs).Nonetheless,the mainstream approach based on binary-amplitude modulation confronts limitations in optical efficiency and dynamic range.To surmount these challenges,we develop binary phase-engraved(BiPE)superpixel-based CFM and implement it using the phase light modulator(PLM)—a new micro-electromechanical system-based SLM undergoing development by Texas Instruments in recent years.Using BiPE superpixels,we demonstrate highaccuracy spatial amplitude and phase modulation at up to 1.44 kHz.To showcase its broad utility,we apply BiPEsuperpixel-based CFM to beam shaping,high-speed projection,and augmented-reality display.展开更多
1.INTRODUCTION The rapid advancement of augmented reality(AR)and virtual reality(VR)technologies has stimulated substantial innovation in the display industry,particularly in front-panel technology advancements.To pro...1.INTRODUCTION The rapid advancement of augmented reality(AR)and virtual reality(VR)technologies has stimulated substantial innovation in the display industry,particularly in front-panel technology advancements.To provide immersive and high-quality contents in AR/VR devices,displays must support a wide color gamut that reproduces vivid colors.Ideally,such displays should satisfy the rigorous requirements of the Rec.2020 standard,which defines the color space for ultrahigh-definition television.1 Therefore,next-generation displays demand the convergence of high color purity,high-resolution,and high device performance(Figure 1A).展开更多
基金The National Key R&D Program of China(Grant Nos.2022YFA1404700)the Major Key Project of PCL(PCL2024A01)+7 种基金Shenzhen Municipal Basic Research(Key Project)(JCY20241202123919027)the National Natural Science Foundation of China(Nos.62305184)Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515012932)Science,Technology and Innovation Commission of Shenzhen Municipality(WDZC20220818100259004)the Research Grants Council of the Hong Kong Special Administrative Region,China[Project No.C5031-22GCityU11310522CityU11300123]City University of Hong Kong[Project No.9610628].
文摘Augmented reality(AR)displays have gained significant attention for their ability to blend the real and virtual worlds seamlessly.However,they face challenges like the vergence-accommodation conflict and a limited eyebox.The AR community is actively seeking lightweight,integrative optical elements to overcome these limitations.In this study,we demonstrate a three-dimensional varifocal meta-device for AR display.The meta-device is composed of three cascaded metasurfaces with Moiréand off-center Fresnel lens phase profiles designed to dynamically manipulate the focus point in three-dimensional space.The cascaded metasurfaces are designed and fabricated by the TiO_(2)nanopillars with varying diameters,which are polarizationinsensitive for light field manipulation.The focal point position is precisely controlled by the relative rotation between the metasurfaces.The meta-device achieves an effective focal length ranging from 3.7 mm to 33.2 mm and can adjust the lateral focal point within the same range.The dynamic eyebox size varies from 4.2 mm to 5.8 mm.This lightweight,integrated meta-device is well-suited for various imaging applications,including AR displays,as it simultaneously addresses the vergence-accommodation conflict and expands the eyebox.
文摘Seismological Bureau of Sichuan Province, Chengdu 610041, China2) Center for Analysis and Prediction, State Seismological Bureau, Beijing 100036, China3) Observation Center for Prediction of Earthquakes and Volcanic Eruptions, Faculty of Sciences, Tohoku University, Sendai 98077, Japan
基金supported in part by the Natural Sciences and Engineering Research Council of Canada(Grant Nos.RGPIN-2024-05551,ALLRP 592389-23)the Canada Research Chairs Program(Grant No.CRC-2022-00119)the Fonds de Recherche du Québec–Nature et Technologies(Grant Nos.203345–Centre d’Optique,Photonique,et Lasers).
文摘Complex field modulation(CFM)has found a plethora of applications in physics,biomedicine,and instrumentation.Among existing methods,superpixel-based CFM has been increasingly featured because of its advantages in high modulation accuracy and its compatibility with high-speed spatial light modulators(SLMs).Nonetheless,the mainstream approach based on binary-amplitude modulation confronts limitations in optical efficiency and dynamic range.To surmount these challenges,we develop binary phase-engraved(BiPE)superpixel-based CFM and implement it using the phase light modulator(PLM)—a new micro-electromechanical system-based SLM undergoing development by Texas Instruments in recent years.Using BiPE superpixels,we demonstrate highaccuracy spatial amplitude and phase modulation at up to 1.44 kHz.To showcase its broad utility,we apply BiPEsuperpixel-based CFM to beam shaping,high-speed projection,and augmented-reality display.
基金supported by National Research Foundation of Korea(NRF)grants funded by the Ministry of Science and ICT,Korea:RS-2022-NR068226(2022M3H4A1A04096380)and RS-2024-00416583.
文摘1.INTRODUCTION The rapid advancement of augmented reality(AR)and virtual reality(VR)technologies has stimulated substantial innovation in the display industry,particularly in front-panel technology advancements.To provide immersive and high-quality contents in AR/VR devices,displays must support a wide color gamut that reproduces vivid colors.Ideally,such displays should satisfy the rigorous requirements of the Rec.2020 standard,which defines the color space for ultrahigh-definition television.1 Therefore,next-generation displays demand the convergence of high color purity,high-resolution,and high device performance(Figure 1A).
