We present a novel approach to resolving the vergence–accommodation conflict(VAC)in extended reality(XR)optics by introducing a quarter-waveplate(QWP)geometric phase lens(GPL)capable of triple wavefront modulation—f...We present a novel approach to resolving the vergence–accommodation conflict(VAC)in extended reality(XR)optics by introducing a quarter-waveplate(QWP)geometric phase lens(GPL)capable of triple wavefront modulation—focusing,defocusing,and non-modulating at infinity.This polarization-driven behavior is interpreted using contour trajectories on the Poincarésphere and compared against conventional half-waveplate(HWP)GPLs.Leveraging this property,we propose a bi-stacked QWP GPL module that enables nine distinct varifocal states through polarization-controlled input selection and output filtering.In contrast,HWP-based modules under equivalent stacking conditions are limited to four focal states.The QWP GPL module supports a compact varifocal system spanning a continuous depth range from 24.27 cm to infinity,with a 0.3-diopter interval aligned with the human visual comfort zone.Importantly,the number of representable focal depths scales as 3^(n)for n stacked layers,offering a(1.5)^(n)-fold improvement over the 2^(n)scaling of HWP systems.This enables finer depth transitions using fewer lens units while retaining both compactness and optical modularity,establishing a depth-switchable imaging platform that enhances visual comfort and depth fidelity in next-generation XR display systems.展开更多
In this paper,we propose a real-time incoherent digital holographic(IDH)recording system free from bias and twin-image noises.A motionless three-step polarization-encoded phase-shifter operating at 99 Hz is realized w...In this paper,we propose a real-time incoherent digital holographic(IDH)recording system free from bias and twin-image noises.A motionless three-step polarization-encoded phase-shifter operating at 99 Hz is realized with two electrically controllable birefringence-mode liquid crystal cells operating in tandem with a geometric phase lens and polarizers.Based on the proposed optical configuration,a coaxial straight-line self-interference IDH recording system is devised.Notably,the elimination of bias and twin-image noise from three phase-shifted images is demonstrated as a proof of concept.Moreover,complex-valued holographic video acquisitions with a resolution greater than 20 megapixels are demonstrated,with an effective acquisition frequency of33 Hz.展开更多
We propose a near-eye display optics system that supports three-dimensional mutual occlusion.By exploiting the polarization-control properties of a phase-only liquid crystal on silicon (LCoS),we achieve real see-throu...We propose a near-eye display optics system that supports three-dimensional mutual occlusion.By exploiting the polarization-control properties of a phase-only liquid crystal on silicon (LCoS),we achieve real see-through scene masking as well as virtual digital scene imaging using a single LCoS.Dynamic depth control of the real scene mask and virtual digital image is also achieved by using a focus tunable lens (FTL) pair of opposite curvatures.The proposed configuration using a single LCoS and opposite curvature FTL pair enables the self-alignment of the mask and image at an arbitrary depth without distorting the see-through view of the real scene.We verified the feasibility of the proposed optics using two optical benchtop setups:one with two off-the-shelf FTLs for continuous depth control,and the other with a single Pancharatnam–Berry phase-type FTL for the improved form factor.展开更多
基金supported by the National Research Foundation(NRF)funded by the Korean government(MSIT)(No.RS-2024-00416272).
文摘We present a novel approach to resolving the vergence–accommodation conflict(VAC)in extended reality(XR)optics by introducing a quarter-waveplate(QWP)geometric phase lens(GPL)capable of triple wavefront modulation—focusing,defocusing,and non-modulating at infinity.This polarization-driven behavior is interpreted using contour trajectories on the Poincarésphere and compared against conventional half-waveplate(HWP)GPLs.Leveraging this property,we propose a bi-stacked QWP GPL module that enables nine distinct varifocal states through polarization-controlled input selection and output filtering.In contrast,HWP-based modules under equivalent stacking conditions are limited to four focal states.The QWP GPL module supports a compact varifocal system spanning a continuous depth range from 24.27 cm to infinity,with a 0.3-diopter interval aligned with the human visual comfort zone.Importantly,the number of representable focal depths scales as 3^(n)for n stacked layers,offering a(1.5)^(n)-fold improvement over the 2^(n)scaling of HWP systems.This enables finer depth transitions using fewer lens units while retaining both compactness and optical modularity,establishing a depth-switchable imaging platform that enhances visual comfort and depth fidelity in next-generation XR display systems.
基金National Research Foundation of Korea(2019R1A2C1005531)Electronics and Telecommunications Research Institute(23ZH1300)Institute for Information and Communications Technology Promotion(2019-0-00001)。
文摘In this paper,we propose a real-time incoherent digital holographic(IDH)recording system free from bias and twin-image noises.A motionless three-step polarization-encoded phase-shifter operating at 99 Hz is realized with two electrically controllable birefringence-mode liquid crystal cells operating in tandem with a geometric phase lens and polarizers.Based on the proposed optical configuration,a coaxial straight-line self-interference IDH recording system is devised.Notably,the elimination of bias and twin-image noise from three phase-shifted images is demonstrated as a proof of concept.Moreover,complex-valued holographic video acquisitions with a resolution greater than 20 megapixels are demonstrated,with an effective acquisition frequency of33 Hz.
基金National Research Foundation of Korea(2022R1A2C2013455)Defense Acquisition Program Administration and Ministry of Trade,Industry and Energy of Korean government (UM22203RD2)+1 种基金Korea Creative Content Agency (R2022020033)Institute of Information&Communications Technology Planning&Evaluation(2020-0-00929)。
文摘We propose a near-eye display optics system that supports three-dimensional mutual occlusion.By exploiting the polarization-control properties of a phase-only liquid crystal on silicon (LCoS),we achieve real see-through scene masking as well as virtual digital scene imaging using a single LCoS.Dynamic depth control of the real scene mask and virtual digital image is also achieved by using a focus tunable lens (FTL) pair of opposite curvatures.The proposed configuration using a single LCoS and opposite curvature FTL pair enables the self-alignment of the mask and image at an arbitrary depth without distorting the see-through view of the real scene.We verified the feasibility of the proposed optics using two optical benchtop setups:one with two off-the-shelf FTLs for continuous depth control,and the other with a single Pancharatnam–Berry phase-type FTL for the improved form factor.
