Article
Biochemical Research Methods
Guangxing Wu, Serene Wen Ling Ng, Yan Zhou, Minghui Hong
Summary: Optical microscopic techniques are crucial for observing and extracting dynamic information from micro/nano-scale samples in microfluidic devices in biology and chemistry fields. However, current microfluidic imaging schemes face challenges in achieving high spatial and temporal resolutions simultaneously. The emergence of microsphere nanoscope offers a potential solution to address these challenges, with its high spatial resolution, real-time imaging abilities, and cost-effectiveness. In this study, a microsphere compound lens integrated microfluidic imaging device is proposed for real-time super-resolution imaging. The device exhibits superiority over single microsphere and conventional optical microscopes in discerning nano-objects beyond the diffraction limit and generating magnified images. Additionally, the device is experimentally demonstrated to be applicable in nanoparticle tracing and live-cell monitoring.
Article
Multidisciplinary Sciences
Yeon Ui Lee, Shilong Li, G. Bimananda M. Wisna, Junxiang Zhao, Yuan Zeng, Andrea R. Tao, Zhaowei Liu
Summary: The authors demonstrate a label-free superresolution imaging method using a hyperbolic material for tailored light-matter interactions. By enhancing scattering and utilizing dark-field detection, the resolution is improved by 5.5 times beyond the diffraction limit. This method provides capabilities for super-resolution imaging where fluorescence is not available or challenging to apply.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Weisong Zhao, Shiqun Zhao, Zhenqian Han, Xiangyan Ding, Guangwei Hu, Liying Qu, Yuanyuan Huang, Xinwei Wang, Heng Mao, Yaming Jiu, Ying Hu, Jiubin Tan, Xumin Ding, Liangyi Chen, Changliang Guo, Haoyu Li
Summary: High-throughput super-resolution (SR) imaging is attractive for rapid and high-precision profiling in biomedical applications. The proposed SACD method reduces the number of frames required for SR imaging and enables four-dimensional imaging of live cells and events. SACD improves accessibility to SR imaging and facilitates high-throughput and low-cost biological studies.
Article
Engineering, Electrical & Electronic
Lei Wang, Huan Deng, Fei-Yan Zhong, Cong Chen, Qiang Li
Summary: This paper introduces a depth-enhanced integral imaging display based on a bifocal lens array, which improves depth of field by generating two central depth planes and stitching two reconstructed 3-D images. Experimental results show that the proposed structure can reconstruct 3-D images with a depth of field as large as 150.8 mm, double that of conventional integral imaging displays.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2021)
Article
Multidisciplinary Sciences
Yin Zhou, Feng-Lin Kuang, Rui Li, Lei Li
Summary: This paper presents a method for creating a bifocal flat lens with different imaging characteristics of its two foci, and demonstrates the advantages of this lens in capturing high-resolution magnified images and wide field of view images.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Jun-Hua Li, Han-Le Zhang, Qing-Lin Ji, Wu-Xiang Zhao
Summary: This paper proposes a distortion-corrected integral imaging 3D display system based on lens array holographic optical elements. By using distortion compensation and perspective transformations, the system achieves a better 3D display effect.
Article
Optics
Xiaomin Song, Hongxia Zhang, Ziling Zhang, Ruoxin Zhao, Dagong Jia, Tiegen Liu
Summary: This study introduces a varifocal liquid lens formed by electrowetting and dielectrophoretic effects, proposing a Maxwell force-driven liquid lens with a large aperture and low threshold voltage. By utilizing the polarization effect to generate Maxwell force, the threshold voltage decreases sharply with an increase in liquid volume, potentially expanding the aperture of the liquid lens to the centimeter level. The lens transitions from concave to convex as Maxwell force increases, showing promise for applications in light-sheet microscopes and virtual reality systems.
Article
Chemistry, Analytical
Md. Shahinur Alam, Ki-Chul Kwon, Munkh-Uchral Erdenebat, Mohammed Y. Abbass, Md. Ashraful Alam, Nam Kim
Summary: A super-resolution algorithm based on generative adversarial network (GAN) is proposed to enhance the resolution of integral imaging microscopy system, achieving better results than existing algorithms. By using consecutive residual blocks and content loss, it successfully generates high-resolution directional view images.
Article
Optics
Jing Han, Qinfeng Xu, Jiannong Chen, Linwei Zhu
Summary: This letter investigates a nonlinear far-field super-resolution technique that exceeds the linear diffraction limitation, utilizing the orientationally enhanced photorefractive effect of polymer to establish an inherently phase-matched diffraction grating. An improvement of about four times in resolution is obtained and further enhancement is anticipated. This work may offer a potential strategy for various subwavelength-resolved imaging applications.
Article
Optics
Xiao-Li Ma, Han-Le Zhang, Rong-Ying Yuan, Tong-Yu Wang, Min-Yang He, Yan Xing, Qiong-Hua Wang
Summary: This article introduces an integral imaging (II) display system that simultaneously enhances depth of field (DOF) and resolution. The system utilizes a transmissive mirror device (TMD) and a semi-transparent mirror (STM) to reconstruct two central depth planes, effectively enhancing DOF. Additionally, the resolution in the overlapping DOF region is increased through interpolation of light field information from two II display units. The article analyzes the impact of the distance between the II display units and the TMD on 3D image quality and proposes optimization strategies in geometric and wave optics to eliminate ghost images and 3D pixel gaps.
Article
Optics
Siddharatha Thakur, Philippe Tamarat, Antonine Rochet, Joschka Birk, Ivan S. Veshchunov, Malo Bezard, Alexander I. Buzdin, Jean-Baptiste Trebbia, Brahim Lounis
Summary: Magneto-optical imaging of quantized magnetic flux tubes in superconductors, known as Abrikosov vortices, is achieved by measuring Faraday rotation of polarized light using a magneto-optical indicator placed on top of the superconductor. However, the spatial resolution of these vortices is usually limited due to aberrations induced by the thick indicator substrate. In this study, we demonstrate wide field optical imaging of single flux quanta in a Niobium film with a resolution better than 600 nm and sub-second acquisition periods by using a high refractive index solid immersion lens. Vectorial field simulations are also used to optimize the experimental features of vortex images.
Article
Chemistry, Multidisciplinary
Hyeonah Jeong, Eunsu Lee, Hoon Yoo
Summary: This paper presents a new method for extracting an elemental image array in three-dimensional (3D) integral imaging, and proposes a postprocessing method to improve the accuracy. Experimental results demonstrate that the proposed postprocessing techniques enhance the existing method.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Shuqi Chen, Jue LI, Yangyang Zhou, Zhanlei Hao, Qilin Duan, Huangyang Chen
Summary: This study explores a new method for super-resolution imaging inspired by the mechanism of surface plasmon polaritons (SPPs), using Maxwell's fish-eye lens (MFEL) coated with a cylindrical layer of negative permeability. The amplification of evanescent waves in the negative permeability layer facilitates the transmittance of high spatial frequency information to achieve super-resolution imaging.
Article
Multidisciplinary Sciences
Chenxi Qian, Kun Miao, Li-En Lin, Xinhong Chen, Jiajun Du, Lu Wei
Summary: VISTA is a label-free superresolution method combining sample expansion and vibrational imaging, enabling high-resolution interrogation of protein-rich biological structures in cells and tissues, with a resolution down to 78 nm.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Bo Xiong, Tianyi Zhu, Yuhan Xiang, Xiaopeng Li, Jinqiang Yu, Zheng Jiang, Yihan Niu, Dong Jiang, Xu Zhang, Lu Fang, Jiamin Wu, Qionghai Dai
Summary: MiSLFM utilizes a tilted mirror to achieve super-resolved axial resolution with a single objective, expanding the depth of field of LFM. It allows observation of various organelle interactions and intercellular interactions, as well as more robust blood cell tracking in zebrafish larvae under low light conditions.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
Dae-Youl Park, Jae-Hyeung Park
Article
Optics
Mehdi Askari, Jae-Hyeung Park
Article
Optics
Dae-Youl Park, Jae-Hyeung Park
Summary: A novel method for scaling holograms for three-dimensional image reconstructions is proposed, ensuring constant transverse and axial magnifications. The method utilizes the linear nature of light field data to achieve distortion-free scaling of reconstructions. The proposed method is verified through optical experiments.
Article
Optics
Dabin Min, Myeong-Ho Choi, Jae-Hyeung Park
Summary: The proposed compact floating display system utilizes a dihedral corner reflector array and decentered lenses to achieve a in-line configuration for floating images. The decentered lenses tilt the incident angle for the reflector array while separating ghost images from desired floating images through refraction. These techniques have been validated through optical experiments.
Article
Optics
Kwang-Soo Shin, Myeong-Ho Choi, Junyoung Jang, Jae-Hyeung Park
Summary: This paper introduces a waveguide-type near-eye display with two image planes using a polarization grating, reducing eye fatigue by enabling dual image plane formation.
Article
Optics
Myeong-Ho Choi, Kwang-Soo Shin, Junyoung Jang, Woongseob Han, Jae-Hyeung Park
Summary: This paper proposes a novel waveguide-type optical see-through Maxwellian near-eye display for augmented reality. It utilizes a pin-mirror holographic optical element (HOE) array to achieve Maxwellian view and eye-box replication. Each pin-mirror HOE presents virtual images with deep depth of field, reducing the discrepancy between vergence and accommodation distance. The compact form factor is achieved through thin waveguide and HOE couplers.
Article
Optics
Yeon-Gyeong Ju, Hyon-Gon Choo, Jae-Hyeung Park
Summary: This paper investigates a learning-based complex field recovery technique for reconstructing an object from its digital hologram. Unlike previous approaches, this technique directly extracts the object complex field in the hologram plane, making it suitable for three-dimensional objects with depth variations. The proposed technique is applied to general objects with large amplitude variations, unlike previous methods that focused on transparent biological samples with nearly uniform amplitudes. The feasibility of the proposed technique is demonstrated through numerical simulations and optical experiments.
Article
Optics
Sotero Ordones, Jae-Hyeung Park, Henry Quach, Daewook Kim, Heejoo Choi
Summary: In this paper, we propose a phase demodulation method to distinguish the ghost reflection commonly observed in optical testing. The method digitally processes a sequence of fringe patterns to separate the reflections from the front and rear surfaces. Experimental results demonstrate the effectiveness of the proposed method.
Article
Optics
Dabin Min, Kyosik Min, Hee-Jin Choi, Hanul Lee, Jae-Hyeung Park
Summary: A novel technique is proposed to process the occlusion of a background hologram when synthesizing a front scene hologram from its light field. The technique directly processes the occlusion between different domains, providing computational efficiency and accuracy.
Biographical-Item
Optics
YongKeun Park, Jae-Hyeung Park, Hwi Kim, Hong-Seok Lee, Yoshio Hayasaki, Ting-Chung Poon
Article
Optics
Woongseob Han, Jiyun han, Junyoung Jang, Yeon-gyeong Ju, Jae-hyeung Park
Summary: We propose a new lightguide-type super multi-view near-eye display that combines a digital micromirror device and a LED array. This method uses a compact combiner optics, consisting of a thin lightguide and holographic optical elements (HOEs), to present three-dimensional images with a natural monocular depth cue. Optical experiments verify the feasibility of this method, demonstrating monocular three-dimensional image presentation over a wide depth range. The study also analyzes the degradation of image quality caused by the spectral spread of the HOEs and shows its reduction through pre-compensation using an adaptive moment estimation (Adam) optimizer.
Article
Optics
Kyosik Min, Dabin Min, Jae-Hyeung Park
Summary: WignerLFH is a method that utilizes Wigner inverse transform to synthesize the complex optical field of three-dimensional objects without the need for a depth map. It offers higher resolution compared to traditional hogel-based methods and allows for complete control over the carrier wave. However, the method's requirement for an orthographic projection geometry limits its application to real scene and restricts the depth range. In this paper, we propose a new technique that uses perspective projection geometry to overcome these limitations and enable the synthesis of holograms for large three-dimensional objects at far distances. Numerical simulations and optical experiments validate the feasibility of our proposed technique.
OPTICS COMMUNICATIONS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Chuan Luo, Brandon Hellman, Guanghao Chen, Joshua Rodriguez, Charles Perkins, Jae-Hyeung Park, Yuzuru Takashima
Summary: The holographic lidar concept utilizes a hybrid light modulation technique based on DMD technology, achieving coarse-steering through sawtooth phase modulation and fine-steering through binary amplitude modulation. The system demonstrates a 2D beam steering scheme and is successfully implemented into a lidar system with high performance specifications.
EMERGING DIGITAL MICROMIRROR DEVICE BASED SYSTEMS AND APPLICATIONS XIII
(2021)
Proceedings Paper
Computer Science, Hardware & Architecture
Brandon Hellman, Ted Lee, Jae-Hyeung Park, Yuzuru Takashima
Summary: This technology increases the independent output display pixels of a DMD by three orders of magnitude using in-plane angular-spatial light modulation technique, achieving gigapixel output in a multi-perspective display. High-resolution perspectives are demonstrated across a wide field of view, and multi-focal-plane image generation for 30 FPS multi-perspective videos is realized.
OPTICAL ARCHITECTURES FOR DISPLAYS AND SENSING IN AUGMENTED, VIRTUAL, AND MIXED REALITY (AR, VR, MR) II
(2021)
Article
Optics
Dabin Min, Kyosik Min, Jae-Hyeung Park
Summary: The proposed method synthesizes a color non-hogel-based computer-generated hologram (CGH) from light field data of a three-dimensional scene, avoiding color aberrations in hologram reconstructions by setting a common hologram pixel pitch and spatial frequency sampling grid for all color channels. This ensures the quality of the synthesized color hologram by interpreting the relationship between ray angle and spatial frequency, addressing color aberrations in hologram reconstructions.
CURRENT OPTICS AND PHOTONICS
(2021)
