Article
Biochemical Research Methods
Victor Sadanory Takekawa, Leticia Aparecida Marques, Ethan Strubinger, Thiago Pinotti Segato, Stanislau Bogusz, Lais Canniatti Brazaca, Emanuel Carrilho
Summary: Using simpler equipment and lower-cost materials to batch-manufacture metallic electrodes and polymeric microchannels can significantly reduce costs and enhance the performance of sensing platforms. The constructed platforms showed good linearity, stability, and detection limits in testing, demonstrating the effectiveness and feasibility of the new methods.
Article
Physics, Applied
Frank Seiboth, Andreas Schropp, Mikhail Lyubomirskiy, Wenxin Wang, Andreas Jahn, Satishkumar Kulkarni, Thomas F. F. Keller, Christian G. G. Schroer
Summary: Aberration-free x-ray optics are essential for nondestructive scanning x-ray microscopy with high spatial resolution. However, even state-of-the-art x-ray optics often have residual lens aberrations, which can be corrected by integrating additional optical elements into the focusing device. In this study, corrective optical elements were integrated into planar nanofocusing x-ray lenses by structuring a phase plate into the lens chip via focused ion-beam milling. The results showed diffraction-limited performance and a significant reduction in residual intensity outside the focus.
APPLIED PHYSICS LETTERS
(2023)
Article
Geochemistry & Geophysics
Zhiwei Gu, Ru-Shan Wu
Summary: Marchenko equation-based imaging methods are effective in removing internal multiples, especially in layered media with moderately curved interfaces. By rederiving single reflection retrieval using a focusing source method, we avoid the use of redatuming plane and upgoing/downgoing decomposition, providing a new data for complex structures like salt domes. This method expands the application range of Marchenko imaging and internal multiple elimination, with numerical examples validating its effectiveness on the SEG/EAGE salt model in 2-D scenarios.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Optics
Henry Quach, Hyukmo Kang, Byeongjoon Jeong, Heejoo Choi, Daewook Kim
Summary: This paper presents an on-axis deflectometry test configuration for axicon metrology, which can achieve high-resolution surface measurements of axicons by coaxially aligning a camera and surrounding cylindrical illumination source, discussing non-planar illumination architecture, sensitivity, and experimental results of different apex angle axicons.
Article
Engineering, Electrical & Electronic
Yuchong Chen, Shaoyan Gai, Feipeng Da
Summary: In this article, a sine series model (SSM) is proposed to simulate the error, which simplifies the computational work. Based on the SSM, a two-phase correction (TPC) method is proposed to suppress the interference caused by indirect illumination and random noise. Additionally, TPC does not require additional pattern projection by combining the multiwavelength method to unwrap phase. Contrast experiments demonstrate that the proposed TPC method can reduce the error by 40.8%.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Optics
Yi He, Tingwen Xing, Wumei Lin, Zhijie Liao, Weijing Liu
Summary: A method for correcting the illumination uniformity error in lithography optical system is proposed, which includes establishing a mathematical model based on linear invariant system and convolution principle, and designing a uniformity correction device with bidirectional calculation characteristics. The measurement results validate the correctness and effectiveness of the correcting method.
Article
Microscopy
Ryo Ishikawa, Riku Tanaka, Shigeyuki Morishita, Yuji Kohno, Hidetaka Sawada, Takuya Sasaki, Masanari Ichikawa, Masashi Hasegawa, Naoya Shibata, Yuichi Ikuhara
Summary: Recent advancements in aberration correction technology have significantly improved the illumination angle in scanning transmission electron microscopy (STEM), allowing for larger depth resolution. However, minimizing low-order aberrations is crucial for three-dimensional depth sectioning with large illumination angles.
Article
Optics
Junzhou Huo, Haidong Zhang, Zhichao Meng, Fan Yang, Guiyu Yang
Summary: This paper proposes a flexible calibration method for defocused cameras in complex engineering scenes. The method achieves high calibration accuracy by solving the distortion coefficient and establishing an image distance conversion model through linear camera calibration based on image pairs. Experimental results show that the method is effective and has satisfactory calibration accuracy and good anti-noise performance.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Automation & Control Systems
Zaixing He, Peilong Li, Xinyue Zhao, Shuyou Zhang, Jianrong Tan
Summary: The article presents a method to overcome projection defocus on nonideal surfaces, using an efficient defocus compensation algorithm and estimation method for accurate kernel estimation on complex projection surfaces.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2021)
Article
Geochemistry & Geophysics
Samuel T. Thiele, Sandra Lorenz, Moritz Kirsch, Richard Gloaguen
Summary: The widespread use of drones and miniaturized sensors has increased remote sensing applications with high spatial and spectral resolutions. The detailed geometry captured by drones can be utilized to correct illumination effects, enhancing the accuracy of spectral analysis.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Optics
Kai Wen, ZhaoLin Gao, Xiang Fang, Min Liu, JuanJuan Zheng, Ying Ma, Zeev Zalevsky, Peng Gao
Summary: This study introduces a partially coherent illumination-based SIM apparatus for dual-modality microscopic imaging, capable of obtaining phase and fluorescent images of the same sample. The system demonstrates superiority in phase and fluorescent imaging, with potential applications in various fields.
Article
Microscopy
Ryo Ishikawa, Riku Tanaka, Shigeyuki Morishita, Yuji Kohno, Hidetaka Sawada, Takuya Sasaki, Masanari Ichikawa, Masashi Hasegawa, Naoya Shibata, Yuichi Ikuhara
Summary: The advancement in aberration correction technology has significantly improved the depth resolution in scanning transmission electron microscopy by allowing larger illumination angles for three-dimensional analysis. Live aberration correction using atomic-resolution STEM images can save time, enable automation, and benefit axial depth sectioning and phase imaging in STEM.
Article
Optics
Jialong Chen, Songyun Gu, Yunlong Meng, Zhiqiang Fu, Shih-Chi Chen
Summary: The letter introduces a holography-based structured light illumination method to enhance the resolution of widefield temporal focusing microscopy. By inducing temporal focusing and generating structured patterns, this method improves optical cross-sectioning capability and demonstrates enhanced axial confinement and improved suppression of out-of-focus fluorescence in imaging experiments.
Article
Optics
Xiaomin Zheng, Jie Zhou, Lei Wang, Meiting Wang, Wenshuai Wu, Jiajie Chen, Junle Qu, Bruce Zhi Gao, Yonghong Shao
Summary: Structured Illumination Microscopy (SIM) has shown remarkable progress in resolution, imaging depth, and technological advancements in recent years, making it a powerful tool in biomedical research. Its flexibility allows for effective combination with other methods, offering enhanced imaging capabilities.
Article
Geochemistry & Geophysics
Zhenqiang Qin, Xian Li, Yanfeng Gu
Summary: In this article, a physics-based method is proposed to estimate and compensate illumination for the radiometric correction of UAV multispectral images (MSIs). The proposed method builds an illumination estimation model based on intraimage and interimage consistency hypotheses, and utilizes the physical imaging principle to alleviate the influence of varying illumination. Numerical experiments on three UAV datasets demonstrate that the proposed method outperforms current methods and significantly reduces the normalized root mean square error (NRMSE).
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Neurosciences
Diwakar Turaga, Timothy E. Holy
JOURNAL OF NEUROSCIENCE
(2012)
Article
Neurosciences
Gary F. Hammen, Diwakar Turaga, Timothy E. Holy, Julian P. Meeks
NATURE NEUROSCIENCE
(2014)
Article
Neurosciences
Terrence F. Holekamp, Diwakar Turaga, Timothy E. Holy
Article
Biochemical Research Methods
Diwakar Turaga, Timothy E. Holy
BIOMEDICAL OPTICS EXPRESS
(2013)
Article
Cell & Tissue Engineering
Diwakar Turaga, Oriane B. Matthys, Tracy A. Hookway, David A. Joy, Meredith Calvert, Todd C. McDevitt
TISSUE ENGINEERING PART C-METHODS
(2020)
Article
Cell & Tissue Engineering
Ana C. Silva, Oriane B. Matthys, David A. Joy, Mara A. Kauss, Vaishaali Natarajan, Michael H. Lai, Diwaker Turaga, Andrew P. Blair, Michael Alexanian, Benoit G. Bruneau, Todd C. McDevitt
Summary: This study demonstrates the successful generation of a human multilineage iPSC-derived organoid model that recapitulates cooperative cardiac and gut development, showing the importance of endoderm tissue in driving cardiac tissue features. This advancement allows for further examination of multi-tissue interactions during development, physiological maturation, and disease.
Article
Multidisciplinary Sciences
Matthew C. Hill, Zachary A. Kadow, Hali Long, Yuka Morikawa, Thomas J. Martin, Emma J. Birks, Kenneth S. Campbell, Jeanne Nerbonne, Kory Lavine, Lalita Wadhwa, Jun Wang, Diwakar Turaga, Iki Adachi, James F. Martin
Summary: This study used single-nucleus RNA sequencing to investigate the hearts of control individuals and those with CHD. The researchers identified CHD-specific cell states in cardiomyocytes, as well as abnormalities in cardiac fibroblasts and peripheral immune cells. These findings provide a roadmap for future personalized treatments for CHD.
Article
Optics
Diwakar Turaga, Timothy E. Holy