19 papers · ranked by Valyu relevance
Hossein Khosroabadi, David Laundy, Vishal Dhamgaye, Kawal Sawhney + 1 more
'M. Zangrando'] A quick way of wavefront error analysis of a focusing optics using SHADOW is presented, that is required for fourth-generation light sources. The method is developed to optimize the focal spot and intensity of a non-ideal optics by designing a customized phase corrector.
Matthew Ching Ho Leung, Colby Jurgenson, Andrew Szentgyorgyi, B. A. McLeod + 9 more
'B. A. McLeod' 'Cem Onyuksel' 'Joseph Zajac' 'David Charbonneau' 'William Podgorski' 'A. Unger' 'Mark Mueller' 'Matthew C Smith' 'Daniel F. Baldwin' 'V. Ashley Villar'] The Hartmann test is a method used to measure the wavefront error in a focal optical system, wherein a mask with a pattern of small holes is placed at…
Yahui Zhu, Ailing Tian, Hongjun Wang, Bingcai Liu + 1 more
To overcome the limitations of phase sampling points in testing aspherical surface wavefronts using traditional interferometers, we propose a high-spatial-resolution method based on multi-directional orthogonal lateral shearing interferometry. In this study, we provide a detailed description of the methodology, which…
Alexandra Georgieva, Andrey V. Belashov, Nikolay V. Petrov
The paper presents the results of a comprehensive study on the optimization of independent amplitude and phase wavefront manipulation which is implemented using a binary digital micromirror device. The study aims to investigate the spatial resolution and quantization achievable using this approach and its optimization…
Courtney Johnson, Min Guo, Magdalena C. Schneider, Yijun Su + 5 more
Fluorescence microscopy is an invaluable tool in biology, yet its performance is compromised when the wavefront of light is distorted due to optical imperfections or the refractile nature of the sample. Such optical aberrations can dramatically lower the information content of images by degrading image contrast…
Yongjie Wang, Conghui Zhu, Wenxi Zhang, Xuewen Shu + 2 more
Point diffraction interferometers (PDIs) utilize a near-ideal spherical wavefront generated by point diffraction as the reference, providing a high-quality measurement benchmark independent of reference surface quality. In this work, a compact dual-oblique-fiber heterodyne phase-shifting point diffraction…
Satoshi Tomioka, Naoki Miyamoto, Y. Yamauchi, Yutaka Matsumoto + 1 more
Wavefront reconstruction in lateral shearing interferometry typically assumes that the shear amount is an integer multiple of the sampling interval. When the shear is fractional, approximating it with the nearest integer value leads to noticeable reconstruction errors. To address this, we propose a weighted integer…
Francesco Fersini, Alessandro Zunino, Pietro Morerio, Francesca Baldini + 3 more
Laser scanning microscopy (LSM) is the base of numerous advanced imaging techniques, including confocal laser scanning microscopy (CLSM), a widely used tool in life sciences research. However, its effective resolution is often compromised by optical aberrations, a common challenge in all optical systems. While adaptive…
Rundong Fan, Shili Wei, Huiru Ji, Zhuang Qian + 3 more
frequency bands for prescribed wavefront errors Authors: ['Rundong Fan' 'Shili Wei' 'Huiru Ji' 'Zhuang Qian' 'Hao Tan' 'Yan Mo' 'Donglin Ma'] Abstract: The surface errors of freeform surfaces reflect the manufacturing complexities and significantly impact the feasibility of processing designed optical systems. With…
Alison Wong, Barnaby Norris, Vincent Déo, Peter Tuthill + 6 more
'David Sweeney' 'Kyohoon Ahn' 'Julien Lozi' 'Sébastien Vievard' 'Olivier Guyon'] The pyramid wavefront sensor (PyWFS) has become increasingly popular to use in adaptive optics (AO) systems due to its high sensitivity. The main drawback of the PyWFS is that it is inherently nonlinear, which means that classic linear…
Wenhao Li, Xinyu Wang, Bayanheshig, Zhaowu Liu + 8 more
'Shan Jiang' 'Yubo Li' 'Shuo Li' 'Wei Zhang' 'Yanxiu Jiang' 'Zheng Wu' 'Wenyuan Zhou'] The scanning interference field exposure technique is an effective method to fabricate holographic diffraction grating with meter-level size and nano-level precision. The main problems of fabricating large-aperture and high-precision…
Xiangzhang Cheng, Bo Wang, Li Luo, Zhaowei Sun + 1 more
Tissue-induced optical aberrations fundamentally constrain intravital microscopy in deep or complex biological specimens. While adaptive optics (AO) can compensate for these aberrations, conventional AO methods are limited by either guide-star dependency or slow correction speeds. Here, we develop MeNet-AO, a…
Simon Hubmer, Victoria Hutterer, Ronny Ramlau, Ekaterina Sherina + 1 more
'Bernadett Stadler'] In this paper, we derive a new class of methods for the classic 2D phase unwrapping problem of recovering a phase function from its wrapped form. For this, we consider the wrapped phase as a wavefront aberration in an optical system, and use reconstruction methods for (digital) wavefront sensors…
M. L. McAllister, S. Draycott, R. Calvert, T. Davey + 2 more
'T. S. van den Bremer'] Although a ubiquitous natural phenomenon, the onset and subsequent process of surface wave breaking are not fully understood. Breaking affects how steep waves become and drives air-sea exchanges1. Most seminal and state-of-the-art research on breaking is underpinned by the assumption of…
Sunny Howard, N. Weisse, J. Schroeder, Carola Barbero + 4 more
Dictionary Authors: ['Sunny Howard' 'N. Weisse' 'J. Schroeder' 'Carola Barbero' 'Bruno Alonso' 'I. Sola' 'P. A. Norreys' 'A. Döpp'] Wavefront reconstruction is a critical component in various optical systems, including adaptive optics, interferometry, and phase contrast imaging. Traditional reconstruction methods often…
Alireza Chamanzar, Jonathan Elmer, Lori Shutter, Jed Hartings + 1 more
Noninvasive detection of spreading depolarizations (SD), as a potentially treatable mechanism of worsening brain injuries after traumatic brain injuries (TBI), has remained elusive. Current methods to detect SDs are based on intracranial recording, an invasive method with limited spatial coverage. Less invasive methods…
Iksung Kang, Hyeonggeon Kim, Ryan Natan, Qinrong Zhang + 2 more
Adaptive optics (AO) techniques are designed to restore ideal imaging performance by measuring and correcting aberrations originating from both the microscope system and the sample itself. Conventional AO methods require additional hardware, such as wavefront sensors and corrective devices, for aberration measurement…
Mengyuan Zhao, Yazheng Tao, Kevin Weber, Tim Kaune + 4 more
'Zhenxiang Hao' 'Gudrun Wanner' 'Susana Silva'] In the context of simulating precision laser interferometers, we use several examples to compare two wavefront decomposition methods-the Mode Expansion Method (MEM) and the Gaussian Beam Decomposition (GBD) method-for their precision and applicability. To assess the…
Satoshi Tomioka, Naoki Miyamoto, Y. Yamauchi, Yutaka Matsumoto + 1 more
'Samia Heshmat'] Although a lateral-shear interferometer is robust against optical component vibrations, its interferogram provides information about differential wavefronts rather than the wavefronts themselves, resulting in the loss of specific frequency components. Previous studies have addressed this limitation by…