21 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.
G. Mana, Enrico Massa, Carlo Paolo Sasso
The paper deals with the impact of wavefront errors, due to the optical aberrations of a two-beam interferometer, on the period of the travelling fringe observed by integrating the interference pattern. A Monte Carlo simulation of the interferometer operation showed that the fringe-period estimate is unbiased if…
Joost van den Born, Willem Jellema, Ramón Navarro, Eline Tolstoy + 2 more
'Bayu Jayawardhana' 'A. Janssen'] We present our investigation into the impact of wavefront errors on high accuracy astrometry using Fourier Optics. MICADO, the upcoming near-IR imaging instrument for the Extremely Large Telescope, will offer capabilities for relative astrometry with an accuracy of 50 micro arcseconds…
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…
Visa Korkiakoski, Christoph U. Keller, Niek Doelman, Matthew A. Kenworthy + 2 more
'Matthew A. Kenworthy' 'G. P. P. L. Otten' 'Michel Verhaegen'] We present two complementary algorithms suitable for using focal-plane measurements to control a wavefront corrector with an extremely high spatial resolution. The algorithms use linear approximations to iteratively minimize the aberrations seen by the…
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…
Yangjie Xu, Dong He, Qiang Wang, Hongyang Guo + 3 more
'Zongliang Xie' 'Yongmei Huang'] In this paper, an improved method of measuring wavefront aberration based on image with machine learning is proposed. This method had better real-time performance and higher estimation accuracy in free space optical communication in cases of strong atmospheric turbulence. We…
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…
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…
Tong Ling, Jiabin Jiang, Rui Zhang, Yongying Yang
Real-time quantitative phase imaging has tremendous potential in investigating live biological specimens in vitro. Here we report on a wideband sensitivity-enhanced interferometric microscopy for quantitative phase imaging in real time by employing two quadriwave lateral shearing interferometers based on randomly…
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…
Hanshin Lee
A new concept of using focus-diverse point spread functions (PSFs) for modal wavefront sensing (WFS) is explored. This is based on relatively straightforward image moment analysis of measured PSFs, which differentiates it from other focal-plane wavefront sensing techniques (FPWFS). The presented geometric analysis…
Hanshin Lee
The shape of a focus-modulated point spread function (PSF) is used as a quick visual assessment tool of aberration modes in the PSF. Further analysis in terms of shape moments can permit quantifying the modal coefficients with an accuracy comparable to that of typical wavefront sensors. In this letter, the error of the…
Xian Yue, Yaliang Yang, Fei Xiao, Hao Dai + 3 more
'Philippe Zeitoun'] Virtual Shack-Hartmann wavefront sensing (vSHWS) can flexibly adjust parameters to meet different requirements without changing the system, and it is a promising means for aberration measurement. However, how to optimize its parameters to achieve the best performance is rarely discussed. In this…
Vasily Matkivsky, Alexander Moiseev, Pavel Shilyagin, Alexander Rodionov + 5 more
A method for numerical estimation and correction of aberrations of the eye in fundus imaging with optical coherence tomography (OCT) is presented. Aberrations are determined statistically by using the estimate based on likelihood function maximization. The method can be considered as an extension of the phase gradient…
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…
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…
Yudong Qiu, Daniel Smith, Chaya Stern, Mudong Feng + 1 more
The parameterization of torsional / dihedral angle potential energy terms is a crucial part of developing molecular mechanics force fields. Quantum mechanical (QM) methods are often used to provide samples of the potential energy surface (PES) for fitting the empirical parameters in these force field terms. To ensure…
Jiasi Wei, Junjie Wu, Chen Wang, Steve Vanlanduit
Digital holography has transformative potential for the measurement of stacked-chip microstructures due to its non-invasive, single-shot, full-field characteristics. However, significant light scattering and diffraction at steep edges in step microstructures cause the batwing effect, leading to measurement errors.…
Vincent Chabot, Maëlle Nodet, Arthur Vidard
Accounting for realistic observation errors is a known bottleneck in data assimilation, because dealing with error correlations is complex. Following a previous study on this subject, we propose to use multiscale modelling, more precisely wavelet transform, to address this question. This study aims to investigate the…
Authors not listed
State of the art in silico ∆∆G predictions for antibody-antigen complexes achieve an accuracy of ±1 kcal/mol. While this is sufficient for high throughput screening or affinity maturation, it is insufficient for assessing the criticality of post-translational modifications (PTMs) during clinical development. PTMs that…