16 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.
Martina Vacalebre, Renato Frison, Carmelo Corsaro, Fortunato Neri + 4 more
'Sabrina Conoci' 'Elena Anastasi' 'Maria Cristina Curatolo' 'Enza Fazio'] Adaptive optics (AO) is employed for the continuous measurement and correction of ocular aberrations. Human eye refractive errors (lower-order aberrations such as myopia and astigmatism) are corrected with contact lenses and excimer laser…
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…
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…
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…
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…
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…
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…
Yuxuan Ren, Weizhou Luo, Yang Chen, Le Zhao + 6 more
Highlights What are the main findings?1. A novel non-null interferometric measurement method for cylindrical surfaces with complex parameters is presented. 2. Misalignment aberrations can be reconstructed using only the partial derivative in one direction. What are the implications of the main findings?1. Various…
Yunhui Gao, Liangcai Cao, Din Ping Tsai
Optical waves carry rich information in their spatial profiles and topological structures. Characterization of optical wavefronts is a key prerequisite in broad applications across fundamental research and industrial technologies. However, existing wavefront sensing techniques typically compromise between…
Chunxu Ding, Rongjun Shao, Qiaozhi He, Lei S. Li + 1 more
Significance Wavefront shaping (WFS) can compensate for distortions by optimizing the wavefront of the input light or reversing the transmission matrix of the media. It is a promising field of research. A thorough understanding of principles and developments of WFS is important for optical research. Aim To provide…
Lorant A. Muth
This study was conducted to verify that the probe-position error correction can be successfully applied to real data obtained on a planar near-field range where probe position errors are known. Since probe position-error correction is most important at high frequencies, measurements were made at 60 GHz. Six planar…
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.…
Nuo Liu, Aiping Zhai, Tingting Zheng, Wenjing Zhao + 1 more
Wavefront single-pixel imaging (WSPI) has emerged as a promising approach for simultaneous amplitude and phase reconstruction, especially in spectral wavebands where cameras are immature or even unavailable. However, conventional WSPIs suffer from limited imaging speed & range, and heavy pattern-data storage. Here, we…
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…