Results 1 to 10 of about 93,632 (228)
Compressive Wavefront Sensing with Weak Values [PDF]
Optics Express, 2014 We demonstrate a wavefront sensor based on the compressive sensing, single-pixel camera. Using a high-resolution spatial light modulator (SLM) as a variable waveplate, we weakly couple an optical field's transverse-position and polarization degrees of freedom.
Howland, Gregory A. +2 more
arxiv +9 more sources
Compressed wavefront sensing. [PDF]
Opt Lett, 2014 We report on an algorithm for fast wavefront sensing that incorporates sparse representation for the first time in practice. The partial derivatives of optical wavefronts were sampled sparsely with a Shack-Hartman wavefront sensor (SHWFS) by randomly subsampling the original SHWFS data to as little as 5%.
Polans J, McNabb RP, Izatt JA, Farsiu S.
europepmc +6 more sources
Using the generalised-optical differentiation wavefront sensor for laser guide star wavefront sensing [PDF]
arXiv, 2020 Laser guide stars (LGS) are used in many adaptive optics systems to extend sky coverage. The most common wavefront sensor used in combination with a LGS is a Shack-Hartmann wavefront sensor (SHWFS). The Shack-Hartmann has a major disadvantage for extended source wavefront sensing because it directly samples the image.
Sebastiaan Y. Haffert +2 more
arxiv +8 more sources
Fast High-Resolution Phase Diversity Wavefront Sensing with L-BFGS Algorithm [PDF]
Sensors, 2023 The presence of manufacture error in large mirrors introduces high-order aberrations, which can severely influence the intensity distribution of point spread function.
Haoyuan Zhang +6 more
doaj +2 more sources
Research on Optical Metrology for Complex Optical Surfaces with Focal Plane Wavefront Sensing [PDF]
Micromachines, 2023 Complex optical elements have the advantages of improving image quality and optical performance and expanding the field of view. Therefore, it is widely used in X-ray scientific devices, adaptive optical elements, high-energy laser systems, and other ...
Xinxue Ma +4 more
doaj +2 more sources
Hyperspectral compressive wavefront sensing
High Power Laser Science and Engineering, 2023 Presented is a novel way to combine snapshot compressive imaging and lateral shearing interferometry in order to capture the spatio-spectral phase of an ultrashort laser pulse in a single shot.
Sunny Howard +4 more
doaj +4 more sources
Wavefront-sensing with a thin diffuser [PDF]
Opt. Lett. 42(24) 4117 (2017), 2017 We propose and implement a broadband, compact, and low-cost wavefront sensing scheme by simply placing a thin diffuser in the close vicinity of a camera. The local wavefront gradient is determined from the local translation of the speckle pattern. The translation vector map is computed thanks to a fast diffeomorphic image registration algorithm and ...
Hervé Rigneault +2 more
arxiv +5 more sources
Jitter-Robust Phase Retrieval Wavefront Sensing Algorithms [PDF]
Sensors, 2022 Phase retrieval wavefront sensing methods are now of importance for imaging quality maintenance of space telescopes. However, their accuracy is susceptible to line-of-sight jitter due to the micro-vibration of the platform, which changes the intensity ...
Liang Guo +6 more
doaj +2 more sources
Atmospheric Turbulence Aberration Correction Based on Deep Learning Wavefront Sensing [PDF]
Sensors, 2023 In this paper, research was conducted on Deep Learning Wavefront Sensing (DLWS) neural networks using simulated atmospheric turbulence datasets, and a novel DLWS was proposed based on attention mechanisms and Convolutional Neural Networks (CNNs).
Jiang You +5 more
doaj +2 more sources
Enhanced Neural Architecture for Real-Time Deep Learning Wavefront Sensing [PDF]
SensorsTo achieve real-time deep learning wavefront sensing (DLWFS) of dynamic random wavefront distortions induced by atmospheric turbulence, this study proposes an enhanced wavefront sensing neural network (WFSNet) based on convolutional neural networks (CNN).
Jianyi Li +4 more
doaj +2 more sources