Results 101 to 110 of about 96,711 (321)
Wavefront measurement method based on improved light field camera
Results in Physics, 2020 The light field camera is used in the wavefront sensing field because of its simple structure, large field of view, high utilization rate of light energy, etc.
Xin Chen +7 more
doaj
Integrated modeling of wavefront sensing and control for space telescopes utilizing active and adaptive optics [PDF]
arXiv, 2023 Extreme wavefront correction is required for coronagraphs on future space telescopes to reach 1e-8 or better starlight suppression for the direct imaging and characterization of exoplanets in reflected light. Thus, a suite of wavefront sensors working in tandem with active and adaptive optics are used to achieve stable, nanometer-level wavefront ...
arxiv
Focal Plane Wavefront Sensing using Residual Adaptive Optics Speckles [PDF]
, 2013 Optical imperfections, misalignments, aberrations, and even dust can significantly limit sensitivity in high-contrast imaging systems such as coronagraphs.
Codona, Johanan L., Kenworthy, Matthew
core +3 more sources
Wavefront-sensing-based autofocusing in microscopy [PDF]
Journal of Biomedical Optics, 2017 Massive image acquisition is required along the optical axis in the classical image-analysis-based autofocus method, which significantly decreases autofocus efficiency. A wavefront-sensing-based autofocus technique is proposed to increase the speed of autofocusing and obtain high localization accuracy.
Xiaolin Tian +10 more
openaire +2 more sources
Achromatic 3D Multi‐Color Orbital Angular Momentum Holography
Advanced Science, EarlyView.This work presents an achromatic 3D multicolor orbital angular momentum (OAM) holography based on spatial multiplexing. By integrating wavelength‐specific lens functions onto monochromatic Fourier OAM‐dependent holograms and high‐resolution spatial discretization and interleaving via two‐photon lithography (TPL), the approach addresses axial chromatic ...
Hang Su +5 more
wiley +1 more source
An Optical Wavefront Sensor Based on a Double Layer Microlens Array
Sensors, 2011 In order to determine light aberrations, Shack-Hartmann optical wavefront sensors make use of microlens arrays (MLA) to divide the incident light into small parts and focus them onto image planes.
Hsiang-Chun Wei +3 more
doaj +1 more source
Wavefront sensing based on the inverted Hartmann sensor [PDF]
arXiv, 2019 The classic Hartmann test consists of an array of holes to reconstruct the wavefront from the local deviation of each focal spot, and Shack-Hartmann sensor improved that with an array of microlenses. This array of microlenses imposes practical limitations when the wavefront is not into of visible wavelengths, e.g., the fabrication of these. Instead, we
arxiv
Advanced Science, EarlyView.The expansive design space of advanced metasurfaces, particularly those with multiple degrees of freedom (MDOF), renders traditional design methods less effective. A physics‐driven intelligent design is proposed for MDOF metasurfaces, which integrates physical knowledge into neural networks, enhancing interpretability and computational efficiency. This
Jian Lin Su +10 more
wiley +1 more source
Higher-resolution wavefront sensing based on sub-wavefront information extraction
Frontiers in PhysicsThe limited spatial sampling rates of conventional Shack–Hartmann wavefront sensors (SHWFSs) make them unable to sense higher-order wavefront distortion.
Hongli Guan +25 more
doaj +1 more source
A two-step approach to wavefront sensing for the Large Deployable Reflector (LDR) was examined as part of an effort to define wavefront-sensing requirements and to determine particular areas for more detailed study.
Tubbs, Eldred F.
core +1 more source