Results 61 to 70 of about 2,674,389 (338)
Optics Express, 2022 The correction of wavefront sensorless adaptive optics (WFSless AO) can be significantly accelerated by using a holographic modal wavefront sensor (HMWFS). The HMWFS is realized by a computer-generated hologram (CGH) into which all aberration modes to be
M. Liu, Bing Dong
semanticscholar +1 more source
James Webb Space Telescope Optical Simulation Testbed I: Overview and First Results [PDF]
, 2014 The James Webb Space Telescope (JWST) Optical Simulation Testbed (JOST) is a tabletop workbench to study aspects of wavefront sensing and control for a segmented space telescope, including both commissioning and maintenance activities.
Anderson, Rachel +15 more
core +1 more source
Calibrating a high-resolution wavefront corrector with a static focal-plane camera
, 2013 We present a method to calibrate a high-resolution wavefront-correcting device with a single, static camera, located in the focal plane; no moving of any component is needed.
Codona, Johanan +5 more
core +4 more sources
The coronagraphic Modal Wavefront Sensor: a hybrid focal-plane sensor for the high-contrast imaging of circumstellar environments [PDF]
, 2016 The raw coronagraphic performance of current high-contrast imaging instruments is limited by the presence of a quasi-static speckle (QSS) background, resulting from instrumental non-common path errors (NCPEs).
Keller, Christoph U. +4 more
core +3 more sources
Wavefront curvature sensing for the human eye [PDF]
, 2008 In this paper we present a curvature wavefront sensor for the eye. The layout proposed is novel, whilst the algorithm used has been adapted from previously published work [Roddier, F.; Roddier, C. Appl. Opt. 1991, 30, 1325–1327]. The design of the set-up
Cristiano Torti +5 more
core +1 more source
Extended scene deep learning wavefront sensing.
Journal of The Optical Society of America A-optics Image Science and Vision, 2022 We have applied a combination of blind deconvolution and deep learning to the processing of Shack-Hartmann images. By using the intensity information contained in spot positions, and the fine structure of the separate images created by the lenslets, we ...
Bas de Bruijne, G. Vdovin, O. Soloviev
semanticscholar +1 more source
Digging Deeper through Biological Specimens Using Adaptive Optics-Based Optical Microscopy
Photonics, 2023 Optical microscopy is a vital tool for visualizing the cellular and sub-cellular structures of biological specimens. However, due to its limited penetration depth, its biological applicability has been hindered.
Gagan Raju, Nirmal Mazumder
doaj +1 more source
Wavefront sensing using diffractive elements [PDF]
Optics Letters, 2012 In this Letter, we introduce a wavefront slope sensor based on a diffractive element. The diffractive element wavefront sensor (DEWS) produces four double overlapping copies of the incoming wavefront acting like a combination of shearing and pyramidal sensors. The DEWS allows a simple and fast slope estimate.
Pérez Cagigal, Manuel +1 more
openaire +3 more sources
Fast & Furious focal-plane wavefront sensing [PDF]
Applied Optics, 2014 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 focal-plane camera.
Korkiakoski, V.A. (author) +5 more
openaire +6 more sources
Single-shot wavefront sensing with deep neural networks for free-space optical communications.
Optics Express, 2021 Applying deep neural networks in image-based wavefront sensing allows for the non-iterative regression of the aberrated phase in real time. In view of the nonlinear mapping from phase to intensity, it is common to utilize two focal plane images in the ...
Minghao Wang, Wen Guo, Xiuhua Yuan
semanticscholar +1 more source