Results 21 to 30 of about 5,982 (227)
A Local Threshold Checkerboard Algorithm for Adaptive Optics System With a Plenoptic Sensor
IEEE Photonics Journal, 2022 Adaptive optics systems will encounter challenges under strong atmospheric turbulence conditions. Recently, a modified approach based on plenoptic sensor has attracted considerable attention.
Zhichong Wang +5 more
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Fast holographic scattering compensation for deep tissue biological imaging
Nature Communications, 2021 Wavefront shaping is used to overcome scattering in biological tissues during imaging, but determining the compensation is slow. Here, the authors use holographic phase stepping interferometry, where new phase information is updated after each ...
Molly A. May +5 more
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An Efficient Method for Wavefront Aberration Correction Based on the RUN Optimizer
Photonics, 2023 The correction of wavefront aberrations in wavefront sensorless (WFS-less) adaptive optical (AO) systems requires control algorithms that can ensure rapid convergence while maintaining effective correction capabilities.
Huizhen Yang +6 more
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Forecasting wavefront corrections in an adaptive optics system
Journal of Astronomical Telescopes, Instruments, and Systems, 2022 We use telemetry data from the Gemini North ALTAIR adaptive optics system to investigate how well the commands for wavefront correction (both Tip/Tilt and high-order turbulence) can be forecasted in order to reduce lag error (due to wavefront sensor averaging and computational delays) and improve delivered image quality.
Hafeez, Rehan +4 more
openaire +2 more sources
Iterative linear focal-plane wavefront correction [PDF]
Journal of the Optical Society of America A, 2013 We propose an efficient approximation to the nonlinear phase diversity (PD) method for wavefront reconstruction and correction from intensity measurements with potential of being used in real-time applications. The new iterative linear phase diversity (ILPD) method assumes that the residual phase aberration is small and makes use of a first-order ...
Smith, C.S. (author) +6 more
openaire +5 more sources
Wavefront‐Guided Scleral Lens Correction in Keratoconus [PDF]
Optometry and Vision Science, 2014 ABSTRACT Purpose To examine the performance of state‐of‐the‐art wavefront‐guided scleral contact lenses (wfgSCLs) on a sample of keratoconic eyes, with emphasis on performance quantified with visual quality metrics, and to provide a detailed discussion of the process used to design, manufacture,
Jason D, Marsack +6 more
openaire +2 more sources
Research on a Decoupling Algorithm for the Dual-Deformable-Mirrors Correction System
Applied Sciences, 2023 Wavefront distortion caused by atmospheric turbulence can be described as different types of aberrations, such as piston, tilt, defocusing, astigmatism, coma and so on.
Jingyuan Liang +3 more
doaj +1 more source
A Review of Wavefront Sensing and Control Based on Data-Driven Methods
AerospaceOptical systems suffer from wavefront aberrations due to complex atmospheric environments and system component errors, leading to systematic aberrations and significantly degrading optical field quality. Therefore, the detection and correction of optical
Ye Zhang +4 more
doaj +1 more source
Experimental Research on the Correction of Vortex Light Wavefront Distortion
PhotonicsWavefront distortion occurs when vortex beams are transmitted in the atmosphere. The turbulence effect greatly affects the transmission of information, so it is necessary to use adaptive optical correction technology to correct the wavefront distortion ...
Yahang Ge, Xizheng Ke
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IEEE Photonics JournalA low frequency wavefront aberration correction method for solar telescopes based on secondary mirror movement is proposed to correct dynamic wavefront aberration during the operation of solar telescope.
Yawei Xiao +4 more
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