Light: Advanced Manufacturing, 2023 The widely used Shack–Hartmann wavefront sensor (SHWFS) is a wavefront measurement system. Its measurement accuracy is limited by the reference wavefront used for calibration and also by various residual errors of the sensor itself.
Yi He +5 more
doaj +2 more sources
Highly Stable Spatio-Temporal Prediction Network of Wavefront Sensor Slopes in Adaptive Optics [PDF]
Sensors, 2023 Adaptive Optics (AO) technology is an effective means to compensate for wavefront distortion, but its inherent delay error will cause the compensation wavefront on the deformable mirror (DM) to lag behind the changes in the distorted wavefront ...
Ning Wang +6 more
doaj +2 more sources
Sub-Millisecond Phase Retrieval for Phase-Diversity Wavefront Sensor. [PDF]
Sensors (Basel), 2020 We propose a convolutional neural network (CNN) based method, namely phase diversity convolutional neural network (PD-CNN) for the speed acceleration of phase-diversity wavefront sensing.
Wu Y, Guo Y, Bao H, Rao C.
europepmc +2 more sources
Accounting for focal shift in the Shack-Hartmann wavefront sensor. [PDF]
Opt Lett, 2019 The Shack–Hartmann wavefront sensor samples a beam of light using an array of lenslets, each of which creates an image onto a pixelated sensor. These images translate from their nominal position by a distance proportional to the average wavefront slope ...
Akondi V, Dubra A.
europepmc +2 more sources
Modelling of Phase Contrast Imaging with X-ray Wavefront Sensor and Partial Coherence Beams [PDF]
Sensors, 2020 The Hartmann wavefront sensor is able to measure, separately and in absolute, the real δ and imaginary part β of the X-ray refractive index. While combined with tomographic setup, the Hartman sensor opens many interesting opportunities behind the direct ...
Ginevra Begani Provinciali +3 more
doaj +2 more sources
Centroid error due to non-uniform lenslet illumination in the Shack-Hartmann wavefront sensor. [PDF]
Opt Lett, 2019 Images formed by individual Shack-Hartmann wavefront sensor lenslets are displaced proportionally to the average wavefront slope over their aperture. This principle fails when the lenslet illumination is non-uniform.
Akondi V, Steven S, Dubra A.
europepmc +2 more sources
Research on Wavefront Sensing Applications Based on Photonic Lanterns [PDF]
SensorsThe Photonic Lantern (PL) is a novel fiber optic device emerging in wavefront sensing, which converts multimode fiber light fields into single-mode fields.
Zhengkang Zhao +10 more
doaj +2 more sources
Two-photon Shack-Hartmann wavefront sensor. [PDF]
Opt Lett, 2017 We introduce a simple wavefront sensing scheme for aberration measurement of pulsed laser beams in near-infrared wavelengths (
Xia F, Sinefeld D, Li B, Xu C.
europepmc +4 more sources
Large-Dynamic-Range Ocular Aberration Measurement Based on Deep Learning with a Shack-Hartmann Wavefront Sensor. [PDF]
Sensors (Basel)Zhang H +5 more
europepmc +2 more sources
Experimental Verification of Model-Based Wavefront Sensorless Adaptive Optics System for Large Aberrations [PDF]
MicromachinesTo address the limitations of conventional wavefront sensorless adaptive optics (AO) systems regarding iteration efficiency and convergence speed, this study conducts an experimental validation of a model-based wavefront sensorless AO approach.
Huizhen Yang +4 more
doaj +2 more sources