Measurement of freeform optical surfaces: trade‐off between accuracy and dynamic range

S Chen, S Xue, D Zhai, G Tie - Laser & Photonics Reviews, 2020 - Wiley Online Library
Freeform optical surfaces are advantageous to optical designers, as they provide additional
degrees of freedom for optimization. The loss of rotational symmetry, however, makes …

Adaptive optics visual simulators: a review of recent optical designs and applications

S Marcos, P Artal, DA Atchison, K Hampson… - Biomedical optics …, 2022 - opg.optica.org
In their pioneering work demonstrating measurement and full correction of the eye's optical
aberrations, Liang, Williams and Miller,[JOSA A 14, 2884 (1997) 10.1364/JOSAA …

Learning-based Shack-Hartmann wavefront sensor for high-order aberration detection

L Hu, S Hu, W Gong, K Si - Optics express, 2019 - opg.optica.org
We present a learning-based Shack-Hartmann wavefront sensor (SHWS) to achieve the
high-order aberration detection without image segmentation or centroid positioning. Zernike …

Implementing a Hybrid Method for Shack–Hartmann Wavefront Spots Labeling on FPGA

A Abdullah, A Brady, D Heinig, P Krause, M Goy… - Electronics, 2024 - mdpi.com
This paper presents a real-time implementation of a hybrid connected component labeling
method for processing the Shack–Hartmann wavefront sensor's images for an adaptive …

Binocular dynamics of accommodation, convergence, and pupil size in myopes

VP Ghoushchi, J Mompeán, PM Prieto… - Biomedical Optics …, 2021 - opg.optica.org
The purpose of this work is to study the dynamics of the accommodative response as a
function of the subject's refractive error, as a first step in determining whether an anomalous …

[HTML][HTML] Aberration-based quality metrics in holographic lenses

T Lloret, V Navarro-Fuster, MG Ramírez… - Polymers, 2020 - mdpi.com
Aberrations and the image quality of holographic lenses were evaluated by a Hartmann–
Shack (HS) wavefront sensor. Two lenses, one recorded with a symmetrical configuration …

Deep learning-driven wavefront sensing for grating-array based wavefront sensor

N Kumar, P Choudhury, SSG Buddha - IEEE Sensors Journal, 2024 - ieeexplore.ieee.org
This paper introduces a novel methodology for wavefront sensing through the integration of
Convolutional Neural Networks (CNNs) into Grating Array-Based Wavefront Sensors …

Simplifying the detection of optical distortions by machine learning

S Hu, L Hu, B Zhang, W Gong, K Si - Journal of Innovative Optical …, 2020 - World Scientific
Adaptive optics has been widely used in biological science to recover high-resolution optical
image deep into the tissue, where optical distortion detection with high speed and accuracy …

FPGA Implementation of Shack–Hartmann Wavefront Sensing Using Stream-Based Center of Gravity Method for Centroid Estimation

F Kong, M Cegarra Polo, A Lambert - Electronics, 2023 - mdpi.com
We present a fast and reconfigurable architecture for Shack–Hartmann wavefront sensing
implemented on FPGA devices using a stream-based center of gravity to measure the spot …

Fast subpixel displacement measurement, part 1: one-dimensional analysis, simulation, and experiment

M Wan, JJ Healy, JT Sheridan - Optical Engineering, 2022 - spiedigitallibrary.org
Many image processing applications require a quantitative estimation of the underlying
correspondence (of the relative position in space) between two or more images. Here, we …