Performance analysis of coherent free space optical communications with sequential pyramid wavefront sensor
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2017.09.030
Abstract: Abstract Based-on the previous study on the theory of the sequential pyramid wavefront sensor (SPWFS), in this paper, the SPWFS is first applied to the coherent free space optical communications (FSOC) with more flexible spatial… read more here.
Keywords: pyramid wavefront; wavefront sensor; coherent free; sequential pyramid ... See more keywords
A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-14507-5
Abstract: Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for… read more here.
Keywords: new low; wavefront sensor; developing countries; refractive error ... See more keywords
High-precision wavefront reconstruction from Shack-Hartmann wavefront sensor data by a deep convolutional neural network
Sign Up to like & getrecommendations! Published in 2021 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/abf708
Abstract: The Shack–Hartmann wavefront sensor (SHWFS) has been widely used for measuring aberrations in adaptive optics systems. However, its traditional wavefront reconstruction method usually has limited precision under field conditions because the weight-of-center calculation is affected… read more here.
Keywords: hartmann wavefront; wavefront sensor; wavefront reconstruction; shack hartmann ... See more keywords
Three-sided pyramid wavefront sensor, part 1: simulations and analysis for astronomical adaptive optics
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Astronomical Telescopes, Instruments, and Systems"
DOI: 10.1117/1.jatis.7.4.049001
Abstract: Abstract. The Giant Segmented Mirror Telescopes (GSMTs) including the Giant Magellan Telescope (GMT), the Thirty Meter Telescope (TMT), and the European Extremely Large Telescope (E-ELT), all have extreme adaptive optics (ExAO) instruments planned that will… read more here.
Keywords: wavefront sensor; adaptive optics; performance; wavefront ... See more keywords
Multiscale optimization of the geometric wavefront sensor.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.423536
Abstract: Since wavefront distortions cannot be directly measured from an image, a wavefront sensor (WFS) can use intensity variations from a point source to estimate slope or curvature of a wavefront. However, processing of measured aberration… read more here.
Keywords: wavefront sensor; geometric wfs; multiscale optimization; sensor ... See more keywords
Optimization of the holographic wavefront sensor for open-loop adaptive optics under realistic turbulence. Part I: simulations.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.425397
Abstract: The modal holographic wavefront sensor enables fast measurement of individual aberration modes without the need for time-consuming calculations. However, the measurement accuracy suffers greatly from intermodal crosstalk, caused when the wavefront contains more aberrations than… read more here.
Keywords: wavefront sensor; holographic wavefront; open loop; loop adaptive ... See more keywords
Adaptive optics system for a short wavelength mid-IR laser based on a Shack-Hartmann wavefront sensor and analysis of thermal noise impacts.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.464676
Abstract: We present an adaptive optics (AO) system for a 1.94-µm laser source. Our system consists of a home-made Shack-Hartmann wavefront sensor and silver-coated bimorph deformable mirror operating in a closed-loop control scheme. The wavefront sensor… read more here.
Keywords: system; wavefront sensor; adaptive optics; optics ... See more keywords
Precise calibration of pupil images in pyramid wavefront sensor.
Sign Up to like & getrecommendations! Published in 2017 at "Applied optics"
DOI: 10.1364/ao.56.003281
Abstract: The pyramid wavefront sensor (PWFS) is a novel wavefront sensor with several inspiring advantages compared with Shack-Hartmann wavefront sensors. The PWFS uses four pupil images to calculate the local tilt of the incoming wavefront. Pupil… read more here.
Keywords: pupil; pyramid wavefront; wavefront sensor; pupil images ... See more keywords
Centroid estimation for a Shack-Hartmann wavefront sensor based on stream processing.
Sign Up to like & getrecommendations! Published in 2017 at "Applied optics"
DOI: 10.1364/ao.56.006466
Abstract: Using center of gravity to estimate the centroid of the spot in a Shack-Hartmann wavefront sensor, the measurement corrupts with photon and detector noise. Parameters, like window size, often require careful optimization to balance the… read more here.
Keywords: hartmann wavefront; stream; stream processing; wavefront sensor ... See more keywords
Improvements on speed, stability and field of view in adaptive optics OCT for anterior retinal imaging using a pyramid wavefront sensor
Sign Up to like & getrecommendations! Published in 2024 at "Biomedical Optics Express"
DOI: 10.1364/boe.533451
Abstract: We present improvements on the adaptive optics (AO) correction method using a pyramid wavefront sensor (P-WFS) and introduce a novel approach for closed-loop focus shifting in retinal imaging. The method’s efficacy is validated through in… read more here.
Keywords: optics; retinal imaging; using pyramid; adaptive optics ... See more keywords
Shack-Hartmann wavefront sensor based on a two-dimensional mixed aperture diffractive lens array.
Sign Up to like & getrecommendations! Published in 2024 at "Optics express"
DOI: 10.1364/oe.530050
Abstract: The Shack-Hartmann wavefront sensor (SH-WS) is primarily used to detect the beam wavefront shape, which can be used to detect various perturbations in the atmospheric transmission of high-energy lasers. In this paper, we propose the… read more here.
Keywords: wavefront; wavefront sensor; shack hartmann; mixed aperture ... See more keywords