Zonal wavefront reconstruction of Shack–Hartmann and Hartmann patterns with hexagonal cells
Sign Up to like & getrecommendations! Published in 2018 at "Optics Communications"
DOI: 10.1016/j.optcom.2018.06.027
Abstract: Abstract In this article we will develop a method to integrate Shack–Hartmann and Hartmann pattern with hexagonal cells, using a polynomial representation (modal integration) over each hexagonal cell. Since each hexagonal has six sampling points,… read more here.
Keywords: hartmann hartmann; hexagonal cells; hartmann; shack hartmann ... See more keywords
Design and characterization of a safe Shack–Hartmann type aberrometer for making in-vivo measurements: Heuristic approximation
Sign Up to like & getrecommendations! Published in 2020 at "Optics Communications"
DOI: 10.1016/j.optcom.2019.124500
Abstract: Abstract The Shack–Hartmann technique is one of the most commonly used methods for measuring the optical aberrations of human eyes i n − v i v o . However, hazardous exposure could occur when the… read more here.
Keywords: aberrometer; system; shack; hartmann type ... See more keywords
Multi-focal Shack–Hartmann wavefront sensing with self-interference Chinese Taiji-lenslet array
Sign Up to like & getrecommendations! Published in 2021 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2021.106645
Abstract: Abstract Shack–Hartmann wavefront sensor (SHWS) is a traditional method of obtaining the phase information of the incident light. As a classical method, SHWS has the merit of simple structure, good usability, real-time monitoring and wide… read more here.
Keywords: lenslet array; self interference; taiji lenslet; shack hartmann ... 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
High-resolution wavefront reconstruction using multiframe Shack–Hartmann wavefront sensor measurements
Sign Up to like & getrecommendations! Published in 2020 at "Optical Engineering"
DOI: 10.1117/1.oe.59.11.113102
Abstract: Abstract. High-resolution imaging with large ground-based telescopes is limited by atmospheric turbulence. The observed images are usually blurred with unknown point spread functions (PSFs) defined in terms of the wavefront distortions of light. To effectively… read more here.
Keywords: wavefront; shack hartmann; high resolution;
Near ground horizontal high resolution Cn2 profiling from Shack-Hartmann slopeand scintillation data.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.438170
Abstract: Coupled slope and scintillation detection and ranging (CO-SLIDAR) is a very promising technique for the metrology of near ground Cn2 profiles. It exploits both phase and scintillation measurements obtained with a dedicated wavefront sensor and… read more here.
Keywords: scintillation; cn2; shack hartmann; metrology ... See more keywords
Wavefront sensing for a Shack–Hartmann sensor using phase retrieval based on a sequence of intensity patterns
Sign Up to like & getrecommendations! Published in 2017 at "Applied Optics"
DOI: 10.1364/ao.56.001358
Abstract: An iterative phase retrieval method is applied to a sequence of intensity patterns obtained from a Shack–Hartmann sensor to reconstruct an unknown wavefront. The simulation results validate the proposed technique even under noisy conditions. The… read more here.
Keywords: intensity patterns; sequence intensity; phase retrieval; shack hartmann ... 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
Adaptive optics retinal imaging with automatic detection of the pupil and its boundary in real time using Shack-Hartmann images.
Sign Up to like & getrecommendations! Published in 2017 at "Applied optics"
DOI: 10.1364/ao.56.006748
Abstract: Retinal imaging with an adaptive optics (AO) system usually requires that the eye be centered and stable relative to the exit pupil of the system. Aberrations are then typically corrected inside a fixed circular pupil.… read more here.
Keywords: pupil; shack hartmann; retinal imaging; optics ... See more keywords
Wavefront control in adaptive microscopy using Shack-Hartmann sensors with arbitrarily shaped pupils.
Sign Up to like & getrecommendations! Published in 2018 at "Optics express"
DOI: 10.1364/oe.26.001655
Abstract: In adaptive optical microscopy of thick biological tissue, strong scattering and aberrations can change the effective pupil shape by rendering some Shack-Hartmann spots unusable. The change of pupil shape leads to a change of wavefront… read more here.
Keywords: pupil; arbitrarily shaped; microscopy; control ... See more keywords
Shack-Hartmann wavefront sensor optical dynamic range.
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DOI: 10.1364/oe.419311
Abstract: The widely used lenslet-bound definition of the Shack-Hartmann wavefront sensor (SHWS) dynamic range is based on the permanent association between groups of pixels and individual lenslets. Here, we formalize an alternative definition that we term… read more here.
Keywords: hartmann wavefront; dynamic range; lenslet; shack hartmann ... See more keywords