LAUSR

About LAUSR
Donate
Contact Us

Follow us:

You are not signed in:

Sign Up!


   Articles with "hartmann wavefront" as a keyword



High-precision wavefront reconstruction from Shack-Hartmann wavefront sensor data by a deep convolutional neural network

Sign Up to like & get
recommendations! 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

Centroid estimation for a Shack-Hartmann wavefront sensor based on stream processing.

Sign Up to like & get
recommendations! 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

Shack-Hartmann wavefront sensor optical dynamic range.

Sign Up to like & get
recommendations! Published in 2021 at "Optics express"

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
Photo from wikipedia

COACH-based Shack-Hartmann wavefront sensor with an array of phase coded masks.

Sign Up to like & get
recommendations! Published in 2021 at "Optics express"

DOI: 10.1364/oe.438379

Abstract: Shack-Hartmann wavefront sensors (SHWS) are generally used to measure the wavefront shape of light beams. Measurement accuracy and the sensitivity of these sensors are important factors for better wavefront sensing. In this paper, we demonstrate… read more here.

Keywords: hartmann wavefront; array; wavefront; shack hartmann ... See more keywords

Neural network assisted high flexibility and high resolution Shack-Hartmann wavefront sensing for astronomical observation in darker sky areas.

Sign Up to like & get
recommendations! Published in 2024 at "Optics express"

DOI: 10.1364/oe.527510

Abstract: Shack-Hartmann (SH) wavefront sensing is widely applied to astronomical observations with its fast and accurate measurement. However, due to the computational nature of SH that the input beam is segmented to provide local wavefront slopes,… read more here.

Keywords: shack hartmann; wavefront sensing; hartmann wavefront; resolution ... See more keywords

Improving wavefront reconstruction performance with a binary phase hybrid Shack-Hartmann wavefront sensor.

Sign Up to like & get
recommendations! Published in 2025 at "Optics express"

DOI: 10.1364/oe.552056

Abstract: The Shack-Hartmann wavefront sensor's wavefront reconstruction performance can be improved if more wavefront details over sub-apertures can be acquired. Based on this idea, we design a kind of binary phase hybrid Shack-Hartmann wavefront sensor (BPH-SHWFS)… read more here.

Keywords: shack hartmann; wavefront; sensor; hartmann wavefront ... See more keywords

Optical path difference microscopy with a Shack-Hartmann wavefront sensor.

Sign Up to like & get
recommendations! Published in 2017 at "Optics letters"

DOI: 10.1364/ol.42.002122

Abstract: In this Letter, we show that a Shack-Hartmann wavefront sensor can be used for the quantitative measurement of the specimen optical path difference (OPD) in an ordinary incoherent optical microscope, if the spatial coherence of… read more here.

Keywords: hartmann wavefront; microscopy; wavefront sensor; path difference ... See more keywords

Hartmann wavefront sensor characterization of a high charge vortex beam in the extreme ultraviolet spectral range.

Sign Up to like & get
recommendations! Published in 2018 at "Optics letters"

DOI: 10.1364/ol.43.002780

Abstract: We demonstrate for the first time, to the best of our knowledge, the ability of extreme ultraviolet (XUV) Hartmann wavefront sensors to characterize high charge vortex beams produced by high-order harmonic generation up to the… read more here.

Keywords: high charge; charge vortex; hartmann wavefront; extreme ultraviolet ... See more keywords

Cross-Correlation Algorithm Based on Speeded-Up Robust Features Parallel Acceleration for Shack–Hartmann Wavefront Sensing

Sign Up to like & get
recommendations! Published in 2024 at "Photonics"

DOI: 10.3390/photonics11090844

Abstract: A cross-correlation algorithm to obtain the sub-aperture shifts that occur is a crucial aspect of scene-based SHWS (Shack–Hartmann wavefront sensing). However, when the sub-image is partially absent within the atmosphere, the traditional cross-correlation algorithm can… read more here.

Keywords: shack hartmann; correlation algorithm; wavefront sensing; hartmann wavefront ... See more keywords