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
Projected Pupil Plane Pattern:an alternative LGS wavefront sensing technique
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty926
Abstract: For the next generation of extremely large telescopes, Focal Anisoplanatism (FA) renders single Laser Guide Star AO useless. Here we analyze a novel LGS alternative configuration with corresponding wavefront sensing and reconstruction method, termed Projected… read more here.
Keywords: wavefront sensing; laser; plane pattern; projected pupil ... See more keywords
Fiber-Connected Wavefront-Sensing System for Large Segmented Space Telescopes
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2023.3271985
Abstract: A metrology system capable of cofocusing and cophasing is essential to ensure the performance of large segmented space telescopes, similar to that of monolithic telescopes, as well as to image the faintest galaxies. A fiber-linked–wavefront-sensing… read more here.
Keywords: system; space; space telescopes; segmented space ... See more keywords
Efficient wavefront sensing for space-based adaptive optics
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Astronomical Telescopes, Instruments, and Systems"
DOI: 10.1117/1.jatis.6.1.019001
Abstract: Abstract. Future large space telescopes will be equipped with adaptive optics (AO) to overcome wavefront aberrations and achieve high contrast for imaging faint astronomical objects, such as Earth-like exoplanets and debris disks. In contrast to… read more here.
Keywords: focal plane; adaptive optics; space based; wavefront sensing ... See more keywords
Field diversity phase retrieval method for wavefront sensing in monolithic mirror space telescopes.
Sign Up to like & getrecommendations! Published in 2017 at "Applied optics"
DOI: 10.1364/ao.56.004224
Abstract: To guarantee the uniqueness of the solution for the wavefront phase, a series of intensity images with known phase diversities is usually needed in the current phase retrieval wavefront sensing methods. However, to obtain these… read more here.
Keywords: wavefront sensing; phase; diversity; method ... See more keywords
Gradient cross-correlation algorithm for scene-based Shack-Hartmann wavefront sensing.
Sign Up to like & getrecommendations! Published in 2018 at "Optics express"
DOI: 10.1364/oe.26.017549
Abstract: Scene-based wavefront sensing currently uses the periodic-correlation algorithm based on fast Fourier transforms. However, when the object scene contains features at the field edges, the performance of the algorithm is poor due to the periodicity… read more here.
Keywords: wavefront sensing; gradient cross; scene; correlation algorithm ... See more keywords
Deep learning wavefront sensing.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.000240
Abstract: We present a new class of wavefront sensors by extending their design space based on machine learning. This approach simplifies both the optical hardware and image processing in wavefront sensing. We experimentally demonstrated a variety… read more here.
Keywords: learning wavefront; image; wavefront sensing; wavefront ... See more keywords
Single-shot wavefront sensing with deep neural networks for free-space optical communications.
Sign Up to like & getrecommendations! Published in 2021 at "Optics express"
DOI: 10.1364/oe.412929
Abstract: Applying deep neural networks in image-based wavefront sensing allows for the non-iterative regression of the aberrated phase in real time. In view of the nonlinear mapping from phase to intensity, it is common to utilize… read more here.
Keywords: optical communications; space optical; deep neural; neural networks ... See more keywords
Fast wavefront sensing for X-ray optics with an alternating speckle tracking technique.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.460163
Abstract: Advances in accelerator technologies have enabled the continuous development of synchrotron radiation and X-ray free electron laser (XFEL) sources. At the same time, it has been critical to perform in-situ wavefront sensing to aid delivery… read more here.
Keywords: wavefront information; speckle tracking; ray; optics ... See more keywords
Phase-diversity wavefront sensing enhanced by a Fourier-based neural network.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.466292
Abstract: Phase diversity wavefront sensing (PDWS) has been a successful approach to quantifying wavefront aberrations with only a few intensity measurements and nonlinear optimization. However, the inherent non-convexity of the inverse problem may lead to stagnation… read more here.
Keywords: neural network; network; phase diversity; diversity wavefront ... See more keywords
Direct wavefront sensing with a plenoptic sensor based on deep learning.
Sign Up to like & getrecommendations! Published in 2023 at "Optics express"
DOI: 10.1364/oe.481433
Abstract: Traditional plenoptic wavefront sensors (PWS) suffer from the obvious step change of the slope response which leads to the poor performance of phase retrieval. In this paper, a neural network model combining the transformer architecture… read more here.
Keywords: direct wavefront; wavefront; deep learning; model ... See more keywords