Results 131 to 140 of about 11,638 (169)

Arbitrary wavefront uncertainty evaluation for the Shack–Hartmann wavefront sensor using physical optics propagation

Applied Physics Letters, 2023
The Shack–Hartmann wavefront sensor (SHWS) is a common option to characterize optical fields, due to its noninterference, high accuracy, and high-speed advantages.
Jichong Zhou, Qiaozhi He, Yuan Qu, Dineng Zhao, Ziyin Wu, Jiamiao Yang   +5 more
semanticscholar   +1 more source

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

Measurement science and technology, 2021
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 ...
Hu Gu, Ziyun Zhao, Zhi-gao Zhang, Shuo Cao, Jing-jing Wu, Lifa Hu   +5 more
semanticscholar   +1 more source

Deep learning assisted Shack-Hartmann wavefront sensor for direct wavefront detection.

Optics Letters, 2020
The conventional Shack-Hartmann wavefront sensor (SHWS) requires wavefront slope measurements of every micro-lens for wavefront reconstruction. In this Letter, we applied deep learning on the SHWS to directly predict the wavefront distributions without ...
Lejia Hu, Shuwen Hu, W. Gong, Ke Si
semanticscholar   +1 more source

Calibration of a Shack-Hartmann wavefront sensor using spherical wavefronts from a point source

LASE, 2022
A high-quality flat wavefront is usually used to calibrate the Shack-Hartmann wavefront sensors. The article discusses the possibility of calibrating sensors with spherical wavefronts.
A. Nikitin, I. Galaktionov, J. Sheldakova, A. Kudryashov, D. Denisov, A. Zolotukhina   +5 more
semanticscholar   +1 more source

Shack–Hartmann wavefront sensor based on Kalman filter

Optical Engineering: The Journal of SPIE, 2022
. The Shack–Hartmann wavefront sensor (SHWFS) traditionally employs the center of gravity (CoG), windowing, and thresholding CoG (TCoG) algorithms to measure wavefront aberrations.
De Gu, Xing Liu
semanticscholar   +1 more source

Iterative wavefront reconstruction for strong turbulence using Shack-Hartmann wavefront sensor measurements.

Journal of The Optical Society of America A-optics Image Science and Vision, 2021
An iterative wavefront reconstruction method using Shack-Hartmann wavefront sensor (SHWFS) measurements is presented in this paper. A new cost function for the wavefront reconstruction problem is derived and the solution is obtained iteratively using the
J. J. Kim, B. Fernández, B. Agrawal
semanticscholar   +1 more source

Educational Shack–Hartmann wavefront sensor

American Journal of Physics
The Shack–Hartmann wavefront sensor (SHWFS) is a standard detector used in the measurement of a light wave's wavefront shape. However, its relatively high price restricts its use as an educational tool in instructional optics laboratories.
K. Hassani, Veyana Khajehhassanirabori
semanticscholar   +1 more source

Large dynamic range Shack–Hartmann wavefront sensor based on holographic multipoint generation and pattern correlation

Optical Engineering: The Journal of SPIE
. A principle of a wavefront measurement sensor based on computer generated holograms is presented. In contrast to conventional Shack–Hartmann sensors, the wavefront is not sampled using a lens array but an array of subholograms.
Simon Hartlieb, Zhen Wang, Andrea Rüdinger, T. Haist, S. Reichelt   +4 more
semanticscholar   +1 more source

Atmospheric turbulence profiling with a Shack-Hartmann wavefront sensor

Astronomical Telescopes + Instrumentation, 2020
In order to measure the altitude profile of the atmospheric turbulence in real-time, we are applying a MASSDIMM method (Multi Aperture Scintillation Sensor and Differential Image Motion Monitor) to the ShackHartmann wavefront sensor data.
Hajime Ogane, M. Akiyama, S. Oya, Y. Ono
semanticscholar   +1 more source

High-resolution wavefront reconstruction using multiframe Shack–Hartmann wavefront sensor measurements

Optical Engineering: The Journal of SPIE, 2020
. 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.
Zhilei Ren, Jin Liu, Zhentao Zhang, Zhitao Chen, Yonghui Liang   +4 more
semanticscholar   +1 more source