Results 1 to 10 of about 656,340 (251)

Combined hardware and computational optical wavefront correction. [PDF]

Biomed Opt Express, 2018
In many optical imaging applications, it is necessary to overcome aberrations to obtain high-resolution images. Aberration correction can be performed by either physically modifying the optical wavefront using hardware components, or by modifying the wavefront during image reconstruction using computational imaging. Here we address a longstanding issue
South FA, Kurokawa K, Liu Z, Liu YZ, Miller DT, Boppart SA.   +5 more
europepmc   +5 more sources

Filtered Influence Function of Deformable Mirror for Wavefront Correction in Laser Systems

Photonics, 2021
An influence function filtering method (IFFM) is presented to improve the wavefront correction capability in laser systems by curbing the correction performance degradation resulted from the IF measurement noise.
Yamin Zheng, Ming Lei, Shibing Lin, Deen Wang, Qiao Xue, Lei Huang   +5 more
doaj   +3 more sources

Improved Wavefront Reconstruction and Correction Strategy for Adaptive Optics System With a Plenoptic Sensor

IEEE Photonics Journal, 2021
Wavefront reconstruction and correction under strong turbulence has become a crucial issue for adaptive optics systems. An approach using a plenoptic sensor has attracted high attention recently.
Jintian Hu, Tao Chen, Xudong Lin, Liang Wang, Qichang An, Zhichong Wang   +5 more
doaj   +3 more sources

A Relativistic Adaptive Gradient Descent Enhanced SPGD Algorithm for Wavefront Sensorless Adaptive Optics [PDF]

Micromachines
Deformable mirrors (DMs) serve as the core wavefront correction devices in wavefront sensorless adaptive optics (AO) systems, and their performance is predominantly determined by the convergence speed and stability of the control algorithm.
Huizhen Yang, Lingzhe Tang, Peng Chen, Chen Sun, Xinyu Xiao, Zhiguang Zhang, Jiacheng Zhou   +6 more
doaj   +2 more sources

Low Spatio-Temporal Frequency Wavefront Aberration Correction Method Based on a Movable Secondary Mirror

IEEE Photonics Journal
A low frequency wavefront aberration correction method for solar telescopes based on secondary mirror movement is proposed to correct dynamic wavefront aberration during the operation of solar telescope.
Yawei Xiao, Simin Zhao, Junbo Zhang, Linhai Huang, Naiting Gu   +4 more
doaj   +3 more sources

Automatic Modal Wavefront Estimation and Correction for Optical Aberration

IEEE Photonics Journal, 2019
Modal estimation of aberration can quantify the amount of aberration, which plays an important role in optical system optimization, aberration correction, and so on. Here, we propose a simple but effective method to find the modal wavefront of aberration.
Xiaomin Lai, Chen Xu, Yafeng Liu, Kaihua Wei, Kaihua Wu   +4 more
doaj   +3 more sources

Experimental Verification of Model-Based Wavefront Sensorless Adaptive Optics System for Large Aberrations [PDF]

Micromachines
To address the limitations of conventional wavefront sensorless adaptive optics (AO) systems regarding iteration efficiency and convergence speed, this study conducts an experimental validation of a model-based wavefront sensorless AO approach.
Huizhen Yang, Yongqiang Miao, Peng Chen, Zhiguang Zhang, Zhaojun Yan   +4 more
doaj   +2 more sources

Improving Focal Photostimulation of Cortical Neurons with Pre-derived Wavefront Correction [PDF]

Frontiers in Cellular Neuroscience, 2017
Recent progress in neuroscience to image and investigate brain function has been made possible by impressive developments in optogenetic and opto-molecular tools.
Vincent R. Daria, Julian M. C. Choy, Sharmila S. Sané, Woei M. Lee, Christian Stricker, Christian Stricker, Hans A. Bachor   +6 more
doaj   +2 more sources

X-Ray Single-Grating Interferometry for Wavefront Measurement and Correction of Hard X-Ray Nanofocusing Mirrors

Sensors, 2020
X-ray single-grating interferometry was applied to conduct accurate wavefront corrections for hard X-ray nanofocusing mirrors. Systematic errors in the interferometer, originating from a grating, a detector, and alignment errors of the components, were ...
Jumpei Yamada, Takato Inoue, Nami Nakamura, Takashi Kameshima, Kazuto Yamauchi, Satoshi Matsuyama, Makina Yabashi   +6 more
doaj   +3 more sources

Adaptive Optical Closed-Loop Control on the Basis of Hyperparametric Optimization of Convolutional Neural Networks

Applied Sciences, 2023
In adaptive optics systems, the precision wavefront sensor determines the closed-loop correction effect. The accuracy of the wavefront sensor is severely reduced when light energy is weak, while the real-time performance of wavefront sensorless adaptive ...
Bo Chen, Yilin Zhou, Jingjing Jia, Yirui Zhang, Zhaoyi Li   +4 more
doaj   +1 more source