Results 21 to 30 of about 1,039,039 (252)

Depth-Resolved Wavefront Aberrations using a Coherence-Gated Shack-Hartmann Wavefront Sensor [PDF]

, 2010
In the present paper we investigate the possibility of narrowing the depth range of a physical Shack - Hartmann (SH) wavefront sensor (WFS) by using coherence gating.
Tuohy, Simon, Podoleanu, Adrian G.H.
core   +1 more source

Multi-faceted digital pyramid wavefront sensor [PDF]

, 2022
The modulated pyramid wavefront sensor is known for its high sensitivity and adjustable dynamic range. The need for mechanically moving parts in a modulated pyramid wavefront sensor can be overcome by using the recently proposed digital pyramid wavefront
Vohnsen, Brian, Akondi, Vyas, Castillo, Sara   +2 more
core   +1 more source

Polarized Shack-Hartmann wavefront sensor

Frontiers in Physics, 2023
Shack-Hartmann wavefront sensor (SHWFS) has been widely used in adaptive optics (AO) systems to detect phase distortion characteristics. In laser communication, target detection, vision optics and other application fields, the performance of SHWFS is ...
Yanrong Yang, Yanrong Yang, Yanrong Yang, Linhai Huang, Linhai Huang, Yawei Xiao, Yawei Xiao, Naiting Gu, Naiting Gu   +8 more
doaj   +1 more source

One-Dimensional High-Resolution Wavefront Sensor Enabled by Subwavelength Compound Gratings

Photonics, 2023
Angle sensors are widely used for wavefront measurements, which is attributed to their integration and robustness. Currently, commercial sensors are available with pixel sizes in the order of wavelengths.
Yunlong Meng, Xinyu Shen, Junyang Xie, Yao Peng, Xiaowen Shao, Feng Yan, Cheng Yang   +6 more
doaj   +1 more source

Wavefront Sensing for Evaluation of Extreme Ultraviolet Microscopy

Sensors, 2020
Wavefront analysis is a fast and reliable technique for the alignment and characterization of optics in the visible, but also in the extreme ultraviolet (EUV) and X-ray regions.
Mabel Ruiz-Lopez, Masoud Mehrjoo, Barbara Keitel, Elke Plönjes, Domenico Alj, Guillaume Dovillaire, Lu Li, Philippe Zeitoun   +7 more
doaj   +1 more source

Wide-field AO correction: the large wavefront sensor detector of ARGOS [PDF]

, 2010
Wide field correction allowing large field to benefit from adaptive optics (AO) is challenging in more than one aspect. We address here the wavefront sensor (WFS) detector side where, in addition to high sensitivity and low noise, the simultaneous ...
Hart, M., Gaessler, Wolfgang, Deysenroth, Matthias, Deysenroth, M., Sebastian Rabien, Simone Esposito, Wolfgang Gaessler, Gemperlein, Hans, Strüder, L., Barl, Lothar, Lothar Barl, Rabien, Sebastian, Michael Hart, Ziegleder, Julian, Hans Gemperlein, Orban de Xivry, Gilles, Hart, Michael, Matthias Deysenroth, Lothar Strüder, Gilles Orban de Xivry, Strüder, Lothar, Esposito, S., Ziegleder, J., Barl, L., Gaessler, W., Orban de Xivry, G., Gemperlein, H., Julian Ziegleder, Esposito, Simone, Rabien, S.   +29 more
core   +1 more source

Experimental Demonstration of Sequential Operation Approach for a Three-Sided Pyramid Wavefront Sensor

IEEE Photonics Journal, 2016
We describe a sequential operation approach for a three-sided pyramid wavefront sensor (PWFS) based on a micromirror array with hexagonal geometry. The geometrical optics analysis and numerical simulations show that a linear relationship exists between ...
Lu Chen, Jianli Wang, Kainan Yao, Xinyue Liu, Xudong Lin, Liang Wang, Minghao Wang   +6 more
doaj   +1 more source

Wavefront Restoration Technology of Dynamic Non-Uniform Intensity Distribution Based on Extreme Learning Machine

Sensors, 2021
Non-uniform intensity distribution of laser near-field beam results in the irregular shape of the spot in the wavefront sensor. The intensity of some sub-aperture spots may be too weak to be detected, and the accuracy of wavefront restoration is ...
Haiqi Lin, Xing He, Shuai Wang, Ping Yang   +3 more
doaj   +1 more source

Measuring Ocular Aberrations Sequentially Using a Digital Micromirror Device

Micromachines, 2019
The Hartmann⁻Shack wavefront sensor is widely used to measure aberrations in both astronomy and ophthalmology. Yet, the dynamic range of the sensor is limited by cross-talk between adjacent lenslets.
Alessandra Carmichael Martins, Brian Vohnsen   +1 more
doaj   +1 more source

Deep Learning-Based Prediction Algorithm on Atmospheric Turbulence-Induced Wavefront for Adaptive Optics

IEEE Photonics Journal, 2022
Correction performance of an adaptive optics (AO) system is severely limited by its system latency under high temporal frequency distortions. Wavefront prediction methods has been proven to be an effective way to compensate system delay.
Ning Wang, Licheng Zhu, Shuai Ma, Wang Zhao, Xinlan Ge, Zeyu Gao, Kangjian Yang, Shuai Wang, Ping Yang   +8 more
doaj   +1 more source