Results 131 to 140 of about 95,373 (320)

Deep learning enabled robust wavefront sensing for active beam smoothing with a continuous phase modulator

High Power Laser Science and Engineering
In laser systems requiring a flat-top distribution of beam intensity, beam smoothing is a critical technology for enhancing laser energy deposition onto the focal spot.
Yamin Zheng, Yifan Zhang, Liquan Guo, Pei Li, Zichao Wang, Yongchen Zhuang, Shibing Lin, Qiao Xue, Deen Wang, Lei Huang   +9 more
doaj   +1 more source

ShaneAO: wide science spectrum adaptive optics system for the Lick Observatory

, 2014
A new high-order adaptive optics system is now being commissioned at the Lick Observatory Shane 3-meter telescope in California. This system uses a high return efficiency sodium beacon and a combination of low and high-order deformable mirrors to achieve
Cabak, Jerry, Deich, William, Dillon, Daren, Gates, John, Gavel, Donald, Kupke, Renate, Lanclos, Kyle, McGurk, Rosalie, Norton, Andrew, Peck, Michael, Pfister, Terry, Phillips, Andrew, Ratliff, Chris, Rockosi, Connie, Saylor, Michael, Srinath, Srikar, Ward, Jim   +16 more
core   +1 more source

Free‐space Optical Computing Systems

Annalen der Physik, EarlyView.
Manipulation and propagation of optical wavefronts in free space enables new intelligent computing hardware. Two types of optical computing systems, matrix and vector multiplication systems and diffractive optical neural network systems, are reviewed from material, device, and system aspects.
Ruiyang Chen, Weilu Gao
wiley   +1 more source

Efficient wavefront sensing for space-based adaptive optics [PDF]

arXiv, 2019
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 AO that is widely used in ground telescopes, space-based AO systems will use focal plane wavefront sensing to measure ...
arxiv  

Wavefront error sensing for LDR [PDF]

Wavefront sensing is a significant aspect of the LDR control problem and requires attention at an early stage of the control system definition and design.
Glavich, T. A., Tubbs, Eldred F.
core   +1 more source

Curvature sensors: noise and its propagation

, 2010
The signal measured with a curvature sensor is here analyzed. In the outset, we derive the required minimum number of sensing elements at the pupil edges, in dependence on the total number of sensing elements.
Aglae Kellerer, Arsenault, Chun, Fried, Graves, Hudgin, Lai, Roddier, Watanabe, Yang   +9 more
core   +1 more source

Recent Advances in Dielectric Chiral Metasurfaces

Advanced Physics Research, EarlyView.
This review article mainly focuses on the recent advances in dielectric chiral metasurfaces, which exhibit remarkable optical chirality. Many new physical conceptions will be introduced during the fast development of the dielectric chiral metasurfaces, such as chiral quasi‐BIC, chiral guided modes, and nonlocal metasurfaces.
Zhipeng Hu, Yuwei Sun, Hongguang Dong, Houxin Fan, Kaige Ding, Yi Jin, Sailing He   +6 more
wiley   +1 more source

Laser Remote Sensing of Seismic Wave with Sub-Millimeter Scale Amplitude Based on Doppler Characteristics Extracted from Wavefront Sensor

Photonics
Laser remote sensing of earthquake waves has the potential to be used in many applications. This article shows a Doppler model for laser remote sensing of seismic waves based on a wavefront sensor. The longitudinal vibration wave is analyzed using remote
Quan Luo, Hongsheng Luo, Guihan Wu, Xiang Ji, Jinshan Su, Wei Jiang   +5 more
doaj   +1 more source

Performance analysis of polychromatic laser guide stars used for wavefront tilt sensing [PDF]

, 2002
Matthias Schöck, R. Foy, Michel Tallon, L. Noethe, J. P. Pique   +4 more
openalex   +1 more source

Integrated Laboratory Demonstrations of Multi-Object Adaptive Optics on a Simulated 10-Meter Telescope at Visible Wavelengths

, 2009
One important frontier for astronomical adaptive optics (AO) involves methods such as Multi-Object AO and Multi-Conjugate AO that have the potential to give a significantly larger field of view than conventional AO techniques.
Ammons, S. Mark, Bauman, Brian J., Gavel, Donald T., Johnson, Luke, Kupke, Renate, Laag, Edward A., Max, Claire E.   +6 more
core   +1 more source