Results 31 to 40 of about 5,696 (229)
A Review of Wavefront Sensing and Control Based on Data-Driven Methods
AerospaceOptical systems suffer from wavefront aberrations due to complex atmospheric environments and system component errors, leading to systematic aberrations and significantly degrading optical field quality. Therefore, the detection and correction of optical
Ye Zhang +4 more
doaj +1 more source
Experimental Research on the Correction of Vortex Light Wavefront Distortion
PhotonicsWavefront distortion occurs when vortex beams are transmitted in the atmosphere. The turbulence effect greatly affects the transmission of information, so it is necessary to use adaptive optical correction technology to correct the wavefront distortion ...
Yahang Ge, Xizheng Ke
doaj +1 more source
Improved wavefront correction for coherent image restoration
Optics Express, 2017 Coherent imaging has a wide range of applications in, for example, microscopy, astronomy, and radar imaging. Particularly interesting is the field of microscopy, where the optical quality of the lens is the main limiting factor. In this article, novel algorithms for the restoration of blurred images in a system with known optical aberrations are ...
Claudius Zelenka, Reinhard Koch
openaire +2 more sources
IEEE Photonics JournalA 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 +4 more
doaj +1 more source
Cryogenic wavefront correction using membrane deformable mirrors
Optics Express, 2001 Micro-machined membrane deformable mirrors (MMDMs) are being evaluated for their suitability as wavefront correctors at cryogenic temperatures. Presented here are experimental results for the change in the initial mirror figure of 37-channel MMDMs from OKO Technologies upon cooling to T=78K. The changes in the influence functions are also explored.
H, Dyson +3 more
openaire +2 more sources
Performance Comparison of Wavefront-Sensorless Adaptive Optics Systems by Using of the Focal Plane
International Journal of Optics, 2015 The correction capability and the convergence speed of the wavefront-sensorless adaptive optics (AO) system are compared based on two different system control algorithms, which both use the information of focal plane.
Huizhen Yang, Zhen Zhang, Jian Wu
doaj +1 more source
Atmospheric Turbulence Aberration Correction Based on Deep Learning Wavefront Sensing
Sensors, 2023 In this paper, research was conducted on Deep Learning Wavefront Sensing (DLWS) neural networks using simulated atmospheric turbulence datasets, and a novel DLWS was proposed based on attention mechanisms and Convolutional Neural Networks (CNNs).
Jiang You +5 more
doaj +1 more source
Three‐dimensional Antimony Sulfide Based Flat Optics
Advanced Functional Materials, EarlyView.This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang +18 more
wiley +1 more source
Imaging of Biphoton States: Fundamentals and Applications
Advanced Functional Materials, EarlyView.Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley +1 more source
Study on Aberration Correction of Adaptive Optics Based on Convolutional Neural Network
Photonics, 2021 The existence of aberrations has always been an important limiting factor in the imaging field. Especially in optical microscopy imaging, the accumulated aberration of the optical system and the biological samples distorts the wavefront on the focal ...
Jin Li +6 more
doaj +1 more source