Results 31 to 40 of about 919,980 (236)

Wavefront-sensing with a thin diffuser

, 2017
We propose and implement a broadband, compact, and low-cost wavefront sensing scheme by simply placing a thin diffuser in the close vicinity of a camera. The local wavefront gradient is determined from the local translation of the speckle pattern.
Pascal Berto (1919980), Hervé Rigneault (2482108), Marc Guillon (4180657)   +2 more
core   +1 more source

Calibration and performance evaluation of a monomorph deformable mirror

Results in Optics, 2022
To achieve diffraction-limited performance with a 50 cm solar telescope at the Udaipur solar observatory the development of a high-order adaptive optics (AO) system is currently in progress. The system includes a monomorph deformable mirror (MDM) with 85
A. Raja Bayanna, Bireddy Ramya, Shibu K. Mathew, Rohan E. Louis   +3 more
doaj   +1 more source

Adaptive Optics Methods to Rat Eye Properties: Impact of Pupil Diameter on Wavefront Detection

Photonics
Achieving a high-quality wavefront sensing light spot and accurate wavefront estimation of the rat eye is still challenging due to its large ocular aberrations and the back reflections from fundus multilayer.
Wen Kong, Jiangjie Huang, Yi He, Guohua Shi   +3 more
doaj   +1 more source

Drop‐on‐Demand Printed Negative Dielectric Anisotropy Liquid Crystal Droplets for Adaptive Complex Beam Manipulation and Assessment

Advanced Functional Materials, EarlyView.
Printed negative‐dielectric‐anisotropy liquid‐crystal droplets enable multidimensional full‐vectorial optical‐field sensing across polarization, phase, and wavelength, while also generating tunable skyrmionic‐like complex optical fields. ABSTRACT Adaptive manipulation of vectorial optical fields is important for optical metrology, imaging, and ...
Jinge Guo, Xuke Qiu, Runchen Zhang, Qihao Han, Liangyu Deng, Yishun Lu, Zimo Zhao, Mengmeng Li, Waqas Kamal, Junseok Ma, Yongge Ma, Steve J. Elston, Alfonso A. Castrejón‐Pita, Stephen M. Morris, Chao He   +14 more
wiley   +1 more source

Single-shot hyperspectral wavefront imaging

Nature Communications
Single-shot hyperspectral wavefront sensing is essential for applications like spatio-spectral coupling metrology in high-power laser or fast material dispersion imaging.
Baptiste Blochet, Nathalie Lebas, Pascal Berto, Dimitrios Papadopoulos, Marc Guillon   +4 more
doaj   +1 more source

Single-Shot Wavefront Sensing in Focal Plane Imaging Using Transformer Networks

Optics
Wavefront sensing is an essential technique in optical imaging, adaptive optics, and atmospheric turbulence correction. Traditional wavefront reconstruction methods, including the Gerchberg–Saxton (GS) algorithm and phase diversity (PD) techniques, are ...
Hangning Kou, Jingliang Gu, Jiang You, Min Wan, Zixun Ye, Zhengjiao Xiang, Xian Yue   +6 more
doaj   +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

Monolithically 3D‐Printed Spectral‐Spatial Meta‐Authenticators

Advanced Materials, EarlyView.
A single height map printed in a low‐index resin by two‐photon lithography encodes multiple visible wavelengths in one metasurface without any polarization optics. A fabrication‐aware optimization folds the printable height levels into the design, so the device is printed as optimized.
Cherry Park, Shiqi Hu, Youngsun Jeon, Junsuk Rho   +3 more
wiley   +1 more source

Wavefront sensing for aberration modeling in fluorescence MACROscopy [PDF]

, 2011
International audienceIn this paper, we present an approach to calculate the wavefront in the back pupil plane of an objective in a fluorescent MACROscope.
Zvi Kam, Praveen Pankajakshan, Dieterlen, Alain, Kam, Zvi, Gilbert Engler, Blanc-Féraud, Laure, Olivo-Marin, Jean-Christophe, Pankajakshan, Praveen, Engler, Gilbert, Josiane Zerubia, Zerubia, Josiane, Jean-Christophe Olivo-Marin, Alain Dieterlen, Laure Blanc-Feraud   +13 more
core   +4 more sources

Wavefront error sensing [PDF]

, 1986
A two-step approach to wavefront sensing for the Large Deployable Reflector (LDR) was examined as part of an effort to define wavefront-sensing requirements and to determine particular areas for more detailed study.
Tubbs, Eldred F.
core