Results 51 to 60 of about 2,844,522 (254)

Accuracy characterization of Shack–Hartmann sensor with residual error removal in spherical wavefront calibration

Light: Advanced Manufacturing
The widely used Shack–Hartmann wavefront sensor (SHWFS) is a wavefront measurement system. Its measurement accuracy is limited by the reference wavefront used for calibration and also by various residual errors of the sensor itself.
Yi He, Mingdi Bao, Yiwei Chen, Hong Ye, Jinyu Fan, Guohua Shi   +5 more
doaj   +1 more source

Subaperture wavefront measurement using Talbot interferometry [PDF]

, 2016
A method based on sub aperture stitching for measurement of a freeform wavefront is proposed and applied to wavefronts calculated from the slope data acquired using a Talbot wavefront sensor.
Pant, Kamal, Bichra, Mohamed, Sabitov, Nail, Ramu, D., Sinzinger, Stefan, Khan, Gufran Sayeed   +5 more
core  

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

'Shack-Hartmann Wavefront Sensor based on an Industrial Smart Camera

, 2012
Wavefront sensing is important in many optical measurement systems and adaptive optics. The speed of the wavefront sensor determines the achievable temporal resolution of dynamic measurements and the bandwidth of adaptive optics systems.
Paris, René, Thier, Markus, Schitter, Georg, Thurner, Thomas   +3 more
core   +1 more source

Monte Carlo simulation of interferometric measurement and wavefront shaping under influence of shot noise and camera noise

JPhys Photonics
Interferometry often serves as an essential building block of wavefront shaping systems to obtain optimal wavefront solutions. In this tutorial, we provide a Monte Carlo simulation tool to calculate the accuracy of interferometric measurements and its ...
Chunghyeong Lee, Jaeyeon Oh, Hakseok Ko, Mooseok Jang   +3 more
doaj   +1 more source

Wavefront-Guided and Wavefront-Optimised Laser Treatments

, 2012
Optical aberrations of the eye are the errors of the optical system that limit the resolution, contrast and amount of detail in the image formed on the retina. Wavefront technology allows us to measure these optical aberrations, calculate mathematically,
Canan Aslı Utine, YILDIRIM, CANAN ASLI
core   +1 more source

TacScope: A Miniaturized Vision‐Based Tactile Sensor for Surgical Applications

Advanced Robotics Research, EarlyView.
TacScope is a compact, vision‐based tactile sensor designed for robot‐assisted surgery. By leveraging a curved elastomer surface with pressure‐sensitive particle redistribution, it captures high‐resolution 3D tactile feedback. TacScope enables accurate tumor detection and shape classification beneath soft tissue phantoms, offering a scalable, low‐cost ...
Md Rakibul Islam Prince, Sheeraz Athar, Pokuang Zhou, Yu She   +3 more
wiley   +1 more source

[Wavefront-guided and wavefront-optimised LASEK--comparison of clinical results]

, 2009
PURPOSE: The aim of this study was to compare refractive outcomes and wavefront results in eyes undergoing wavefront-optimised and wavefront-guided LASEK.
von Mohrenfels, CW;Khoramnia, R;Salgado, J;Maier, MM;Löhmann, C, C. Winkler von Mohrenfels, R. Khoramnia, M. Maier, J. Salgado, C. Lohmann   +5 more
core   +1 more source

Accuracy Analysis of Measuring Cylindrical Surfaces with Complex Parameters Using Two-Dimensional Pseudo Lateral Shearing Interferometry

Photonics
Cylindrical surfaces with complex parameters (CSCP), including off-axis, aspheric, and other properties, constitute fundamental components within complex optical systems.
Le Zhao, Zhongming Zang, Siqi Zhang, Yang Chen, Yueqing Zheng, Zhitian Niu, Jing Yu, Weizhou Luo, Zhu Li, Ming Kong, Shiling Wang, Kuo Hai   +11 more
doaj   +1 more source

Deep‐Learning‐Based Denoising for Improved Phase Precision in Electron Holography of Electromagnetic Fields in Nanoscale Materials

Advanced Science, EarlyView.
Low‐dose electron holography is limited by shot noise, which buries weak phase signals. HoloDenoiser, a physics‐informed network that works simultaneously in the spatial and frequency domains, locates and protects the holographic sideband while suppressing noise in the hologram.
Ye Luo, Luyang Wang, Zhiling Yu, Xiaowen Chen, Xiaoyu Wang, Ya‐Hui Jia, Thibaud Denneulin, Yu Han, Rafal E. Dunin‐Borkowski, Fengshan Zheng, Qi Liu   +10 more
wiley   +1 more source