Results 61 to 70 of about 1,162,754 (127)

Single-shot quantitative aberration and scattering length measurements in mouse brain tissues using an extended-source Shack-Hartmann wavefront sensor [PDF]

, 2022
Deep fluorescence imaging in mammalian brain tissues remains challenging due to scattering and optical aberration-induced loss in signal and resolution.
Imperato, Sophia, Harms, Fabrice, Fragola, Alexandra, Hubert, Antoine, Bourdieu, Laurent, Mercier, Mathias   +5 more
core   +1 more source

Spin‐Orbit Photonics with Potato Starch Lenses

Advanced Optical Materials, Volume 13, Issue 21, July 25, 2025.
Native potato starch spherulites are introduced as volumetric optical elements that modulate both dynamic and geometric phases of light. These spherulites focus light and generate optical vortices via spin‐orbit interaction, functioning as polarization‐sensitive microlenses. Their unique radial anisotropy enables applications in vortex beam generation,
Petr Bouchal, Petr Viewegh, Petr Liška, Radim Chmelík, Zdeněk Bouchal   +4 more
wiley   +1 more source

Swept-source coherence-gated Shack-Hartmann wavefront sensor

, 2012
In this report we investigate the possibility of narrowing the depth range of a physical Shack-Hartmann wavefront sensor (SH-WFS) using coherence gating technique in spectral domain.
Wang, Jingyu, Podoleanu, Adrian Gh., Jingyu Wang, Adrian Gh. Podoleanu   +3 more
core   +1 more source

Analysis of design for Hartmann-Shack measurements under usage of Fourier-iteration and Zernike approximation wavefront reconstruction methods

, 2022
Paper 97171P, 6 S.The measurement of a wavefront is a powerful tool for characterizing optical systems. The most commonly used wavefront measurement technique is the method of local-light aberrometry.
Hartmann, Peter, Baselt, Tobias, Kabardiadi, Alexander, Greiner, Andreas, Aßmann, Heiko   +4 more
core   +1 more source

Chip-integrated metasurface with double-helix point spread functions for ultra-large dynamic range wavefront sensing

Nature Communications
Wavefront sensing underpins diverse optical technologies, requiring compact sensors with large dynamic range, high spatial sampling density, and photonic integration. Conventional Shack-Hartmann sensors offer only ~±1° intrinsic geometric dynamic range, ~
Yanhao Chu, Xiaopeng Li, Xian Long, Jiacheng Sun, Jian Li, Jitao Ji, Junyi Wang, Shining Zhu, Tao Li   +8 more
doaj   +1 more source

A new low-cost, compact, auto-phoropter for refractive assessment in developing countries

Scientific Reports, 2017
Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system
Babak Amirsolaimani, Gholam Peyman, Jim Schwiegerling, Arkady Bablumyan, N. Peyghambarian   +4 more
doaj   +1 more source

Research Progress on Atmospheric Turbulence Perception and Correction Based on Adaptive Optics and Deep Learning

Advanced Photonics Research, Volume 6, Issue 7, July 2025.
This work presents a systematic review of atmospheric turbulence fundamentals, including theoretical formulations and adaptive optics‐based mitigation strategies. This includes an in‐depth examination of the devices, theories, and methodologies associated with traditional correction approaches.
Qinghui Liu, Yihang Di, Mengmeng Zhang, Zhenbo Ren, Jianglei Di, Jianlin Zhao   +5 more
wiley   +1 more source

Shack-Hartmann sensor as an imaging system with a phase diversity

, 2020
Conventional methods of wavefront reconstruction from the raw data of the Shack-Hartmann sensor use the focal spot shifts and discard the high-frequency information about the wavefront.
Gleb Vdovin (3957050), Hieu Thao Nguyen (17519859), Nickolai Belashenkov (17519865), Oleg Soloviev (4334791), Vitalii Bezzubik (17519862), Michel Verhaegen (3955943)   +5 more
core   +1 more source

Optical characterisation and vision quality assessment of two myopia control contact lenses

Ophthalmic and Physiological Optics, Volume 45, Issue 5, Page 1142-1150, July 2025.
Abstract Purpose This investigation examined the image and vision quality of two commercially available daily disposable myopia control soft contact lenses. Methods Wavefront errors were measured with an SHS Ophthalmic aberrometer for two myopia control soft contact lenses: a coaxially designed dual‐focus lens (omafilcon A, CooperVision MiSight® 1 day,
Josh Richards, Matt Jaskulski, Jill Woods, Sarah Guthrie, Pete Kollbaum   +4 more
wiley   +1 more source

Spectral characterization of optical aberrations in fluidic lenses

Frontiers in Physics
We report an extensive numerical study and supporting experimental results on the spectral characterization of optical aberrations in macroscopic fluidic lenses with tunable focal distance and aperture shape.
Graciana Puentes, Graciana Puentes, Fernando Minotti, Fernando Minotti   +3 more
doaj   +1 more source