Results 61 to 70 of about 11,638 (169)

Evaluation of Corneal Irregular Astigmatism and Visual Quality Following Bilateral Sequential SMILE and LASEK: A Six‐Year Comparative Study

Journal of Ophthalmology, Volume 2026, Issue 1, 2026.
Purpose To compare the corneal spherical component (SC), regular astigmatism (RA), irregular astigmatism (IA, including asymmetry and irregularity), and visual quality 6 years after small incision lenticule extraction (SMILE) and laser subepithelial keratomileusis (LASEK) for mild‐to‐moderate myopia.
Hua Li, Weinan Hu, Min Li, Yuehui Shi, Lina Sun, Xiaoyun Ma, Jun Zou, Shengjie Li   +7 more
wiley   +1 more source

Adaptive optics design for high-energy kW-class multi-slab laser amplifiers

High Power Laser Science and Engineering
We demonstrate real-time wavefront correction in a high-energy high-average-power DiPOLE100/Bivoj laser using adaptive optics. A bimorph deformable mirror and a Shack–Hartmann wavefront sensor reduced wavefront error 10-fold and improved the Strehl ratio
Tomáš Paliesek, Martin Divoký, Jan Pilař, Martin Smrž, Tomáš Mocek   +4 more
doaj   +1 more source

Metasurfaces in Adaptive Optics: A New Opportunity in Optical Wavefront Sensing

Laser &Photonics Reviews, Volume 19, Issue 24, December 17, 2025.
Wavefront sensing constitutes a critical component of adaptive optics systems, aimed at quantitatively measuring distorted wavefronts and enabling closed‐loop correction in optical setups. Metasurfaces, as planar optical elements composed of nanoscale structures, provide exceptional freedom in modulating multiple dimensions of the light field.
Rundong Fan, Zichao Wang, Pei Li, Lei Huang   +3 more
wiley   +1 more source

The QuickSee autorefractor reliably measures the accommodative response in children compared with the Shin‐Nippon autorefractor

Ophthalmic and Physiological Optics, Volume 45, Issue 7, Page 1581-1590, November 2025.
Abstract Introduction This study evaluated the QuickSee autorefractor for measurement of the accommodative response in a cohort of children without significant ametropia, and compared the findings to those determined using the gold‐standard Shin‐Nippon device. Methods Children aged 5–7 years were recruited.
Jane M. Fulton, Rebecca E. Leighton, Tuyishime Didier Fidele Uwacu, Bruce Moore, Julie‐Anne Little   +4 more
wiley   +1 more source

A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays

Applied Sciences, 2018
An array of compound refractive X-ray lenses (CRL) with 20 × 20 lenslets, a focal distance of 20cm and a visibility of 0.93 is presented. It can be used as a Shack-Hartmann sensor for hard X-rays (SHARX) for wavefront sensing and permits for true ...
Tomy dos Santos Rolo, Stefan Reich, Dmitry Karpov, Sergey Gasilov, Danays Kunka, Edwin Fohtung, Tilo Baumbach, Anton Plech   +7 more
doaj   +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

Extracting more than two orthogonal derivatives from a Shack-Hartmann wavefront sensor.

Optics Express, 2020
The purpose of this paper is to show that the Shack-Hartmann wavefront sensor (SHWFS) gives access to more derivatives than the two orthogonal derivatives classically extracted either by estimating the centroid or by taking into account the first two ...
B. Rouzé, G. Giakoumakis, Adrien Stolidi, J. Jaeck, C. Bellanger, J. Primot   +5 more
semanticscholar   +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

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