Results 1 to 10 of about 243,905 (335)

Aberration-Free Ultrathin Flat Lenses and Axicons at Telecom Wavelengths Based on Plasmonic Metasurfaces

Nano Letters, 2012
The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength spaced optical antennas.
Francesco Aieta, patrice Genevet, Mikhail A Kats   +2 more
exaly   +3 more sources

An analysis of methods for aberrated spot diagram center evaluation [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2021
The paper considers spot diagram center evaluation methods and errors depending on aberration type and value. The authors present the modified center of mass method which provides higher accuracy of center evaluation for spot diagram with coma.
Tatiana V. Ivanova, Elizaveta Yu. Letova, Olga S. Kalinkina, Darya V. Nikiforova, Vladimir E. Strigalev   +4 more
doaj   +1 more source

HISTORY OF LOW-FREQUENCY RESEARCH OF PULSARS [PDF]

Radio Physics and Radio Astronomy, 2021
Purpose: The main most pronounced events, which occurred in the initial period of the pulsars’ study at the decameter wavelength range, are presented.
O. M. Ulyanov
doaj   +1 more source

Visual performance after conventional LASIK and wavefront-guided LASIK with iris-registration:results at 1 year [PDF]

International Journal of Ophthalmology, 2013
AIM: To compare visual performance of wavefront-guided laser in situ keratomileusis (LASIK) with iris-registration (Wg-LASIK group) and conventional LASIK (LASIK group) one year after surgery and analyze the correlation between wavefront aberrations and ...
Jing Zhang, Yue-Hua Zhou, Rui Li, Lei Tian   +3 more
doaj   +1 more source

iSMART Contoura laser-assisted in situ keratomileusis: A new planning software

Indian Journal of Ophthalmology, 2022
Background: Topography guided laser-assisted in situ keratomileusis (LASIK) has always been some sort of an enigma in terms of its understanding and interpretation.
Zain Khatib
doaj   +1 more source

From Retrograde Menstruation to Endometrial Determinism and a Brave New World of “Root Treatment” of Endometriosis: Destiny or a Fanciful Utopia?

Biomolecules, 2023
Practically unknown outside of China, the “endometrial determinism” theory was proposed to account for the apparent gap between the relatively low prevalence of endometriosis and nearly universal retrograde menstruation.
Sun-Wei Guo, Marwan Habiba, Giuseppe Benagiano   +2 more
doaj   +1 more source

Aberration Theory of a Flat, Aplanatic Metalens Doublet and the Design of a Meta-Microscope Objective Lens

Sensors, 2023
A theoretical approach for reducing multiple monochromatic aberrations using a flat metalens doublet is proposed and verified through ray tracing simulations.
Woojun Han, Jinsoo Jeong, Jaisoon Kim, Sun-Je Kim   +3 more
doaj   +1 more source

DEFINITION LENS DISTORTION CAMERA WHEN PHOTOGRAMMETRIC IMAGE PROCESSING

Вестник Дагестанского государственного технического университета: Технические науки, 2016
In this paper we consider the classical method of calculating the magnitude of the distortion, and the account of its impact on the offset image points on the field image.
S. N. Mamedbekov
doaj   +1 more source

Two-Year Visual Outcomes of Evolution Implantable Collamer Lens and Small Incision Lenticule Extraction for the Correction of Low Myopia

Frontiers in Medicine, 2022
PurposeTo investigate the 2-year visual quality of Evolution Implantable Collamer Lens (EVO-ICL) and small incision lenticule extraction (SMILE) for the correction of low myopia.MethodsIn this prospective study, we included 25 eyes of 25 patients (7 men)
Mengjun Fu, Meiyan Li, Meiyan Li, Meiyan Li, Meiyan Li, Yiyong Xian, Yiyong Xian, Yiyong Xian, Yiyong Xian, Zhiqiang Yu, Zhiqiang Yu, Zhiqiang Yu, Zhiqiang Yu, Haorun Zhang, Joanne Choi, Lingling Niu, Lingling Niu, Lingling Niu, Lingling Niu, Xiaoying Wang, Xiaoying Wang, Xiaoying Wang, Xiaoying Wang, Xingtao Zhou, Xingtao Zhou, Xingtao Zhou, Xingtao Zhou   +26 more
doaj   +1 more source

The influence of Galactic aberration on precession parameters determined from VLBI observations [PDF]

, 2010
The influence of proper motions of sources due to Galactic aberration on precession models based on VLBI data is determined. Comparisons of the linear trends in the coordinates of the celestial pole obtained with and without taking into account Galactic ...
A. M. Clerke, C. Ma, E. A. Popova, J. Kovalevsky, J. L. Fanselow, J.-C. Liu, N. Capitaine, N. Capitaine, O. J. Sovers, O. Titov, O. Titov, O. Titov, O. Titov, O. Titov, O. Titov, S. A. Klioner, S. Kopeikin, T. M. Eubanks, V. E. Zharov, V. E. Zharov, V. V. Bobylev, V. V. Bobylev, W. Schlüter, Z. M. Malkin, Z. M. Malkin, Z. M. Malkin, Z. M. Malkin, Z. M. Malkin, Z. Malkin, Z. Malkin, Z. Malkin   +30 more
core   +1 more source