Results 21 to 30 of about 1,870,110 (224)

First Earth-Imaging CubeSat with Harmonic Diffractive Lens

Remote Sensing, 2022
Launched in March 2021, the 3U CubeSat nanosatellite was the first ever to use an ultra-lightweight harmonic diffractive lens for Earth remote sensing.
N. Ivliev, V. Evdokimova, V. Podlipnov, M. Petrov, S. Ganchevskaya, Ivan Tkachenko, Dmitry Abrameshin, Yuriy V. Yuzifovich, A. Nikonorov, R. Skidanov, N. Kazanskiy, V. Soifer   +11 more
semanticscholar   +1 more source

Clinical outcome of diffractive multifocal lens versus monofocal lens in post-laser in situ keratomileusis patients: A retrospective, comparative study

Indian Journal of Ophthalmology, 2023
Purpose: To compare the clinical outcomes of diffractive multifocal and monofocal lenses in post-laser in situ keratomileusis (LASIK) patients who underwent cataract surgery.
Anny M S Cheng, Han Y Yin, Connor Davenport, Keith Walter   +3 more
doaj   +1 more source

An achromatic X-ray lens

Nature Communications, 2022
X-ray diffractive and refractive optical elements suffer from chromatic aberrations, limiting high-resolution X-ray microscopes mainly to bright synchrotron sources.
Adam Kubec, Marie-Christine Zdora, Umut T. Sanli, Ana Diaz, Joan Vila-Comamala, Christian David   +5 more
doaj   +1 more source

Minimal focal spot obtained by focusing circularly polarized light

Компьютерная оптика, 2023
In this paper, using the Richards-Wolf equations, we analyze focusing circularly polarized light with flat diffractive lenses. It is shown that as the numerical aperture of the lens increases, the size of the focal spot first decreases and then begins to
S.S. Stafeev, V.D. Zaitcev, V.V. Kotlyar
doaj   +1 more source

Visualization of Ray Propagation through Extended Depth-of-Focus Intraocular Lenses

Diagnostics, 2022
Extended depth-of-focus (EDoF) presbyopia-correcting intraocular lens (IOL) models differ in their optical design and performance. In the laboratory, we compared the ray propagation and light intensity profiles of four IOLs: the non-diffractive AcrySof ...
Isabella D. Baur, Gerd U. Auffarth, Weijia Yan, Grzegorz Łabuz, Ramin Khoramnia   +4 more
doaj   +1 more source

A theoretical framework for general design of two-materials composed diffractive fresnel lens

Scientific Reports, 2021
Near 100% of diffractive efficiency for diffractive optical elements (DOEs) is one of the most required optical performances in broadband imaging applications.
Ming-Yen Lin, Chih-Hao Chuang, Tzu-An Chou, Chien-Yu Chen   +3 more
doaj   +1 more source

SUBWAVELENGTH DIFFRACTIVE PHOTONIC CRYSTAL LENS [PDF]

Progress In Electromagnetics Research B, 2008
We applied the principles of photonic crystal devices to the millimeter wave portion of the electromagnetic spectrum. For the lens, we have observed their collimation and imaging ability both shown in the amplitude and phase. The results described in the report shown that the diffractive photon crystal lens is a perspective candidate to subwavelength ...
Igor Minin, Viktor Kotlyar, Ya. Triandafilov, Oleg Minin   +3 more
openaire   +1 more source

Spectral Effects and Range of Focus in a Multizonal-Refractive Intraocular Lens Compared with a Standard Trifocal Diffractive Design

Ophthalmology and Therapy, 2023
Introduction This study was performed to compare the optical performance of a multizonal presbyopia-correcting intraocular lens (IOL) and a conventional trifocal model.
Weijia Yan, Gerd U. Auffarth, Ramin Khoramnia, Grzegorz Łabuz   +3 more
doaj   +1 more source

STUDY ON HIGH RESOLUTION MEMBRANE-BASED DIFFRACTIVE OPTICAL IMAGING ON GEOSTATIONARY ORBIT [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Diffractive optical imaging technology provides a new way to realize high resolution earth observation on geostationary orbit. There are a lot of benefits to use the membrane-based diffractive optical element in ultra-large aperture optical imaging ...
J. Jiao, B. Wang, C. Wang, Y. Zhang, J. Jin, Z. Liu, Y. Su, N. Ruan   +7 more
doaj   +1 more source

Design of Refractive/Diffractive Hybrid Projection Lens for DMD-Based Maskless Lithography

Optics, 2021
The projection lens is the core component of DMD-based maskless lithography and its imaging quality directly affects the transferal of exposure pattern.
Zhuohui Xu, Jinyun Zhou, Bo Wang, Ziming Meng   +3 more
doaj   +1 more source