Results 51 to 60 of about 45,422,298 (247)
The Influence of extracellular matrix on lens epithelial cell viability [PDF]
, 2006 Posterior capsular opacification is the main complication of cataract surgery and results from the proliferation, migration and differentiation of lens epithelial cells remaining in the capsular bag. To better understand this pathological cell behaviour,
Frederique, M D Tholozan +1 more
core
Determinants of the frequency of contact lens wear
, 2013 Objectives\ud \ud To characterize and discover the determinants of the frequency of wear (FOW) of contact lenses.\ud \ud Methods \ud \ud Survey forms were sent to contact lens fitters in up to 40 countries between January and March every year for 5 ...
Morgan, Philip B. +3 more
core +2 more sources
Automated Micro-Object Detection for Mobile Diagnostics Using Lens-Free Imaging Technology
Diagnostics, 2016 Lens-free imaging technology has been extensively used recently for microparticle and biological cell analysis because of its high throughput, low cost, and simple and compact arrangement.
Mohendra Roy +5 more
doaj +1 more source
Synthesis of a Luneburg lens with a flat surface using quasi-conformal transformation optics
Физика волновых процессов и радиотехнические системы, 2020 In modern systems of radiolocation, navigation and communication, the requirements for antennas are becoming higher requirements every year, namely: operation in a wide frequency range, the ability to change of direction of the main lobe of the radiation
Andrey V. Lazarev +3 more
doaj +1 more source
The Astronomical Journal, 2023 We present an analysis of microlensing event OGLE-2019-BLG-0825. This event was identified as a planetary candidate by preliminary modeling. We find that significant residuals from the best-fit static binary-lens model exist and a xallarap effect can fit
Yuki K. Satoh +93 more
doaj +1 more source
APL Photonics, 2019 The crystalline lens and cornea comprise the eye’s optical system for focusing light in human vision. The changes in biomechanical properties of the lens and cornea are closely associated with common diseases, including presbyopia and cataract. Currently,
Yan Li +8 more
doaj +1 more source
Nanophotonics, 2022 We generate a spatiotemporal optical vortex (STOV) with tunable orbital angular momentum (OAM) orientation by a simple lens system. We utilize a cylindrical lens system, which is an astigmatic mode converter, to add longitudinal angular momentum to tilt ...
Zang Yimin, Mirando Amal, Chong Andy
doaj +1 more source
Tunable hyperchromatic lens system for confocal hyperspectral sensing.
Optics Express, 2013 A new approach for confocal hyperspectral sensing based on the combination of a diffractive optical element and a tunable membrane fluidic lens is demonstrated. This highly compact lens system is designed to maximize the longitudinal chromatic aberration
Phuong-Ha Cu-Nguyen +5 more
semanticscholar +1 more source
The soft-focus lens and Anglo-American pictorialism [PDF]
, 2008 Electronic version excludes illustrations for which permission has not been granted by the rights holderThe history, practice and aesthetic of the soft focus lens in photography is elucidated and developed from its earliest statements of need to the ...
Young, William Russell
core +2 more sources
Design of a tube lens with a focus tunable lens for optical inspection systems
Scientific ReportsOptical inspection systems use large numerical apertures (NAs) to achieve high resolution. However, as the NA increases, the depth of field decreases significantly, causing images to blur easily with slight object shifts.
Younghoon Park +3 more
doaj +1 more source