Results 61 to 70 of about 61,783 (227)

Laser‐Based In Situ Diagnostics of Temperature and Material‐Growth Dynamics in Photothermal Laser Nanoprinting of ZnO

Laser &Photonics Reviews, EarlyView.
This work elucidates the previously unknown thermal dynamics during sub‐micrometer photothermal laser printing of zinc oxide using a non‐invasive transmission‐based in situ measurement. The elevated temperatures are shown to be highly localized around the laser focal spot, reaching average temperature increases of about 113 K per mW of laser power ...
Steven Kraus, Kristian Kraft, Yolita M. Eggeler, Martin Wegener, Paul Somers   +4 more
wiley   +1 more source

Soft X‐rays with orbital angular momentum for resonant scattering experiments at Synchrotron SOLEIL

Journal of Synchrotron Radiation, EarlyView.
Characterization and testing of a new setup for absorption and scattering experiments with soft X‐rays carrying an orbital angular momentum at the SEXTANTS beamline of Synchrotron SOLEIL are presented.The paper presents a comprehensive description of a new setup implemented and commissioned at the SEXTANTS beamline of Synchrotron SOLEIL for absorption ...
Pietro Carrara, Franck Fortuna, Renaud Delaunay, Joan Vila-Comamala, Benedikt Rösner, Christian David, Stefania Pizzini, Clément Fourniols, Laurent Vila, Matteo Pancaldi, Carlo Spezzani, Flavio Capotondi, Pierre Nonnon, Mauro Fanciulli, Thierry Ruchon, Nicolas Jaouen, Horia Popescu, Maurizio Sacchi   +17 more
wiley   +1 more source

Effect of astigmatism and spherical equivalent correction on contrast sensitivity [PDF]

International Journal of Ophthalmology
AIM: To investigate the effect of astigmatism and spherical equivalent (SE) correction on contrast sensitivity (CS). METHODS: In this cross-sectional study, 103 visually normal subjects aged 18 to 36y with bilateral regular astigmatism in range of 1.00 ...
Maryam Saffarizadeh, Saeed Rahmani, Alireza Akbarzadeh Baghban, Mohammad Ghassemi-Broumand   +3 more
doaj   +1 more source

Ritchey-Chretien Telescope [PDF]

, 1973
A Ritchey-Chretien telescope is described which was designed to respond to images located off the optical axis by using two transparent flat plates positioned in the ray path of the image.
Amon, M., Rosin, S.
core   +1 more source

Primary Beam and Dish Surface Characterization at the Allen Telescope Array by Radio Holography

, 2011
The Allen Telescope Array (ATA) is a cm-wave interferometer in California, comprising 42 antenna elements with 6-m diameter dishes. We characterize the antenna optical accuracy using two-antenna interferometry and radio holography. The distortion of each
Ackermann, R. F., ATA GROUP, Atkinson, Shannon, Backer, D. C., Backus, P. R., Barott, William, Bauermeister, Amber, Blair, Samantha K., Blitz, Leo, Bock, D. C. -J., Bower, Geoffrey C., Bradford, Tucker, Cheng, Calvin, Croft, Steve, Davis, M. M., DeBoer, D. R., Dexter, Matt, Dreher, John, Engargiola, Greg, Fields, Ed, Forster, J. R., Gutierrez-Kraybill, Colby, Harp, G. R., Heiles, Carl, Helfer, Tamara, Jordan, Jane, Jorgensen, Susan, Keating, Garrett, Kilsdonk, Tom, Law, Casey, Lugten, John, MacMahon, D. H. E., McMahon, Peter, Milgrome, Oren, Nadler, Z. J., Pierson, Tom, Randall, Karen, Ross, John, Shostak, Seth, Siemion, Andrew, Smolek, Ken, Tarter, J. C., Thornton, Douglas, Urry, Lynn, Welch, W. J., Werthimer, Dan, Whysong, David, Williams, Peter K. G., Wright, M. C. H.   +48 more
core   +1 more source

Multifocal versus monofocal intraocular lenses after cataract extraction. [PDF]

, 2012
BACKGROUND: Good unaided distance visual acuity is now a realistic expectation following cataract surgery and intraocular lens (IOL) implantation. Near vision, however, still requires additional refractive power, usually in the form of reading glasses ...
Alio, Cillino, Maghraby, Allen, Haaskjold, Harman, Javitt, Javitt, Jusufovic, Kamlesh, Leyland, Nijkamp, Palmer, Percival, Rossetti, Sen, Steinert, Zhao, Alio, Alio, Allen, Cionni, Hayashi, Hayashi, Hayashi, Hayashi, Hida, Huang, Ji, Liang, Maxwell, Ortiz, Richter-Mueksch, Rocha, Shah, Souza, Liekfeld, Walkow, Xu, Zhang, Allen, Ang, Bailey, Desai, Desai, Desai, Gimbel, Glanville, Haaskjold, Higgins, Holladay, Javitt, Kirkham, Knorz, Lang, Legeais, Lindstrom, Riaz, Steinert, Leyland, Leyland   +60 more
core   +2 more sources

Corneal power modelling with OCT data – Thin and thick lens paraxial models versus raytracing

Acta Ophthalmologica, EarlyView.
Abstract Background Evaluating keratometric power with Zeiss index (PKZ), paraxial thick cornea power (Gullstrand [PG]) and power referenced to the front (PFV) and back vertex plane (PBV) and raytracing power (PR), and modelling the deviation from PKZ with a multivariable linear prediction model.
Achim Langenbucher, Nóra Szentmáry, Alan Cayless, Peter Hoffmann, Jascha Wendelstein   +4 more
wiley   +1 more source

Correlation Between Keratometric and Refractive Astigmatism in Pseudophakes

Clinical Ophthalmology, 2021
Shavini Athukorala,1 Neal Kansara,2 Erik Lehman,3 Seth M Pantanelli1 1Department of Ophthalmology, Penn State College of Medicine, Hershey, PA, USA; 2Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA; 3Department of Public Health ...
Athukorala S, Kansara N, Lehman E, Pantanelli SM   +3 more
doaj  

Astigmatic changes after Descemet membrane endothelial keratoplasty (DMEK) in decompensated penetrating keratoplasty grafts

Acta Ophthalmologica, EarlyView.
Abstract Purpose To evaluate the surgery‐induced changes of astigmatism after Descemet membrane endothelial keratoplasty (DMEK) in eyes with failed previous penetrating keratoplasty (PK). Design Retrospective, interventional cohort study based on prospective DMEK database.
Florian Thomas Steinberg, Jithmi Weliwitage, Marie von Berg, Silvia Schrittenlocher, Simona Schlereth, Claus Cursiefen, Björn Bachmann   +6 more
wiley   +1 more source

The use of WaveLight® Contoura to create a uniform cornea: the LYRA Protocol. Part 2: the consequences of treating astigmatism on an incorrect axis via excimer laser

Clinical Ophthalmology, 2017
Manoj Motwani Motwani LASIK Institute, San Diego, CA, USA Purpose: To show how an incorrect manifest astigmatism axis can cause an abnormal induced astigmatism on a new axis. Patients and methods: Four eyes of three patients were treated primarily with
Motwani M
doaj