نتایج جستجو برای: optical resolving power

تعداد نتایج: 755599  

2002
C.J.R. Lord

Lord Rayleigh’s investigations into the performance of optical systems led to the classic resolution formula based upon the complete separation of two Airy discs.1 This was refined shortly afterwards by the observational empirical law formulated by the Rev. William Rutter Dawes of Ormskirk.2 Both firmly established that the resolving power of a diffraction limited telescope was solely dependent...

Journal: :The Review of scientific instruments 2011
Philip Heimann Oleg Krupin William F Schlotter Joshua Turner Jacek Krzywinski Florian Sorgenfrei Marc Messerschmidt David Bernstein Jaromir Chalupský Vera Hájková Stefan Hau-Riege Michael Holmes Libor Juha Nicholas Kelez Jan Lüning Dennis Nordlund Monica Fernandez Perea Andreas Scherz Regina Soufli Wilfried Wurth Michael Rowen

We present the x-ray optical design of the soft x-ray materials science instrument at the Linac Coherent Light Source, consisting of a varied line-spaced grating monochromator and Kirkpatrick-Baez refocusing optics. Results from the commissioning of the monochromator are shown. A resolving power of 3000 was achieved, which is within a factor of two of the design goal.

Journal: :The British journal of ophthalmology 2001
T Oshika Y Shiokawa S Amano K Mitomo

AIMS To assess the influence of glistenings on the optical quality of acrylic foldable intraocular lens. METHODS Several degrees of glistenings in the optic were experimentally created by immersing the lens in water at 37 degrees C for 48 hours and then at 25 degrees C for 24 hours. Optical bench tests were carried out in water including measurements of spectral transmittance with the spectro...

Journal: :Optics express 2012
Changbao Ma Zhaowei Liu

Optical lenses are pervasive in various areas of sciences and technologies. It is well known that conventional lenses have symmetrical imaging properties along forward and backward directions. In this letter, we show that hyperbolic plasmonic metamaterial based negative refraction lenses perform as either converging lenses or diverging lenses depending on the illumination directions. New imagin...

Journal: :Microscopy Today 2000

2017
Sanathanan S. Muttikulangara Maciej Baranski Shakil Rehman Liangxing Hu Jianmin Miao

Diffraction gratings are among the most commonly used optical elements in applications ranging from spectroscopy and metrology to lasers. Numerous methods have been adopted for the fabrication of gratings, including microelectromechanical system (MEMS) fabrication which is by now mature and presents opportunities for tunable gratings through inclusion of an actuation mechanism. We have designed...

Journal: :The Review of scientific instruments 2010
S Zabler T Rack A Rack K Nelson

Quantitative investigation of micrometer and submicrometer gaps between joining metal surfaces is applied to conical plug-socket connections in dental titanium implants. Microgaps of widths well beyond the resolving power of industrial x-ray systems are imaged by synchrotron phase contrast radiography. Furthermore, by using an analytical model for the relatively simple sample geometry and apply...

Journal: :journal of artificial intelligence in electrical engineering 2013
reza ghavidel barsary alireza andalib hamed alipour-banaei

here, we propose an optical filter and an optical power splitter based on two-dimensionalphotonic crystal all circular ring resonators. these structures are made of a square lattice ofsilicon rods with the refractive index n1=3.464 surrounded by air (with refractive indexn2=1). first, we have designed the filter and by using that, we designed a power splitter. thetransmission efficiency and qua...

Journal: :Nano letters 2008
Guoxin Rong Hongyun Wang Lynell R Skewis Björn M Reinhard

We use plasmon coupling between individual gold nanoparticle labels to monitor subdiffraction limit distances in live cell nanoparticle tracking experiments. While the resolving power of our optical microscope is limited to approximately 500 nm, we improve this by more than an order of magnitude by detecting plasmon coupling between individual gold nanoparticle labels using a ratiometric detect...

Journal: :Current opinion in structural biology 1999
M G Gustafsson

Fluorescence microscopy is an essential tool of modern biology, but, like all forms of optical imaging, it is subject to physical limits on its resolving power. In recent years, several exciting techniques have been introduced to exceed these limits, including standing wave microscopy, 4Pi confocal microscopy, I5M and structured illumination microscopy. Several such techniques have been definit...

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