Skip to search form
Skip to main content
Skip to account menu
Semantic Scholar
Semantic Scholar's Logo
Search 233,241,969 papers from all fields of science
Search
Sign In
Create Free Account
Numerical aperture
Known as:
Numerical aperture (microscopy)
, Numerical aperture (optical fiber)
, Na
Expand
In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system…
Expand
Wikipedia
(opens in a new tab)
Create Alert
Alert
Related topics
Related topics
21 relations
Atomic-force microscopy
Blu-ray
Cladding (fiber optics)
Computational lithography
Expand
Papers overview
Semantic Scholar uses AI to extract papers important to this topic.
Highly Cited
2010
Highly Cited
2010
Taschenbuch der Physik
A. Krupski
,
Danuta Serwotka
,
A. Wojtowicz
,
H. Stöcker
2010
Corpus ID: 181154694
Unverzichtbare Kenntnisse der Physik! Schnellen Zugriff auf die erforderlichen Informationen Prufungen und wertvolle…
Expand
Highly Cited
2008
Highly Cited
2008
Pomiary oświetleniowe we wnętrzach : Nowe podejście w projektowaniu i weryfikacji oświetlenia na tle normy PN-EN 12464-1:2004 Światło i oświetlenie. Oświetlenie miejsc pracy. Cz. 1: Miejsca pracy we…
W. Pabjańczyk
2008
Corpus ID: 180161182
Highly Cited
2008
Highly Cited
2008
Comparison of bi-directional relaying protocols
Sang Joon Kim
,
N. Devroye
,
P. Mitran
,
V. Tarokh
IEEE Sarnoff Symposium
2008
Corpus ID: 14409609
In a bi-directional relay channel, two nodes wish to exchange independent messages over a shared wireless channel with the help…
Expand
Highly Cited
2003
Highly Cited
2003
Exfoliated PP/Clay Nanocomposites Using Ammonium-Terminated PP as the Organic Modification for Montmorillonite
Z. M. Wang
,
H. Nakajima
,
E. Manias
,
T. Chung
2003
Corpus ID: 95529697
Although the miscibility of silicates, including clay minerals, with organics and polymers has been known since the early 1950s…
Expand
Highly Cited
2003
Highly Cited
2003
Electroanalytical determination of 4-nitrophenol by square wave voltammetry on diamond electrodes
V. Pedrosa
,
L. Codognoto
,
L. Avaca
2003
Corpus ID: 44986439
The anodic voltammetric behavior of 4-Nitrophenol on a Boron-doped diamond electrode in aqueous solution has been studied using…
Expand
Highly Cited
2000
Highly Cited
2000
Near-Infrared Spectral Variations of Martian Surface Materials from ISM Imaging Spectrometer Data
Scott Murchie
,
Scott Murchie
,
S. Erard
2000
Corpus ID: 6063196
Abstract Imaging spectrometer data from the ISM instrument on Phobos 2 were used to characterize spatial variations in near…
Expand
Highly Cited
2000
Highly Cited
2000
Crime and Mentalities in Early Modern England
M. Gaskill
2000
Corpus ID: 143208177
Crime and law have now been studied by historians of early modern England for more than a generation. Crime and Mentalities in…
Expand
Review
1980
Review
1980
The effects of cattle pasture on soil fertility in the Brazilian Amazon: consequences for beef production sustainability.
P. Fearnside
1980
Corpus ID: 55328539
Amazon rainforest is fast being replaced by cattle pastures as investors respond to financial incentives and the lure of new…
Expand
Review
1976
Review
1976
Analytical precision of one-sixth order semiquantitative spectrographic analysis
By J. M. Motooka
,
D. Grimes
1976
Corpus ID: 129816700
Over 2,700 separate analyses were made on 22 different geologic samples selected to cover wide concentration ranges for the 30…
Expand
Highly Cited
1976
Highly Cited
1976
Study of the structure of molecular complexes
E. Clementi
,
R. Barsotti
,
J. Fromm
,
R. Watts
1976
Corpus ID: 54877045
A cluster of 200 molecules of water containing one of the LiF, LiCl, NaF, NaCl, KF or KCl ion pairs has been studied at the…
Expand
By clicking accept or continuing to use the site, you agree to the terms outlined in our
Privacy Policy
(opens in a new tab)
,
Terms of Service
(opens in a new tab)
, and
Dataset License
(opens in a new tab)
ACCEPT & CONTINUE