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Numerical aperture

Known as: Numerical aperture (microscopy), Numerical aperture (optical fiber), Na 
In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system… 
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Related topics

Related topics

21 relations
Atomic-force microscopyBlu-rayCladding (fiber optics)Computational lithography

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
Highly Cited
2017
Highly Cited
2017
HALL, Stuart. A identidade cultural na pós-modernidade. Tradução Tomaz Tadeu da Silva e Guacira Lopes Louro. 12. ed. Rio de Janeiro: Lamparina, 2015.
Highly Cited
2010
Highly Cited
2010
DETAILED ABUNDANCES OF RED GIANTS IN THE GLOBULAR CLUSTER NGC 1851: C+N+O AND THE ORIGIN OF MULTIPLE POPULATIONS
We present chemical abundance analysis of a sample of 15 red giant branch (RGB) stars of the globular cluster NGC 1851… 
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…
Highly Cited
1999
Highly Cited
1999
Trophic Mass-Balance Model of Alaska's Prince William Sound Ecosystem, for the Post-Spill Period 1994-1996
Information about the ecological components of Alaska's Prince William Sound (PWS) has increased considerably since the 1989… 
Highly Cited
1985
Highly Cited
1985
Adrenalin-induced Na+/H+ exchange in trout erythrocytes and its effects upon oxygen-carrying capacity
Addition of adrenalin (10 −4 moll −1 ) to trout erythrocytes in an unbuffered saline resulted in a rapid acidification of the… 
Highly Cited
1981
Highly Cited
1981
Reaction time, evoked brain potentials, and psychometric g in the severely retarded
Review
1980
Review
1980
The effects of cattle pasture on soil fertility in the Brazilian Amazon: consequences for beef production sustainability.
Amazon rainforest is fast being replaced by cattle pastures as investors respond to financial incentives and the lure of new… 
Highly Cited
1980
Highly Cited
1980
Multifrequency Imaging of Radar Turntable Data
In recent years synthetic-aperture radars (SAR) have proven to be very useful two-dimensional imaging tools in various fields… 
Review
1976
Review
1976
Analytical precision of one-sixth order semiquantitative spectrographic analysis
Over 2,700 separate analyses were made on 22 different geologic samples selected to cover wide concentration ranges for the 30… 
Highly Cited
1962
Highly Cited
1962
Capitalismo e escravidão no Brasil meridional : o negro na sociedade escravocrata do Rio Grande do Sul
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