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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
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
2003
Highly Cited
2003
Exfoliated PP/Clay Nanocomposites Using Ammonium-Terminated PP as the Organic Modification for Montmorillonite
Although the miscibility of silicates, including clay minerals, with organics and polymers has been known since the early 1950s… 
Highly Cited
2003
Highly Cited
2003
Melt-Processable Syndiotactic Polystyrene/Montmorillonite Nanocomposites
Monoalkyl- and dialkyl-imidazolium surfactants were used to prepare organ- ically modified montmorillonites with markedly… 
Highly Cited
2002
Highly Cited
2002
Preparation and characterization of polystyrene–clay nanocomposites by free‐radical polymerization
The polymerizable cationic surfactant, vinylbenzyldimethylethanolammouium chloride (VBDEAC), was synthesized to functionalize… 
Review
2001
Review
2001
Trypanocidal Activity of Isolated Naphthoquinones from Tabebuia and Some Heterocyclic Derivatives: A Review from an Interdisciplinary Study
Naphthoquinones isolated from the wood of trees of the families Bignoniaceae and Verbenaceae have been subjected to an… 
Highly Cited
2001
Highly Cited
2001
Density functional study of guanine and uracil quartets and of guanine quartet/metal ion complexes
The structures and interaction energies of guanine and uracil quartets have been determined by B3LYP hybrid density‐functional… 
Highly Cited
1988
Highly Cited
1988
Modified Clays for the Adsorption of Environmental Toxicants: Binding of Chlorophenols to Pillared, Delaminated, and Hydroxy-Interlayered Smectites
Due to their unique polarity, pore-size distribution, and high surface areas, pillared and delaminated clays are potentially… 
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
1980
Highly Cited
1980
Structure and electrical resistivities of liquid binary alloys
Extends the self-consistent energy-independent model pseudopotential theory, developed previously for the binary allows of simple… 
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… 
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