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APL Dictionary Terms
triple aplanat
A compound lens consisting of two negative lenses of flint glass. A double-convex lens of crown glass is cemented between...
edge enhancement
In image processing, any operation that strengthens information about the edges of objects displayed. Three types of spatial...
aplanatic points
Aplanatic points refer to specific points in an optical system where certain aberrations, such as spherical aberration or...
tissue welding
The use of a surgical laser instead of sutures or staples to close a wound or rejoin severed blood vessels.
aplanat
Also known as aplanatic lens. A lens corrected for spherical aberration and coma.
cartesian lens
A lens, one surface being a cartesian oval, that produces an aplanatic condition.
Vegard-Kaplan bands
The bands found by Vegard in the spectrum of the aurora borealis and by Kaplan in the nitrogen afterglow. They are formed by...
aplanatic lens system
A system that satisfies the Abbe sine condition, and is free from spherical aberration and coma.
aplanatic surface
An aplanatic surface is an optical surface that is specifically designed or shaped to minimize spherical aberration and...
Laplacian edge enhancement
Edge enhancement technique that accentuates all edge details in an image without discriminating as to spatial orientation.
(10 results found)
April 2024
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