from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A combination of lenses made of different glass, used to produce images free of chromatic aberrations.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun optics A
lensgenerally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberrationproduced by one is corrected by the other.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a compound lens system that forms an image free from chromatic aberration
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