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Webster's New World College Dictionary » Fresnel lens
Fresnel lens
Fresnel lens definition
Fresnel lens
a thin optical lens of many concentric rings, having the properties of a much thicker and heavier lens: used in cameras, lighthouse beacons, etc.
Etymology: after Augustin Jean Fresnel
Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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