Definition of fresnel in English:

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Pronunciation: /freɪˈnɛl/
(also fresnel lens)


A flat lens made of a number of concentric rings, to reduce spherical aberration.
Example sentences
  • The diameter of the hole is equal to the diameter of the largest complete circle on your fresnel lens.
  • These were made for use in rear screen projection TV sets in conjunction with our fresnel lenses.
  • Wiko replacement fresnel lenses have long been known for their superior quality.


Mid 19th century: named after A. J. Fresnel (see Fresnel, Augustin Jean).

For editors and proofreaders

Line breaks: fres|nel

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