A Fresnel lens (/ f r eɪ ˈ n ɛ l / fray-NEL or / ˈ f r ɛ z n əl / FREZ-nel) is a type of lens originally developed by French physicist Augustin-Jean Fresnel for lighthouses.

The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. Compared to conventional bulky lenses, the Fresnel lens is much thinner, larger, and flatter, and captures more oblique light from a light source, thus allowing lighthouses to be visible over much greater distances.

Verb

magnify (third-person singular simple present magnifies, present participle magnifying, simple past and past participle magnified)

1. (transitive) To praise, glorify (someone or something, especially god). [from 14th c.]
   • 1526, William Tyndale, trans. Bible, Acts X:

     For they herde them speake with tonges, and magnify God.

   • 1644, John Milton, Aeropagitica:

     For he who freely magnifies what hath been nobly done, and fears not to declare as freely what might be done better, gives ye the best cov'nant of his fidelity [...].

2. (transitive) To make (something) larger or more important. [from 14th c.]
3. (transitive) To make (someone or something) appear greater or more important than it is; to intensify, exaggerate. [from 17th c.]
4. (transitive) To make (something) appear larger by means of a lens, magnifying glass, telescope etc. [from 17th c.]

Derived terms

• magnifier
• magnifying glass
• magnification

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• Business: Healthcare: Products and Services: Disability: Vision and Reading Aids (17)
• Computers: E-Books: Readers (65)
• Health: Conditions and Diseases: Eye Disorders: Low Vision (13)
• Shopping: Publications: Books: Braille (2)

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• Christal Vision
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  Low vision products for the visually impaired.