Fresnel lens

Fresnel lens
Fres·nel lens (fra-nelґ) [Augustin Jean Fresnel, French physicist and engineer, 1788–1827] see under lens.

Medical dictionary. 2011.

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  • Fresnel lens — Lens Lens (l[e^]nz), n.; pl. {Lenses} ( [e^]z). [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. {Lentil}.] (Opt.) A piece of glass, or other transparent substance, ground with two… …   The Collaborative International Dictionary of English

  • Fresnel lens — Fres nel lens [See {Fresnel lamp}.] (Optics) See under {Lens}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Fresnel lens — n. [after FRESNEL Augustin Jean] a thin optical lens of many concentric rings, having the properties of a much thicker and heavier lens: used in cameras, lighthouse beacons, etc …   English World dictionary

  • Fresnel lens — A Fresnel lens (pronounced [ frɛz.nəl] or [freɪ nɛl] ) is a type of lens invented by French physicist Augustin Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large aperture and short focal… …   Wikipedia

  • Fresnel lens — Optics. a large lens with a surface of concentric grooves of prismatic profile, used in automobile headlights, searchlights, spotlights, etc. [1840 50; see FRESNEL] * * * Series of concentric rings, each consisting of a thin part of a simple lens …   Universalium

  • Fresnel lens — noun lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length • Hypernyms: ↑lens, ↑lense, ↑lens system • Part Holonyms: ↑headlight, ↑headlamp, ↑searchlight * * * …   Useful english dictionary

  • Fresnel lens — noun Etymology: Augustin J. Fresnel Date: 1865 a lens that has a surface consisting of a concentric series of simple lens sections so that a thin lens with a short focal length and large diameter is possible and that is used especially for… …   New Collegiate Dictionary

  • Fresnel lens — /frənɛl ˈlɛns/ (say fruhnel lens) noun a large lens with a short focal length, used in headlights, spotlights, etc. {See Fresnel diffraction} …  

  • fresnel lens — [freɪ nɛl] noun Photography a flat lens made of a number of concentric rings, to reduce spherical aberration. Origin C19: named after the French physicist and civil engineer Augustin J. Fresnel …   English new terms dictionary

  • fresnel lens — F/A/V a flat glass or acrylic lens in which the curvature of a normal lens surface has been collapsed in such a way that concentric circles are impressed on the lens surface; often used for the condenser lens in overhead projectors, in rear… …   Audio and video glossary

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