Definition of Fresnel lens. Meaning of Fresnel lens. Synonyms of Fresnel lens

Here you will find one or more explanations in English for the word Fresnel lens. Also in the bottom left of the page several parts of wikipedia pages related to the word Fresnel lens and, of course, Fresnel lens synonyms and on the right images related to the word Fresnel lens.

Definition of Fresnel lens

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 opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure. Lenses Note: Of spherical lenses, there are six varieties, as shown in section in the figures herewith given: viz., a plano-concave; b double-concave; c plano-convex; d double-convex; e converging concavo-convex, or converging meniscus; f diverging concavo-convex, or diverging meniscus. Crossed lens (Opt.), a double-convex lens with one radius equal to six times the other. Crystalline lens. (Anat.) See Eye. Fresnel lens (Opt.), a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; -- so called from the inventor. Multiplying lens or glass (Opt.), a lens one side of which is plane and the other convex, but made up of a number of plane faces inclined to one another, each of which presents a separate image of the object viewed through it, so that the object is, as it were, multiplied. Polyzonal lens. See Polyzonal.
Fresnel lens
Fresnel lens Fres`nel" lens" [See Fresnel lamp.] (Optics) See under Lens.

Meaning of Fresnel lens from wikipedia

- A Fresnel lens (/ˈfreɪn-, ˈfrɛn.ɛl, -əl/ FRAYN-, FREN-el, -⁠əl, /freɪˈnɛl/ fray-NEL or /ˈfrɛznəl/ FREZ-nəl) is a type of composite compact lens originally...
- Fresnel–Arago laws Fresnel equations Fresnel imager Fresnel integral Fresnel lantern Fresnel lens Fresnel number Fresnel rhomb Fresnel zone Fresnel zone...
- Hyper-radial or hyperradiant Fresnel lenses are Fresnel lenses used in lighthouses. They are larger than "first-order" lenses, having a focal length (radius)...
- A Fresnel lantern (pronounced frəˈnɛl or fruh-nel) is a common lantern used in theatre, which employs a Fresnel lens to wash light over an area of the...
- Unlike lenses or curved mirrors however, zone plates use diffraction instead of refraction or reflection. Based on analysis by Augustin-Jean Fresnel, they...
- the system. The Improved Fresnel Lens Optical Landing System, IFLOLS, uses a fiber optic "source" light, projected through lenses to present a sharper, crisper...
- concentric ring-shaped lenses, such that the combination acts as a single lens but is much thinner. This arrangement is known as a Fresnel lens. The magnifying...
- the choice of light sources, mountings, reflector design, the use of Fresnel lenses, and in rotation and shuttering systems providing lighthouses with individual...
- science fiction author Gregory Benford calculated that a concave rotating Fresnel lens 1000 kilometres across, yet only a few millimeters thick, floating in...
- lenses. A Fresnel lens has its optical surface broken up into narrow rings, allowing the lens to be much thinner and lighter than conventional lenses...
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