Fresnel (disambiguation)
Encyclopedia
Fresnel commonly refers to physicist Augustin-Jean Fresnel
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Fresnel may also refer to:
Augustin-Jean Fresnel
Augustin-Jean Fresnel , was a French engineer who contributed significantly to the establishment of the theory of wave optics. Fresnel studied the behaviour of light both theoretically and experimentally....
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Fresnel may also refer to:
- Fulgence FresnelFulgence FresnelFulgence Fresnel was a French Orientalist who was a native of Mathieu, Calvados. He was brother to physicist Augustin Fresnel ....
(1795 – 1855), a French Orientalist and brother of Augustin-Jean Fresnel - Fresnel equationsFresnel equationsThe Fresnel equations , deduced by Augustin-Jean Fresnel , describe the behaviour of light when moving between media of differing refractive indices...
, describing light reflection and refraction - Huygens-Fresnel principleHuygens-Fresnel principleThe Huygens–Fresnel principle is a method of analysis applied to problems of wave propagation both in the far-field limit and in near-field diffraction.-History:...
, a description of wave propagation - Fresnel diffractionFresnel diffractionIn optics, the Fresnel diffraction equation for near-field diffraction, is an approximation of Kirchhoff-Fresnel diffraction that can be applied to the propagation of waves in the near field....
(or Fresnel pattern), describing wave propagation through an aperture- Fresnel integralFresnel integral250px|thumb|S and C The maximum of C is about 0.977451424. If πt²/2 were used instead of t², then the image would be scaled vertically and horizontally ....
, functions related to Fresnel diffraction - Fresnel numberFresnel numberThe Fresnel number F, named after the physicist Augustin-Jean Fresnel, is a dimensionless number occurring in optics, in particular in diffraction theory....
, a dimensionless parameter in diffraction theory - Fresnel zoneFresnel zoneIn optics and radio communications , a Fresnel zone , named for physicist Augustin-Jean Fresnel, is one of a number of concentric ellipsoids which define volumes in the radiation pattern of a circular aperture...
, a pattern of radiation resulting from Fresnel diffraction - Fresnel zone plateZone plateA zone plate is a device used to focus light or other things exhibiting wave character. Unlike lenses or curved mirrors however, zone plates use diffraction instead of refraction or reflection. Based on analysis by Augustin-Jean Fresnel, they are sometimes called Fresnel zone plates in his honor...
, a plate which focuses light by Fresnel diffraction- Fresnel imagerFresnel ImagerA Fresnel imager is a proposed ultra-lightweight design for a space telescope that uses a Fresnel array as primary optics instead of a typical lens. It focuses light with a thin opaque foil sheet punched with specially shaped holes, thus focusing light on a certain point by using the phenomenon of...
, a proposed design for a space telescope that uses Fresnel zone plates
- Fresnel imager
- Fresnel diffraction mirrorRidged mirrorIn atomic physics, a ridged mirror is a kind of atomic mirror, designed for the specular reflection of neutral particles coming at the grazing incidence angle, characterised in the following: in order to reduce the mean attraction of particles to the surface and increase the reflectivity, this...
, an atomic mirror utilizing Fresnel diffraction
- Fresnel integral
- Fresnel lensFresnel lensA Fresnel lens 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...
, an efficient lens originally developed for lighthouses- Hyperradiant Fresnel lensHyperradiant Fresnel lensHyper-radial or hyperradiant Fresnel lenses are Fresnel lenses larger than "first order" lenses. They have a focal length of 1330 mm. The idea was mentioned by Thomas Stevenson in 1869 and first proposed by John Richardson Wigham in 1872, and again proposed by Thomas Stevenson in 1885.The...
, a now-obsolete very large Fresnel lens - Fresnel lanternFresnel lanternA Fresnel lantern is a common lantern used in theatre, which employs a Fresnel lens to wash light over an area of the stage. The lens produces a wider, soft-edged beam of light, which is commonly used for back light and top light....
, a theatre spotlight incorporating a Fresnel lens
- Hyperradiant Fresnel lens
- Fresnel rhombFresnel rhombA Fresnel rhomb is a prism-like device designed in 1817 by Augustin-Jean Fresnel for changing the polarization of light waves to be circularly polarized. Though the result is similar to that of using a wave plate, the rhomb does not depend on birefringent properties of the material...
, a plate that circularly polarizes light - Fresnel (unit of frequency), a formerly-used unit equal to one terahertz.
- Fresnel drag coefficientAether drag hypothesisIn the 19th century, the theory of the luminiferous aether as the hypothetical medium for the propagation of light was widely discussed. An important part of this discussion was the question concerning the state of motion of Earth with respect to this medium. The aether drag hypothesis dealt with...
, a parameter used in early attempts to explain the constant speed of light - Rimae FresnelRimae FresnelRimae Fresnel is a 90km-long arcurate escarpment on the Moon at . Both the escarpment and the nearby Promontorium Fresnel were named after the mathematician Augustin Jean Fresnel....
, an escarpment on the moon