Fresnel zone clearance - translation to russian
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  3. Fresnel zone clearance

Fresnel zone clearance - translation to russian

REGION OF SPACE BETWEEN A TRANSMITTING AND RECEIVING ANTENNA
Fresnal zone; Fresnel Zone
  • First Fresnel zone avoidance
  • Fresnel zone: ''D'' is the distance between the transmitter and the receiver; ''r'' is the radius of the first Fresnel zone (n=1) at point P. P is d1 away from the transmitter, and d2 away from the receiver.
  • Several examples of how Fresnel zones can be disrupted

Fresnel zone clearance      
чистота зоны Френеля
Fresnel zone clearance      

общая лексика

чистота зоны Френеля

fresnel         
  • Shadow cast by a 5.8{{nbsp}}mm-diameter obstacle on a screen 183{{nbsp}}cm behind, in sunlight passing through a pinhole 153{{nbsp}}cm in front. The faint colors of the fringes show the wavelength-dependence of the diffraction pattern. In the center is Poisson's{{hsp}}/Arago's spot.</div>
  • <div style="text-align: center;">André-Marie Ampère (1775–1836)</div>
  • <div style="text-align: center;">François Arago (1786–1853)</div>
  • perchet-2011}}
  • Airy diffraction pattern 65{{nbsp}}mm from a 0.09{{nbsp}}mm circular aperture illuminated by red laser light. Image size: 17.3{{nbsp}}mm{{tsp}}×{{tsp}}13{{nbsp}}mm
  • ''[[Musée national de la Marine]]''}}
  • Printed label seen through a doubly-refracting calcite crystal and a modern polarizing filter (rotated to show the different polarizations of the two images)
  • A right-handed/clockwise circularly polarized wave as defined from the point of view of the source. It would be considered left-handed/anti-clockwise circularly polarized if defined from the point of view of the receiver. If the rotating vector is resolved into horizontal and vertical components (not shown), these are a quarter-cycle out of phase with each other.
  • pharedeC}}
  • <div style="text-align: center;">Émile Verdet (1824–1866)</div>
  • <div style="text-align: center;">Étienne-Louis Malus (1775–1812)</div>
  • Close-up view of a thin plastic Fresnel lens
  • <div style="text-align: center;">Normalized Fresnel integrals <span style="color:#00b300;">''C''(''x'')</span>{{hsp}},{{tsp}}<span style="color:#b30000;">''S''(''x'')</span></div>
  • Fresnel's double mirror (1816). The mirror segments ''M''<sub>1</sub> and ''M''<sub>2</sub> produce virtual images ''S''<sub>1</sub> and ''S''<sub>2</sub> of the slit ''S''. In the shaded region, the beams from the two virtual images overlap and interfere in the manner of Young (above).
  • biconvex]].<ref name=levitt-p59>Levitt, 2013, p.&nbsp;59.</ref>)
  • Cross-section of a first-generation Fresnel lighthouse lens, with sloping mirrors&nbsp;''m,{{hsp}}n'' above and below the refractive panel&nbsp;''RC'' (with central segment&nbsp;''A''). If the cross-section in every vertical plane through the lamp&nbsp;''L'' is the same, the light is spread evenly around the horizon.
  • Cross-section of a Fresnel rhomb (blue) with graphs showing the ''p'' component of vibration (''parallel'' to the ''plane'' of incidence) on the vertical axis, vs. the ''s'' component (''square'' to the plane of incidence and parallel to the ''surface'') on the horizontal axis. If the incoming light is ''linearly'' polarized, the two components are in phase (top&nbsp;graph). After one reflection at the appropriate angle, the ''p'' component is advanced by 1/8 of a cycle relative to the ''s'' component (middle&nbsp;graph). After two such reflections, the phase difference is 1/4 of a cycle (bottom&nbsp;graph), so that the polarization is ''elliptical'' with axes in the ''s''&nbsp;and&nbsp;''p'' directions. If the ''s''&nbsp;and&nbsp;''p'' components were initially of equal magnitude, the initial polarization (top&nbsp;graph) would be at 45° to the plane of incidence, and the final polarization (bottom&nbsp;graph) would be ''circular''.
  • <div style="text-align: center;">Diffraction fringes near the limit of the geometric shadow of a straight edge. Light intensities were calculated from the values of the normalized integrals <span style="color:#00b300;">''C''(''x'')</span>{{hsp}},{{tsp}}<span style="color:#b30000;">''S''(''x'')</span></div>
  • Altered colors of skylight reflected in a soap bubble, due to ''[[thin-film interference]]'' (formerly called "thin-plate" interference)
  • martan-2014}}
  • First-order rotating catadioptric Fresnel lens, dated 1870, displayed at the ''[[Musée national de la Marine]]'', Paris. In this case the dioptric prisms (inside the bronze rings) and catadioptric prisms (outside) are arranged to give a purely flashing light with four flashes per rotation. The assembly stands 2.54 metres tall and weighs about 1.5 tonnes.
  • Chromatic polarization in a plastic [[protractor]], caused by stress-induced birefringence.
  • Fresnel's grave at Père Lachaise Cemetery, Paris, photographed in 2018
  • Ordinary refraction from a medium of higher wave velocity to a medium of lower wave velocity, as understood by Huygens. Successive positions of the [[wavefront]] are shown in blue before refraction, and in green after refraction. For ''ordinary'' refraction, the secondary wavefronts (gray curves) are spherical, so that the rays (straight gray lines) are perpendicular to the wavefronts.
  • <div style="text-align: center;">Siméon Denis Poisson (1781–1840)</div>
  • <div style="text-align: center;">Jean-Baptiste Biot (1774–1862)</div>
  • <div style="text-align: center;">Thomas Young (1773–1829)</div>
  • Replica of Young's two-source interference diagram (1807), with sources ''A'' and ''B'' producing minima at ''C'', ''D'', ''E'', and ''F''<ref>Cf. Young, 1807, vol.&nbsp;1, p.&nbsp;777 & Fig.&nbsp;267.</ref>
FRENCH ENGINEER AND PHYSICIST (1788-1827)
Augustin Fresnel; Fresnel; Jean-Augustin Fresnel; Augustin Jean Fresnel; Augustine Jean Fresnel; Jean Augustin Fresnel; Conical refraction

[fre'nel]

существительное

физика

френель (единица частоты)

Definition

ЧАСОВЫЕ ПОЯСА
см. Поясное время.
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Wikipedia

Fresnel zone

A Fresnel zone (English: fray-NEL), named after physicist Augustin-Jean Fresnel, is one of a series of confocal prolate ellipsoidal regions of space between and around a transmitter and a receiver. The primary wave will travel in a relative straight line from the transmitter to the receiver. Aberrant transmitted radio, sound, or light waves which are transmitted at the same time can follow slightly different paths before reaching a receiver, especially if there are obstructions or deflecting objects between the two. The two waves can arrive at the receiver at slightly different times and the aberrant wave may arrive out of phase with the primary wave due to the different path lengths. Depending on the magnitude of the phase difference between the two waves, the waves can interfere constructively or destructively. The size of the calculated Fresnel zone at any particular distance from the transmitter and receiver can help to predict whether obstructions or discontinuities along the path will cause significant interference.

https://en.wikipedia.org/wiki/Fresnel zone
What is the Russian for Fresnel zone clearance? Translation of &#39Fresnel zone clearance&#39 to Rus
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