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- Fresnel_rhomb abstract "A Fresnel rhomb is a prism designed in 1817 by Augustin-Jean Fresnel for converting linearly polarized light into circularly polarized light. While the device performs the same function as a quarter wave plate, the rhomb does not depend on a material's birefringence. Rather, the relative phase shift between the s and p polarizations is a result of total internal reflection, two of which each contribute a nominal retardance of 45°. This achieves a wide spectral bandwidth, which is difficult using birefringent waveplates. The precision of the 90° phase shift is compromised only due to changes in the refractive index of the material due to dispersion; this change can be very small over a wide spectral range. The material (typically glass) is itself specifically not birefringent.The dimensions of the rhomb (usually a parallelepiped) are such that light entering one of the small faces undergoes two internal reflections, as seen in the figure, before exiting through the other small face. The angle of each internal reflection is designed to produce a 45° (π/4 radians) phase delay between the two linearly polarized components of the light. Hence a linearly polarized beam at 45° becomes elliptically polarized after the first reflection, but emerges as circularly polarized after the second reflection. For other input polarizations, the net effect of the rhomb is identical to that of a quarter wave plate. Two Fresnel rhombs can be used in tandem (usually cemented to avoid reflections at their interface) in order to achieve the function of a halfwave plate. The latter arrangement, unlike a single Fresnel rhomb used as a quarter-wave retarder, has the additional feature that the exiting beam can be collinear with the original incident beam.The exact angle for a Fresnel rhomb to achieve the intended 90° relative phase shift depends on the material's refractive index. For example, using a glass whose refractive index n = 1.5, an internal reflection angle of incidence of either 50.2° or 53.3° meets that condition.".
- Fresnel_rhomb thumbnail Fresnel_rhomb.svg?width=300.
- Fresnel_rhomb wikiPageExternalLink Fresnels_Rhomb.html.
- Fresnel_rhomb wikiPageID "8323351".
- Fresnel_rhomb wikiPageLength "3445".
- Fresnel_rhomb wikiPageOutDegree "26".
- Fresnel_rhomb wikiPageRevisionID "697629480".
- Fresnel_rhomb wikiPageWikiLink Augustin-Jean_Fresnel.
- Fresnel_rhomb wikiPageWikiLink Birefringence.
- Fresnel_rhomb wikiPageWikiLink Category:Polarization_(waves).
- Fresnel_rhomb wikiPageWikiLink Circular_polarization.
- Fresnel_rhomb wikiPageWikiLink Dispersion_(optics).
- Fresnel_rhomb wikiPageWikiLink Fresnel_equations.
- Fresnel_rhomb wikiPageWikiLink Parallelepiped.
- Fresnel_rhomb wikiPageWikiLink Phase_(waves).
- Fresnel_rhomb wikiPageWikiLink Polarization_(waves).
- Fresnel_rhomb wikiPageWikiLink Polarization_rotator.
- Fresnel_rhomb wikiPageWikiLink Prism.
- Fresnel_rhomb wikiPageWikiLink Radian.
- Fresnel_rhomb wikiPageWikiLink Refractive_index.
- Fresnel_rhomb wikiPageWikiLink Rhombus.
- Fresnel_rhomb wikiPageWikiLink Total_internal_reflection.
- Fresnel_rhomb wikiPageWikiLink Waveplate.
- Fresnel_rhomb wikiPageWikiLink File:Fresnel_rhomb.svg.
- Fresnel_rhomb wikiPageWikiLinkText "Fresnel rhomb".
- Fresnel_rhomb wikiPageUsesTemplate Template:Reflist.
- Fresnel_rhomb subject Category:Polarization_(waves).
- Fresnel_rhomb hypernym Prism.
- Fresnel_rhomb type Astrophysic.
- Fresnel_rhomb type Redirect.
- Fresnel_rhomb comment "A Fresnel rhomb is a prism designed in 1817 by Augustin-Jean Fresnel for converting linearly polarized light into circularly polarized light. While the device performs the same function as a quarter wave plate, the rhomb does not depend on a material's birefringence. Rather, the relative phase shift between the s and p polarizations is a result of total internal reflection, two of which each contribute a nominal retardance of 45°.".
- Fresnel_rhomb label "Fresnel rhomb".
- Fresnel_rhomb sameAs Q1389082.
- Fresnel_rhomb sameAs Fresnelsches_Parallelepiped.
- Fresnel_rhomb sameAs Paralelepipedo_de_Fresnel.
- Fresnel_rhomb sameAs m.026_drl.
- Fresnel_rhomb sameAs Параллелепипед_Френеля.
- Fresnel_rhomb sameAs Q1389082.
- Fresnel_rhomb wasDerivedFrom Fresnel_rhomb?oldid=697629480.
- Fresnel_rhomb depiction Fresnel_rhomb.svg.
- Fresnel_rhomb isPrimaryTopicOf Fresnel_rhomb.
