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- Lyot_filter abstract "A Lyot filter, named for its inventor Bernard Lyot, is a type of optical filter that uses birefringence to produce a narrow passband of transmitted wavelengths. Lyot filters are often used in astronomy, particularly for solar astronomy.A Lyot filter is made from one or more birefringent plates (usually quartz), with (in multi-plate filters) each plate being half the thickness of the previous one. Because the plates are birefringent, the ordinary and extraordinary polarization components of a light beam experience a different refractive index and thus have a different phase velocity. Therefore, the polarization state of light with an arbitrary wavelength will in general be modified after a passage through the filter plate, and this causes a loss of optical power in a subsequent polarizer. For certain wavelengths, however, the optical path length difference is an integer multiple of the wavelength, so that the losses are very small. By rotating the plates, one can shift the wavelengths of the transmission peaks. Each stage of a Lyot filter is 1/2 the size of the preceding stage. The largest stage sets the bandwidth and the smallest stage sets the Free Spectral Range. If you use two of the second largest crystals it will increase the contrast of the desired line. If you split the crystals in half and add a 1/2 waveplates in the middle you can increase the field of view of the filter. The separation and narrowness of the transmission peaks depends on the number, thicknesses, and orientation of the plates.If electrically tunable birefringent elements are inserted (liquid crystal or electrooptic), then we obtain an \"Electrically Tunable Lyot Filter\". Liquid crystal tunable filters allow analogue tuning of the transmitted wavelength by carefully adjusting the voltage over the liquid crystal cells. Often these filters are based on the original Lyot design, but many other designs exist in order to achieve either narrow or broad band transmission, polarization selectivity, etc.Single and multi-plate Lyot filters are often used inside the optical cavity of lasers to allow tuning of the laser. In this case, Brewster losses from the plate and other intracavity elements are usually sufficient to produce the polarizing effect and no additional polarizers are required. Although their mechanisms are different, modelocking lasers and Lyot-filter lasers both produce a comb of multiple wavelengths which can be placed on the ITU grid for Dense Wave Division Multiplexing (DWDM) or used to give each suburban home its own return-signal laser wavelength in a passive optical network (PON) used to provide FTTH (Fiber To The Home).".
- Lyot_filter wikiPageID "2929032".
- Lyot_filter wikiPageLength "3629".
- Lyot_filter wikiPageOutDegree "26".
- Lyot_filter wikiPageRevisionID "544163685".
- Lyot_filter wikiPageWikiLink Astronomy.
- Lyot_filter wikiPageWikiLink Bernard_Lyot.
- Lyot_filter wikiPageWikiLink Birefringence.
- Lyot_filter wikiPageWikiLink Brewsters_angle.
- Lyot_filter wikiPageWikiLink Category:Optical_filters.
- Lyot_filter wikiPageWikiLink Depolarizer_(optics).
- Lyot_filter wikiPageWikiLink Fiber_to_the_x.
- Lyot_filter wikiPageWikiLink International_Telecommunication_Union.
- Lyot_filter wikiPageWikiLink Laser.
- Lyot_filter wikiPageWikiLink Liquid_crystal_tunable_filter.
- Lyot_filter wikiPageWikiLink Lyot_stop.
- Lyot_filter wikiPageWikiLink Mode-locking.
- Lyot_filter wikiPageWikiLink Optical_cavity.
- Lyot_filter wikiPageWikiLink Optical_filter.
- Lyot_filter wikiPageWikiLink Optical_path_length.
- Lyot_filter wikiPageWikiLink Passband.
- Lyot_filter wikiPageWikiLink Passive_optical_network.
- Lyot_filter wikiPageWikiLink Phase_velocity.
- Lyot_filter wikiPageWikiLink Polarizer.
- Lyot_filter wikiPageWikiLink Quartz.
- Lyot_filter wikiPageWikiLink Refractive_index.
- Lyot_filter wikiPageWikiLink Sun.
- Lyot_filter wikiPageWikiLink Wavelength.
- Lyot_filter wikiPageWikiLink Wavelength-division_multiplexing.
- Lyot_filter wikiPageWikiLink Waveplate.
- Lyot_filter wikiPageWikiLinkText "Lyot filter".
- Lyot_filter wikiPageUsesTemplate Template:Optics-stub.
- Lyot_filter wikiPageUsesTemplate Template:Refimprove.
- Lyot_filter wikiPageUsesTemplate Template:Reflist.
- Lyot_filter subject Category:Optical_filters.
- Lyot_filter hypernym Filter.
- Lyot_filter type Software.
- Lyot_filter type Filter.
- Lyot_filter comment "A Lyot filter, named for its inventor Bernard Lyot, is a type of optical filter that uses birefringence to produce a narrow passband of transmitted wavelengths. Lyot filters are often used in astronomy, particularly for solar astronomy.A Lyot filter is made from one or more birefringent plates (usually quartz), with (in multi-plate filters) each plate being half the thickness of the previous one.".
- Lyot_filter label "Lyot filter".
- Lyot_filter sameAs Q121434.
- Lyot_filter sameAs Lyot-Filter.
- Lyot_filter sameAs Filtro_di_Lyot.
- Lyot_filter sameAs m.08d9n7.
- Lyot_filter sameAs Lyotov_filter.
- Lyot_filter sameAs Q121434.
- Lyot_filter wasDerivedFrom Lyot_filter?oldid=544163685.
- Lyot_filter isPrimaryTopicOf Lyot_filter.