En óptica, un interferómetro de Fabry-Pérot, o Etalon está, normalmente, constituido por una placa con dos superficies reflectantes, o dos espejos paralelos. volo per applicazioni in campo astronomico da satellite. Viene presentato l’ interferometro di. Fabry-Pérot all’interno del quadro degli spettroscopi per uso. Media in category “Fabry-Pérot interferometer”. The following 37 files are in this category, out of 37 total. Airy distribution of a Fabry-Perot.
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It is named after Charles Fabry and Alfred Perotwho developed the instrument in If the reflectivity is high, resulting in a high Fzbry factormonochromatic light produces a set of narrow bright rings against a dark background. The second term is proportional to a wrapped Lorentzian distribution so that the transmission function may be written as a series of Lorentzian functions:.
Interferômetro de Fabry-Pérot
Archived from the original pdf on If the two beams are out of phase, only a small portion of the launched light is stored inside the resonator.
The Taylor criterion of spectral resolution proposes that two spectral lines can be resolved if the individual lines cross at half intensity. Whereas the photon decay time is still a well-defined quantity, the linewidth loses its meaning, because it resembles a spectral bandwidth, whose value now changes within that very bandwidth.
The total amplitude of both beams will be the sum of the amplitudes of the two beams measured along a line perpendicular to the direction of the beam. In the accompanying illustration, only one ray emitted from point A on intterferometro source interferometri traced. Since it is interference that modifies the spectral contents, the spectral intensity distribution inside the resonator interfeeometro be the same as the incident spectral intensity distribution, and no resonance enhancement would occur inside the resonator.
Therefore, the Airy distribution becomes the underlying fundamental function and the measurement delivers a sum of Airy distributions. Since the incident beam was assumed to have an intensity of one, this will also give the transmission function:. Please help improve this article by adding citations to reliable sources.
Please help improve this section by adding citations to reliable sources.
This page was last edited on 2 Pperotat The generic Airy distribution, which considers solely the physical processes exhibited by light inside the resonator, then derives as the intensity circulating in the resonator relative to the intensity launched, . If both surfaces have a reflectance Rthe transmittance function of the etalon is given by. Retrieved from ” https: Its perit spectrum as a function of wavelength exhibits peaks of large transmission corresponding to resonances of the etalon.
Physically, the Airy distribution is the sum of mode profiles of the longitudinal resonator modes.
Fabry–Pérot interferometer – Wikipedia
Each mode has a normalized spectral line shape per unit frequency interval given by. Fwbry limiting case occurs at. May Learn how and when to remove this template message.
Etalons with high finesse show sharper transmission peaks with lower minimum transmission coefficients. In the oblique incidence case, the finesse will depend on the polarization state of the fxbry, since the value of “R”, given by the Fresnel equationsis generally different for p and s polarizations. At point c the transmitted amplitude will be. Air—fuel ratio meter Blind spot monitor Crankshaft position sensor Curb feeler Iterferometro detector Engine coolant temperature sensor Hall effect sensor MAP sensor Mass flow sensor Omniview technology Oxygen sensor Parking sensors Radar gun Speed sensor Speedometer Throttle position sensor Tire-pressure monitoring system Torque sensor Transmission fluid temperature sensor Turbine speed sensor Variable reluctance sensor Vehicle speed sensor Water sensor Wheel speed sensor.
Etalons are widely used in telecommunications fsbry, lasers and spectroscopy to control and measure the wavelengths of light. Diode Lasers and Photonic Integrated Circuits 2nd ed.
To within a constant multiplicative interfeerometro factor, the amplitude of the m th transmitted beam can be written as:. If the transmitted beams are out-of-phase, destructive interference occurs and this corresponds to a transmission minimum. The transmitted amplitude at point b will then be.
A focusing lens after the pair of flats would produce an inverted image of the source if the flats were not present; all light emitted from a point on the source is focused to a single point in the system’s image plane.
The amplitude can be rewritten as.
Also in this case each Airy distribution is the sum of all underlying mode profiles which can be strongly distorted. As the ray passes interferoetro the paired flats, it is multiply reflected to produce multiple transmitted rays which are collected by the focusing lens and brought to point A’ on the screen.
Interferômetro de Fabry-Pérot – Wikipédia, a enciclopédia livre
The complete interference pattern takes the appearance of a set of concentric rings. CS1 French-language sources fr Articles needing additional references from May All articles needing additional references Articles needing additional references from October Optical Physics 3rd ed.
Light is launched into the resonator under normal incidence.