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.
|Published (Last):||6 September 2012|
|PDF File Size:||19.15 Mb|
|ePub File Size:||13.36 Mb|
|Price:||Free* [*Free Regsitration Required]|
In other projects Wikimedia Commons. October Learn how and when to remove this template message.
Interferômetro de Fabry-Pérot – Wikipédia, a enciclopédia livre
The complete interference pattern takes the appearance of a set of concentric rings. Two beams are shown in the diagram at the right, one of which T 0 is transmitted through the etalon, and the other of which T 1 is reflected twice before being transmitted. The stored, transmitted, and reflected light peeot spectrally modified compared to the incident light. The incident amplitude at point a is taken to be one, and phasors are used to represent the amplitude of the radiation.
In a typical system, illumination is provided by a diffuse source set at the focal plane of a collimating lens.
The maximum reflectivity is given by:. This section does not cite any sources. As the ray passes through 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. Active pixel sensor Angle—sensitive pixel Back-illuminated sensor Charge-coupled device Contact image sensor Electro-optical sensor Flame detector Infrared Kinetic inductance detector LED as light sensor Light-addressable potentiometric sensor Nichols radiometer Optical fiber Photodetector Photodiode Photoelectric sensor Photoionization detector Photomultiplier Photoresistor Photoswitch Phototransistor Phototube Position sensitive device Scintillometer Shack—Hartmann wavefront sensor Single-photon avalanche diode Superconducting nanowire single-photon detector Transition edge sensor Tristimulus colorimeter Visible-light photon counter Wavefront sensor.
The varying transmission function of an etalon pwrot caused by interference between the multiple reflections of light between the two reflecting surfaces. From Wikipedia, interferommetro free encyclopedia. Etalons with high finesse show sharper transmission peaks with lower minimum transmission coefficients. This page was last edited on 2 Novemberat Resonances occur at frequencies at which light exhibits constructive interference after one round trip.
The Taylor criterion of spectral resolution proposes that two spectral lines can be resolved if the individual lines cross at half intensity. Optical Physics 3rd ed.
The limiting case occurs at. If the transmitted beams are out-of-phase, destructive interference occurs and this corresponds to a transmission minimum. Retrieved from ” https: If the two beams are out of phase, only a small portion of the launched light is stored inside the resonator. 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.
At the point where.
Fabry–Pérot interferometer – Wikipedia
To within a constant multiplicative phase factor, the amplitude of the m th transmitted beam can be written as:. Since it is interference that modifies the spectral contents, the spectral intensity distribution inside the resonator would be the same as the incident spectral intensity distribution, and no resonance enhancement would occur inside the resonator.
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, .
Also in this case each Airy distribution is the sum of all underlying mode profiles which can be strongly distorted. 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.
For an asymmetrical cavity, that is, one with two different mirrors, the general form of the transmission function is. For the reference standard, see Standard metrology.
If the reflectivity is high, resulting in a high Q factormonochromatic light produces a set of narrow bright rings against a dark background. The intensity of interferomerto beam will se just t times its complex conjugate.
Constructive interference occurs if the transmitted beams are in phaseand this corresponds to a high-transmission peak of the etalon.
Please help improve this section by adding citations to reliable sources. Therefore, an often applied Airy distribution is . In contrast to the exact solution above, it leads to.
Etalons are widely used in telecommunicationslasers and spectroscopy to control and measure the wavelengths of light. Fourier transformation of the electric field in time provides the electric field per unit frequency interval.
However, interferkmetro approach is physically misleading, because it assumes that interference takes place between the outcoupled beams after mirror 2, outside the resonator, rather than the launched and circulating beams after mirror 1, inside the resonator.
The phase difference between each successive transmitted pair i.
At point c the transmitted amplitude will be. The amplitude can be rewritten as. Archived from the original pdf on