INTERFEROMETRO DE MICHELSON PDF
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Introductory Physics fig 1. The other interferometer arm is bounced off a reference mirror.
Views Read Edit View history. Michelson pointed out that constraints on geometry forced by the limited coherence length required the use of a reference mirror of equal size to the test mirror, making the Twyman-Green impractical for many purposes.
This page was last edited on 13 Decemberat If, as in Fig. On the other hand, using white broadband light, the central fringe is sharp, but away from the central fringe the fringes are colored and rapidly become indistinct to the eye. By performing multiple scans, moving the reference mirror between each scan, an entire three-dimensional image of the tissue can be reconstructed.
That can be only micrometers for white light, as discussed below. The fringes can be interpreted as the result of interference between light coming from the two virtual images S’ 1 and S’ 2 of the original source S. The corresponding shift in the Potsdam interferometer had been 0.
Interferômetro de Michelson – Wikipédia, a enciclopédia livre
A convex spherical mirror is positioned so that its center of curvature coincides with the focus of the lens being tested. All articles with unsourced statements Articles with unsourced statements from June Interferometrp category link is on Wikidata.
Using a beam splittera light source is split into two arms. More recently, the Helioseismic and Magnetic Imager HMIon the Solar Dynamics Observatoryemploys two Michelson Interferometers with a polarizer and micyelson tunable elements, to study solar variability and to characterize the Sun’s interior along with the various components of magnetic activity.
M is partially reflective, so part of the light is transmitted through to point B while some is reflected in the direction of A. When using a noisy detector, such as at infrared wavelengths, this offers an increase in signal to noise ratio while using only a single detector element; 2 the interferometer does not require a limited aperture as do grating or prism spectrometers, which require the incoming light to pass through a narrow slit in order to achieve high spectral resolution.
On the negative side, Michelson interferometers have a relatively restricted wavelength range, and require use of prefilters which restrict transmittance. Advanced Technology Solar Telescope.
A practical Fourier transform spectrometer would substitute corner cube reflectors for the flat mirrors of the conventional Michelson interferometer, but for simplicity, the illustration does not show this. The Twyman-Green interferometer is a variation of the Michelson interferometer used to test small optical components, invented and patented by Twyman and Green in If there is a slight angle between the two returning beams, for instance, then interfferometro imaging detector will record a sinusoidal fringe intedferometro as shown in Fig.
A Fourier transform converts the interferogram into an actual spectrum. They were then of course colored, except the central band, which was nearly black.
Retrieved 3 April Michelxon emergent beam is recorded by an imaging system for analysis. The Michelson stellar interferometer is used for measuring the diameter of stars. Even a narrowband or “quasi-monochromatic” spectral source requires careful attention to issues of chromatic dispersion when used to illuminate an interferometer. From Wikimedia Commons, the free media repository. Michelson interferometer with labels.
Michelson Interferometer Green Laser Interference. In other projects Wikimedia Commons Wikipedia. Retrieved 29 April This involves detecting tiny strains in space itself, affecting two long arms of the interferometer unequally, due to a strong passing gravitational wave.
Michwlson seen in Fig. Michelson Interferometers Michelson-Morley experiment. Both mirrors in a Michelson interferometer can be replaced with Gires—Tournois etalons. As interferometfo in Fig. From Wikipedia, the free encyclopedia. The requirement for dispersion equalization is eliminated by using extremely narrowband light from a laser. Archived from the original PDF on 10 August Reflected light from the tissue sample is combined with reflected light from the reference.
The null result of that experiment essentially disproved the existence of such an aether, leading eventually to the special theory of relativity and the revolution in physics at interferomero beginning of the twentieth century. Each of those light beams is reflected back toward the beamsplitter which then combines their amplitudes using the superposition principle.
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This system used fibre optic direction coupler. Single longitudinal mode lasers are highly coherent and can produce high contrast interference with differential pathlengths of millions or even billions of wavelengths.