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Author Topic: Resolution of a Michelson interferometer  (Read 4141 times)

Offline udiv

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Resolution of a Michelson interferometer
« on: 03/04/2011 07:04:23 »
How to find the resolution of Michelson interferometer ?


 

Offline graham.d

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Resolution of a Michelson interferometer
« Reply #1 on: 03/04/2011 13:20:55 »
What do you mean by "resolution" in this context? If you are trying to measure the difference in path length between the two orthogonal directions (or the difference in the speed of light as was originally intended) then the resolution limit is governed by the wavelength of the wave (or wave-particles) you are using. Generally you could resolve quite a small fraction of a wavelength (with enough careful measurements) but the smaller the wavelength, the finer the resolution.

To find the resolution you should simply change the path length in one arm and measure the intensity at the detector. It should be just a matter of analysing the statistics of multiple measurements to work out the standard deviation of any one result.
 

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Resolution of a Michelson interferometer
« Reply #1 on: 03/04/2011 13:20:55 »

 

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