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6 years ago in Discussion By Sal Gray
Physical principle behind michelson interferometers
Could someone explain to me the principle behind michelson interferometers? Also explain the michelson interferometer. I haven’t used them earlier and hence do not know much about them.
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By Renu Answered 6 years ago
1.When a light source with low optical bandwidth is used, the detector signal differs periodically when the difference in arm lengths is changed. Such a signal enables to do measurements with a depth resolution.
2.If the detector is a kind of camera and the surfaces monitored are smooth, the phase profile can be reconstructed by recording multiple images with various overall phase shifts.
3.A wavelength-tunable source (laser) can be used to record the detector signal for various optical frequencies. From such signals, the arm length difference can be unambiguously retrieved.
4.If one of the mirrors is tilted, an interference fringe pattern will be obtained. Any change in arm length difference will moven the fringe pattern as well.
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By Ritesh Tomar Answered 6 years ago
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By Amrit Singh Answered 6 years ago
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