I Michelson interferometer dimensions

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To design a Michelson interferometer for measuring small distance movements, the dimensions must be carefully calculated based on the setup requirements. The distance from the beam splitter to the moving mirror should be 35 mm, which is the same distance for the fixed mirror to maintain balance in the system. The wavelength of the laser diode at 635 nm will influence the fringe spacing observed during measurements. The equation d = mλ/2 is crucial for determining the relationship between the displacement of the object and the resulting fringe shifts. Proper selection of the fixed mirror dimensions is essential for optimal performance and alignment in the interferometer setup.
malak
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hi
i want to design michelson interferometer device for measuring small distance movement
i am using laser diode with a wavelength 635 nm and power 3 mw
can anyone tell me how can i decide the dimensions (from source to beam splitter , for beam splitter to fixed mirror , from beam splitter to detector )
knowing that the moving mirror should be placed 35 mm from beam splitter (the tested object position )
also how can i choose the fixed mirror dimensions ?
regards
 
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the equation used in michelson interferometer is

d = mλ/2

so then I will put my fixed mirror also at 35 mm, if there are a displacement in the object there will be a differences in the amount of fringes
 
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