FIELD: physics.
SUBSTANCE: invention employs an electrodynamic head, for which the resonance frequency fr, which gives rise to spurious vibrations, is effectively suppressed by an active system with feedback owing to that the resonance frequency is located sufficiently away from the mirror vibration frequency f on the frequency axis.
EFFECT: high accuracy of measuring a spectrum with the disclosed interferometer with a vibrating mirror.
5 cl, 4 dwg
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