Optical and electronic means have been devised and tested for reversible counting of fringes from a corner-cube or Michelson interferometer. Counting rates of 1000/sec have been achieved but do not represent the attainable limit.
EDSON R. PECK and S. WENDELL OBETZ, "Wavelength or Length Measurement by Reversible Fringe Counting," J. Opt. Soc. Am. 43, 505-507 (1953)