Rotational-motion interferometer

J. Kauppinen, J. Heinonen and I. Kauppinen, Interferometers based on rotational motion, Appl. Spectrosc. Rev., 39, 99-129 (2004). 

Kauppinen, J., Heinonen, J. and Kauppinen, I., Interferometers Based on Rotational Motion Applied Spectroscopy Reviews 2004, 39, 99-129. 

Figure 5.8 Interferometer using rotational motion (schematically illustrated). A pair of cube-corner retroreflectors are placed on the both arms of an L-type rotator. The OPD is generated by rotating this rotator around the axis.

M-M experiments typically yielded finite (nonzero) differences of speed along two perpendicular positions of the interferometer s reference arm. Such difference is consistently lower than the value to be expected from orbital motion alone (30 km/s), within the naive conventional approximation of not taking into account diurnal variations due to earth rotation. With the exception of Miller, all authors consistently interpreted their observations as nullresults. 

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