Multiplexing, as applied to interferometry, is the combination of separate interferometric tests to yield additional information about test object deformation. This paper details the multiplexing of moire interferometry to yield additional information through (1) object test comparison, (2) comparison of directional components of test object displacement, and (3) zero-order fringe location through secondary moire pattern analysis.
J. A. Tome,
F. T. S. Yu,
"Multiplexed Moire Interferometry With White Light Processing," Optical Engineering 24(5), 245879 (1 August 1985). https://doi.org/10.1117/12.7973592