A generalized technique of two-wavelength, nondiffuse holographic interferometry is developed for use with transparent experimental media. It is shown that a single pair of nondiffuse transmission holograms recorded simultaneously at different wavelengths can be reconstructed so as to produce a large number of interferograms with widely varying sensitivities. For ease in interpretation, these interferograms can have either an infinite-fringe background or a multiple-fringe background with any desired fringe orientation and spacing.
F. Weigl, "A Generalized Technique of Two-Wavelength, Nondiffuse Holographic Interferometry," Appl. Opt. 10, 187-192 (1971)