Real-time interference fringes have been observed with a diffusely reflecting object in a holographic setup even when the photographic plate is exposed and viewed with the reference beam blanked off. Linear theory can account for these fringes if the major part of the object remains unchanged.
© 1978 Optical Society of America
P. Hariharan, "Hologram interferometry without a reference beam," Opt. Lett. 2, 122-123 (1978)