Diffraction Gratings permit many and diverse optical processing techniques to be carried out with light of greatly reduced coherence, either spatial or temporal. Several such techniques are described, including phase-amplitude imaging, fringe projection and tomography.
E. N. Leith,
G. J. Swanson,
"Optical Processing Techniques In Incoherent Light", Proc. SPIE 0388, Advances in Optical Information Processing I, (23 December 1983); doi: 10.1117/12.934975; https://doi.org/10.1117/12.934975