Using the coherence function of a multimode laser source, a technique is presented that produces rainbow holographic images without employing a slit for recording. A slit-shaped pupil is though synthetically produced whose extent and position can be controlled by the experimental parameters.
S. F. Jacobs,
"Rainbow Holography With A Multimode Laser Source", Proc. SPIE 0600, Progress in Holographic Applications, (30 June 1986); doi: 10.1117/12.952441; https://doi.org/10.1117/12.952441