In making in-line holograms of amplitude objects with a strong background, the single-sideband technique can be used to improve the quality of the reconstruction. The main advantage of this method is the suppression of the twin image. Modifications of the same technique are also presented for making holograms of complex objects and objects with a weak background.
OLOF BRYNGDAHL and ADOLF LOHMANN, "Single-Sideband Holography," J. Opt. Soc. Am. 58, 620-624 (1968)