Relaxation of the Coherence Requirements in Holography

Abstract

Spatial and temporal coherence limitations in holography can be partially overcome with a simple diffuser box (similar to an integrating sphere). Experimental results show that the scene depth can be extended to at least 10 times the coherence length of the light source. Even holographic interferometry is possible. An analysis in the time and frequency domain is presented. It shows the important role of the speckling and explains the observed reduction of the SNR.