Measurement methods of optical spatial coherence and their comparison

This paper concluded measurement methods based on wavefront splitted principle such as Young interference method, reversed-wavefront Young interference method, nonredundant array interference method and measurement methods based on amplitude splitted principle such as self-referencing interference method. Their basic principles and experimental setup were introduced, and then the merits and defects of these methods were compared, and then the best applied field of each method was put forward. The conclusion of this paper could be used as elementary guidance for different demands of spatial coherence measurement to choose proper methods.