Resolution of the interference patterns of doubly exposed Gabor hologram

Abstract

In this paper, the resolution of the four interference patterns of the doubly exposed Gabor hologram was investigated. For a small axial shift, the resultant pattern was found to be outside the field of diffraction of an Airy's disk of the speckles. As for the other three interference gaps, the patterns for each order of interference were not resolved. The phase shift between these patterns was found to be less than the minimum phase change for the Rayleigh criterion of resolution. Moreover, the difference in the radii for the patterns at each order of interference was found to be much less than the experimental error.