Aberration-limited resolution in in-line Fraunhofer holography with co
llimated beams is described. All the primary aberrations are considere
d. Using the Rayleigh's quarter wavelength rule for the tolerable aber
rations, the allowable object diameters are then determined. These dia
meters are in terms of the recording and reconstruction wavelengths, t
he number of diffraction side lobes recorded, and the number of far fi
elds.