Influence of longitudinal vibrations on the diffraction images of bright incoherent disks.

The intensity distribution in the images of uniform bright incoherent disks is obtained in the presence of longitudinal vibrations by using the Fourier Hankel transform method. Results are given in graphical form for disks with various diameter values. It is observed that in certain cases the presence of longitudinal vibrations completely distorts the object. Hence a detailed analysis of image intensity distribution should prove useful to those engaged in interpretation of photographs in aerial reconnaissance work.