Recording unidimensional holograms with reduced positional sensitivity during readout

A method for holographic recording of information received in the form of electrical signals wherein a coherent object wave pulse-modulated by the electrical signal interferes with a coherent reference wave to produce a unidimensional hologram upon a moving photosensitive storage medium wherein said coherent object wave and said coherent reference wave each have spherical wave fronts at the hologram storage medium, said object wave front having an origin at a point P and said reference wave front having an origin at a point R wherein the reference wave source point R and object wave source point P are related by and lie on the following curve, defined by the following equations:

• ##EQU8## wherein P.sub.1, P.sub.2, P.sub.3 and R.sub.1, R.sub.2, R.sub.3, respectively, are the Cartesian coordinates of the image point P and the reference point R and .epsilon. is plus one if a divergent wave and convergent wave are being used and is minus one if both waves are divergent or both are convergent where the photosensitive storage medium being located on the "1-2 plane" and centered about the "3 axis". pg,11