Using a 2×2 holographic lens array and a virtual focus imaging method, PS optical interconnection of the 2D elements group is realized under the parallel light input. The virtual focus imaging PS transformation of 2N×2N input element group is directly realized by the lens array. The imaging magnifying power is 2N and the imaging distance lH varies linearly with N. When an imaging lens L is inserted behind the lens array, the deduced formulas of imaging distance relate mainly to the focal length and the imaging magnifying power relates mainly to the ratio between the imaging lens focal length and the holographic lens focal length. The experiments prove correctness of the formulas.