Detail displaying and vision aberration rectifying of reconstructed image in digital holography

Based on analyzing resolution of digital holographic system and sampling space in reconstructed image plane, a simple, convenient and effective method is presented, which can increase the display resolution of the reconstructed field in Fresnel-transform reconstruction of digital holograms. By padding zeros operation to a digital hologram recorded by charge-coupled device (CCD), sampling space in the reconstructed image plane is decreased and pixel numbers in the reconstructed image are increased, and then the reconstructed image with high quality is obtained. With similar method, the vision aberration of reconstructed images resulted from the difference of CCD size in horizontal and vertical direction is rectified. Experimental results show a good agreement with the theoretical analysis.