New convolution algorithms for reconstructing extended objects encoded in digitally recorded holograms

摘要

The paper has presented two numerical methods for reconstructing large objects using a convolution method with an adjustable magnification based on the use of a virtual spherical reconstructing wave. The filtering is realized using a modified version of the angular spectrum transfer function or using the spatially phase biased Fresnel response of free space propagation. Experimental results presented in the case of monochrome and two-color recordings confirm the suitability of the proposed methods.