Abstract
A new method for eliminating zero-order image and reconstructing the original image with high quality is described in this paper. In this method, the differential of the detected hologram intensity is used instead of the hologram itself for numerical reconstruction by computing the discrete Fresnel integral. This method is based on digital image processing free of any extra optical element. It can improve the image quality significantly and give better resolution and higher accuracy of the reconstructed image. The main advantages of this method are its simplicity in experimental requirements and convenience in data processing. The theoretical analysis is given and experimental results are presented.
