The Chirp-Z-Transform in Digital Holography
Today holography is used to take images of a wide spectrum of different objects. At present digital detectors are used to record the holograms. Then the reconstruction of the object is done with a computer. Here the chirp-z-transform is introduced to get a more flexible and simple reconstruction process. First the common digital reconstruction process is described. After that the chirp-z-transform will be presented. We show that the chirp-z-transform can be denoted as an adaptive Fourier transform. Different applications of the chirp-z-transform for digital holography are shown. A discussion of the calculation time is also included.
Keywords: CHIRP-Z-TRANSFORM; DIGITAL HOLOGRAPHY; DIGITAL SIGNAL PROCESSING
Document Type: Research Article
Publication date: 01 April 2005
- The growing interest and activity in the fields of holography and speckle require a forum for rapid dissemination of important results. Journal of Holography and Speckle (JOHAS) is that international forum which offers scientists and engineers timely, peer-reviewed research in these fields. Journal of Holography and Speckle publishes original rapid communications, full research papers and timely state-of-the-art reviews (with author's biography and photo) encompassing the fundamental and applied research in all areas of holography, and speckle.
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