Single-shot speckle reduction in numerical reconstruction of digitally recorded holograms.

Comment on “Single-shot speckle reduction in numerical reconstruction of digitally recorded holograms”

We comment on a recent Letter by Hincapie et al. [Opt. Lett. 40, 1623 (2015)] [1] in which the authors proposed a method to reduce the speckle noise in digital holograms. This method was previously published by us in Maycock [2] and Maycock and Hennelly [3]. We also wish to highlight an important limitation of the method resulting from the superposition of different perspectives of the object/s...

How fast can one numerically reconstruct digitally recorded holograms?

Results of comparative study of the computational complexity of different algorithms for numerical reconstruction of electronically recorded holograms are presented and discussed. The following algorithms were compared: different types of Fourier and convolutional algorithms and a new universal DCT-based algorithm, in terms of the number of operations. Based on the comparison results, the feasi...

-

In this paper a method for digitally recording four quarter-reference-wave-holograms (by CCD) in a Mach-Zehnder interferometer setup, and reconstructing the object wave-front by numerical method is presented. The terms of direct transmission, auto-correlation and conjugate wave in the four wave reconstruction are cancelled out and only one original object wave is left after overlapping. Reconst...

Discrete transforms, fast algorithms, and point spread functions of numerical reconstruction of digitally recorded holograms

Digital recording and numerical reconstruction of holograms

This article describes the principles and major applications of digital recording and numerical reconstruction of holograms (digital holography). Digital holography became feasible since charged coupled devices (CCDs) with suitable numbers and sizes of pixels and computers with sufficient speed became available. The Fresnel or Fourier holograms are recorded directly by the CCD and stored digita...