4 October 2021 Kaczmarz holography: holographic projection in the Fraunhofer region
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Abstract

The Kaczmarz algorithm is an iterative method for solving linear equations in the form of Ax  =  b. It is widely used in computed tomography and digital signal processing (DSP) but has yet to be adopted in computer-generated holography. Phase retrieval algorithms, such as Gerchberg–Saxton or Fienup, are significantly more popular in this field. However, we propose a unique and alternative approach to projecting a replay field through discrete Fourier transform matrices and have shown that there are legitimate benefits to implementing this approach. The gradient descent iteration mechanism adopted by Kaczmarz, for instance provides finer granularity control over the individual pixels in the replay field. We consequently demonstrate the quality of the image is significantly improved when compared with Gerchberg–Saxton.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2021/$28.00 © 2021 SPIE
Miguel De V. El Guendy, Ralf Mouthaan, Benjamin Wetherfield, Andrew Kadis, Peter J. Christopher, Andrzej Kaczorowski, and Timothy D. Wilkinson "Kaczmarz holography: holographic projection in the Fraunhofer region," Optical Engineering 60(10), 103101 (4 October 2021). https://doi.org/10.1117/1.OE.60.10.103101
Received: 14 June 2021; Accepted: 21 September 2021; Published: 4 October 2021
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KEYWORDS
Holography

Image quality

Spatial light modulators

Holograms

Detection and tracking algorithms

Digital signal processing

Optical engineering

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