Off-axis digital hologram reconstruction: some practical considerations

TL;DR

This paper reviews numerical methods for off-axis digital hologram reconstruction, compares classical and advanced techniques, and provides practical guidelines for optimizing image quality based on experimental parameters.

Contribution

It offers a comprehensive comparison of Fourier-based and linear system methods, introduces less common reconstruction schemes, and assesses experimental influences for improved hologram rendering.

Findings

Classical Fourier methods are effective but sensitive to experimental parameters.

Adjustable magnification schemes improve reconstruction flexibility.

Guidelines are provided for optimal hologram recording conditions.

Abstract

Holographic rendering of off-axis intensity digital holograms is discussed. A review of some of the main numerical processing methods, based either on the Fourier transform interpretation of the propagation integral or on its linear system counterpart, is reported. Less common methods such as adjustable magnification reconstruction schemes and Fresnelet decomposition are presented and applied to the digital treatment of off-axis holograms. The influence of experimental parameters on the classical hologram reconstruction methods is assessed, offering guidelines for optimal image rendering regarding the hologram recording conditions.