Numerical heterodyne holography with two-dimensional photodetector arrays

TL;DR

This paper introduces a novel heterodyne holography technique using 2D photodetector arrays for digital holography, enabling high-resolution imaging of objects up to 13 mm with improved field of view and resolution over traditional methods.

Contribution

The paper presents an original heterodyne holography method based on two-dimensional detection, demonstrating its effectiveness and advantages over off-axis digital holography.

Findings

High-resolution images of objects up to 13 mm were successfully reconstructed.

Heterodyne holography outperforms off-axis digital holography in field of view and resolution.

A spatial filter is necessary to select properly sampled near-axis photons.

Abstract

We present an original heterodyne holography method for digital holography that relies on two-dimensional heterodyne detection to record the phase and the amplitude of a f ield. The technique has been tested on objects as much as 13 mm in size. Consistency checks were performed, and high-resolution images were computed. We show the requirement for a spatial f ilter to select properly sampled near-axis photons. Heterodyne holography is superior to off-axis digital holography for both f ield of view and resolution.