Simple complex amplitude encoding of a phase-only hologram using binarized amplitude

TL;DR

This paper proposes a novel method for encoding complex amplitude in phase-only holograms using binary amplitude approximation, improving reconstruction quality demonstrated through hologram and beam generation examples.

Contribution

It introduces a simple binary amplitude encoding technique for phase-only holograms, enhancing their ability to represent complex amplitudes.

Findings

Effective complex amplitude encoding with binary amplitude.

Improved hologram reconstruction quality.

Successful generation of Hermite-Gaussian beams.

Abstract

For this work, we introduced the use of binary amplitude for our proposed complex amplitude encoding of a phase-only hologram. By principle, a complex amplitude in a hologram plane can be represented by the amplitude and its phase. However, a phase-only hologram contains only phase information of the complex amplitude, which results in degradation of reconstruction quality from the hologram. In our method, by approximating the amplitude in the hologram plane using a binary amplitude, we can finally record the complex amplitude of an original light in the phase-only hologram. We validated the effectiveness of our method with two examples, hologram reconstruction and generation of Hermite-Gaussian beams.