Digital Pre-Distorted One-Step Phase Retrieval Algorithm for Real-Time Hologram Generation for Holographic Displays

TL;DR

This paper introduces a digital pre-distortion method combined with a one-step phase retrieval algorithm to improve real-time hologram generation quality by correcting system non-linearities in holographic displays.

Contribution

It presents a novel DPD-OSPR algorithm that enhances hologram reconstruction accuracy and reduces errors in real-time holographic projection systems.

Findings

Increased reconstruction quality with DPD-OSPR

Significant reduction in mean squared error

Effective correction of system non-linearities

Abstract

In a computer-generated holographic projection system, the image is reconstructed via the diffraction of light from a spatial light modulator. In this process, several factors could contribute to non-linearities between the reconstruction and the target image. This paper evaluates the non-linearity of the overall holographic projection system experimentally, using binary phase holograms computed using the one-step phase retrieval (OSPR) algorithm, and then applies a digital pre-distortion (DPD) method to correct for the non-linearity. Both a notable increase in reconstruction quality and a significant reduction in mean squared error were observed, proving the effectiveness of the proposed DPD-OSPR algorithm.