Video-rate holographic telepresence via single-shot, reference-free wavefront measurement

TL;DR

This paper introduces a real-time, reference-free holographic telepresence system that captures and reconstructs complex wavefronts from a single intensity measurement, enabling dynamic 3D visualization at 28 fps.

Contribution

It presents a novel single-shot, reference-free wavefront measurement method using speckle correlation and phase retrieval, advancing holographic telepresence technology.

Findings

Achieves video-rate holographic reconstruction at 28 fps.

Demonstrates volumetric refocusing and dynamic 3D imaging.

Operates with modest bandwidth and no reference beam.

Abstract

We present a reference-free holographic telepresence system that directly captures and replays complex optical wavefronts from a single intensity speckle measurement. Using a pre-characterized geometric phase diffuser, the incident field self-interferes to form a speckle pattern, from which the wavefront is recovered via a speckle-correlation scattering-matrix approach and refined using smoothed amplitude flow with Nesterov acceleration. The reconstructed phase is directly projected onto a spatial light modulator for holographic replay. We demonstrate volumetric refocusing, dynamic three-dimensional reconstruction, and sustained video-rate operation at approximately 28 frames per second with modest communication bandwidth. The results highlight measurement-driven wavefront acquisition as a practical pathway toward compact and physically faithful holographic telepresence.