Video-rate wavefront capture and replay via single-shot reference-free measurement: toward holographic telepresence
通过单次无参考测量实现视频速率波前捕获与重现：迈向全息远程呈现
ビデオレートの波面キャプチャと再生を単一ショットの参照なし測定で実現：ホログラフィック・テレプレゼンスへの道筋
비디오 속도 파면 캡처 및 재생을 위한 단일 셔터 참조 없이 측정: 홀로그래픽 원격 참석을 향하여
Captura y reproducción de frente de onda a velocidad de video mediante medición de una sola toma sin referencia: hacia la telepresencia holográfica
Capture et retransmission de fronts d'onde en temps réel via une mesure unique sans référence : vers la télésanté holographique
Видеоскоростная захват и воспроизведение волнового фронта с помощью однокадрового измерения без эталона: к голографической телепрезентации
Minwook Kim ¹ ², Chansuk Park ¹ ² ³, Chulmin Oh ¹ ², KyeoReh Lee ¹ ² ⁴, Herve Hugonnet ¹ ², YongKeun Park ¹ ² ⁵
¹ Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
² KAIST Institute for Health Science and Technology, KAIST, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
³ Current affiliation: Samsung Electro-Mechanics, Maeyeong-ro 150, Yeongtong-gu, Suwon 16674, Republic of Korea
⁴ Current address: Department of Applied Physics, Yale University, New Haven, 06520 Connecticut, USA
⁵ Tomocube Inc., 141 Jukdong-ro, Yuseong-gu, Daejeon 34109, Republic of Korea
We present a reference-free holographic telepresence framework that captures and replays the complex optical wavefront of a three-dimensional scene from a single intensity speckle measurement. A pre-characterized geometric phase diffuser encodes the incident field into a deterministic speckle pattern, enabling reference-free acquisition through a calibrated, invertible forward model.
The wavefront is recovered via scattering-matrix inversion with smoothed amplitude flow and Nesterov acceleration, and directly projected onto a spatial light modulator for holographic replay. This measurement-driven pipeline eliminates interferometric reference beams and multi-frame acquisition, enabling single-shot operation at video rate (~28 fps) with sub-gigabit bandwidth. We experimentally demonstrate volumetric refocusing and dynamic three-dimensional reconstruction, confirming that the recovered field preserves physically consistent propagation behavior.
Although image quality is currently limited by coherent speckle, both experiments and simulations show systematic improvement with temporal averaging and system scaling. These results establish real-time, measurement-based wavefront capture and replay as a viable and complementary approach to model-based holographic telepresence.
