Large-FOV scattering-assisted holographic projection by enhanced sampling of transmission matrix

Abstract

Based on wavefront shaping, scattering materials provide a unique tool to break the trade-off between the viewing angle and field of view (FOV) for three-dimensional holographic projections. However, large-size image projection is limited by the low sampling ability of the transmission matrix (TM) of the scattering medium. Here, we propose a disperse and montage sampling strategy to access the TM for large-size image projection by scattering-assisted holography. Compared with the conventional TM sampling methods, our method achieves control of the output field with an enlarged FOV and improved adaptability. Experimentally, we achieve calibration of a TM corresponding to 1920 × 780 output pixels. As a proof of concept, we demonstrate holographic projection of large-size letter images within an area of 11.25 × 4.57 mm2 behind a scattering medium. In addition, we show that large-FOV vectorial projection can also be achieved by sampling the polarization-related TMs. Our work is expected to benefit scattering-assisted holographic techniques with potential applications in holographic display, imaging, and trapping.