Method to suppress speckle noise using time multiplexing in phase‐only holographic display

Abstract

In holographic display, the reconstructed image suffers from speckle noise severely. In this paper, we propose a method to suppress speckle noise using time multiplexing in phase‐only holographic display. Adjacent pixels of the recorded object are separated into object point groups firstly. Particularly, the pixel interval of each object point group is larger compared with the conventional pixel separation method. And then, sub‐computer–generated holograms (sub‐CGHs) are calculated by the modified Gerchberg–Saxton (GS) algorithm with different initial random phases. Finally, the final integrated image is reconstructed with low speckle noise using time multiplexing technique. Both numerical and optical experimental results are presented to demonstrate the effectiveness and feasibility with our proposed method.

Fast Diffraction Calculation for Spherical Computer-Generated Hologram Using Phase Compensation Method in Visible Range

“…However, the reconstructed images are with obvious speckle noise since one phase-only hologram is used for each reconstruction. Therefore, the time division multiplexing method is used as optimization to suppress the speckle noise and improve the image quality as shown in Figure 11g-l [23]. All the results are in accordance with our theoretical analysis.…”