Mini Review Open Access

Enhance the Focus Cues of Holographic 3D Display Based on Multiple Directional Light Reconstruction

Abstract

In hologram computation, adding random phase to the image plane can result in significant defocus blur during image reconstruction, providing strong focus or depth cues. However, the drawback is that random phase introduces strong speckle noise, reducing the image quality. On the other hand, adding uniform phase to the image plane suppresses speckle noise, improving the quality of the reconstructed image. However, the downside of uniform phase holograms is that the beam's divergence angle is smaller, resulting in less noticeable defocus blur, which diminishes focus cues and the sense of depth in holographic displays. Thus, holographic displays face a trade-off between image quality and focus cues, depending on whether the phase distribution used is random or uniform.

Zi Wang*