Characteristics of the holographic diffuser in integral imaging display systems: A quantitative beam analysis approach

Abstract

The holographic diffuser plays a significant role in the reconstruction performance of the large-size integral imaging display system. However, the influence of the holographic diffuser on the display quality is seldom theoretically analyzed. In this paper, a quantitative beam analysis approach is proposed, and a diffusing model is established to analyses the influence of the position and diffusing-angle of the holographic diffuser on different reconstruction points, then the mechanism of the aliasing effect caused by the holographic diffuser is revealed. Both the numerical and optical experiments are implemented to prove the validity of the established model, and the results are well agreed with the theoretical analysis, which shows that when the holographic diffuser with a certain diffusing-angle is located at the far-end of the marginal depth plane instead of the traditional central depth plane (CDP), the system can obtain an enhanced aliasing-free depth of field and have a better viewing effect, which is inconsistent with the traditional intuition and experience.