Back-light color holography system using a reflection hologram.

We propose a system that utilizes reflection holograms to realize color holography that illuminates from the back site. In this configuration, two types of polarizers and two quarter-wave plates are used. By combining these elements and controlling the polarization direction of the transmitted beam that passes through them, it is possible to avoid the drawbacks of the conventional method of illuminating from the front. The reconstructed image has a wide viewing angle, and a clear color image can be observed. The effectiveness of this configuration in the proposed color holography system is discussed with respect to the dependence of the polarization characteristics of the elements on the angle of incidence. We also constructed a benchtop prototype with this configuration and evaluated its effectiveness.