Numerical investigation of volume holographic waveguides for application to AR/MR glasses

In this study, virtual images of AR/MR glasses using volume-holographic waveguides were numerically investigated. Unlike surface-relief gratings that require multiple layers, volume holograms enable single-layer waveguides with higher diffraction efficiency, thereby enhancing light efficiency. However, varying the interaction volumes results in non-uniform light intensity across the field of view. To address this issue, a line-symmetric image input method was introduced. This method utilizes an input image with a line-symmetric shape to balance the luminance distribution within the field of view. We discuss the properties of the virtual images observed using our method.