Holographic multiconfiguration off-axis reflector for AR NED with large eyebox

Research on off-axis reflector-based Augmented Reality Near-Eye Displays (AR NED) is advancing. These displays use a single light source, resulting in a narrow Eyebox and Field of View (FOV), but they are lightweight and suitable for long-term use. <br/> <br/> Holographic Optical Elements (HOEs) are used to enhance image quality with narrow-bandwidth laser light sources. Adding compensating HOEs can increase the Eyebox when using micro OLEDs with a wide spectral bandwidth. However, achieving a 15mm Eyebox remains challenging without user calibration for interpupillary distance. <br/> This presentation explores increasing the Eyebox in the off-axis reflector AR NED using Holographic multi-configuration, which involves angular multiplexing HOEs at two different angles. The research team designed prototypes and compared models with and without Holographic Multi-configuration. <br/> <br/> In conclusion, the study presents a prototype structure using a wide spectral bandwidth uOLED and two angularly multiplexed HOEs to achieve a larger Eyebox.