A Study of the Field of View Performance for Full-Color Waveguide Displays Based on Polarization Volume Gratings
Yuchen Gu, Yishi Weng, Yuning Zhang, Chuang Wang, Ran Wei, Wei Wang, Nan Lin, Lixuan Zhang, Baoping Wang
Abstract
Multilayer waveguide structures can realize full-color AR displays of diffractive waveguides. This paper discusses the field-of-view characteristics of a waveguide system with a multilayer structure when polarization volume gratings (PVG) are applied as couplers to achieve a full-color display. The effects of the refractive index and period parameter of PVG-couplers on the field of view are investigated. In addition, a PVG waveguide sample with an optimized design is prepared. The experimental results show that the designed waveguide system can achieve a full-color AR display with a 45° diagonal field of view, which verifies the feasibility of the design and provides a potential solution for AR color waveguide display applications.