The future of augmented reality
- A Bragg polarization grating (BPG) is an optically “thick” grating that follows (2-4um)
- Bragg PGs are analogous to Volume Phase Holograms and Volume Bragg Gratings
How It Works
BPGs are a special case of polarization gratings that operate in the Bragg regime or Q>1. It has several unique properties that make it ideal for several applications including augmented and virtual reality. When operating in the Bragg regime, a polarization grating will diffract only a single polarization (+1st order) and leave the orthogonal polarization un-diffracted. With a circularly polarized input, the efficiency can reach up to 99%. For very wide field of views, the efficiency can be as high as 90%.