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%.
White Papers about BPGs
- Bragg polarization gratings for wide angular bandwidth and high efficiency at steep deflection angles
- Nanoscale liquid crystal polymer Bragg polarization gratings
- 20 Degree Field of View
- 40% Grating Efficiency
- > 100um Thickness
- 60 Degree Field of View
- 99% Grating Efficiency
- 2um Thickness
Any desired angle of incidence (e.g., in=0۠) can be waveguided by selecting the proper slant angle G and period Λ.
Diffraction angle Θ1 must follow grating equation, where nin and nout are refractive
We make optics thinner, lighter, and more efficient than anyone else. How can our optics help you?
Fill out the form below to see how our expertise can help with your next project.