Polarization Gratings
What is a Polarization Grating?
A polarization grating (PG) is a “thin film prism” that combines the functions of a hyper efficient polarizer and a unique beam splitter into a thin film.
How It Works
PGs diffract incident light into two beams in the ± first orders (no higher order diffraction), with the output beams having opposite circular polarizations. The diffraction angle is determined by the design of the film. Polarized incident light diffracts completely into a single + or – order.
Technology Comparison
| Traditional Grating | ImagineOptix PG | |
|---|---|---|
| Thickness | 100-200um | 2-4um |
| Order | Multiple Orders | +/-1st Order Only |
| Spectrum | Limited to Narrow Spectrum | Can be tuned for Narrow or Broadband |