What is 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.

Line Art drawing of PG lens
Imagineoptix lens

Technology Comparison

Traditional GratingImagineOptix PG
Thickness 100-200um 2-4um
Order Multiple Orders +/- 1st Order Only
Spectrum Limited to Narrow Spectrum Can be Tuned for Narrow or Broadband

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Additional Applications for Polarization Grating


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Some Questions to Consider

These are typical questions we like to ask when engaging you as a customer to help best assess and understand your needs and challenges.

  • What are the key issues with your current solution?
  • Describe the major optical challenges you are facing. Is it low efficiency? Is there a unique polarization? a difficult phase profile to work with? or something else?
  • Are there specific technology features (i.e., diffraction, polarization, retardation, wavefront, focus, opto-electronics, other) that you are interested in?
  • What are the characteristics of the light source you need to work with (i.e., polarization, bandwidth, collimation, intensity, coherence)?
  • What are the desired characteristics of the light at the output of the system?
  • Are there any specific tests, experiments, or prototypes that would best validate a solution for your problem?
  • What is the timeframe within which you need a demonstrated solution?
  • Are there any unique or challenging form factor requirements? Thickness requirements? Large active area requirements?