Geometric Phase Lens (GPL) Diffuser Technical Details


  • Net Transmittance: 80%
  • Diffuser Region Efficiency: ~90%
  • Thickness:
    • Static: <0.5mm
    • Dynamic < 2mm
  • Smallest Grating Period: <2um at edge of diffusion GPLs
  • Dynamic diffusers
    • Typical LC switching speed: ~2.5 ms 
  • Size: Up to 300 x 300mm sq
    • Round or arbitrary cut samples are custom
  • Patterning: Any lens/array shape possible
  • Larger custom sizes are available with additional NRE


Because of their radically different fabrication, GPL diffusers offer:

  • Both static and dynamic operation
  • High efficiency
  • Can be integrated/laminated with other components
  • Both narrow and wide diffusion angles are possible
  • Dynamic diffusers switch at typical LC switching times
  • Can work with any input polarization

Additional Information

GP Lenses can be used in combination with refractive lenses, for ultra compact systems, and/or for chromatic aberration correction. Complex phase profiles can be made, much more easily than traditional diamond turning. Microlens arrays may be square, rectangular, or hexagonal, and lenslets may have radically different focal lengths. While transmission GP Lenses are most common, they can instead be made on mirrored substrates achieving reflective –mode.


What type of diffusion patterns can you implement?

Typically, the diffusion pattern is circular, but we can do rectangular and other arbitrary patterns.
No. Since our diffuser films are flat, they can be laminate to other films and between multiple elements/films.
Yes. As long as the input polarization is not random it will remain polarized. Depending on the design, the polarization may be flipped.

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