Click here to learn more about our Geometric Phase Lens (GPL) Diffuser

Technical Details

SPECIFICATIONS

  • 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

BENEFITS

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.

Principle:

  • Structure is nonlinear orientation angle
  • Phase = 
  • Phase can be aspheric, aberration corrected, or any function
  • Polarization selects ± focal length
  • Broadband
  • Real transmittance into Obj + Conj beams ~99% !
  • If RHC input, all is focusing 99.4%
  • If LHC input, all is diverging 99.2%
  • If other, both waves are present

Additional Applications for Geometric Phase Lens

FAQs about Geometric Phase Lens

Q. What type of diffusion patterns can you implement?
A. Typically, the diffusion pattern is circular, but we can do rectangular and other arbitrary patterns.

Q. Do your diffusers require an airgap like other engineered diffusers?
A. No. Since our diffuser films are flat, they can be laminate to other films and between multiple elements/films.

Q. Can you maintain polarization when passing through your diffuser?
A. Yes. As long as the input polarization is not random it will remain polarized. Depending on the design, the polarization may be flipped.

White Papers about Geometric Phase Lens


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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?