Technology Comparisons

ImagineOptix is leading the future of optics.

See how we are solving many of the shortcomings of current technology being used.

Bragg Polarization Grating (BPG)

Traditional Optics Compared to ImagineOptix BPG

BPG – Tech Comparison (AR/VR)

Parameter Bragg PG Holographic Surface Relief
Field of View (FOV) 60° 19° 17.5°
Wavelength Range Tunable for Narrow or Wideband Narrowband Wideband
Total Waveguide Efficiency Up to 90% 15% 15%-20%
Grating Thickness d ~2 µm >100µm >100µm

Bragg PGs Have:

  • Lower cost than holographic or surface relief
  • High scalability for volume manufacturing
    • Simple replication process
  • High Uniformity
    • Output efficiency can have gradient
  • Very Low Haze
    • In noise floor of detector

Current Performance Specs

  • Sub-wavelength grating periods for all VIS
    • Current: 312nm
    • Development target: 275nm
  • On axis performance for wave-guiding

BPG – Tech Comparison (Telecom)

Parameter Bragg PG Reflection (Blazed) Transmission (Blazed)
Angle Range Wide Narrow Narrow
Peak Efficiency Up to 95% 70-90% 70%
Grating Thickness d ~2 µm >100µm >100µm

Bragg PGs have:

  • Lower cost than holographic or Blazed/Ruled
  • High scalability for volume manufacturing
    • Simple replication process
  • High uniformity
    • Output efficiency can have gradient
  • Very low haze
    • In noise floor of detector

BG – AR/VR Comparison Conclusions

  • Image Quality
    • Vive: worst image quality
    • Hololens & IO AR/VR: above average
  • Size & Weight
    • IO: less than half the weigh of the Vive & Hololens
    • IO: compact like a pair of sunglasses
  • AR/VR Capable
    • IO: only one with both AR & VR capability

Geometric Phase Lens (GPL)

Traditional Optics Compared to ImagineOptix GPL

Parameter Traditional Lens ImagineOptix GPL
Thickness 5-6mm <0.5mm thick
Weight 4-6g <1g
Aberrations Multiple (Spherical, Coma, Astigmatism, etc.) Aberration Free
Lens Type Limited to fabrication capabilities Any lens type or profile
Focus Primary Only Both Primary and Conjugate
Manufacturing Can be expensive and difficult to manufacture (grind, polish) Simple manufacturing process gives low cost and rapid prototyping
Chromatic Dispersion Positive Negative, used for correction

Polarization Grating (PG)

Comparison image of current holographic grating optics to ImagineOptix Polarization Grating

Polarization Conversion System (PCS)

Parameter Traditional PCS ImagineOptix PCS
Conversion Efficiency 55-65% 75-85%
Number of Components 4 elements Single monolithic element
Spectral Characteristics Need multiple alignments in assembly Easily added to existing designs
Change in Etendue More than double Increase only 50-75%

Multi-Twist Retarder (MTR)

Parameter Traditional Retarder ImagineOptix MTR
Retardation Values ¼λ, ½λ ¼λ, ½λ, fractional
Patterning No Multiple Domains (any pattern)
Color Filter No Chromatic
Wavelength Narrow, Achromatic Narrow, Achromatic, Super-Achromatic (400-4000nm)
Thickness 100um-3mm 2-4 µm
# of Films Multiple Layers/Plates 1-3 Layers
Manufacturability Complex Simple Fabrication
Cost $$-$$$ $

Vortex Patterned retarder (vpr)

Parameter Traditional Vortex Retarder ImagineOptix VPR
Thickness 1-4mm thick <0.5mm thick
Wavelengths Limited Can be tuned for any wavelength from 400-4000nm
Charges Limited to two charges (m=1,2) Any charge is possible (m=1,2,3,4,8,16,32)
Manufacturing Complicated mastering, therefore expensive Simple manufacturing process gives low cost and rapid prototyping
Cost Can be expensive and difficult to manufacture (grind, polish) <$500

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