Polarization Conversion System

What is a Polarization Conversion System?

The PCS is a low cost, compact, monolithic component that polarizes up to 90% of incident light, allowing new levels of freedom in optical design and efficiency.

We make the worlds most compact and highest efficiency PCS.

How it Works

ImagineOptix PCS solutions use thin film polarizing beam splitters (ultra-efficient GPH films) to separate a single incident light beam into two beams with opposite circular polarizations. Our patented MTR film then converts one of those polarizations to match the other polarization. The output is up to an astounding 90% of light in the desired polarization state.

PCS Structure:

  • No air gaps between elements
  • Cross-section is along the long direction of the lenslets
  • Diffraction occurs within the plane of figure

Traditional PCS

  • 55-65% Conversion Efficiency
  • 4 Elements and Multiple Assembly Alignments
  • Doubling of a Etendue

ImagineOptix PCS

  • 75-85% Conversion Efficiency
  • Single Monolithic Element
  • Only 50-75% Increase in Etendue

Technical Details


  • Maximum Dimensions: 100mm x 100mm
  • AR Coating: Typical BBAR (430nm – 650nm), custom AR available (both narrow and broadband, IR available as well)
  • Efficiency: 70% – 90% Correct Polarization Transmittance (CPT)
  • Typical Cost: Individual samples at $80, volume pricing available
  • Designs: Custom & standard designs available
  • Total thickness >3.5mm
  • Few mm sq or larger
  • Lenslets size 0.1852 mm
  • Ideal Efficiency (lumens)
    • Total: 81%
    • Primary wave:90%
    • Conjugate wave: 72%


Our PCS offers an unparalleled combination of size, cost and efficiency:

  • Our stack of elements and films come pre-assembled into a single compact component, as easy to use as a typical lens.
  • Has a much more compact form factor than other solutions and can be less than a few dollars in high volume.
  • With up to 90% conversion efficiency, our PCS save space, money and power throughout an optical system.
  • Additional Information

    The PCS was originally designed to enable the world’s smallest, lowest cost and most efficient pico-projectors and for edge-lit and direct-lit backlight units. The GPH film combines the features of a microlens array and a PG film. A typical PCS feature is a completely flat outer surface and an extraordinarily thin design, making the PCS ideal for inclusion in stacks of closely fitted optical elements. Microlens arrays both split the light based on polarization and provide homogenization of the output light for added color and brightness uniformity. These act similarly to a Fly-Eye-Lens.

    • High efficiency
    • Ultra-thin, flat component
    • Less alignment required
    • Easy fabrication
    • Cost-effective

    The following design spec of the optical components and the spacing were determined by the TracePro simulation.

    Performance Summary

    • Zemax modeling
    • Ideal conversion efficiency 81%(from unpolarized to linear polarized, RGB)
    • Estimated prototype efficiency 75%
    • 1.5 mm thick, arbitrary area
    • Design parameters can be optimized for specific system



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