Polarization Conversion System 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
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
