Specification

Number of Layers in Waveguide

One to three FOV gratings per waveguide

Waveguide Thickness

Min 0.4 mm per waveguide

Glass or Plastic covers required for safety purposes

Optical Efficiency

Peak efficiency:  95%

Optical Transmission

98% at normal incidence for a basic waveguide layer

Angular Operating Range

Typically 5-25° bandwidth per waveguide layer

Haze

0.1% – 0.4% / Layer – Thickness Dependent

Light Source Compatibility

High efficiency over 20-50nm for Laser and LED only

Polarization

Polarization selective

Wavelength Response

Waveguides can be designed for 440nm – 1550nm

Switching Speed

Typically 40-400µs for current applications

Power Consumption

Typically <0.05 W/mm2

Environmental

<1% performance variation over 0-55C temperature range

Life Expectancy/MTBF

10,000 hr (room operation)

10,000 hr  storage (85C / 85RH)

Volume Supply

ISO9000, AS9000 (Aerospace Design & Manufacture)

Reliability

Batch tested to 5000 hours ( 85C/85RH accelerated life test)

Head-Up Displays

 

With the introduction of the DigiLens enabled HGS 3500 Head-Up Display from Rockwell Collins, waveguide optics have now begun to replace bulky projection-type HUDs used in aircrafts and automobiles. This is a game changing precedent for an application that has driven HUD development for thirty years. The HGS 3500 waveguide combiner is being manufactured by DigiLens for a range of small jets, and we hope it will eventually replace all projection based HUDs.

The wide field of view waveguide HUD, is smaller, lighter and cheaper, allowing the industry standard overhead projector to be eliminated from highly valued cockpit space. Automobile HUDs are also gaining driver popularity; with increased adoption in a broad range of models. By virtue of improved efficiency and waveguide optical magnification (Exit Pupil Expansion), the DigiLens solution can be miniaturize or increase a display size in a miniaturized component, saving auto manufacturers both cost and premium dashboard space.