Specification

Number of Layers in Waveguide

One to three FOV gratings per waveguide

Waveguide Thickness

Min 0.4 mm per waveguide

Typically <0.05 W/mm2

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)

Biometric Scanners

 

DigiLens has developed an ultra-thin waveguide based digital scanner reference module for biometric fingerprint and eye tracking applications. The fingerprint scanner is compact, transparent and high-resolution; ideally suited for integration within a smart tablet or capturing multi-fingerprint images fully compliant with NIST 500-288 and FBI standards. Four finger “hand slap” is biometrically stronger than the single fingerprint sensors now incorporated into mobile phones.

A customizable, thin form factor, high transparency eye tracker has also been tested for seamless integration into AR and VR eyewear. Originally developed for USAF, the DigiLens eye tracker overcomes the image processing complexity and consequent latency of typical camera based eye tracking systems. Combining our optical waveguide hardware design results in less software processing, enabling higher frequency tracking, reduced latency and greater overall accuracy.

This new class of tracker is so fast – it is able to support “eye slaved” menu selection and user interaction for wearable displays. For VR simulation and training, 3D convergence and foveal graphics rendering can greatly improve user realism and motion sickness reduction.