Fraunhofer Institute for Applied Optics and Precision Engineering IOF
Head-mounted displays (HMD) with see-through function are key components for the use of augmented reality. Important components of an HMD are a micro display and HMD optics.
The Fraunhofer IOF has developed a free-form prism for use as HMD optics.
Optical parameters
- Small and light optics
- Low f-number
- Large visual field of 32 x 24 degrees
- VGA resolution
- Distortion < 2 %
Procedure
- Optical design using raytracing
- Rapid prototyping
- FEM simulation
- CAM system
Production
- Diamond turning and planing in PMMA on a Precitec FF700 ultra-precision free-form machine
- Measurements using tactile measuring system