Advanced driver assistance systems (ADAS) provide the driver with information on road hazards and conditions to prevent collisions. Some of the ways this system can prevent traffic accidents is with features like:
- Adaptive cruise control
- Lane departure warnings
- Traffic signal recognition
- Forward collision warning
A windshield mounted camera near the rearview mirror is one key sensor in ADAS, however windshield curvature can cause imaging distortion. Having a mathematically precise understanding of the distortions is essential to correcting them in the ADAS algorithms.
At Lumetrics, we measured both windshield distortions and the curvature of six ADAS capable windshields. The CLAS wavefront measurement system quantified the level of distortion across the 20 mm ADAS area of a windshield at about 0.2 Diopters. Further, by using the Lumetrics OptiGauge II, we measured the curvature of the windshield in the area of the ADAS revealing a 2.270 meter radius of curvature in the vertical direction and a 12.573 meter radius of curvature in the horizontal direction.
LEARN MORE IN OUR Adas windshield measurements white paper.