The Abbe number measures chromatic dispersion in optical materials. A high Abbe number means the material has low dispersion, meaning it keeps light rays focused together. A low Abbe number means high dispersion, which splits light into a rainbow effect (chromatic aberration). In automotive optics, it is critical when designing headlamp lenses and camera sensors for ADAS systems. High Abbe number materials prevent color fringing, ensuring lane detection cameras see clear, sharp borders.
Mechanic Glossary
Abbe Number
A measure of a transparent material's light dispersion, indicating how much the material separates light into its component colors.
Frequently Asked Questions
A value that describes how much a lens material scatters light into different colors. A higher number means less color scattering.
It helps engineers choose lens materials that prevent color fringing (chromatic aberration) on safety cameras used for lane keep assist and signs.
Crown glass has a high Abbe number (around 60), while flint glass has a lower number (around 30 to 40), causing more dispersion.