What does luminance of a beam source mean?

Luminance describes how bright the human eye perceives luminous or illuminated surfaces. The unit of measurement is candela per square meter (cd/m²).

  • If we look into the midday sun with its luminance of 1,600 x 106 cd/m², we risk serious eye damage, while at 2,500 cd/m², the sunlight reflected from the moon is gentle on the eyes. However, staring into an opaque 60-watt light bulb (~ 120,000 cd/m²) is unpleasant.
  • Depending on the manufacturer, the luminescence of a laser high beam is between 600 and 1,000 cd/mm²—n other words, 600 million to 1 billion cd/m². The high dazzle effect for other road users is specifically prevented with the help of camera-based control systems.

Laser high beam in the new Audi A8

Reaching your destination safely with laser high beam

Lasers can increase visibility during night driving to up to a kilometer. Laser-based light technology for vehicles is gathering pace.

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