What laser is banned inUSA?

OF week laser network news: BMW Audi compete each other for many years, in the past decade, it’s compete including the development of laser light source. In 2009, BMW's engineers outline the initial viewpoint for the laser headlights, and hope to bring technology to show off the capital. This idea was formally established in 2010, after a year, the public began to be sought after. Audi noticed, and started the same project.

For example 2015 of the Audi Limited Edition LMX R8, as well as the I8 series with laser headlights, you will be able to understand what is caused by a pair of laser headlights campaign.

Yet the laser light source only won the market in European, but not that inUnited States

In the United Statessales of I8 and R8 must be equipped with LED headlights, as theUnited Stateslaw does not allow more than 150000cd of headlight illumination brightness. But inEurope, when you read this article, people are using a laser light to illuminate the road, car headlights brightness can reach 430000cd, equivalent to a classroom lighting standard brightness. And in theUnited States, even a pair of good halogen headlights can reach 162500cd, so that xenon lamp and LED lamp do not have priority, the installation of laser light does not have enough benefits.

However, the laser headlight is more efficient, and can achieve a greater degree of freedom of design with only a very small light emitting element. BMW and Audi are using tiny laser diodes, which can emit blue light. Phosphorescent coating films will be blue correction into white light, and through the headlight assembly formed close beam, which will now illuminate farther than any other xenon and halogen lights.

The laser light is so bright, for that be optional component inEurope. I8 and R8 both have normal LED light function. If the speed less than 60 km / hour, laser lights will be shut down, also it is equipped sensor with precise calibration, which can prevent dazzling other drivers.
       

When you happen to a car came head-on towards, the other side can only feel the brightness of the LED lights; the sensor will prohibit the use of laser light signal. But when there is no other vehicle on the road, the laser light turn on, and the effect is striking.

"This is very difficult to measure with a light tunnel," said Huhn Wolfgang, an Audi engineer, "Because the light range of the laser is too far away".