Car lights dazzle when it rains

Carnegie Mellon University (USA) has developed a smart car that can predict the location of rain drops, thereby adjusting the light rays so that the driver does not get dazzled.

The new lighting system consists of a digital projector, a camera and a beam splitter. The camera captures the images of the raindrops so that the microprocessor calculates the trajectory and determines their dropping position, and then sends the signal to the projector. At that point, the projector automatically switches off the beam of light emitted. corresponds to this position. The entire process takes place in 13 milliseconds.

As a result, the car's light output will decrease slightly, but it can reduce glare when the light is reflected by rain or snowflakes. Experiment shows that the system works better when moving at slow speed. In heavy rain, the success rate is 79% when traveling at 30km / h. At 100km / h, the success rate is 20%.