Development of a Headlamp Mist Resistance Evaluation Method

To establish a method of evaluating the misting of headlamps, mist generating mechanisms were investigated, misting factors were determined, and the combined effects of various misting factors were examined. Based on these results, we developed misting evaluation equipment capable of reproducing the headlamp environment conditions (i.e., temperature, humidity, wind direction, wind velocity) in bench tests, and established a mist resistance evaluation method characterized by favorable reproducibility.