Method of Lamp Fogging Discrimination

Abstract

This paper discussed the mechanism of internal fogging in automotive lamp based on the principle of water vapor condensation, and put forward the concept of the critical fogging humidity of lamp according to the structure and engineering characteristics. It given out a simple way to judge lamp fogging on the base of lamp temperature field, and verified the existence of the critical fog humidity by the test. All of these are very meaningful on the evaluation of the lamp's structure and raise the level of lamp design