Headlight Beam Pattern Evaluation Customer to Engineer to Customer

A method for communication linking the vehicle user and the lighting engineer has been developed to improve the headlight beam pattern development process. A technique called the semantic differential has been used to quantify the user's perception on a large number of attributes of the beam pattern. The basis of the technique utilizes descriptive words used by both drivers and engineers to characterize headlight beam patterns. Beam pattern evaluations conducted in a series of dynamic drive situations formed the initial data base. Subsequent evaluations using this technique have facilitated close and quick interaction between the customer and the engineer during the development of headlight beam patterns.