What is the black line on the left rearview mirror of an Audi car?
1 Answers
The black line on the left rearview mirror of an Audi is actually a dual-curvature mirror, which helps reduce blind spots and improve driving safety. Below is an explanation of the specific functions and technical principles of dual-curvature mirrors: Functions of dual-curvature mirrors: They provide a wider field of view, which is particularly useful during high-speed driving, allowing for better observation of the vehicle's surroundings. At lower speeds, they make it easier to judge the vehicle's position. The combination of these features reduces rear blind spots. This is because the mirror uses a dual-curvature lens, meaning one lens with two curvatures. The inner two-thirds of the mirror uses a flat surface, while the outer one-third uses a convex surface, separated by the black line to help the driver see behind more clearly. The convex portion is used to observe areas farther to the side of the vehicle, reducing blind spots and doubling the field of view during turns, almost completely eliminating blind spots. Technical principles of dual-curvature mirrors: Based on three factors—vehicle model, the driver's eye position relative to the mirror, and visibility requirements—optical principles and data methods are applied to select different curvature radii for various viewing angles around the vehicle, with smooth transitions between them. This approach expands the field of view and reduces blind spots while maintaining minimal distortion, meeting national mandatory standards and addressing blind spot issues. Additionally, the mirror design uses a dividing line to alert the driver that the curved portion is only for observing the general situation behind the vehicle.
