Car rearview mirrors are mainly divided into three types: interior rearview mirrors, exterior rearview mirrors, and under-view mirrors, each with distinct mirror structures and functions. The interior rearview mirror is usually mounted at the centre above the windshield, featuring a plane mirror design that clearly reflects the overall situation behind the vehicle, facilitating observation of the rear traffic flow or the status of passengers inside the car. Exterior rearview mirrors are located near the A-pillars on both sides of the vehicle body, mostly using convex mirrors or dual-curvature mirrors. Convex mirrors can expand the side and rear view but slightly distort the image, while the dual-curvature design maintains true imaging through the inner plane mirror and widens the view with the outer convex mirror, effectively balancing observation accuracy and range. Under-view mirrors are used to observe the road conditions directly in front and below the vehicle, commonly found on large commercial vehicles, helping to avoid chassis scratches. Proper adjustment of rearview mirrors is crucial; for example, the interior rearview mirror should have the horizon placed in the centre of the mirror, and the exterior rearview mirrors need to retain a 1/4 body proportion to balance environmental observation. In addition, rearview mirrors with special functions such as anti-glare and wide-angle can also improve driving safety at night or under complex road conditions, and drivers should choose the appropriate mirror type according to actual needs.
