The "strange mirror" you mentioned usually refers to the convex rearview mirror used in cars. The inner section of the dual-curvature mirror is flat for accurate distance judgment, while the outer section is convex to expand the field of view and effectively reduce blind spots. Additionally, the curb-view mirror (installed under the front bumper) is also predominantly convex in structure, facilitating observation of obstacles near the front wheels. As an emerging technology, digital rearview mirrors replace traditional reflective surfaces with camera-display systems, delivering more stable images during heavy rain or at night, though their adoption remains constrained by cost. All rearview mirrors must meet safety standards to ensure drivers can adjust angles according to practical requirements. For instance, side mirrors should frame the vehicle body within 1/4 of the mirror surface while allocating 2/3 to the road view, thereby balancing field coverage with distance perception accuracy.
