The rearview mirrors are respectively arranged with external rearview mirrors, rearview mirrors and rearview mirrors. To use separately, the exterior rear-view mirror responds to the rear side of the car, the lower rear-view mirror reflects the front lower side of the car, and the inner rear-view mirror reflects the rear of the car and the interior environment. There are different uses, mirror layout will be different.

As usual mirror mirrors, there are two important, one is a plane mirror, as the name is the same as the mirror is flat, with the term expression is "the radius of curvature of the outer surface R infinity", which is the same as the usual home mirror, available and Visually similar images, rearview mirrors such as car mirrors are often used as interior mirrors. The other is a convex mirror, the mirror is spherical, with a radius of curvature of difference in size, this image is smaller than the visual, but the field of vision is large, like the role of the camera "wide-angle lens", the convex mirror of the car rearview mirror Commonly used as exterior mirrors and lower rearview mirrors. Passenger cars and other light passenger vehicles usually have exterior rearview mirrors and interior rearview mirrors.

Large commercial vehicles (big buses and large trucks) usually install external rearview mirrors, lower rearview mirrors and inner rearview mirrors.