Imaging principles of ordinary rearview mirrors and electronic rearview mirrors

The principle of ordinary rearview mirrors is: the angle between the light rays perpendicular to the convex mirror is fan-shaped outward, so that the more distant objects are reflected in the convex mirror with the fan-shaped angle. The virtual image will become smaller. In this way, the convex mirror can accommodate more distant scenery, so rearview mirrors are generally convex mirrors.

Principle of electric rearview mirror: The rearview mirror is equipped with two micro motors. The control buttons installed on the dashboard can be used to drive the motor to drive the rearview mirror to swing up, down, left and right. The structure of the electric rearview mirror: It is mainly centered on the pivot axis and consists of two independent micromotors, permanent magnets and Hall ICs that enable the rearview mirror to flexibly change positions in up and down and left and right directions. The rearview mirror is controlled by a switch and can move in multiple directions, allowing one micromotor to work or two to work simultaneously. Nowadays, in mid-to-high-end cars, the rearview mirrors can basically be folded. There are two folding functions: one is manual. When folding is needed, the driver must put his hands out of the window or get out of the car to fold. This kind of folding rearview mirror There are very few mirrors now; the other is electric, which is also a more common one. Its advantage is that the driver can fold it in the car, and the rearview mirror will automatically open when starting the vehicle.