What is a line in the rearview mirror?

Automobile rearview mirror is a very important automobile part, such as changing lanes and reversing. Driving without rearview mirror will make you feel insecure, in other words, you can't drive at all. I don't know if you have noticed. What is the line on the rearview mirror? With this question, let's read the article together and see what is going on. At present, there is a vertical line on the rearview mirror of many vehicles, and some owners who don't understand this aspect think that there is something wrong with the rearview mirror. In fact, this vertical line is not only a problem with the rearview mirror, but also a great help to our driving safety. It can be said that it is a high-end rearview mirror.

In fact, automobile rearview mirrors are also classified, and the rearview mirrors with black lines are hyperboloid lenses. A double curvature lens means that the lens has two curvatures. The lens near the cab 2/3 is a smooth curved surface. The 1/3 lens outside is a convex mirror, and the lens near the cab is actually no different from the ordinary lens. The biggest difference between the double curvature lens and the ordinary car rearview mirror is that it is on the outer 1/3 lens, which can make the driver's vision wider and make it easier to find the vehicles coming from behind.

Using a double curvature lens, we can observe the situation in the distance and near at the same time, and reduce our blind spots. Of course, not all cars use hyperbolic lenses, so some owners of ordinary rearview mirrors will install a small disc for their cars.

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