Why is there a black vertical stripe on the side mirrors of the car?.
With flat mirrors, everything is more or less clear – these were installed on the lion’s share of domestic cars and foreign cars several decades ago. Those who are younger and not in the know should take a look at retro-"burdock" "Volg", "Muscovites" or "Lada". The main advantage of flat mirrors is the display accuracy.
They do not distort the distance to objects, respectively, we have an accurate idea of the situation overboard.
But exact does not mean complete. As you know, a serious disadvantage of flat mirrors is "dead" or "blind" zones. Since the viewing angle of the flat mirrors is frankly small, when changing lanes, it is easy to miss the car, crouching on either of the flanks at a short distance.
No wonder that in Soviet-era driving schools, drivers were taught to turn their heads at every maneuver, like a fighter pilot.
In turn, spherical mirrors have a noticeable bend, due to which objects in the reflection move away, and the inscription Objects in mirror are closer than they appear often informs about this. In other words, more can be seen in spherical mirrors, but it is more difficult to control the distance..
As a rule, the right outside
mirror is made more convex than the left to maximize the view from the hard-to-see side. For insurance in cars with spherical mirrors, the salon mirror is almost always made flat and is a kind of measure and reference point. In such salon mirrors, only the rear window falls into the field of view, which is especially useful when driving at night, when lights, headlights and other light objects are excluded from the view. "stern".
Finally, aspherical mirrors are as convex in shape as spherical ones. However, they have a larger bend angle at the far edge of the mirror for the driver. Finally, it is interesting that very many models of aspherical mirrors have a black vertical strip dividing the mirror element into two unequal parts.
Surprisingly, many do not know why such a "marking". Some, for example, are convinced that thread graphics are an element of a heating system or a design or technological element..
In fact, everything is much simpler. Such mirrors, divided into zones A and B, relatively speaking, are hybrids. The part of the mirror closer to the side has minimal bending for more accurate distance estimation.
On the other hand, the fragment removed from the side is bent as much as possible to reflect, relatively speaking, a larger area of the road, almost completely removing the dead zone. Black vertical marks the border between the sphere and the flatter part of the mirror.
By the way, when setting up aspherical mirrors, many drivers make mistakes, stealing useful information with their own hands. Correct adjustment is to fix the mirrors in such a position that the driver can see the road in the rear in the mirror, but not the sides of his car..
Note also that novice drivers often use additional mirror elements – for example, panoramic stickers (most often they are a round convex mirror element that is glued to the main mirror to create a local panoramic picture). Such mirrors-"sandwiches" indeed in some cases may be useful. The same can be said about the installation of another set of mirrors that duplicate or supplement the main ones.
Such "looking glass" can often be seen at "heavy trucks" and cars of novice drivers.
Finally, the most advanced solution is a modern blind spot monitoring system, when LEDs are integrated into the mirror elements or mirror housings, which light up when approaching from the rear of a passing vehicle. Finally, in some modern models, a picture from a side-view camera (usually the latter is installed in mirror housings) is broadcast on the dashboard or as an icon projected onto the windshield.