We may not have seen the sight, and many people will be curious to ask how the laser sight can achieve accurate aiming. What is the principle? Let's take a look at it together.

The core of the laser sight is a low-power laser diode. Generally red light (such as 635nm or 650nm band) or green light (usually around 520nm). The light emitted by the laser diode is collimated by a set of optical lenses to form a very thin and straight beam, and then the direction of this beam is aligned with the shooting direction of the barrel through the adjustment structure.

The "red dot" or "green dot" you see is actually the light spot reflected from the laser irradiation on the target surface.

To put it bluntly, it is equivalent to drawing an "extension line of light" for you, so that you can directly see the direction pointed by the muzzle with the naked eye. Traditional sight needs you to aim at the sight, illuminate the door, and then aim at the target, which is time-consuming. With the laser sight, as long as you see the light spot falling on the target, you can basically aim.

However, the laser does not follow the real trajectory of the bullet, but goes out along a light almost parallel to the barrel. Therefore, during installation, it is necessary to make the laser spot coincide with the actual trajectory at a specific distance through fine adjustment.

For example, if the adjustment distance is 25 meters, the laser spot and the bullet drop point almost coincide at 25 meters, but after this distance, the bullet will fall due to gravity, and the laser spot will be "higher".

This is why some high-precision shooting will use adjustable laser sight, which can fine-tune the laser emission angle up, down, left and right.

There are usually two ways to install the laser sight: one is to install it outside the gun body, such as below or at the side of the sight, and adjust the direction through a fixed bracket; The other is the "built-in laser sight" directly installed in the center of the rifling, which has higher precision and is often used in high-end equipment or experimental guns.

In addition, many civilian laser sights are now equipped with infrared lasers (such as 850nm and 940nm), which are invisible to human eyes, but with night vision devices, the light spots can be clearly seen in the dark. This infrared laser aiming technology is actually the laser diode system I am familiar with, but the band is selected in the infrared region.

The laser sight emits a collimated beam of light through the laser diode, and through the optical system and mechanical adjustment, the beam of light is made to be consistent with the direction of the barrel, and then it hits the target to form a light spot, thus realizing rapid aiming.

It is not a device that "automatically corrects" shooting, but an intuitive visual aid that allows you to "see" the direction you are aiming at.