A laser sight is a device that shoots a laser at a certain target. It is often used within many military applications, especially with guns. Basically, the laser sight is a visible laser light that allows the shooter to see where the bullet will hit. It is located (or structured to fit) above the body of the small arm at a precise angle facing down, so that the laser will point directly at the spot where the bullet will most likely hit. However, as with all devices, the laser is often slightly off, although this difference is highly negligible. Most of these laser sights use what is known as a red laser diode. Because a laser beam has a low divergence, the beam itself will be visible as a small spot even at very long distances. Thus, this red laser would be visible. Some use an infrared diode to shoot a beam (or a dot) that is invisible to a naked human eye; it can only be seen with night vision enabled devices.

In the late 1990s a laser equipped with green diode pumped solid state (DPSS) laser sights (of size 532 nm) were commercialized and began to be widely used. Later in 2007, LaserMax, a company specializing in laser for military uses, began to mass produce green lasers for small arms, which is now the most widely used laser sight today, as the green is more visible than the red in bright lighting conditions.

Laser Sight