Lasers are used for a variety of purposes, including pointing out objects during demonstrations, aligning materials on construction sites and homes, and doctors performing cosmetic and surgical procedures. Some lasers emit radiation in the form of light. Others emit radiation that is invisible to the naked eye, such as ultraviolet or infrared radiation. Generally speaking, laser radiation itself is not harmful and behaves very similar to ordinary light in its interaction with the body. The laser can be emitted in the form of a compact beam that does not become larger at a certain distance from the laser. This means that there may be the same degree of danger near and far away from the laser. Looking at the market, we can find that different forms of light sources have achieved development in different fields. For example, traditional light bulbs are currently applicable to a wide range of markets and still account for a large portion, while commercial and residential areas occupy a small portion. The used projector remote control with laser pointer source can be ultra-high brightness, suitable for professional and engineering fields such as digital cinema, LED light source is mainly used in entertainment projection equipment, mini notebook computers and other fields.
The irradiation point of the high powered laser pointer depends not only on the output power and apparent brightness of the laser reflected from the surface, but also on the color version of the human eye. For example, the human eye is most sensitive to wavelengths in the visible spectrum from 520 nm to 570 nm, but less sensitive to red and blue laser wavelengths. Therefore, the 532 nm green laser is brighter than other color lasers with the same output power. Technically? It is possible to go to the end of the universe (there is such a thing). But in reality, it depends on the laser pointer. Nowadays, some foreign "laser pointers" are powerful, just like lightsabers, as you can see, dust particles scattered in the atmosphere. Most laser pointers produce milliwatts of power, which if very collimated, is very useful for driving miles.