Features of the green laser pointer

The wavelength of the light emitted by the green laser pointer is 532nm, which belongs to Class IIIA. The light of the green laser pointer is a bit objective and dangerous to the eyes. The higher the output power, the more dangerous. Generally, 5mw works well. The US market accepts 5mw laser pointers, but above 5mw, special approval is required. Please be careful when using it. Please do not shoot into the eyes or easily injured places. And you should also prevent the laser light from entering your eyes due to reflection. In the field of video surveillance, lighting devices for supplementing light at night have been widely used. However, since most of the lighting devices for supplemental light have a fixed illumination angle, if you want to use the camera to observe a certain distance of the field of view in the case of low illuminance, the viewing angle of the supplementary light device will be insufficient, and the observed field of view will be blurred. Unclear situation.

Principle of laser emission

The key components are weak and the pressure resistance is weak. If you damage the electrical system, you must dispose of all flashlights. Therefore, the stability and reliability of the circuit are very important. Use a blue-violet green laser pointer diode with a wavelength of 405 nm. It is a semiconductor laser. Close to the ultraviolet band, visibility is low, but it can excite fluorescence, and has functions such as currency verification and chemical inspection. In fact, the laser is not mysterious. Its simplest principle is to take light into a resonant cavity composed of two mirrors. As the beam reflects back and forth, the light is continuously strengthened in the resonant cavity, and the wavelength becomes single. A small hole comes out, which is the laser we see every day.