Laser pointer with fixed focal length

This laser pointer has a fixed focal length and uses an 18650 capacity battery, so there's no need to worry about the battery life of these lights. At the same time, the laser light source has high brightness and long service life, which greatly reduces the maintenance cost of the latter. At the same time, the laser projector starts almost instantly and reaches the working brightness in an instant, so the laser projector is considered to be a kind of fast switch machine. Aiming at an aircraft with a laser pointer is not only illegal, it is also extremely dangerous for the pilot of the aircraft. Even if you're sure you're pointing at a star, it's better to circle the object with the high power laser pointer instead of pointing at it. Powered by battery. As a result, red light gradually forms, which is greatly amplified by being reflected again and again between the two mirrors. On the front end, at the touch of a button, the desired red laser appears, which is only one wavelength, strong beam and high intensity compared to incandescent light.