Now, a new study published by a team from the National Institute of Standards and Technology (NIST) attempts to estimate the actual number of injuries people have suffered from using such devices. This study, led by Charles Clark, describes the nature of the problem and details experiments using cheap webcams that can detect excess infrared light from a green laser.
Mine is a green Laser pointer. I just arrived today. When the battery is charged, it will be bright when the switch is pressed for ten seconds, but it will slowly dim after ten seconds. In the end, the light beam can not be seen. I saw that a small green dot on the wall was still very dark, and it was only about stopping it for a while to restore the brightness, but after a few seconds it was dark again. I have never used a laser pointer. Is this normal or abnormal? Is it because the laser pointer can't work continuously, but only ten seconds is too short. It is said that it can fire a fire, but it will be out of light in a few seconds.
Obviously it is overheating. Most of the cheap green laser flashlights on the market have poor heat dissipation performance, and the heat generated by green light is inherently large (808nm infrared laser diode + laser crystal + constant current drive circuit board heat, Crystals are especially true), and the green laser is the laser crystal, and the crystal is greatly affected by the temperature. If the temperature is too high or too low, it will be abnormal, and it will be much darker.