A hole burned out and soon started smoking.Laser pen is widely used in daily work and life. It can be used as an indicator when PPT is declared in class, a marker for accurate display of buildings from a great distance and a craft for people, The high-performance laser pen ignites flames and causes fire. Furthermore, the laser pen cannot be directed directly at people's eyes, Someone experimented with laser weapons. At that time the power of the laser pen used in the experiment was 200 MW. Then tested with clothes or irradiated a piece of cotton clothing with the same Green laser pointer.

The same Laser pointer was irradiated on a piece of cotton cloth, where the laser went, the smoke started to smoke, and a hole was burned for a while, and the laser's power is so high that it can even light matches and cigarettes. The thermal effect of laser sleep can lead to permanent and irreparable damage to the most critical part of the formation and development of the eye perception. We cannot deny the advantages of laser in order to avoid the damage it causes. We need to focus on prevention. Make a good protection, Children should be reminded that they should not expose children to laser products and should not use laser boxes as toys. If you need to use laser products, Better buy products with laser radiation category 3R and below (laser power not over 5MW). If you use the laser pen, please use it properly to avoid the laser beam burning the eyes. It is suggested that that the relevant departments monitor and disallow the sale of laser diseases or similar products in suppliers and shops around the school. If you are irradiated or injured by a laser, you should go to the eye department for active treatment and after treatment by an ophthalmologist save your damaged vision.

Differences between laser products of different classes:
Class I laser products do not present any biological hazard, The output output of Class II laser products is 0.4 MW ~1MW. This type of laser is not considered dangerous due to the reflection of the eyes. The output output of Class IIIA laser products is 1MW ~5MW. In some cases this type of laser can This type of laser causes blindness and other damage to the eyes. The output of IIIB laser products is 5MW ~500MW. This type of laser product is clearly defined as harmful to the eyes. The performance of Class IV laser products is greater than 500 MW. This laser product must cause eye damage can.