High-power lasers emit pulsed lasers instead of continuous lasers. The use of swimming punching lasers generates less heat, while continuous lasers generate more heat. This is the reason why high-power lasers use pulses. It depends on how powerful it is. Take the 1.2W blue laser flashlight as an example, within 3 meters, you can easily light matches, newspapers and the like. The blue laser pointer can point a certain substance within 6 meters. Just imagine, if such a powerful laser accidentally irradiates the eyes at such a short distance, it will inevitably cause physical damage. If the skin is irradiated, such as within 1 meter, it will burn instantly. Therefore, the effect of high-power laser irradiation on pork skin will have similar damage to the human body. It must be used correctly and safely.

Consumer warnings introduced that the degree of harm of laser products from low to high is Class 1, Class 1M, Class 2, Class 2M, Class 3R, Class 3B, Class 4. Only Class 1 laser products are considered under reasonable and foreseeable use conditions. It is safe and allowed as a children's toy. But it should be noted that the improper use of the laser pointer may damage the eyes. When purchasing children's toys, parents should carefully check whether the toys have lasers. Do not buy laser products of more than class 1 or unknown class as children's toys. Do not directly illuminate the eyes or observe the beam through optical instruments when using them. It is understood that my country currently divides the laser's harm to humans into four levels. The first level has an output power of less than 0.4 milliwatts, the second level is between 0.4 milliwatts and 1 milliwatt, the third level is between 1 milliwatt and 500 milliwatts, and the fourth level is more than 500 milliwatts. When the output power is greater than 0.4 milliwatts, this type of laser cannot be used to irradiate the eyes directly. When the output power reaches level three, it is easy to cause damage to human eyes. In addition, if the driver of a car is irradiated with a laser pointer, the eyesight of the irradiated person will decrease for a short time, and accidents are prone to occur.

The application of laser pointers is very wide and brings a lot of convenience to related fields. However, malicious use of laser pointers and other Laser pointer is extremely dangerous. It will not only endanger the health of others, but even cause unpredictable harm. Therefore, it is harmful to the public. It is very necessary to popularize laser knowledge.