Class I laser belongs to low energy level laser equipment (power<0.4mW), which is very safe and can avoid all electrostatic hazards, without biological hazards. The following are several application areas of Class I laser: laser printers, CD players, CD ROM devices, geological survey equipment, and experimental analysis equipment. No matter under any conditions, the class I laser will not cause damage to the human body or skin. When using Class I laser equipment, no other auxiliary safety equipment is required.
Class II laser is also a low energy level laser (with a power of 0.4mW-1mW), but this laser can damage people‘s eyes. Some applications of Class II lasers include laser indicators, aiming devices, and some distance measurement equipment. Avoid looking directly at the class II laser, and also do not aim the class II laser at anyone‘s eyes. Additionally, it is important to avoid using a telescope to view the Class II laser. In fact, if a Class II laser enters your eyes, you should immediately turn your head to one side or close your eyes immediately to prevent laser damage.
Class III is divided into IIIA and IIIB levels:
Class III Class A laser is a strong laser, generally referring to a continuous laser wave with a power of 1-5mW. It belongs to a medium energy emission device, and the scattering of light is harmful to the human body. Products equipped with Class III a lasers have a harmful distance of 1000m (3300ft) in open areas. Different countries have different regulations on the use of laser products. Currently, many foreign countries do not allow third-level laser products to be used in cities, and diffuse scattering blocking materials must be laid to prevent laser beams from passing through restricted areas (harmful distances *), and the excitation beam must be stopped when someone is active.
Class III Class B laser is a medium power laser, generally referring to a power of 5-500mW. Not only is direct viewing prohibited, but scattered laser light can also cause damage to the human body. Whenever operating within the laser control area, it is necessary to wear isolation clothing and specialized protective goggles. Prohibit use in areas with human activity.
Class IV laser is a high-power laser, generally referring to a power greater than 500mW. The following are examples of using Class IV laser, cutting, welding, and fiber mechanical processing. Class IV lasers are very dangerous and can cause fires to occur.
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