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Laser safety grade classification and industry standards

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The safety level of the laser is divided according to the laser output power and wavelength and other parameters.  According to the international standard IEC60825-1, lasers are divided into four safety levels, from 1 to 4, of which 1 is the safest and 4 is the most dangerous.  The following are specific instructions for each level:  

1 level 1 laser: This is the safest laser, the output power is relatively low, will not cause damage to the human eye.  Even direct exposure to a Level 1 laser does not cause eye damage.  

2. Level 2 laser: This laser has a higher output power than a level 1 laser, but still does not cause permanent damage to the eye.  If you look at a level 2 laser beam for a long time, it may cause a brief visual disturbance, but it will not cause permanent damage.  

3. Level 3 laser: This laser has a much higher output power than the first two and can cause permanent damage to the eye.  Therefore, appropriate safety measures must be taken to protect the eyes from laser damage.  

Class 4.4 laser: This is the most dangerous laser, the output power is very high, can instantly cause eye blindness.  In addition, level 4 lasers can also cause damage to skin, clothing and other materials.  Therefore, very strict safety measures must be taken when using a level 4 laser to avoid personal injury.  

Laser safety standards mainly refer to the safety specifications and operating guidelines for laser equipment, designed to ensure the safety of personnel and equipment during the use of lasers.  International laser safety standards mainly include the following:  

1. ANSI Z136 is a laser safety standard issued by the American National Standards Institute (ANSI), similar to IEC60825-1, which also includes the classification, marking, safety distance, protective measures and other content of laser equipment.  The difference is that ANSI Z136 also provides for the daily maintenance and safety management of laser equipment, and is a widely used laser safety standard in North America.  

2.CE EN207 is one of the laser safety standards issued by the European Union, which mainly stipulates the design, testing and marking of laser protective glasses.  The standard requires that laser protective goggles must be strictly tested to ensure that they can effectively protect the human eye from laser radiation.  

According to the CE EN207 standard, laser protective glasses need to meet the following requirements:  

1.) Protection wavelength range: Laser protection glasses need to be designed and tested for specific wavelengths of laser, and different wavelengths of laser need to use the corresponding protective glasses.  

2) Optical density: Laser protective glasses need to have a certain optical density to ensure the protective effect.  

3) Field of view requirements: Laser protective glasses need to meet the corresponding field of view requirements to ensure that users have enough field of view at work.  

4) Durability and stability: Laser protective eyes need to have high stability in the environment.  

5.) Identification requirements:  Laser protective glasses need to mark relevant information on the product, including wavelength range, optical density, field of view and other information, so that users can correctly select and use in short, CE EN207 standard is the safety standard for laser protective glasses within the EU, through strict testing and requirements,  Ensure that laser protective glasses effectively protect the user's eyes from laser radiation.  

In addition, countries will also issue corresponding laser safety standards according to their own circumstances to ensure the safety of the use of laser equipment within their own country.  Therefore, when using laser equipment, it is necessary to understand the local laser safety standards and regulations, and strictly comply with the corresponding operation guidelines and safety measures to ensure the safety of personnel and equipment.


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