Summary of laser safety knowledge
Today, although lasers are a common device in LABS or workplaces, for the average person, the first impression of a laser is mostly from The James Bond movie "Goldfinger." A laser pointer is the simplest laser device that ordinary people can use. This kind of equipment is usually used for demonstration or visual demonstration, and has a wide range of applications in astronomy, architecture, fire protection and other fields. However, in addition to being easy to use, laser Pointers can also cause damage to people around them or the environment. While the risk of exposure to aircraft is low, it could be harmful. Therefore, appropriate warnings should be provided for 3R lasers (this also applies to higher-level lasers). If you are still using the old classification system, you will find that the same applies in principle to class IIIa (or 3A) laser equipment.
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In recent years, high powered laser injury accidents occur frequently, which has aroused widespread concern in the society. At this year's National People's Congress, some deputies suggested tighter control of laser Pointers. To be clear, the laser pointer itself is not harmproof and users should not point it at people, animals or vehicles. In addition, the risk of injury from the laser pointer is difficult to quantify and depends on many factors other than the output power, including laser divergence, distance from the target, stability, etc. However, unsafe use of laser Pointers greatly increases the risk of injury. Class 3R laser systems, such as laser Pointers and laser scanners, present greater security risks than previous classes. However, if the 3R grades are used carefully, they are still considered safe. Looking directly at the beam, especially through an optical instrument, can cause 3R eye damage. But, in general, short-term eye contact won't hurt them immediately (the acceptable exposure time depends on the wavelength range).
2021-10-25 09:19:15
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