What is a real green laser pointer?
There is still a long way to go to get a finished green Laser pointer from a standard laser diode. The laser filter is designed inside the laser device to prevent the infrared light from the laser diode from being scattered. However, poor green lasers have been developed without infrared filters. When people point to poor quality lasers, they will also see invisible infrared rays. Invisible infrared light is dangerous to the human eye. In general, only qualified personnel are recommended to operate infrared lasers with special laser safety devices. Exposure of the eyes to infrared rays can cause visual impairment or severe damage to the retina.
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The first-level standard laser has an output power of less than 0.4 milliwatts. This is because the laser with this energy will not cause damage to the eyes and skin under any conditions, and it will not cause damage to the human body even after being focused by the optical system. Damage, so this type of laser products belong to the type that does not require special management.
The laser output power of the secondary standard is between 0.4 milliwatts and 1 milliwatt, and the reaction time for people to close their eyes is 0.25 seconds. The exposure calculated by this time cannot exceed the MPE value. Generally, lasers below 1 milliwatt can cause dizziness. Therefore, such lasers cannot be used to directly irradiate the eyes, let alone observe this laser with a remote device.
If the laser beam of the third-level standard is directly shot into the eyes, it will cause damage to the eyes, and its output power is between 1 and 500 milliwatts.
The fourth-class standard laser is a high-output continuous laser with an output power greater than 500 milliwatts, which may cause a fire hazard.
It is understood that when the laser light emitted by the laser pointer reaches the sensitive part of the human retina, it will cause damage to the eyes. In addition, after seeing the dazzling light beam for a long time, it will also affect the optic nerve and central nervous system, causing dizziness and even nausea. Therefore, the laser beam must not be used to irradiate the face or eyes of others, and objects such as mirrors must not be used to reflect the laser.
2021-10-06 09:45:04
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