How many items can the laser pen burn?
Laser pens between 0.4 and 1 MW are considered to be level 2. It is considered safe and can be accidentally exposed in the event of eye injury. However, this will dazzle the exposed people and cause them to interfere with their activities of flying an aircraft or driving a vehicle. Exposing a pilot or pilot to this laser is likely to be arrested and imprisoned. Laser indicators up to 4.99 MW are considered to belong to category 3R. It can burn the retina, but under normal circumstances of accidental exposure, people will look away or blink before irreversible damage occurs.
Getting a green laser pen is unnatural, but it is often considered the most visible demonstration tool. The green DPSS laser converts the electric energy into 808nm infrared light, and then sends it to the neodymium crystal, which converts 50% of the electric energy into 1064nm infrared light. The 1064 nm beam is then sent to the KTP crystal, which converts 50% of the 1064 nm green light to 532 nm. There is a long process before I finally get it.
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Not all high powered laser are suitable for astronomy and pointers. Preventive measures show that green laser can guide stars well at night. The human eye responds to different colors, and our insensitivity to color spikes is green. The green laser cannot point to your eyes, and you can see a very narrow beam over a long distance for night vision. That's why in astronomy, red lasers don't interfere with your night vision.People will find that the green laser pen between 1MW and 5MW is not bright enough and is invisible in astronomy. The light beam will become dark and gloomy in the sky. On the contrary, high-power laser may damage the retina and lead to serious aviation accidents.
2021-11-10 12:05:33
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