What is magical about the green laser pointer?
The Green laser pointer has been well received by consumers in the market. But pay attention to safety when using it. Astronomy enthusiasts should pay attention when using the laser pointer to point the star. They should not use the pointing star frequently and for a long time, so as not to hinder other people's stargazing and photography. In a crowded public place, in order to avoid accidentally hurting others, you should stop using the laser pointer. Some high-power laser pointers have obvious thermal effects and cannot be used continuously for a long time, especially solid-state lasers that are more sensitive to temperature.
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Although the green laser pointer is powerful and can do many impossible tasks, it should be used carefully to avoid accidentally hurting yourself or others. The green laser pointer is essentially similar to the Tyndall phenomenon. The laser is scattered by impurities in the air, leaving a bright light path. When the air is particularly clean, the efficiency of the pointing pen decreases. However, this problem is basically not a problem in China. Generally, the light below 5 milliwatts is not bright enough, and the above 100 milliwatts is not only dangerous, but too bright is not suitable for other purposes. The measured 100mw finger star pen cannot be used as an ordinary laser for ppt presentation, because it will be very dazzling if it is too bright. Around 20-30mw is more appropriate.
2021-09-14 11:47:40
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