Ultra-high focal length laser pointer
One night, I saw a strange zigzag lamp appeared in front of me while driving home. Someone had to buy a green laser pointer that clearly showed the explosion of a powerful Laser pointer-pointing at cars, buses, and unsuspecting pedestrians. At first, the red dot flashed on the street in front of me, and then in my car. Then it hit my eye. Fuck you, idiot.
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The laser only pointed at my retina for a second, but it was enough to blind me. Fortunately, the local Jedi did not fall with them, who would betray the foggy day where the dewdrops might shine on the laser and its hiding place. And how, I also took action. The classification of laser safety grade refers to the definition index of the damage mechanism and the degree of damage caused by the laser system to human tissues. For laser products that will cause Shanghai to the human body, warning labels with laser hazard classification words should be affixed. The International Electrotechnical Commission standard (IEC 60825-1) divides laser products into the following 7 grades according to the wavelength and maximum output laser power of laser products, namely: 1, 1M, 2, 2M, 3R, 3B, and 4. Among them, the two levels of 1M and 2M represent that the safety level of the product is the same as that of level 1 and 2, but when using optical equipment such as telescopes, the degree of hazard may be amplified to exceed the hazard of level 1 and 2. Level 3 is also divided into two sub-levels, 3R and 3B.
2021-10-13 11:47:28
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